The Atlantic Coast Observer Network - Virginia/North Carolina/South Carolina
http://members.cox.net/wxr/acon.htm

SUMMARY OF CLIMATOLOGICAL DATA 


MAY 2011


...ABOVE NORMAL TEMPERATURES...
...BELOW NORMAL RAINFALL...


  • WEATHER SYMBOLS - WHAT'S THAT "S" WITH THE ARROW THROUGH IT?    (From the CoCoRaHS website:) Those of you interested in weather will want to learn the 100 weather symbols used today in meteorology. You might recognize some of the more common ones and there will be others that are unfamiliar. Here is a great list of those symbols by the National Weather Service's JetStream - Online School for Weather. Click here: Weather Symbols. Weather symbols have been used by meteorologists for many years on surface weather maps, often seen at station weather plots. Click here: Weather Maps. So the next time you see a comma or set of periods you might think punctuation, but than again you just might think precipitation! By the way, that "S" with the arrow through it . . . that's a moderate duststorm.


  • WANTED: YOUR QUESTIONS    Wanted: Questions for the "Weather Queries" column in Weatherwise Magazine As you go out each morning to take a look at your rain gauge, or any other time you're outdoors, do you ever puzzle about what's going on in the sky? Do you wonder about spells of unusual weather? If you have a question about weather or climate, send it to: weatherqueries@gmail.com. Tom Schlatter, a fellow CoCoRaHS volunteer, has been writing a question and answer column in Weatherwise since 1980, and he welcomes questions from young and old. No question is too simple. In fact, sometimes the "simple" questions are the most profound. Send your questions to weatherqueries@gmail.com, and be sure to include your name and the city or town where you live.


  • "ASK JACK AT  USA TODAY"
  •    Kevin Shaw of ACON MD/DE/DC sends another resource. It is a neat webpage that will help you find specific historical weather info for the United States and even in some cases, the world! The source is organized by Jack Williams and the USA Today weather page. View here: http://www.usatoday.com/weather/resources/askjack/wfaqpast.htm.

  • "TIBETAN GLACIERS MELTING, SAYS DALAI LAMA"    The Dalai Lama says India should be seriously concerned about the melting of glaciers in the Tibetan Plateau. Read more on this subject at: http://news.yahoo.com/s/ap/20110402/ap_on_re_as/as_india_dalai_lama_ecology.

  • DROUGHT MONITOR    http://www.drought.unl.edu/dm/monitor.html    More information on drought can be found at NOAA's Drought Information Center http://www.drought.noaa.gov/


  • REMINDER All National Weather Service station data listed herein is preliminary and may be subject to change.  The data has not been certified and cannot be used in legal actions.  Only reports certified by the National Climatic Data Center in Asheville, NC can be used for these purposes.



  • ACON VA/NC/SC Member Station Extremes - MAY 2011
    State
    Maximum Temperature
    Minimum
    Temperature
    Warmest
    Average
    Temperature
    Coldest
    Average
    Temperature
    Maximum
    Precipitation
    Minimum
    Precipitation
    Virginia
    98°
    Richmond
    Arlington
    35°
    Blacksburg
    70.5°
    Norfolk (FHC)
    62.1°
    Blacksburg
    7.45"
    Bridgewater
    1.10"
    Hampton
    North Carolina
    99°
    Beaufort
    Fayetteville
    Lumberton
    36 °
    Asheville
    Charlotte
    Hickory
    72.1°
    Fayetteville
    64.6°
    Asheville
    5.14"
    Hickory
    0.47"
    Cape Hatteras
    South Carolina
    99
    Columbia
    37°
    Anderson
    74.4°
    Charleston
    69.8°
    Greenville-Spartanburg
    5.27"
    North Myrtle Beach
    0.41"
    Charleston


    ( For an explanation of column headers in the following tables,
    please note the column denotations table below. )


    TEMPERATURE / WINDS/ ELEMENTS

    VIRGINIA
    [Reminder: All NWS DATA HEREIN IS NOT OFFICIAL]
    
