Spring 2010 Climate Summary

Bismarck

…16^th warmest and 12^th wettest spring on record…

Temperatures during the 2010 spring season (defined as the months of March-April-May) at the Bismarck airport averaged 45.2 degrees, which was 2.2 degrees above the 1971 to 2000 climatological average. Overall, the spring of 2010 will go down in the books as being tied with the spring season of 1994 for the 16^th warmest on record. This occurred in spite of the fact that during May temperatures were 1.8 degrees below average. It was during the preceding months of March and April when warm conditions prevailed. These months ranked as the 21^st and 20^th warmest on record, respectively.

The daily temperatures ranged from 90 degrees on the 28^th of May to zero degrees on the 1^st of March. There were a total of 7 days in which the mercury never broke the freezing mark. On average, this feat is achieved on about 10 days during the spring season.

Precipitation during the season (including rain and liquid from snowfall) totaled 7.19 inches, which was 156% of average, and ranked the spring of 2010 as the 12^th wettest on record.

...THE BISMARCK ND CLIMATE SUMMARY FOR THE SEASON, FROM 3/1/2010 TO
5/31/2010...

CLIMATE NORMAL PERIOD 1971 TO 2000
CLIMATE RECORD PERIOD 1875 TO 2010

WEATHER         OBSERVED          NORMAL DEPART LAST YEAR`S
                 VALUE   DATE(S) VALUE   FROM    VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
HIGH             102   05/30/1934
                        05/28/1934
LOW              -36   03/15/1897
HIGHEST            90   05/28        MM      MM       85 05/18
LOWEST              0   03/01        MM      MM      -18 03/12
                                                          03/01
AVG. MAXIMUM     56.4              55.1     1.3     50.3
AVG. MINIMUM     34.1              33.8     0.3     27.7
MEAN             45.2              43.0     2.2     39.0
DAYS MAX >= 90      1               0.6     0.4        0
DAYS MAX <= 32      7              10.0    -3.0       16
DAYS MIN <= 32     38              49.6   -11.6       49
DAYS MIN <= 0       1               3.3    -2.3        8

PRECIPITATION (INCHES)

TOTALS           7.19              4.62    2.57     5.44

DAYS >= .01        30              25.7     4.3       21
DAYS >= .10        15              11.4     3.6       11
DAYS >= .50         6               2.3     3.7        4
DAYS >= 1.00        1               0.6     0.4        1
GREATEST
24 HR. TOTAL    1.54

SNOWFALL (INCHES)

TOTALS            9.2              13.3

DEGREE_DAYS
HEATING TOTAL    1823
COOLING TOTAL      25
.................................................................

WIND (MPH)
HIGHEST WIND SPEED/DIRECTION    40/170    DATE 04/13
HIGHEST GUST SPEED/DIRECTION    53/250    DATE 05/25

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
NUMBER OF DAYS FAIR           43
NUMBER OF DAYS PC             22
NUMBER OF DAYS CLOUDY         27

AVERAGE RH (PERCENT)     69

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              5     MIXED PRECIP               0
HEAVY RAIN                4     RAIN                       9
LIGHT RAIN               39     FREEZING RAIN              0
LT FREEZING RAIN          1     HAIL                       1
HEAVY SNOW                0     SNOW                       1
LIGHT SNOW               14     SLEET                      3
FOG                      46     FOG W/VIS <= 1/4 MILE     10
HAZE                     15

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

Williston

…31^st warmest and 18^th wettest spring on record…

Temperatures during the 2010 spring season (defined as the months of March-April-May) at the Williston airport averaged 43.2 degrees, which was 1.3 degrees above the 1971 to 2000 climatological average. Overall, the spring of 2010 will go down in the books as being tied with the spring season of 1968 for the 31^st warmest on record dating back to 1894. This occurred in spite of the fact that during May temperatures were 3.3 degrees below average. It was during the preceding months of March and April when warm conditions prevailed. These months ranked as the 21^st and 32^nd warmest on record, respectively.

