National Weather Service United States Department of Commerce

Heat Continues for the East and South-Central U.S.; Strong to Severe Storms Across the Mid-Atlantic and Northeast

The extremely dangerous heat wave continues across the East Coast and much of the South-Central U.S. today. Record high temperatures are expected for some areas especially across the Mid-Atlantic where extreme heat risk conditions reside. There is a Slight Risk (level 2 of 5) of severe thunderstorms today for the northern Mid-Atlantic into portions of southern New England. Read More >

...1999 WEATHER SUMMARY...
          
JAN...A WARM, UNUSUAL MONTH. AVERAGE MONTHLY TEMPERATURES 10.9
     DEGREES ABOVE NORMAL.  PRECIPITATION AND SNOWFALL WELL
     BELOW  NORMAL.
FEB...ANOTHER WARM, DRY MONTH WITH TEMPERATURES 6.0 DEGREES ABOVE
     NORMAL, AND ONLY A TRACE OF PRECIPITATION OR SNOW.
MAR...WARM TEMPERATURES CONTINUE AS THE AVERAGE MONTHLY
     TEMPERATURE IS 5.0 DEGREES ABOVE NORMAL.  ONLY ONE-HALF OF THE
     NORMAL  PRECIPITATION AND THE 2.8 INCHES OF SNOW IS WELL BELOW
     THE  NORMAL OF 7.0 INCHES.
APR...APRIL SHOWERS..AND SNOW. PRECIPITATION 1.15 INCHES IS WELL
     ABOVE NORMAL OF .49 INCHES.  SNOWFALL OF 7.2 INCHES IS WELL
     ABOVE THE NORMAL OF 4.0 INCHES, AND TEMPERATURES WERE 2.5
     DEGREES BELOW NORMAL FOR A CHANGE.
MAY...AVERAGE MONTHLY TEMPERATURE IS 1.1 DEGREES BELOW NORMAL
     WHILE BOTH PRECIPITATION AND SNOWFALL OF 5.9 INCHES ARE WELL
     ABOVE NORMAL.
JUN...DRY AND COOL, AND NO HELP FOR THE FARMERS.  ONLY .32 INCHES OF
     RAINFALL V/S NORMAL OF .67.  TEMPERATURES STILL AVERAGING\
     BELOW NORMAL. 
JUL...TEMPERATURES WERE NORMAL FOR A CHANGE BUT DRY, WITH ONLY .31
     INCHES OF RAINFALL V/S A NORMAL OF 1.19 INCHES.
AUG...AUGUST TRIES TO MAKE UP FOR BEING DRY EARLIER IN THE YEAR. 
     3.08 INCHES OF RAIN, WELL ABOVE THE NORMAL OF 1.12 INCHES.
SEP...STILL WET WITH 1.09 INCHES OF RAIN (NORMAL IS .89 INCHES)
     AVERAGE MONTHLY TEMPERATURE BELOW NORMAL AGAIN BY 1.4
     DEGREES. PRECIPITATION FOR THE FIRST 9 MONTHS OF THE YEAR TOTALS 
     7.31 INCHES, NORMAL IS 6.00.
OCT...A NORMAL MONTH FOR TEMPERATURES BUT BELOW NORMAL
     PRECIPITATION OF .24 INCHES, (NORMAL .89)  ONLY A TRACE OF SNOW
     FOR THE MONTH.
NOV...WARM AND DRY ONCE AGAIN. TEMPERATURES AVERAGE 2.8 DEGREES
     ABOVE NORMAL BUT ONLY A TRACE OF PRECIPITATION AND SNOWFALL.
DEC...WARM AND DRY. TEMPERATURES AVERAGE 2.6 DEGREES ABOVE
     NORMAL.  HOWEVER, COLDEST DAY OF YEAR, - 10 OCCURRED ON THE
     15TH. TOTAL SNOWFALL OF 0.3 INCHES WAS WELL BELOW NORMAL OF 7.1
     INCHES FOR THE MONTH. ALSO TOTAL SNOWFALL SO FAR THIS SEASON
     OF 0.3 INCHES, WITH NORMAL EXPECTED SNOWFALL 15.5 INCHES FOR
     JULY THROUGH DECEMBER. 