         STN  A      B    C     C1     D    E  F    G    H  I  J K K1  L  M      N   N1   N2   O P Q R R1 S    CWA
         --------------------------------------------------------------------------------------------------------
         BCB 73.5  50.7  62.1   +3.2  92    31 35    5   2  0  0 0 80% 28 250   1   3.2       8 0 0 0  6 2400 AKQ
                                                                       28 300  24 
         BRI 75.7  55.7  65.7   +3.7  89    30 40    6   1  0  0 0 69%                         0 0 0 0  0 0510/1600 LWX
         CEN 75.7  57.1  66.4   +4.4  92 30,31 42  5,6   2  0  0 0 71% 28 325   3   1.6  315 6 0 0 0  0 2400 LWX
         CHT 76.8  57.9  67.4   +5.1  92.3  31 41.0  6   3  0  0 0 76% 20 180   3   0.4  180 6 0 0 0  0 2400 LWX
         CHO 78.3  57.0  67.6         96    30 40    6   3  0  0 0     35 230   3   3.7       6 0 0 0  3 2400 LWX
         DAN 77.6  54.7  66.2   +0.1  93    31 36    6   2  0  0 0 76% 43 310  24   4.0      11 0 0 0  8 2400 RNK
         DCA 77.4  59.3  68.3   +2.7  98    31 46  5,6   3  0  0 0 71% 45 260  27   7.6       8 0 0 0  0 2400 LWX
         IAD 76.5  56.1  66.3   +4.0  94    31 40    6   3  0  0 0 72% 49 220  27   6.5       9 0 0 0  0 2400 LWX
         GAV 78.97 58.13 68.55        94 30,31 39    5   3  0  0 0 72% 36 360   4             9 0 0 0  0 2400 AKQ
         HDV 76.6  56.7  66.6   +2.5  94 30,31 41    6   0  0  2 0 76% 21 180   3        18010 0 0 0  0 2400 LWX
         LYH 76.1  54.8  65.5   +2.1  93    31 37    5   2  0  0 0 75% 35 190  27   3.9       7 0 0 0  5 2400 RNK
         HAM 78.0  60.0  68.0   +2.0  93    30 46  1,5   4  0  0 0     65 315  24   8.0  248 6 0 0 0  3 2400 AKQ
         NPN 80.5  58.4  68.6   +1.8  96.0  30 43.6  1   4  0  0 0     38 248  24   2.6  225 5 1 0 0  0 2400 AKQ
         FHC 80.69 60.01 70.50  +4.2  94.9  30 50.5  5   0  0  0 0 68% 41 040  24   2.0  202 6 0 0 0  0 2400 AKQ
         NOR 79.3  58.2  68.7   +1.0  93    30 45    1   4  0  0 0                             4 2 0 0  0 2400 AKQ
         ORF 79.6  60.1  69.9   +3.6  94    30 48    6   0  0  0 0 68% 56 210  18   7.9       7 1 0 0  0 2400 AKQ
         POR 80.8  58.8  69.8   +2.7  94.3  30 45.4  1   0  0  0 0 77% 56 160  24   2.5  148 7 1 0 0  1 2400 AKQ
         CTR 78.7  55.9  66.5   +1.3  93.6  31 39.3  5   3  0  3 0 80% 13 090  16   0.2  188 2 0 0 0  0 2400 AKQ
         MEC 79.84 58.15 69.46        95    31 41  5,6   3  0  0 0                             6 0 0 0  0 1700 AKQ
         RIC 80.0  58.2  69.1   +3.7  98    31 43    6   4  0  0 0 70% 60 210  13   6.5       5 0 0 0  1 2400 AKQ
         ROA 76.5  55.6  66.0   +1.9  96    31 40    6   2  0  0 0 70% 44 310  24   5.2      10 1 0 0  0 2400 AKQ
                                                                       44 250  26
         WAL 75.3  59.0  67.2   +4.9  93    30 45    1   3  0  0 0     35 320  19   8.8       1 0 0 0  2 2400 AKQ
         WOO 71.9  56.8  64.4   +2.2  88    31 41    4   0  0  0 0                             9 0 0 0  6 2400 LWX
         WSH 73.6  64.4  65.0   +1.59 92.8  30 42.5  5   2  0  0 0 80% 20 225  18   0.4  225 6 0 0 0  0 2400 LWX
    NORTH CAROLINA
    [Reminder: All NWS DATA HEREIN IS NOT OFFICIAL]
        
         STN  A      B    C     C1    D    E  F      G  H  I  J K K1  L  M     N    N1   N2  O P Q R R1 S    CWA
         -------------------------------------------------------------------------------------------------------
         AVL 76.4  52.7  64.6  +2.6  90 30,31 36     5  2  0  0 0   % 35 170  3    5.8      4 0 0 0  4 2400 GSP
         MRH 79.9  64.2  72.0        99    31 49    10  1  0  0 0     37 290  4    9.0      5 0 0 0  0 2400 MHX
         CLT 81.1  58.3  69.7  +0.7  95    31 36     5  6  0  0 0 71% 67 210 26    5.4      8 0 0 0  2 2400 GSP
         ECG 81.9  60.2  71.0  +3.1  96    30 43     5  0  0  0 0 68% 47 270 24    7.9      4 0 0 0  6 2400 AKQ
         FAY 83.7  60.5  72.1        99    31 47     5  8  0  0 0 65% 33 250 14    6.4      7 0 0 0  2 2400 RAH
         GSO 78.3  57.9  68.1  +2.3  94    31 40     5  2  0  0 0 69% 51 230 27    5.8     10 0 0 0  1 2400 RAH
         HSE 78.5  65.1  71.8  +4.2  91    31 52    10  1  0  0 0 69% 31 340 25    7.4      0 0 0 0  0 2400 MHX
         HKY 78.5  56.7  67.6  +1.3  96    31 36     5  0  0  0 0     51 300 22    3.5     10 0 0 0  4 2400 GSP
         LBT 84.0  59.8  71.9  +3.5  99    31 45   5,6  8  0  0 0 70% 36 130 14    4.5      0 0 0 0  5 2400 ILM
         MON 82.5  56.6  69.5  +1.5  95.8  31 39.6   6  8  0  0 0 78% 15 270 10    1.9 270 7 0 0 0  0 2400 RAH
         EWN 82.7  58.4  70.5  +1.6  98    31 44     6  5  0  0 0 71% 31 160 16    8.8      1 0 0 0  8 2400 MHX
         RDU 81.2  59.1  70.1  +3.1  95    31 42     5  6  0  0 0 67% 30 240 13    5.0      9 0 0 0  0 2400 RAH
                                                                      30 210 26
         RAL 80.6  56.5  68.6  +1.6  95    31 39     5  6  0  0 0     18      2,16           6 0 0 0  0 2400(T)/1930(P) RAH
         ROX 79.0  57.2  68.2  +2.7  95.0  31 39.0   5  4  0  0 0 74% 42 360 24        360 8 0 0 0  l 2200 RAH
         WHI 83.1  60.2  71.7  +1.7  96.3  31 43.6   5  7  0  0 0 73% 32 191 14    2.1 200 3 1 0 0  4 2400 ILM
         ILM 81.9  60.8  71.4  +1.2  97 25,31 46     3  0  0  0 0 71% 32 290 24    6.8      2 0 0 0  7 2400 ILM
    
