000 CDUS41 KLWX 210517 CLIIAD CLIMATE REPORT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1217 AM EST FRI DEC 21 2007 ................................... ...THE WASHINGTON DULLES CLIMATE SUMMARY FOR DECEMBER 20 2007... CLIMATE NORMAL PERIOD 1971 TO 2000 CLIMATE RECORD PERIOD 1962 TO 2007 WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST VALUE (LST) VALUE VALUE FROM YEAR NORMAL .................................................................. TEMPERATURE (F) YESTERDAY MAXIMUM 46 158 PM 64 1988 45 1 48 MINIMUM 25 444 AM 8 1991 25 0 24 AVERAGE 36 35 1 36 PRECIPITATION (IN) YESTERDAY 0.00 0.66 1973 0.10 -0.10 0.00 MONTH TO DATE 2.05 2.00 0.05 0.16 SINCE DEC 1 2.05 2.00 0.05 0.16 SINCE JAN 1 27.08 40.73 -13.65 44.40 SNOWFALL (IN) YESTERDAY 0.0 0.1 -0.1 MONTH TO DATE 2.5 1.1 1.4 SINCE JUL 1 2.5 2.0 0.5 SNOW DEPTH 0 DEGREE DAYS HEATING YESTERDAY 29 30 -1 29 MONTH TO DATE 554 543 11 459 SINCE DEC 1 554 543 11 459 SINCE JUL 1 1283 1520 -237 1320 COOLING YESTERDAY 0 0 0 0 MONTH TO DATE 0 0 0 0 SINCE DEC 1 0 0 0 0 SINCE JAN 1 1593 1075 518 1256 .................................................................. WIND (MPH) HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION NW (330) HIGHEST GUST SPEED 54 HIGHEST GUST DIRECTION SE (150) AVERAGE WIND SPEED 3.1 SKY COVER POSSIBLE SUNSHINE MM AVERAGE SKY COVER 0.4 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. FOG HAZE RELATIVE HUMIDITY (PERCENT) HIGHEST 88 400 AM LOWEST 40 200 PM AVERAGE 64 .......................................................... THE WASHINGTON DULLES CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 44 60 1971 MINIMUM TEMPERATURE (F) 25 4 1989 SUNRISE AND SUNSET DECEMBER 21 2007......SUNRISE 725 AM EST SUNSET 451 PM EST DECEMBER 22 2007......SUNRISE 725 AM EST SUNSET 451 PM EST - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$