THIS ENDS THE AVERAGE TEMPERATURE FOR THE YEAR AT 42.8 DEGREES,
     SECOND WARMEST OF RECORD. THE WARMEST YEAR WAS 1986, WHEN
     THE AVERAGE TEMPERATURE FOR THE YEAR WAS 43.1.

                        1999   STATISTICS
      Avg    Avg   Mean   Dep fm  Pcpn  Snow    Htg Deg.    Col.Deg
      Max    Min          Normal                 Days        Days   
JAN   44.6   6.5   25.6   +10.9    .07   1.6     1217           0 
FEB   49.2   7.6   28.4   + 6.0      T     T     1018           0
MAR   56.6  18.0   37.3   + 5.0    .22   2.8      851           0
APR   55.8  21.5   38.6   + 5.0   1.15   7.2      784           0
MAY   65.5  33.0   49.3   - 1.1   1.07   5.9      485           0
JUN   77.1  38.9   58.0   - 1.4    .32     0      206           2
JUL   80.3  49.0   64.7   - 0.2    .31     0       30          28
AUG   76.8  48.5   62.7   + 0.3   3.08     0       99           3
SEP   71.1  35.7   53.4   - 1.4   1.09     0      339           0
OCT   65.5  20.9   43.2   - 0.3    .24     T      667           0
NOV   55.6   9.8   32.7   + 2.8      T     T      962           0
DEC   39.5   0.6   20.1   + 2.6    .03    .3     1388           0    

       
      
MEAN  61.5  24.2   42.8   TOTALS  7.58  17.8     8013          33

AVERAGE MAXIMUM TEMPERATURE FOR THE YEAR     61.5     NORMAL 58.5    
AVERAGE MINIMUM TEMPERATURE FOR THE YEAR     24.2     NORMAL 23.4
AVERAGE TEMPERATURE FOR THE YEAR             42.8     NORMAL 41.1
HIGHEST TEMPERATURE WAS   91 on July 1st
LOWEST  TEMPERATURE WAS   -4 on January 3rd

DAYS WITH MAX 90 OR HIGHER        1      NORMAL    1
DAYS WITH MAX 32 OR LOWER         7      NORMAL   36
DAYS WITH MIN  32 OR LOWER      226      NORMAL  227
DAYS WITH MIN ZERO OR LOWER      28      NORMAL   50 


...PRECIPITATION...

TOTAL     7.58  INCHES                   NORMAL  7.57  INCHES
MOST IN 24 HOURS WAS    .79   INCHES ON APRIL 30TH
DAYS WITH MEASURABLE PRECIPITATION  73   NORMAL   70
DAYS WITH THUNDERSTORMS             94   NORMAL   44
DAYS WITH HAIL                       1    


SNOWFALL TOTAL FOR THE YEAR 17.8  INCHES NORMAL   37.4  INCHES
MOST SNOW IN 24 HOURS WAS  4.5 INCHES ON APRIL 30TH 
GREATEST SNOW DEPTH WAS      2  INCHES ON MAY 2ND 

...WIND...

AVERAGE WIND SPEED    7.6  MPH           NORMAL    6.8  MPH
PEAK WIND GUST  SOUTHWEST  75 MPH ON  APRIL 9TH   

DAYS WITH HEAVY FOG     17     NORMAL      20
HEATING DEGREE DAYS   8013     NORMAL    8749
COOLING DEGREE DAYS     33     NORMAL      62
HIGHEST PRESSURE FOR THE YEAR   30.98 ON 24 DECEMBER
LOWEST  PRESSURE FOR THE YEAR   29.34 ON  3 MAY