    
    SOUTH CAROLINA
    [Reminder: All NWS DATA HEREIN IS NOT OFFICIAL]
       
         STN  A      B    C     C1    D    E  F      G  H  I  J K K1  L  M     N   N1   N2   O P Q R R1 S    CWA
         -------------------------------------------------------------------------------------------------------
         AND 83.1  58.1  70.6  +1.8  96    31 37     5  9  0  0 0     45 270 26   4.8       5 0 0 0  2 2400 GSP
         CAE 85.5  62.8  74.2  +2.6  99    31 47     5 12  0  0 0 65% 51 200 27   5.2       9 1 0 0  1 2400 CAE
         CRE 78.2  63.5  70.9  +0.9  96    31 47     5  1  0  0 0 78% 41 340 20   8.1       5 0 0 0  4 2400 ILM
         CHS 84.5  64.3  74.4  +2.3  96 25,31 51     5  8  0  0 0     37 350 11   7.8       3 0 0 0  2 2400 CHS
         FLO 83.4  61.3  72.3  +1.3  96    31 45     5  7  0  0 0 71% 33 340 28   5.7       6 0 0 0  8 2400 ILM
         GSP 82.0  57.6  69.8  +2.6  96    31 38     5  8  0  0 0 69% 41 020 10   4.8       7 0 0 0  1 2400 GSP
         OGB 84.8  60.7  72.8        97    23 46    18  10 0  0 0     44 360 11   4.2       0 0 0 0  6 2400 CAE
    NEARBY STATIONS
    [Reminder: All NWS DATA HEREIN IS NOT OFFICIAL]
       
         STN  A      B    C     C1    D     E  F     G  H  I  J K K1  L  M     N   N1   N2   O P Q R R1   S    CWA
         ---------------------------------------------------------------------------------------------------------
         TRI 76.9  53.1  65.0  +2.0   94    31 33    5  3  0  0 0     60 230  22  3.1       8 2 0 0  8   2400 MRX
         DAV             57.0  +2     82    31 29    5  0  0  3 0                                         0700 PBZ

    (Please note the column denotations table below.)
    PRECIPITATION / BAROMETRIC PRESSURE

    VIRGINIA
    [Reminder: All NWS DATA HEREIN IS NOT OFFICIAL]
       
         STN  T      T1      U  U1    V    V1   W X   Y      Z  1   2 3    4    5     6   6A   7    7A    8    S
         ---------------------------------------------------------------------------------------------------------
         BCB  7.32  +2.93  1.21 26  1.21    26 21 1 20.69                0.0  8.2                             2400
         BRI  7.45  +3.53  2.56 17  3.52 16-17 11 1 22.04                    11.3  30.30  31 29.59  15        0510/1600
         CEN  3.81  -0.67  0.89 15  0.98    15 13 0 17.76                0.0 13.8  30.31   1 29.52  15 29.92  2400
         CHT  3.37  -0.85  0.79 18  1.03 17-18 17 0 18.40                0.0 14.5  30.303  1 29.473 15 29.938 2400
         CHO  6.04         2.51 17  2.91 16-17 15 1 20.10                          30.31   1 29.50  15        2400
         DAN  5.33  +1.37  1.37 24  1.37    24 16 1 15.96                0.0 11.0  30.30   5 29.49  15        2400
         DCA  1.70  -2.12  0.56  4  0.58   3-4 11 0 12.67                0.0 10.1  30.32   1 29.50  15        2400
         IAD  3.28  +0.94  0.77 18  1.16 17-18 15 0 17.64                0.0 12.6            29.50  15        2400
         GAV  5.16         1.58 17  1.61 16-17 12 3 15.56                0.0  9.4  30.30   1 29.49  15 29.94  2400
         HDV  3.93  -0.97  0.97 18             17 0 18.36                0.0 14.5  30.29   1 29.46  15        2400
         LYH  3.33  -0.78  0.61  3  1.03   3-4 15 0 14.80                0.0  8.4  30.34   1 29.51  15        2400
         HAM  1.10  -2.50  0.34  4  0.34     4 13 0  7.68                0.0 17.0  30.32   1 29.51  15 29.97  2400
         NPN  3.76  -0.24  1.85 18  1.85    18 11 1 13.64                0.0 16.7  30.32   1 29.51  15        2400
         FHC  2.06  -1.68  0.64 18  0.78 24-25  8 0 15.95                0.0 18.0  30.309  1 29.533 15 29.973 2400
         NOR  2.41  -1.53  0.73 24              9 0 13.07                0.0 21.0                             2400
         ORF  1.95  -1.79  0.68 18  0.68    18  9 0 12.00                0.0 21.8  30.30   1 29.52  15        2400
         POR  2.13  -1.92  0.66 24  0.75 24-25 10 0 14.43                0.0 19.0  30.31   1 29.53  15 29.968 2400
         CTR  3.38  -0.63  1.08  4  1.08     4 14 1 15.02                0.0 12.1  30.10   1 29.93  15 29.931 2400
         MEC  4.28         1.39 14  2.37 14-15  8 2 17.97                0.0 10.8  30.03   1 29.32  15 29.73  2400
         RIC  4.35  -0.39  1.74 14  1.74 13-14  9 2 15.83                0.0 10.8  30.34   1 29.51  15        2400
         ROA  3.79  -0.45  0.92 17  0.92    17 17 0 16.37                0.0 10.4  30.35   5 29.53  15        2400
         WAL  1.31  -1.89  0.41  4  0.41     4  8 0 10.33                0.0 17.0  30.31   1 29.52  16        2400
         WOO  6.10  +1.91           2.69 17-18 18 1 21.17                0.0 12.8  30.70  30 29.60  15        0800
         WSH  3.54  -0.45  1.52 17  1.59 16-17 15 1 22.89                0.0 14.7  30.32   1 29.53  15        2400
    NORTH CAROLINA
    [Reminder: All NWS DATA HEREIN IS NOT OFFICIAL]
       
