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Climatological Report (Annual)
Issued by NWS Bismarck, ND
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CXUS53 KBIS 011206
CLAISN

CLIMATE REPORT
NATIONAL WEATHER SERVICE WILLISTON ND
557 AM CST SAT JAN 1 2011

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

...THE WILLISTON CLIMATE SUMMARY FOR THE YEAR OF 2010...

CLIMATE NORMAL PERIOD 1971 TO 2000
CLIMATE RECORD PERIOD 1894 TO 2010

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE
                                          NORMAL
.............................................................
TEMPERATURE (F)
RECORD
 HIGH             110   07/05/1936
 LOW              -50   12/23/1983
                        02/16/1936
HIGHEST            97   08/26        MM      MM
                        08/22
LOWEST            -32   01/08        MM      MM
AVG. MAXIMUM     52.2                               51.2
AVG. MINIMUM     29.6                               26.6
MEAN             40.9                40.9    0.00   38.9
DAYS MAX >= 90     14                               14
DAYS MAX <= 32    106                               93
DAYS MIN <= 32    183                              195
DAYS MIN <= 0      44                               60

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        22.04   1896
 MINIMUM         6.13   1934
TOTALS          21.28               14.16    7.12   13.81
DAYS >= .01       117                              101
DAYS >= .10        51                               38
DAYS >= .50        10                                6
DAYS >= 1.00        3                                2
GREATEST
 24 HR. TOTAL    1.74   05/24-25                     1.40

SNOWFALL (INCHES)
RECORDS
 TOTAL           66.2   2003
  (SEASONAL)     94.7   1895-1896
 24 HR TOTAL     15.0   4/13/1986
TOTALS           75.2               43.4    32.2    39.6
SINCE 7/1        54.5                               10.2
DAYS >= TRACE      77                               82
GREATEST
 24 HR TOTAL     14.4   12/10-11                     5.4

DEGREE_DAYS
HEATING TOTAL    9033              9044     -11    9688
 SINCE 7/1       3747              3758     -11    3739
COOLING TOTAL     388               463     -75     296
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              7.9
HIGHEST WIND SPEED/DIRECTION    49/010    DATE  05/24
HIGHEST GUST SPEED/DIRECTION    63/260    DATE  07/12



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

&&

...2010 WAS AVERAGE IN TEMPERATURE AND MUCH WETTER THAN NORMAL...

WILLISTON`S AVERAGE ANNUAL TEMPERATURE FOR 2010 WAS 40.9
DEGREES...WHICH WAS EQUAL TO THE AVERAGE ANNUAL TEMPERATURE. THE
COLDEST MONTH WAS DECEMBER WITH AN AVERAGE TEMPERATURE OF 9.7
DEGREES. THE WARMEST MONTH WAS JULY WITH AN AVERAGE TEMPERATURE OF
69.5 DEGREES. THERE WERE 7 MONTHS WHERE THE AVERAGE TEMPERATURE WAS
ABOVE NORMAL...JANUARY...MARCH...APRIL...JULY...AUGUST...OCTOBER AND
NOVEMBER. THERE WERE 5 MONTHS WHERE THE AVERAGE TEMPERATURE WAS
BELOW NORMAL...FEBRUARY...MAY...JUNE...SEPTEMBER...AND DECEMBER.
FEBRUARY WAS THE ONLY MONTH THAT WAS SIGNIFICANTLY BELOW
NORMAL...WITH AN AVERAGE OF 10.1 DEGREES...WHICH WAS 6.7 DEGREES
BELOW NORMAL. THERE WAS ONLY ONE TEMPERATURE RECORD SET DURING THE
YEAR...WHEN A RECORD LOW OF 23 OCCURRED ON SEPTEMBER 18...BREAKING
THE OLD RECORD OF 28 SET IN 1991.

TOTAL PRECIPITATION FOR 2010 WAS 21.28 INCHES...WHICH WAS 7.12
INCHES ABOVE THE NORMAL OF 14.16 INCHES...AND MADE 2010 THE THIRD
WETTEST YEAR ON RECORD. THE WETTEST MONTH OF THE YEAR WAS MAY WITH
3.94 INCHES...WHICH WAS 2.06 INCHES ABOVE THE NORMAL OF 1.88
INCHES...AND MADE THAT MONTH THE 9TH WETTEST MAY ON RECORD. THERE
WAS 1.95 INCHES OF PRECIPITATION IN DECEMBER...WHICH WAS 1.38 INCHES
ABOVE NORMAL...MAKING THAT MONTH THE SECOND WETTEST DECEMBER ON
RECORD. THE DRIEST MONTH WAS FEBRUARY WHEN ONLY 0.30 INCHES OF
PRECIPITATION FELL WHICH WAS ONLY 0.09 INCHES BELOW NORMAL. NINE
MONTHS RECORDED PRECIPITATION THAT WAS ABOVE NORMAL...WHICH WAS
JANUARY...MAY...JUNE...JULY...AUGUST...SEPTEMBER...OCTOBER...NOVEMBER
AND DECEMBER. ONLY 3 MONTHS WERE DRIER THAN
NORMAL...FEBRUARY...MARCH AND APRIL. SNOWFALL IN NOVEMBER REACHED
15.1 INCHES...WHICH WAS 8.4 INCHES ABOVE THE NORMAL SNOWFALL OF 6.7
INCHES. SNOWFALL FOR DECEMBER REACHED A TOTAL OF 35.3 INCHES...WHICH
WAS 27.1 INCHES ABOVE NORMAL. THIS BROKE THE OLD RECORD FOR SNOWIEST
DECEMBER...WHICH WAS 32.0 INCHES SET IN 2008. SNOWFALL FOR THE
2009-2010 WINTER SEASON WAS 31.3 INCHES...12.1 INCHES BELOW THE
NORMAL OF 43.4 INCHES.

OTHER WEATHER TOTALS FOR THE YEAR...

.HIGHEST PRESSURE...30.85...FEBRUARY 28.
.LOWEST PRESSURE...29.11...APRIL 28.

$$
BPN
National Weather Service Weather Forecast Office
