Bismarck and Williston April Climate Summaries

...THE BISMARCK CLIMATE SUMMARY FOR THE

MONTH OF APRIL 2009...

CLIMATE NORMAL PERIOD 1971 TO 2000
CLIMATE RECORD PERIOD 1875 TO 2009

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
HIGH              93   04/30/1992
                        04/21/1980
LOW              -12   04/01/1975
HIGHEST            80   04/23                         85  04/15
LOWEST              6   04/02                          9  04/07
AVG. MAXIMUM     51.8              55.9    -4.1     57.0
AVG. MINIMUM     30.6              30.6     0.0     26.6
MEAN             41.2              43.3    -2.1     41.8
DAYS MAX >= 90      0               0.1    -0.1        0
DAYS MAX <= 32      2               1.0     1.0        0
DAYS MIN <= 32     15              17.6    -2.6       23
DAYS MIN <= 0       0               0.2    -0.2        0

PRECIPITATION (INCHES)
RECORD
MAXIMUM         5.71   1878
MINIMUM         0.00   1952
TOTALS           0.69              1.46   -0.77     0.73
DAILY AVG.       0.02              0.05   -0.03     0.02
DAYS >= .01         6               8.1    -2.1        5
DAYS >= .10         2               3.9    -1.9        2
DAYS >= .50         0               0.7    -0.7        0
DAYS >= 1.00        0               0.2    -0.2        0
GREATEST
24 HR. TOTAL    0.38   04/26 TO 04/26              0.40
                        04/25 TO 04/26
                        04/26 TO 04/26

SNOWFALL (INCHES)
RECORDS
TOTAL           18.7   1984


TOTALS            0.1               4.0    -3.9        T
SINCE 7/1       100.3              50.0    50.3     18.8
SNOWDEPTH AVG.      3                MM      MM        0
DAYS >= 1.0         0               1.0    -1.0        0
GREATEST
SNOW DEPTH        16   04/01                          0  MM
24 HR TOTAL      0.1   04/24                          T

DEGREE_DAYS
HEATING TOTAL     707               660      47
SINCE 7/1       8834              8404     430
COOLING TOTAL       0                 2      -2
SINCE 1/1          0                 2      -2
.................................................................

WIND (MPH)
HIGHEST WIND SPEED/DIRECTION    38/150    DATE  04/15
HIGHEST GUST SPEED/DIRECTION    46/160    DATE  04/15

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   55
NUMBER OF DAYS FAIR           15
NUMBER OF DAYS PC              8
NUMBER OF DAYS CLOUDY          7


WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       2
LIGHT RAIN               11     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                3     SLEET                      0
FOG                      12     FOG W/VIS <= 1/4 MILE      2
HAZE                      3

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

$$

...COOL AND DRY SUMMARIZES THE MONTH OF APRIL AT BISMARCK...

DURING THE MONTH OF APRIL...THE MONTHLY AVERAGE TEMPERATURE WAS
41.2 DEGREES...WHICH WAS 2.1 DEGREES BELOW THE 1971 TO 2000 AVERAGE.
THIS RATES AS BEING THE 43RD COLDEST APRIL IN RECORDED HISTORY. IN
SPITE OF THIS...A PATTERN CHANGE DURING THE MIDDLE OF THE MONTH
BROUGHT A WELCOME WARM SPRINGLIKE PATTERN TO THE AREA. TEMPERATURES
JUMPED FROM THE 30S AND 40S DURING THE FIRST WEEK AND A HALF OF
APRIL...TO THE 60S AND 70S DURING THE SECOND AND THIRD WEEKS.
UNFORTUNATELY...THIS QUICK WARM UP LEAD TO A RAPID SNOWMELT AND
ULTIMATELY A SECOND RECORD CREST ON MANY AREA SMALL STREAMS AND
RIVERS. THE WARMEST TEMPERATURE FOR THE MONTH OCCURRED ON THE
23...WHEN THE MERCURY TOPED 80 DEGREES. NO RECORD TEMPERATURES WERE
BROKEN DURING THE MONTH.

FORTUNATELY FOR FLOODING CONCERNS PRECIPITATION DURING THE MONTH WAS
BELOW AVERAGE. THERE WAS A TOTAL OF ONLY 69 HUNDREDTHS OF AN INCH
RECORDED DURING THE MONTH. THIS RATES APRIL 2009 AS BEING THE 37TH
DRIEST APRIL IN RECORDED HISTORY.

...THE WILLISTON CLIMATE SUMMARY FOR THE

MONTH OF APRIL 2009...

CLIMATE NORMAL PERIOD 1971 TO 2000
CLIMATE RECORD PERIOD 1894 TO 2009

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
HIGH              92   04/21/1980
                        04/20/1980
LOW              -15   04/02/1975
HIGHEST            80   04/22                         82  04/14
LOWEST             15   04/01                         12  04/06
AVG. MAXIMUM     52.9              56.0    -3.1     56.4
AVG. MINIMUM     29.8              29.1     0.7     26.5
MEAN             41.3              42.5    -1.2     41.4
DAYS MAX >= 90      0               0.1    -0.1        0
DAYS MAX <= 32      0               1.1    -1.1        0
DAYS MIN <= 32     18              17.4     0.6       24
DAYS MIN <= 0       0               0.2    -0.2        0

PRECIPITATION (INCHES)
RECORD
MAXIMUM         3.31   1967
MINIMUM            T   1931
TOTALS           1.04              1.05   -0.01     0.27
DAILY AVG.       0.03              0.04   -0.01     0.01
DAYS >= .01         9               8.1     0.9        6
DAYS >= .10         3               2.8     0.2        0
DAYS >= .50         0               0.4    -0.4        0
DAYS >= 1.00        0               0.1    -0.1        0
GREATEST
24 HR. TOTAL    0.59   04/28 TO 04/29              0.18

SNOWFALL (INCHES)
RECORD
MAXIMUM           26.6   1896
MIMIMUM            0     1981
TOTALS            0.8               3.7    -2.9        T
SINCE 7/1        70.0              42.5    27.5     14.9
SNOWDEPTH AVG.      0                MM      MM        0
DAYS >= 1.0         0               1.1    -1.1        0
GREATEST
SNOW DEPTH         T   23                             T  24
24 HR TOTAL      0.6   24                             T

DEGREE_DAYS
HEATING TOTAL     704               660      44
SINCE 7/1       9172              8614     558
COOLING TOTAL       0                 1      -1
SINCE 1/1          0                 1      -1
.................................................................