         STN  T      T1      U  U1    V    V1   W X   Y      Z    1 2  3   4    5     6    6A   7    7A    8     S
         ----------------------------------------------------------------------------------------------------------
         AVL  2.95  -1.47  0.65 3,26 .72 26-27 11 0 19.32                 0.0 20.8  30.34   5 29.57  15         2400
         MRH  0.66         0.37 26  0.38 20-21  7 0 14.24                 0.0    T  30.30   2 29.58  15         2400
         CLT  4.73  +1.07  1.25 16  2.02 16-17 10 1 17.37                 0.0  8.9  30.34   5 29.54  15         2400
         ECG  0.58  -3.85  0.19 25  0.28 24-25  7 0 12.45                 0.0       30.31   1 29.54  15         2400
         FAY  1.22         0.33  6  0.41 27-28 10 0 11.75                                     29.25  31         2400
         GSO  3.58  -0.37  0.56 16  0.92 16-17 14 0 14.60                 0.0  9.9            29.25  31         2400
         HSE  0.53  -3.39  0.13 15  0.13    15  7 0 16.94                 0.0  6.0  30.30   2 29.59  15         2400
         HKY  5.14  +0.68  0.90  3  1.77   3-4 12 0 17.70                 0.0    T  30.31   5 29.50  15         2400
         LBT  3.04  -0.93  0.72 27, 1.10 27-28 11 0 13.52                 0.0       30.30   5 29.53  15         2400
                                28   
         MON  3.38  -0.81  1.28 27  1.33 27-28 12 1 13.22                 0.0 16.9  30.316  4 29.511  6  29.914 2400
         EWN  0.47  -3.72  0.18 28  0.18    28  6 0 10.52                 0.0  4.4  30.30   2 29.56  15         2400
         RDU  4.04  +0.25  1.64 27  1.64    27 11 1 13.86                 0.0  9.0            29.25  31         2400
         RAL  3.08  -0.71           1.06 26-27 12 1 13.09                 0.0  9.1  30.29   5 29.55  15         0730
         ROX  4.65  +0.84  1.70  4  1.70     4 14 1 16.42                 0.0 11.7  30.34   5 29.55  15  30.02  2200
         WHI  2.49  -2.05  0.72 14  0.75 14-15  7 0 17.30                 0.0  9.2  30.297  5 29.540 11  29.974 2400
         ILM  1.63  -2.77  0.97 13  0.98 12-13  5 0 12.54                 0.0  4.0  30.29   2 29.56  16         2400
    SOUTH CAROLINA
    [Reminder: All NWS DATA HEREIN IS NOT OFFICIAL]
       
         STN  T      T1     U  U1   V    V1   W X   Y     Z   1  2 3  4     5     6     6A   7    7A    8     S
         ------------------------------------------------------------------------------------------------------- 
         AND  1.27  -2.63 0.36  3  0.63 26-27  6 0 14.82               0.0    T  30.34   5 29.56  14         2400
         CAE  2.74  -0.43 0.99  3  1.18   3-4 12 0 15.69               0.0  4.8  30.33   5 29.56  15         2400
         CRE  5.27  +2.28 1.92 11  2.46 10-11  6 2 15.28               0.0       30.29   5 29.57  15         2400
         CHS  0.41  -3.26 0.25 11  0.25    11  3 0 10.19               0.0  0.2  30.29   5 29.58  15         2400
         FLO  1.59  -1.72 0.61 11  0.62 10-11 10 0 13.86               0.0       30.31   5 29.55  15         2400
         GSP  3.33  -1.26 0.88 26  1.66 26-27 10 0 19.66               0.0  8.6  30.33   5 29.53  15         2400
         OGB  2.09        0.56 27  0.62 26-27 10 0 15.17                         30.33   5 29.58  17         2400
    NEARBY STATIONS
    [Reminder: All NWS DATA HEREIN IS NOT OFFICIAL]
       
         STN  T      T1     U  U1   V      V1  W X   Y      Z  1  2  3   4      5     6   6A   7    7A 8      S
         --------------------------------------------------------------------------------------------------------
         TRI  5.93  +1.61 1.13 10 1.13    10 14 2 23.28                  0.0  15.6  30.37  5 29.55  14        2400
         DAV  6.68  +0.9  1.64 18            19 1 34.69   0.3  4  2  0  23.3 215.0                            0700    

    Virginia:

