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000
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