PUBLIC INFORMATION STATEMENT - 1999 YEAR END REVIEW NATIONAL WEATHER
SERVICE BALTIMORE/WASHINGTON 900 AM EST SAT JAN 1 2000
..1999...ANOTHER WARM YEAR...
1999 WAS WARMER AND WETTER THAN NORMAL ACROSS THE AREA. HOWEVER...
1999 WAS COOLER THAN 1998. 1999 WAS ALSO WETTER THAN 1998.
AT NATIONAL AIRPORT...THE AVERAGE TEMPERATURE FOR 1999 WAS IN THE TOP
TEN WARMEST YEARS ON RECORD. 4 YEARS OF THE 1990'S WILL GO DOWN IN THE
HISTORY BOOKS AS BEING IN THE TOP TEN WARMEST YEARS ON RECORD AT
WASHINGTON DC.
WARMEST YEARS ON RECORD IN WASHINGTON DC... (RECORDS BEGAN IN WASHINGTON
DC IN 1870)
60.2 DEGREES 1991
60.0 DEGREES 1998 & 1990
59.5 DEGREES 1980
59.4 DEGREES 1975
59.3 DEGREES 1973
59.0 DEGREES 1949, 1981,
58.9 DEGREES 1999, 1953, 1959
AT WASHINGTON DULLES AIRPORT...1999 WAS IN THE TOP FIVE WARMEST YEARS ON
RECORD.
WARMEST YEARS ON RECORD AT WASHINGTON DULLES... (RECORDS BEGAN AT DULLES
AIRPORT IN 1963)
57.1 DEGREES 1998
57.0 DEGREES 1990
56.7 DEGREES 1991
55.2 DEGREES 1999 & 1973
ON A SIDE NOTE...THE LOWEST TEMPERATURE FOR WASHINGTON DC FOR 1999 WAS
20 DEGREES OCCURRING ON FEBRUARY 23RD AND MARCH 8TH. SINCE 1870...THERE
HAS ONLY BEEN ONE OTHER YEAR (SINCE 1870) IN WHICH THE LOWEST
TEMPERATURE FOR THE YEAR WAS WARMER AND ONE OTHER YEAR WHEN IT TIED.
THOSE YEARS WERE 1949 AND 1956. IN 1949 THE LOWEST TEMPERATURE WAS 21
DEGREES OCCURRING ON DECEMBER 17TH. IN 1956...THE LOWEST TEMPERATURE
WAS 20 DEGREES SET NOVEMBER 24TH.
AFTER A DRY SPRING...THE AREA FELL INTO A SEVERE TO EXTREME DROUGHT
DURING THE SUMMER MONTHS. THE DROUGHT WAS BROKEN IN SEPTEMBER AS THE
REMAINS OF TROPICAL CYCLONES DENNIS AND FLOYD BROUGHT BENEFICIAL
RAINFALL TO THE AREA.
SNOWFALL FOR 1999 WAS BELOW NORMAL FOR THE THIRD YEAR IN A ROW. THE LAST
TIME WE SAW ABOVE NORMAL SNOWFALL WAS IN 1996. THE AREA DID SEE ONE
SNOWSTORM. IT CAME LATE IN THE WINTER ON MARCH 9TH...DUMPING 5 TO 10
INCHES OF SNOW ON THE AREA. IT HAD BEEN 3 YEARS SINCE WE HAD THAT MUCH
SNOWFALL.
HERE ARE THE STATISTICS...
..1999 WEATHER SUMMARY FOR WASHINGTON DC (DCA)....