    Arlington - " TEMPERATURES AVERAGED ABOVE NORMAL THIS MAY IN WASHINGTON DC. THE AVERAGE TEMPERATURE OF 68.3F THIS MONTH RANKED AS THE 19TH WARMEST MAY SINCE TEMPERATURE RECORDS BEGAN IN 1872...BUT STILL AVERAGED A WHOLE DEGREE FAHRENHEIT LOWER THAN MAY 2010. MAY ENDED ON A HOT NOTE. DAILY MAX TEMPERATURES IN THE 90S WERE OBSERVED ON THREE OF THE LAST SIX DAYS OF THE MONTH. THE MAX TEMPERATURE OF 98F RECORDED ON THE 31ST WAS TIED WITH 30 MAY 1991 FOR THE SECOND WARMEST DAILY TEMPERATURE READING IN MAY. ONLY A MAX TEMPERATURE OF 99F ON 31 MAY 1991 WAS HIGHER. THE TEMPERATURE FAILED TO REACH OR DROP BELOW 45F DURING THE ENTIRE MONTH FOR ONLY THE SECOND MAY IN THE LAST TEN YEARS. WASHINGTON DC EXPERIENCED DRIER THAN NORMAL CONDITIONS IN MAY. ONLY TWO DAYS THIS MONTH...THE 4TH AND 14TH...RECORDED DAILY RAINFALL OF ONE QUARTER INCH OR GREATER...WHICH ARE THE LEAST FREQUENT NUMBER OF SUCH DAYS IN MAY SINCE 1999. " - [ + - ] - Notes from NWS Sterling, VA

    Bridgewater - " This was the wettest May in 40 years. May precipitation in 1971 was 8.66 inches. So, this was the wettest May since 1971. Precipitation for the year is around 5 inches above normal. Already, we have had more thunderstorms this year than all of last year. " - [ + + ] - additional notes from Clayton

    Chantilly - Russ sends these additional notes: " The six warmest May on record. Temperatures averaged 5.1 above normal, with a departure of +2.2 for average high temp and +8.0 for average low temp. A record high low temp was set on the 30th (70.1) and 31st (71.6). The record high low temp on the 31st was the highest low temp ever recorded at this station in May. Precipitation was 0.85" below normal, but seven consecutive days of rainfall were recorded on the 13th thru the 19th. Thunder was observed on the 19th. Thunderstorms rumbled through on the 14th, 16th, 17th, 18th, 23rd and 25th. *Please note, anemometer is currently partially obstructed from the North and East " - [ + - ]

    Dulles - from NWS Sterling (KLWX): " MAY TEMPERATURES AVERAGED WELL ABOVE NORMAL AT DULLES. THE AVERAGE TEMPERATURE OF 66.3F WAS RANKED THE SIXTH WARMEST MAY SINCE TEMPERATURE RECORDS BEGAN IN 1962. MAY ENDED ON A HOT NOTE. DAILY MAX TEMPERATURES IN THE 90S WERE OBSERVED ON THREE OF THE LAST SIX DAYS OF THE MONTH. THE MAX TEMPERATURE OF 94F ON THE 31ST WAS TIED FOR THE SIXTH WARMEST DAILY TEMPERATURE FOR ALL OF MAY. THREE DAILY TEMPERATURE RECORDS WERE EITHER TIED OR BROKEN IN MAY. THE MAX TEMPERATURE OF 94F ON THE 31ST TIED THE OLD DAILY MAX TEMPERATURE RECORD SET IN 1991. THE MIN TEMPERATURE OF 67F ON THE 29TH TIED THE OLD DAILY HIGH MIN TEMPERATURE RECORD FROM 1991 AND 2010. THE MIN TEMPERATURE OF 70F ON THE 30TH BROKE THE PREVIOUS DAILY HIGH MIN TEMPERATURE RECORD OF 67F BACK IN 1982. DULLES WAS DRIER THAN NORMAL THIS MAY. HOWEVER...MEASURABLE PRECIPITATION WAS RECORDED ON SEVEN CONSECUTIVE DAYS FROM 13-19 MAY. THE ONLY LONGER PERIOD OF CONSECUTIVE DAYS WITH MEASURABLE PRECIPITATION IN MAY WAS THE NINE-DAY STRETCH FROM 21-29 MAY 2003 AND THE EIGHT-DAY STRETCHES FROM 18-25 MAY 1979 AND 2-9 MAY 1996. " - [ + - ]

    Glen Allen - Lowell Koontz sends these notes: " May was warmer than average but 1.0F cooler than May last year as the monthly mean temperature was 68.6F, a +4.0F departure, and was above average in precipitation (when compared to Ashland, Virginia records). The 5.16 inches of precipitation for May was a +1.31 inch departure when compared to the Ashland, VA average. May had three days with more than 1 inch of rain and 12 days with measurable rainfall. The maximum precipitation recorded in a day was 1.58 inches on the 17th and thunder was heard on nine days during May. We had 3.40 inches of rain in five consecutive days from the 13th to the 17th. On the 13th, there was a lightning strike while drizzle was falling very unusual. The maximum temperature for May was 94F on the 30th and 31st. There were 8 days that the maximum temperature was 85F or above. The highest minimum temperature recorded here for the month was 73F on May 26th. The Richmond International Airport had 5 ties / records: Record High Minimums - May 26th 70F tied the old record set in 2006; Record High Maximums - May 31st 98F tied the old record in 1991; May 30th 70F tied the old record set in 1959; Record daily mean temperatures - May 26th 81.5F new record; the old record was 81.0F in 1984; Daily Precipitation: May 14th 1.74 inches the old record was 1.48 inches in 1972. The airport mean temperature was the 16th warmest in 115 years. The airport rainfall was 4.35 inches the 40th wettest in 115 years. The maximum wind gust at Glen Allen was 36 mph from the north that occurred on the 4th at 0517. May 2011 had more wind and was sunnier than May last year. The Spring Season was much warmer than average and a little wetter than average when compared to Ashland, VA records.

     

     

    Ashland

    Glen Allen

    Temp.

    Ashland

    Glen Allen

    Precip.

