Climatological Report (Monthly)
Issued by NWS Sterling, VA

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000
CXUS51 KLWX 012117
CLMIAD

CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
517 PM EDT SAT APR 1 2017

...................................

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR THE MONTH OF MARCH 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1962 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE
                                          NORMAL
.............................................................
TEMPERATURE (F)
RECORD
 HIGH              89   03/30/1998
                        03/12/1990
 LOW                    03/04/2014
                        03/15/1993
HIGHEST            78   03/25        77       1
LOWEST             17   03/13        15       2
AVG. MAXIMUM     54.8              55.5    -0.7     62.6
AVG. MINIMUM     33.7              32.9     0.8     38.5
MEAN             44.2              44.2     0.0
DAYS MAX >= 90      0               0.0     0.0
DAYS MAX <= 32      1               0.6     0.4
DAYS MIN <= 32     15              15.2    -0.2
DAYS MIN <= 0       0               0.0     0.0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         7.65   1973
 MINIMUM         0.07   2006
TOTALS           4.12              3.38    0.74     1.45
DAILY AVG.       0.13              0.11    0.02
DAYS >= .01        15              10.5     4.5
DAYS >= .10         7               6.8     0.2
DAYS >= .50         3               2.1     0.9
DAYS >= 1.00        1               0.9     0.1
GREATEST
 24 HR. TOTAL    1.55   03/31 TO 03/31

SNOWFALL (INCHES)
RECORDS
 TOTAL           15.5   1993
TOTALS            5.7               2.8     2.9
SINCE 7/1         7.3              21.7   -14.4
SNOWDEPTH AVG.      0
DAYS >= TRACE       6               1.5     4.5
DAYS >= 1.0         2               0.9     1.1
GREATEST
 SNOW DEPTH         3   03/14
 24 HR TOTAL      4.1

DEGREE_DAYS
HEATING TOTAL     640               647      -7      446
 SINCE 7/1       3533              4237    -704     3537
COOLING TOTAL       2                 3      -1        5
 SINCE 1/1          2                 3      -1        5
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              10.1
HIGHEST WIND SPEED/DIRECTION    37/300    DATE  03/08
HIGHEST GUST SPEED/DIRECTION    47/290    DATE  03/14

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR            6
NUMBER OF DAYS PC             13
NUMBER OF DAYS CLOUDY         12

AVERAGE RH (PERCENT)     56

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              2     MIXED PRECIP               0
HEAVY RAIN                2     RAIN                       4
LIGHT RAIN               15     FREEZING RAIN              1
LT FREEZING RAIN          1     HAIL                       0
HEAVY SNOW                0     SNOW                       3
LIGHT SNOW                6     SLEET                      2
FOG                      14     FOG W/VIS <= 1/4 MILE      0
HAZE                      2

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

&&

WASHINGTON DULLES INTERNATIONAL AIRPORT...

THE MONTHLY AVERAGE TEMPERATURE WAS NEAR NORMAL. MONTHLY
PRECIPITATION AND SNOWFALL WERE SLIGHTLY ABOVE NORMAL.

A RECORD DAILY WARM LOW TEMPERATURE OF 53 DEGREES WAS SET ON THE
1ST...BREAKING THE OLD RECORD OF 43 SET IN 1997.

A RECORD DAILY MAXIMUM SNOWFALL OF 4.1 INCHES WAS SET ON THE
14TH...BREAKING THE PREVIOUS RECORD OF 4.0 SET IN 1999.

A RECORD DAILY COOL HIGH TEMPERATURE OF 31 DEGREES WAS SET ON THE
15TH...BREAKING THE OLD RECORD OF 32 SET IN 1993.

A RECORD DAILY HIGH TEMPERATURE OF 78 DEGREES WAS SET ON THE
25TH...BREAKING THE OLD RECORD OF 76 SET IN 2003...2000...1988 AND
1963.

A RECORD DAILY MAXIMUM RAINFALL OF 1.55 INCHES WAS SET ON THE
31ST...BREAKING THE OLD RECORD OF 0.95 SET IN 1976.

CLIMATE RECORDS AT WASHINGTON DULLES INTERNATIONAL AIRPORT BEGAN IN
NOVEMBER OF 1962.

ALL CLIMATE DATA ARE CONSIDERED PRELIMINARY UNTIL REVIEWED BY THE
NATIONAL CENTERS FOR ENVIRONMENTAL INFORMATION (NCEI).

$$

DH/LFR/BAJ



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