AVG AVG MO DEP PCPN DEP SNOW DEP MAX MIN
MAX MIN AVG TEMP TEMP
JAN 46.4 29.9 38.2 +3.6 5.42 +2.70 2.2 -4.0 71 16
FEB 49.3 32.6 41.0 +3.5 2.54 -0.17 0.2 -6.1 74 20
MAR 53.4 35.5 44.5 -2.7 3.87 +0.70 8.7 +7.1 76 20
APR 66.4 46.6 56.5 0.0 2.09 -0.62 0 0 85 41
MAY 77.9 56.7 67.3 +0.9 1.28 -2.38 0 0 92 47
JUN 83.6 65.7 74.7 -0.9 2.26 -1.12 0 0 98 57
JUL 92.8 73.1 83.0 +3.0 1.01 -2.79 0 0 103 63
AUG 88.8 70.5 79.7 +1.2 5.02 +1.11 0 0 99 62
SEP 77.7 62.3 70.0 -1.3 10.27 +6.96 0 0 86 48
OCT 65.9 48.4 57.2 -2.5 2.16 -0.86 0 0 79 39
NOV 61.8 44.4 53.1 +3.3 1.82 -1.30 0 0 76 31
DEC 49.4 34.5 42.0 +2.6 2.49 -0.63 T -3.1 68 21
1999 67.8 50.0 58.9 +0.9 40.23 +1.60 11.1 -7.1 103 20
DATE====================> 7/6 2/23 & 3/8
..1999 WEATHER SUMMARY FOR BALTIMORE MD (BWI)...
AVG AVG MO DEP PCPN DEP SNOW DEP MAX MIN
MAX MIN AVG TEMP TEMP
JAN 44.6 25.5 35.1 +3.3 4.70 +1.65 4.0 -2.6 68 7
FEB 47.3 27.9 37.6 +2.8 2.65 -0.47 0.6 -7.0 73 16
MAR 51.5 32.1 41.8 -2.3 3.46 +0.08 7.6 +4.6 74 18
APR 64.3 42.0 53.2 -0.2 2.27 -0.82 0 -0.1 83 32
MAY 76.5 51.8 64.2 +0.8 1.73 -1.99 0 0 91 42
JUN 81.9 61.1 71.5 -1.0 2.04 -1.63 0 0 97 50
JUL 91.4 68.5 80.0 +3.0 2.06 -1.63 0 0 102 57
AUG 85.7 65.7 75.7 +0.1 6.14 +2.22 0 0 96 54
SEP 77.0 59.3 68.2 -0.3 11.50 +8.09 0 0 85 45
OCT 65.5 42.3 53.9 -2.7 2.48 +0.50 0 0 79 34
NOV 60.1 39.8 49.9 +3.1 1.95 -1.37 0 -1.1 75 24
EC 48.5 29.7 39.1 +2.4 2.96 -0.45 T -3.6 68 14
1999 66.2 45.5 55.9 +0.8 43.94 +3.18 12.6 -9.4 102 7
DATE===========================> 7/5 1/6
..1999 WEATHER SUMMARY FOR WASHINGTON DULLES (IAD)...
AVG AVG MO DEP PCPN DEP SNOW DEP MAX MIN
MAX MIN AVG TEMP TEMP
JAN 45.1 24.8 35.0 +4.4 5.39 +2.69 4.1 -3.2 71 4 FEB 48.0
26.9 37.5 +3.9 2.62 -0.19 0.9 -6.1 74 16 MAR 51.6 31.1 41.4
-1.8 3.44 +0.27 14.6 -11.7 74 17
APR 65.8 40.1 53.0 +0.3 2.68 -0.43 0 -0.3 85 31
MAY 76.5 49.1 62.8 +0.6 2.22 -1.80 0 0 90 39
JUN 82.1 59.5 70.8 -0.2 3.00 -0.92 0 0 96 48
JUL 90.9 66.0 78.5 +2.9 2.56 -0.93 0 0 99 54
AUG 87.5 63.2 75.4 +1.2 5.43 +1.49 0 0 97 51
SEP 77.2 56.8 67.0 -0.1 9.32 +5.96 0 0 86 40
OCT 65.6 40.5 53.1 -2.0 2.56 -0.64 0 0 78 32
NOV 61.2 38.9 50.0 +4.6 1.72 -1.58 0 0 74 26 DEC 48.2
28.2 38.2 +2.8 2.67 -0.28 0.2 -3.7 67 12
1999 66.6 43.8 55.2 +1.4 43.61 +3.37 19.6 -3.1 99 4
DATE============================> 7/6 1/6
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