WIND (MPH)
HIGHEST WIND SPEED/DIRECTION    30/360    DATE  04/23
HIGHEST GUST SPEED/DIRECTION    39/320    DATE  04/19

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   51
NUMBER OF DAYS FAIR           15
NUMBER OF DAYS PC              8
NUMBER OF DAYS CLOUDY          7


WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       3
LIGHT RAIN               12     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       2
LIGHT SNOW                6     SLEET                      0
FOG                      11     FOG W/VIS <= 1/4 MILE      1
HAZE                      1

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

$$

MONTHLY CLIMATE SUMMARY
NATIONAL WEATHER SERVICE WILLISTON ND
245 AM CDT FRI MAY 1 2009

...APRIL 2009 WAS SLIGHTLY COOLER THAN NORMAL WITH NEAR NORMAL
PRECIPITATION...

THE AVERAGE TEMPERATURE FOR APRIL WAS 41.3 DEGREES WHICH IS 1.2
DEGREES BELOW THE NORMAL OF 42.5  DEGREES. THE HIGHEST TEMPERATURE
WAS 80 DEGREES REACHED ON THE 22ND. THE LOWEST TEMPERATURE FOR THE
MONTH WAS 15 DEGREES ON THE 1ST. THERE WERE NO TEMPERATURE RECORDS
SET FOR THE MONTH.

APRIL 2009 WAS NEAR THAN NORMAL WITH A TOTAL OF 1.04 INCHES OF
PRECIPITATION FALLING FOR THE MONTH. THIS WAS 0.01 INCHES BELOW THE
NORMAL OF 1.05 INCHES. THE GREATEST AMOUNT OF PRECIPITATION DURING A
24 HOUR PERIOD OCCURRED ON THE 28TH THROUGH THE 29TH WHEN 0.59
INCHES OF PRECIPITATION FELL. THERE WERE NO PRECIPITATION OR
SNOWFALL RECORDS SET FOR THE MONTH. WILLISTON AIRPORT SAW A TOTAL OF
0.8 INCHES OF SNOWFALL FOR THE MONTH WHICH IS 2.9 INCHES BELOW THE
AVERAGE OF 3.7 INCHES. THE GREATEST AMOUNT OF SNOW THAT FELL DURING
A 24 HOUR PERIOD OCCURRED ON THE 23RD WHEN WILLISTON RECEIVED 0.6
INCHES OF SNOW. AT LEAST A TRACE OF PRECIPITATION FELL ON 15 DAYS
WITH 0.01 INCHES OR MORE FALLING ON 9 DAYS AND AT LEAST 0.10 INCHES
OR MORE FELL ON 3 DAYS. LIGHT SNOW WAS REPORTED ON 6 DAYS WITH
MODERATE SNOWFALL OCCURRING ON 2 DAYS. LIGHT RAIN OCCURRED ON 12
DAYS WITH MODERATE RAIN REPORTED ON 3 DAYS. FOG WAS REPORTED ON 11
DAYS. HAZE WAS REPORTED ON 1 DAY.

THE AVERAGE WIND SPEED FOR THE MONTH WAS 9.2 MPH. THE WINDIEST DAY
FOR THE MONTH WAS THE 29TH WITH AN AVERAGE WIND SPEED OF 19.1 MPH.
ON THE 23RD A MAX SUSTAINED WIND SPEED OF 30 MPH FROM THE NORTH WAS
REPORTED. A PEAK GUST OF 39 MPH FROM THE NORTHWEST OCCURRED ON THE
19TH. THERE WERE 704 HEATING DEGREE DAYS FOR THE MONTH WHICH WAS 44
ABOVE THE NORMAL OF 660. THE SEASONAL HEATING DEGREE DAY TOTAL FOR
THE YEAR IS 9172 WHICH IS 558 ABOVE THE NORMAL OF 8614. THERE WERE 0
COOLING DEGREE DAYS FOR THE MONTH WHICH IS 1 DEGREE BELOW NORMAL.
WILLISTON RECORDED A TOTAL OF 12525 MINUTES OF SUNSHINE WHICH WAS 51
PERCENT OF THE 24674 MINUTES THAT WERE POSSIBLE. THE HIGHEST
BAROMETRIC PRESSURE FOR THE MONTH WAS 30.65 INCHES ON THE 6TH AND
THE LOWEST PRESSURE WAS 29.48 INCHES RECORDED ON THE 22ND.

THE OUTLOOK FOR MAY...NORMAL HIGHS FOR THE MONTH START OUT IN THE
LOWER TO MID 60S AND RISE INTO THE LOWER TO MID 70S BY MONTHS END.
NORMAL LOWS BEGIN IN THE MID 30S AND WARM TO THE MID 40S BY THE END
OF THE MONTH. NORMAL PRECIPITATION IS 1.88 INCHES AND NORMAL
SNOWFALL IS 0.9 INCHES. BELOW NORMAL TEMPERATURES AND NEAR NORMAL
PRECIPITATION ARE EXPECTED IN MAY.



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