The daily temperatures ranged from 83 degrees on the 18^th of May to 14 degrees on the 1^st of March. There were a total of 9 days in which the mercury never broke the freezing mark.

Precipitation during the season (including rain and liquid from snowfall) totaled 5.26 inches, which was 143% of average, and ranked the spring of 2010 as being tied with 1941 and 1978 as being the 18^th wettest on record.

...THE WILLISTON ND CLIMATE SUMMARY FOR THE SEASON, FROM
3/1/2010 TO 5/31/2010...

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 DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
HIGH             106   05/22/1980
LOW              -35   03/14/1897
HIGHEST            83   05/18        MM      MM       84 05/30
LOWEST             14   03/01        MM      MM      -21 03/11
AVG. MAXIMUM     54.9              54.8     0.1     50.5
AVG. MINIMUM     31.4              29.1     2.3     25.4
MEAN             43.2              41.9     1.3     37.9
DAYS MAX >= 90      0               1.0    -1.0        0
DAYS MAX <= 32      9               9.2    -0.2       13
DAYS MIN <= 32     49              50.1    -1.1       58
DAYS MIN <= 0       0               3.6    -3.6        8

PRECIPITATION (INCHES)

TOTALS           5.26              3.67    1.59     1.78

DAYS >= .01        26              25.9     0.1       19
DAYS >= .10        13              10.3     2.7        5
DAYS >= .50         2               1.5     0.5        0
DAYS >= 1.00        1               0.4     0.6        0
GREATEST
24 HR. TOTAL    1.74

SNOWFALL (INCHES)

TOTALS            1.4              12.0

DEGREE_DAYS
HEATING TOTAL    1997
COOLING TOTAL      11
.................................................................

WIND (MPH)
HIGHEST WIND SPEED/DIRECTION    49/010    DATE 05/24
HIGHEST GUST SPEED/DIRECTION    62/010    DATE 05/24

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   60
NUMBER OF DAYS FAIR           42
NUMBER OF DAYS PC             23
NUMBER OF DAYS CLOUDY         27

AVERAGE RH (PERCENT)     67

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              5     MIXED PRECIP               0
HEAVY RAIN                3     RAIN                      14
LIGHT RAIN               36     FREEZING RAIN              0
LT FREEZING RAIN          2     HAIL                       1
HEAVY SNOW                0     SNOW                       3
LIGHT SNOW               10     SLEET                      0
FOG                      41     FOG W/VIS <= 1/4 MILE      8
HAZE                      6

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

Dickinson

Temperatures during the 2010 spring season (defined as the months of March-April-May) at the Dickinson airport averaged 41.4 degrees, which was slightly below the 1971 to 2000 climatological average. Overall, the spring of 2010 will go down in the books as being tied with 1969 for the 48^th warmest on record dating back to 1893. This occurred in spite of the fact that during May temperatures were 4.6 degrees below average, ranking it as the 26^th coolest on record. Temperatures during the preceding months of March and April were near to above average.

The daily temperatures ranged from 79 degrees on the 28^th and 27^th of May to 9 degrees on the 12^th of March. There were a total of 11 days in which the mercury never broke the freezing mark.

Precipitation during the season (including rain and liquid from snowfall) totaled 4.14 inches, which was 80% of average.

...THE DICKINSON ND CLIMATE SUMMARY FOR THE SEASON, FROM
3/1/2010 TO 5/31/2010...