    Mean

    Mean

    Depart.

    Precip.

    Total

    Depart.

     

    Temp.

    Degrees

    F

    Average

    Precip

    Inches

    Mar.

    46.74

    48.05

    1.31

    3.75

    4.24

    0.49

    Apr.

    56.61

    61.40

    4.79

    3.07

    2.41

    -0.66

    May

    64.56

    68.55

    3.99

    3.85

    5.16

    1.31

    SUM

    167.91

    178

    10.09

    10.67

    11.81

    1.14

    Spring AVE.

    55.97

    59.33

    3.36

    3.56

    3.94

    0.38

     

    " - [ + + ] 

    Herndon - Randy sends these additional notes: " May was above normal for temperature and below normal precipitation. The temperatures ranged between a high of 94 and a low of 41. The average highs/lows were 2.0 and 3.0 degrees above normal, respectively. The heat and humidity came in like gangbusters during the last week of the month; the rest of the month was really very pleasant. On the precipitation side, the month was 0.97" below normal with 3.93" measured. Rain fell off and on for most of the month, with thunderstorms occurring on ten days. The heaviest rain (0.97") came on the 18th, during a weeklong period of showers and thundershowers. " - [ + - ]

    Portsmouth - " May's average temperature (69.8) was 2.7 ABOVE NORMAL. The month was the 7th warmest May in the database to May 1977. Rainfall was BELOW NORMAL by 1.92" and was 53% of normal relative to normal Mays for the period from 1977 to 2010. No frost was recorded during the month. Frontal passages were noted on the 4th, 8th, and 19th. Station Records: 6th -TEMPERATURE TIED Minimum 46 [previous 1979]; 24th - WIND GUST 56mph [previous 31mph 1988]; 24th - TEMPERATURE Maximum 93 [previous 92 1987]; 30th - TEMPERATURE TIED Maximum Miinimum 70 [previous 1987]. " - [ + - ] 

    North Carolina:

    Greensboro - NWS RAH notes: " THE LOW TEMPERATURE ON MAY 30 AT THE PIEDMONT TRIAD INTERNATIONAL AIRPORT WAS 69 DEGREES. THIS BREAKS THE OLD RECORD HIGH MINIMUM OF 68 DEGREES... LAST SET IN 2010. " - [ + - ] 

    Raleigh - NWS RAH notes: " THE LOW TEMPERATURE MAY 24 AT RALEIGH-DURHAM INTERNATIONAL AIRPORT WAS 70 DEGREES. THIS TIES THE OLD RECORD HIGH MINIMUM LAST SET IN 1955. A RECORD HIGH TEMPERATURE OF 93 DEGREES WAS SET AT RALEIGH-DURHAM INTL AIRPORT NC ON MAY 25. THIS TIES THE OLD RECORD OF 93 SET IN 2004. THE LOW TEMPERATURE MAY 26 AT RALEIGH-DURHAM INTERNATIONAL AIRPORT WAS 73 DEGREES. THIS BREAKS THE OLD RECORD HIGH MINIMUM TEMPERATURE OF 70 LAST SET IN 2004. A RECORD RAINFALL OF 1.64 INCH(ES) WAS SET AT RALEIGH-DURHAM INTL AIRPORT NC MAY 27. THIS BREAKS THE OLD RECORD OF 1.3 SET IN 1965. THE LOW TEMPERATURE MAY 29 AT THE RALEIGH-DURHAM INTERNATIONAL AIRPORT WAS 70 DEGREES. THIS BREAKS THE OLD RECORD OF 69 DEGREES SET IN 1991. A RECORD HIGH TEMPERATURE OF 94 DEGREES WAS SET AT RALEIGH-DURHAM INTL AIRPORT NC MAY 30. THIS TIES THE OLD RECORD OF 94 SET IN 1953. THE LOW TEMPERATURE MAY 30 AT RALEIGH-DURHAM INTERNATIONAL AIRPORT WAS 70 DEGREES. THIS TIES THE OLD RECORD HIGH MINIMUM LAST SET IN 1974. " - [ + + ]

    Raleigh - Bob reports: " THE AVERAGE DAILY TEMPERATURE WAS +1.6 DEGREES ABOVE NORMAL. AFTER A VERY COLD DECEMBER AND JANUARY, THIS IS THE 4TH CONSECUTIVE MONTH OF ABOVE NORMAL TEMPERTURES. DRY CONDITIONS CONTINUED WITH RAINFALL -0.64" BELOW NORMAL AND YTD DEPARTURE IS NOW -4.93. BELOW NORMAL. SEVERE WEATHER WAS A THREAT DURING MAY INCLUDING FOUR (4) SEVERE THUINDER WATCHES ISSUED, BUT NO SEVERE WEATHER WAS OBSERVED. " - [ + - ]

    Moncure - Mac sends these additional notes: " May was certainly about as normal as possible. With a mean temp of 68.6, close to the average. We were actually below normal for the first 3 weeks of the month, but that last 10 days all but 2 days were above 90 deg. Summer started a month early with a vengeance!! ( 30YR DATA BASED ON 30YR CLIMATOLOGICAL DATA, SANFORD 8 NE, NC. STATION #317656, CLIMATE DIV 4. ) " - [ + - ]

    North Whiteville - Christopher reports: " If anything stands out in the month of May, it is DRY WEATHER and the unseasonable heat toward the end of the month. All of our 90-degree days were recorded after May 22 (last year I measured 90 degrees on May 2). Of the last 10 days of the month, 7 had maximum temperatures greater than 90. In total, out of 31 days, precipitation was measured on 7 days, or 22.6% of total days. " - [ + - ]

