387 CXUS51 KLWX 040001 CLMDCA CLIMATE REPORT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 800 PM EDT FRI MAY 3 2013 ................................... ...THE WASHINGTON NATIONAL DC CLIMATE SUMMARY FOR THE MONTH OF APRIL 2013... CLIMATE NORMAL PERIOD 1981 TO 2010 CLIMATE RECORD PERIOD 1871 TO 2013 WEATHER OBSERVED NORMAL DEPART LAST YEAR'S VALUE DATE(S) VALUE FROM VALUE NORMAL ............................................................. TEMPERATURE (F) RECORD HIGH 95 04/17/2002 04/18/1976 04/23/1960 LOW 15 04/01/1923 HIGHEST 91 04/10 86 5 LOWEST 31 04/04 33 -2 AVG. MAXIMUM 68.9 66.6 2.3 68.1 AVG. MINIMUM 48.9 47.0 1.9 48.5 MEAN 58.9 56.8 2.1 DAYS MAX >= 90 1 0.3 0.7 DAYS MAX <= 32 0 0.0 0.0 DAYS MIN <= 32 1 0.5 0.5 DAYS MIN <= 0 0 0.0 0.0 PRECIPITATION (INCHES) RECORD MAXIMUM 9.13 1889 MINIMUM 0.03 1985 TOTALS 2.76 3.06 -0.30 1.92 DAILY AVG. 0.09 0.10 -0.01 DAYS >= .01 9 10.4 -1.4 DAYS >= .10 5 6.5 -1.5 DAYS >= .50 2 2.2 -0.2 DAYS >= 1.00 1 0.6 0.4 GREATEST 24 HR. TOTAL 1.38 04/19 TO 04/20 SNOWFALL (INCHES) RECORDS TOTAL 5.5 1924 TOTALS 0.0 T 0.0 SINCE 7/1 3.1 15.4 -12.3 SNOWDEPTH AVG. 0 DAYS >= TRACE 0 0.1 -0.1 DAYS >= 1.0 0 0.0 0.0 GREATEST SNOW DEPTH 0 24 HR TOTAL 0.0 DEGREE_DAYS HEATING TOTAL 217 270 -53 220 SINCE 7/1 3682 3946 -264 3041 COOLING TOTAL 41 24 17 27 SINCE 1/1 41 26 15 50 .............................................................. WIND (MPH) AVERAGE WIND SPEED 9.2 HIGHEST WIND SPEED/DIRECTION 43/240 DATE 04/19 HIGHEST GUST SPEED/DIRECTION 53/250 DATE 04/19 SKY COVER POSSIBLE SUNSHINE (PERCENT) MM AVERAGE SKY COVER 0.60 NUMBER OF DAYS FAIR 4 NUMBER OF DAYS PC 14 NUMBER OF DAYS CLOUDY 12 AVERAGE RH (PERCENT) 57 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 2 MIXED PRECIP 0 HEAVY RAIN 2 RAIN 2 LIGHT RAIN 13 FREEZING RAIN 0 LT FREEZING RAIN 0 HAIL 0 HEAVY SNOW 0 SNOW 0 LIGHT SNOW 0 SLEET 0 FOG 8 FOG W/VIS <= 1/4 MILE 1 HAZE 5 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. && AFTER TWO STRAIGHT MONTHS OF BELOW NORMAL TEMPERATURES...THE MONTHLY AVERAGE TEMPERATURE FOR APRIL WAS AROUND TWO DEGREES ABOVE THE 1981-2010 NORMAL. THE PAST SIX YEARS HAVE FEATURED ABOVE NORMAL TEMPERATURES FOR APRIL. HOWEVER...THE MONTH ENDED ON A COOL NOTE AS 9 OF THE LAST 11 DAYS RECORDED BELOW NORMAL AVERAGE TEMPERATURES. A SUMMER-LIKE PERIOD FROM THE 8TH-11TH FEATURED FOUR STRAIGHT DAYS OF AT LEAST 80 DEGREES. 2013 WAS ONLY THE SIXTH YEAR ON RECORD WITH AT LEAST FOUR CONSECUTIVE 80-DEGREE DAYS THROUGH THE FIRST HALF OF APRIL. THE HIGH TEMPERATURE OF 91 DEGREES ON THE 10TH SET A DAILY RECORD HIGH FOR WASHINGTON DC. IT BROKE THE OLD RECORD OF 89 SET IN 1922. RAINFALL FOR THE MONTH WAS SLIGHTLY BELOW NORMAL. HALF OF THE MONTHLY PRECIPITATION FELL ON THE 19TH. A 53 MPH WIND GUST WAS RECORDED ON THE 19TH WHEN A THUNDERSTORM MOVED THROUGH THE NATIONAL AIRPORT. $$ JRK/SMZ