CLIMATE NORMAL PERIOD 1971 TO 2000
CLIMATE RECORD PERIOD 1903 TO 2010

WEATHER         OBSERVED          NORMAL DEPART LAST YEAR`S
                 VALUE   DATE(S) VALUE   FROM    VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
HIGH             102   05/29/1934
LOW              -33   03/10/1948
HIGHEST            79   05/28        MM      MM       80 05/30
                        05/27                             05/18
LOWEST              9   03/12        MM      MM      -21 03/11
AVG. MAXIMUM     52.2              53.6    -1.4     48.5
AVG. MINIMUM     30.7              30.4     0.3     25.6
MEAN             41.4              42.0    -0.6     37.0
DAYS MAX >= 90      0                MM      MM        0
DAYS MAX <= 32     11                MM      MM       22
DAYS MIN <= 32     53                MM      MM       59
DAYS MIN <= 0       0                MM      MM        7

PRECIPITATION (INCHES)

TOTALS           4.14              5.16   -1.02     3.65

DAYS >= .01        25                MM      MM       20
DAYS >= .10        11                MM      MM        9
DAYS >= .50         1                MM      MM        2
DAYS >= 1.00        1                MM      MM        0
GREATEST
24 HR. TOTAL    1.39

DEGREE_DAYS
HEATING TOTAL    2155
COOLING TOTAL       7
.................................................................

WIND (MPH)
HIGHEST WIND SPEED/DIRECTION    52/270    DATE 05/04
HIGHEST GUST SPEED/DIRECTION    63/280    DATE 05/04

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
NUMBER OF DAYS FAIR           43
NUMBER OF DAYS PC             23
NUMBER OF DAYS CLOUDY         25

AVERAGE RH (PERCENT)     72

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              3     MIXED PRECIP               0
HEAVY RAIN                3     RAIN                      10
LIGHT RAIN               32     FREEZING RAIN              0
LT FREEZING RAIN          2     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW               15     SLEET                      0
FOG                      50     FOG W/VIS <= 1/4 MILE     18
HAZE                      7

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

Minot

…5^th warmest and 21^st wettest spring on record…

Temperatures during the 2010 spring season (defined as the months of March-April-May) at the Minot airport averaged 44.5 degrees, which was 3.4 degrees above the 1971 to 2000 climatological average. Overall, the spring of 2010 will go down in the books as being the 5^th warmest on record dating back to 1905. This occurred in spite of the fact that during May temperatures were 2.6 degrees below average. It was during the preceding months of March and April when warm conditions prevailed. These months ranked as the 8^th and 10^th warmest on record, respectively.

The daily temperatures ranged from 81 degrees on the 18^th of May to 8 degrees on the 1^st of March. There were a total of 7 days in which the mercury never broke the freezing mark.

Precipitation during the season (including rain and liquid from snowfall) totaled 6.20 inches, which was 115% of average, and ranked the spring of 2010 as being tied with 1941 and 1978 as being the 21^st wettest on record.

...THE MINOT ND CLIMATE SUMMARY FOR THE SEASON, FROM
3/1/2010 TO 5/31/2010...

CLIMATE NORMAL PERIOD 1971 TO 2000
CLIMATE RECORD PERIOD 1905 TO 2010

WEATHER         OBSERVED          NORMAL DEPART LAST YEAR`S
                 VALUE   DATE(S) VALUE   FROM    VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
HIGH             105   MM
LOW              -35   MM
HIGHEST            81   05/18        MM      MM       79 05/29
                                                          05/27
LOWEST              8   03/01        MM      MM      -16 03/11
                                                          03/01
AVG. MAXIMUM     54.6              51.4     3.2     47.8
AVG. MINIMUM     34.5              30.7     3.8     27.1
MEAN             44.5              41.1     3.4     37.4
DAYS MAX >= 90      0                MM      MM        0
DAYS MAX <= 32      7                MM      MM       18
DAYS MIN <= 32     40                MM      MM       52
DAYS MIN <= 0       0                MM      MM        8

PRECIPITATION (INCHES)

TOTALS           6.20              5.37    0.83     3.37

DAYS >= .01        24                MM      MM       23
DAYS >= .10        11                MM      MM        8
DAYS >= .50         4                MM      MM        2
DAYS >= 1.00        2                MM      MM        0
GREATEST
24 HR. TOTAL    1.96

DEGREE_DAYS
HEATING TOTAL    1863
COOLING TOTAL       2
.................................................................