    Nearby Cities:

    Tri-Cities, TN - from NWS Morristown, TN: " Tri-Cities received 5.93 inches of rain in May, which was 1.61 inches above normal. It ranked as the 10th wettest May on record. Measurable rain occurred on 14 days and seven of those days had more than one-quarter of an inch of precipitation. The heaviest rain fell on the 10th when 1.13 inches of rain was reported, which also broke the old daily rainfall record of 0.77 inches set in 1958. The wettest May of the 73 years of observations taken at Tri-Cities was in 1950 when 9.71 inches of rain was recorded. Tri-Cities received a seasonal total 16.87 inches of rain in spring, which was 5.41 inches above normal. It ranked as the 4th wettest spring on record. The wettest spring was in 1973 when 17.22 inches of rain was recorded. The monthly-averaged temperature at Tri-Cities in May was 65.0 degrees, which was 2.0 degrees above normal. It ranked as the 30th warmest May on record. A record high temperature was tied on the 10th when the temperature reached 85 degrees, tying the previous record set in 2007. In addition, a record high temperature was broken on the 29th when the temperature reached 90 degrees, breaking the previous record of 89 degrees set in 2006. Also, a record high temperature was broken on the 30th when the temperature reached 93 degrees, breaking the previous record on 91 degrees set in 2006. Lastly, a record high temperature was broken on the 31st when the temperature reached 94 degrees, surpassing the previous record 92 degrees set in 1969. The warmest May at Tri-Cities was back in 1962 when the monthly-averaged temperature was 71.2 degrees. The seasonal-averaged temperature at Tri-Cities in spring was 57.9 degrees which was 3.2 degrees above normal. It ranked as the 9th warmest spring on record. The warmest spring at Tri-Cities was back in 1991 when the seasonal-averaged temperature was 59.5 degrees. " - [ +  + ]

    Davis, WV - from Dave Lesher's website: " May 2011 had a mean temperature of 57 and that was 2 ABOVE NORMAL. The month's rainfall total of 6.7 inches was 0.9" ABOVE NORMAL. Rainfall for the year of 34.7" was 10.9" ABOVE NORMAL. The 0.3" of snow was ABOUT NORMAL snowfall for the month. The season-to-date snowfall of 215" was 72" ABOVE NORMAL." - [ +  + ]



    COLUMN DENOTATIONS:

    A  maximum mean temperature T total precipitation (inches)
    T1 departure from normal
    B  minimum mean temperature U maximum calendar day precipitation (inches)
    C  monthly mean temperature
    C1 departure from normal
    U1 date of maximum calendar day precipitation
    D  maximum temperature V date(s) of maximum daily precipitation
    E  date(s) of maximum temperature V1 maximum 24-hour precip. & date(s)
    F  minimum temperature W number of days with precip. >= .01"
    G  date(s) of minimum temperature  X number of days with precip. >= 1.0"
    H  days with maximum temperature >=90 Y year-to-date precipitation (inches)
    I  days with maximum temperature <=32 Z maximum calendar day snowfall (inches)
    J  days with minimum temperature <=32 VRB Variable
    K  days with minimum temperature <= 0 1 date of maximum calendar day snowfall (inches)
    K1 average relative humidity 2 number of days with snowfall
    L  peak wind gust (miles per hour)  3 number of days with snowfall >= 1.0"
    M  direction of peak wind gust 4  total snowfall for month (inches)
    N  date(s) of peak wind gust  5 total snowfall for 2007-2008 season (inches)
    N1   average wind speed (miles per hour) 6 maximum barometric pressure (inches)
    N2 dominant wind direction 6A date of maximum barometric pressure
    O  number of days with thunder  7 minimum barometric pressure (inches)
    P  number of days with hail 7A date of minimum barometric pressure
    Q  number of days with glaze 8   average sea-level pressure
    R  number of days with ice pellets STN  Station
      NR not recorded
    R1 number of days with dense fog [1/4 mile and less visibility] (i) incomplete data
    S  local observation time for temps/precipitation (M) missing, if listed in data table
     ~ "about" E estimated
     +  additional indeterminate number of days CWA - NWS Office County Warning Area


    For ACON VA/NC/SC Recent Weather News, Search GOOGLE at CNN
    http://www.cnn.com/WEATHER
     

    National Weather Service Web Sites & Current Email Addresses
    Within or Nearby the ACON VA/NC/SC Area Can Be Found At:

         NWS Washington/Baltimore, VA/MD
         NWS Wakefield, VA
         NWS Blacksburg, VA
         NWS Raleigh, NC
         NWS Newport/Morehead City, NC
         NWS Wilmington, NC
         NWS Greenville-Spartanburg, SC
         NWS Columbia, SC
         NWS Charleston, SC
         NWS Morristown, TN

         National Weather Service Homepages

         $$$ National Climatic Data Center, Asheville, NC $$$

    STATION / LOCATION (MILES & DIRECTION FROM MAIN POST OFFICE)/OBSERVER / YEAR RECORDS BEGAN / EMAIL ADDRESS:

