Climatological Report (Monthly)
Issued by NWS Sterling, VA

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000
CXUS51 KLWX 021743 CCA
CLMIAD

CLIMATE REPORT...CORRECTED
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1243 PM EST TUE FEB 2 2016

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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR THE MONTH OF JANUARY 2016...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1962 TO 2016

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE
                                          NORMAL
.............................................................
TEMPERATURE (F)
RECORD
 HIGH              75   01/29/1975
 LOW              -18   01/22/1984
HIGHEST            60   01/31        63      -3
LOWEST              4   01/25         2       2
AVG. MAXIMUM     41.5              42.5    -1.0     38.1
AVG. MINIMUM     21.4              23.9    -2.5     21.3
MEAN             31.5              33.2    -1.7
DAYS MAX >= 90      0               0.0     0.0
DAYS MAX <= 32      8               5.2     2.8
DAYS MIN <= 32     26              24.3     1.7
DAYS MIN <= 0       0               0.6    -0.6

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         6.61   1979
 MINIMUM         0.40   1981
TOTALS           4.47              2.68    1.79     3.26
DAILY AVG.       0.14              0.09    0.05
DAYS >= .01        11               9.9     1.1
DAYS >= .10         5               5.7    -0.7
DAYS >= .50         4               1.8     2.2
DAYS >= 1.00        2               0.5     1.5
GREATEST
 24 HR. TOTAL    1.88   01/23 TO 01/23

SNOWFALL (INCHES)
RECORDS
 TOTAL           30.9   1996
TOTALS           29.9               7.3    22.6
SINCE 7/1        29.9              11.3    18.6
SNOWDEPTH AVG.      5
DAYS >= TRACE       8               3.5     4.5
DAYS >= 1.0         2               1.9     0.1
GREATEST
 SNOW DEPTH        28   01/24
 24 HR TOTAL     22.1R

DEGREE_DAYS
HEATING TOTAL    1033               986      47     1088
 SINCE 7/1       2286              2784    -498     2899
COOLING TOTAL       0                 0       0        0
 SINCE 1/1          0                 0       0        0
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              8.1
HIGHEST WIND SPEED/DIRECTION    38/290    DATE  01/29
HIGHEST GUST SPEED/DIRECTION    52/300    DATE  01/23

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR           10
NUMBER OF DAYS PC             14
NUMBER OF DAYS CLOUDY          7

AVERAGE RH (PERCENT)     64

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       3
LIGHT RAIN                8     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                1     SNOW                       3
LIGHT SNOW                8     SLEET                      0
FOG                      15     FOG W/VIS <= 1/4 MILE      3
HAZE                      5

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

&&

DULLES INTERNATIONAL AIRPORT...

THE MONTHLY AVERAGE TEMPERATURE WAS BELOW NORMAL. MONTHLY
PRECIPITATION WAS WELL ABOVE NORMAL. MONTHLY SNOWFALL RANKED AS THE
SECOND SNOWIEST JANUARY ON RECORD.

DULLES RECORDED ITS FIRST MEASURABLE SNOWFALL OF THE 2015-16 WINTER
SEASON ON THE 12TH. THIS RANKS AS THE 6TH LATEST FIRST MEASURABLE
SNOWFALL ON RECORD.

A PRELIMINARY RECORD DAILY SNOWFALL OF 22.1 INCHES WAS SET ON THE
23RD...BREAKING THE OLD RECORD OF 1.7 SET IN 1982. THIS IS ALSO THE
RECORD HIGHEST SINGLE DAY SNOWFALL AMOUNT FOR THE ENTIRE MONTH OF
JANUARY...BREAKING THE OLD RECORD OF 19.8 INCHES SET ON JANUARY 7TH
1996.

A PRELIMINARY STORM TOTAL SNOWFALL OF 29.3 INCHES ON THE 22ND-23RD
WOULD RANK AS THE 2ND LARGEST SNOWSTORM ON RECORD AT DULLES.

A RECORD ALL-TIME 7 AM SNOW DEPTH OF 28 INCHES WAS SET ON THE
24TH...BREAKING THE OLD RECORD OF 26 INCHES SET ON FEBRUARY 10TH
2010.

A RECORD DAILY RAINFALL OF 1.00 INCH WAS SET ON THE 10TH...BREAKING
THE OLD RECORD OF 0.93 INCHES SET IN 1965. A RECORD DAILY
PRECIPITATION AMOUNT IN THE FORM OF MELTED SNOW OF 1.88 INCHES WAS
SET ON THE 23RD...BREAKING THE OLD RECORD OF 1.46 INCHES SET IN 1998.

A RECORD DAILY HIGH TEMPERATURE OF 59 DEGREES WAS SET ON THE
10TH...BREAKING THE OLD RECORD OF 58 SET IN 2002.

$$

...CORRECTED FOR MONTHLY SNOWFALL...

DH/SMZ


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