WIND (MPH)
HIGHEST WIND SPEED/DIRECTION    45/210    DATE 05/25
HIGHEST GUST SPEED/DIRECTION    62/220    DATE 05/25

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
NUMBER OF DAYS FAIR           43
NUMBER OF DAYS PC             21
NUMBER OF DAYS CLOUDY         27

AVERAGE RH (PERCENT)     67

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              7     MIXED PRECIP               0
HEAVY RAIN                6     RAIN                      10
LIGHT RAIN               27     FREEZING RAIN              0
LT FREEZING RAIN          3     HAIL                       2
HEAVY SNOW                0     SNOW                       1
LIGHT SNOW               15     SLEET                      0
FOG                      39     FOG W/VIS <= 1/4 MILE     11
HAZE                     22

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

Jamestown

…8^th warmest and 21^st wettest spring on record…

Temperatures during the 2010 spring season (defined as the months of March-April-May) at the Minot airport averaged 45.4 degrees, which was 3.9 degrees above the 1971 to 2000 climatological average. Overall, the spring of 2010 will go down in the books as being the 8^th warmest on record dating back to 1893. This occurred in spite of the fact that during May temperatures were 2.0 degrees below average. It was during the preceding months of March and April when warm conditions prevailed. These months ranked as the 16^th and 11^th warmest on record, respectively.

The daily temperatures ranged from 89 degrees on the 28^th of May to -8 degrees on the 1^st of March. There were a total of 6 days in which the mercury never broke the freezing mark.

Precipitation during the season (including rain and liquid from snowfall) totaled 8.33 inches, which was 195% of average, and ranked the spring of 2010 as being the 11^th wettest on record.

...THE JAMESTOWN ND CLIMATE SUMMARY FOR THE SEASON, FROM
3/1/2010 TO 5/31/2010...

CLIMATE NORMAL PERIOD 1971 TO 2000
CLIMATE RECORD PERIOD 1891 TO 2010

WEATHER         OBSERVED          NORMAL DEPART LAST YEAR`S
                 VALUE   DATE(S) VALUE   FROM    VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
HIGH             107   05/29/1934
LOW              -29   03/10/1948
HIGHEST            89   05/28        MM      MM       83 05/31
LOWEST             -8   03/01        MM      MM      -22 03/01
AVG. MAXIMUM     55.8              52.7     3.1     47.5
AVG. MINIMUM     35.0              30.3     4.7     26.5
MEAN             45.4              41.5     3.9     37.0
DAYS MAX >= 90      0                MM      MM        0
DAYS MAX <= 32      6                MM      MM       21
DAYS MIN <= 32     39                MM      MM       51
DAYS MIN <= 0       1                MM      MM        7

PRECIPITATION (INCHES)

TOTALS           8.33              4.28    4.05     3.58

DAYS >= .01        29                MM      MM       23
DAYS >= .10        15                MM      MM       12
DAYS >= .50         6                MM      MM        1
DAYS >= 1.00        2                MM      MM        0
GREATEST
24 HR. TOTAL    2.07

DEGREE_DAYS
HEATING TOTAL    1805
COOLING TOTAL      23
.................................................................

WIND (MPH)
HIGHEST WIND SPEED/DIRECTION    46/170    DATE 05/24
HIGHEST GUST SPEED/DIRECTION    61/140    DATE 05/24

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
NUMBER OF DAYS FAIR           50
NUMBER OF DAYS PC             17
NUMBER OF DAYS CLOUDY         25

AVERAGE RH (PERCENT)     70

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              6     MIXED PRECIP               0
HEAVY RAIN                4     RAIN                       8
LIGHT RAIN               36     FREEZING RAIN              0
LT FREEZING RAIN          1     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW               10     SLEET                      0
FOG                      44     FOG W/VIS <= 1/4 MILE     12
HAZE                     10

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

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Spring 2010 Climate Summary