       Coast Guard Air Station 36-15-47N 076 10-58W 11M
    AKQ    Wakefield, VA NWS Wakefield Municipal Airport 36-58-53N 077-00-04W 33M  
    DCA    Arlington, VA Washington, DC, Reagan Washington National Airport 38-50-54N 077-02-03W 18M WSH   Washington, VA  David Yowell runamok@runamok.com
    BCB    Blacksburg, VA NWS Virginia Tech Airport 37-13N 080-25W   
      WOO  Woodstock, VA 5NW Lauck Walton 12/1/85 jwalton@shentel.net
       LDY Ladysmith, VA Danny Jessee 2003 STATION CLOSED 8/31/2010 danny@dannyjessee.com
    BRI     Bridgewater, VA Clayton Towers Ctowers19@aol.com WAL   Wallops Island, VA 37 56'26" N 75 27'47" W Wallops Flight Facility Airport
    CEN  Centreville, VA Paul Bassett 1985, 38 50.9788' N LAT. 77 25.6374' W LON. | Elevation 324' | m.psb@verizon.net AVL    Asheville, NC  Asheville Regional Airport 35-25-55N 082-32-15W 670M
    CHO   Charlottesville, VA  Charlottesville-Albemarle Airport ASOS  (Rappahannock County) 38-08-18N 078-27-21W 192M MRH    Beaufort, NC  Michael J. Field Airport 34-44-01N 076-39-38W 3M
    DAN  Danville, VA, Danville Regional Airport, 36-34-22N 079-20 10W 175M  CLT    Charlotte, NC NWS Charlotte/Douglas International Airport 35-12-48N 080-56-55W 220M
    IAD   Dulles - Washington-Dulles International Airport  38-56-05N 077-26-51W 93M   
    FCH    Falls Church, VA Erica Page 3/7/94 Windie1970@aol.com HKY  Hickory, NC 
    HAM    Hampton, VA 5NE Dave Kessel 1989 david82@verizon.net ECG  Elizabeth City, NC, 
    LYH     Lynchburg, VA NWS Lynchburg Regional Airport 37-19-15N 079-12-24W 295M ILM     Wilmington, NC NWS New Hanover International Airport 34-16-06N 077-54-22W 9M
    CTR  Winterpock in Chesterfield County, VA Albert Arnold 06/03 FAY  Fayetteville, NC Fayetteville Regional Airport, 34-59-22N 078-52-48W 55M
      GSO   Greensboro, NC NWS Piedmont Triad International Airport 36-05-51N 079-56-37W 275M
    CHT   Chantilly, VA Russ Topping -  12/2006  russ.topping@gmail.com - new location December 2006 HSE    Cape Hatteras, NC  Mitchell Field 35-13-56N 075-27-21W 3M
    HDV    Herndon, VA  Randoplh W. Ashby, 3.3 SM South, Lat: 38.922127, Lon: -77.38015, Elev: 390'. Randolph_Ashby@Raytheon.com LBT    Lumberton, NC  Lumberton Municipal Airport 34-36-26N 079-03-36W 37M
    GAV - Glen Allen, Henrico County, VA - Lowell Koontz  8/1/08  wwkoontz@verizon.net EWN    New Bern, NC  Craven County Regional Airport 36-04-03N 077-02-50W 3M
      MON    Moncure, NC  Chatham County - Mac McIlwain mac.mcilwain@embarqmail.com
      RAL    Raleigh, NC 7NNW  Bob Woodson -  6/1/93 kf4mmm@qsl.net
    LKU     Louisa, VA 1N Joseph Bowers 1944 - NWS ID  44-5050-02 STATION CLOSED RDU   Raleigh-Durham, NC Raleigh-Durham International Airport 35-52-14N 078-47-11W 130M
    LOU     Louisa, VA 6S John Bullock (about 1970) STATION CLOSED ROX    Roxboro, NC 2SE Merriell A. Jay 1/93
         WHI   North Whiteville, NC Christopher Crawley 12/10 34.413744N / 078.751908W
    LYH     Lynchburg, VA NWS Lynchburg Regional Airport 37-19-15N 079-12-24W 295M ILM     Wilmington, NC NWS New Hanover International Airport 34-16-06N 077-54-22W 9M
    NEW    Newmarket, VA 2W Joyce Winfree STATION CLOSED 5/31/10 joywood@shentel.net CHS   Charleston, SC NWS Charleston Air Force Base 32-53-56N 080-02-26W 13M
    NPN     Newport News, VA 7N Gary Leonard -  6/91 GaryMLeonard@aol.com CAE    Columbia, SC NWS Columbia Metropolitan Airport 33-56-31N 081-07-05W 73M 
    NOR     Norfolk, VA 3NE Jim Fentress 6/1/77 FLO    Florence, SC Florence Regional Airport 34-11-16N 079-43-51W 44M
    ORF     Norfolk, VA 5NE 36-54-13N 076-11-31W 14M  1871 GSP   Greenville-Spartanburg, SC NWS Greenville-Spartanburg Airport 34-53-02N 082-13-15W 286M 
    POR     Portsmouth, VA 36.81° North 76.33° West 3S Bill Trotter -  7/1/76 wxr@cox.net CRE    North Myrtle Beach, SC Grand Strand Airport 33-48-42N 078-43-26W 10M
    MEC     Mechanicsville, VA Glen Martin 11/19/91 OGB   Orangeburg, SC  Orangeburg Municipal Airport 33-27-50N 080-51-13W 59M
    FHC    Norfolk, VA  Fred Heutte Center 36° 54'N 76° 16'W 01/01/03 fhcgarden@cox.net AND   Anderson, SC 
    RIC     Richmond, VA Richmond International Airport 37-30-40N 077-19-24W 50M TRI     Tri-cities, TN  (Bristol / Johnson / Kingsport), Tri-City Regional Airport 36-28-47N 082-23-56W 474M 
    ROA    Roanoke, VA Roanoke Regional Airport 37-19-01N 079-58-27W 362M DAV  Davis, WV Dave Lesher canaanwx@canaantv.tv