Climatological Report (Monthly)
Issued by NWS Boise, ID

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CXUS55 KBOI 040540
CLMBOI

CLIMATE REPORT...REISSUED TO INCLUDE NARRATIVE
NATIONAL WEATHER SERVICE BOISE ID
1040 PM MST TUE MAR 3 2015

...MILDEST FEBRUARY...AND MILDEST WINTER...AT THE BOISE AIRPORT...

THE AVERAGE TEMPERATURE FOR FEBRUARY 2015 IS THE HIGHEST ON RECORD
AT THE BOISE AIRPORT...WHERE THE DATA SET GOES BACK TO 1940. LOOKING
BACK EVEN FURTHER...ONLY FEBRUARY 1934 WAS MILDER.

TEMPERATURES AVERAGED AT OR BELOW NORMAL ON ONLY 4 DAYS.

THE 65 DEGREES ON BOTH THE 7TH AND THE 8TH SET NEW HIGH TEMPERATURE
RECORDS FOR THOSE DATES. AND THE LOW OF 51 ON THE 6TH NOT ONLY SET A
RECORD FOR THAT DATE...IT WAS ALSO THE HIGHEST OVERNIGHT LOW SO
EARLY IN THE SEASON. THE LOWS OF 50 ON THE 7TH AND 47 ON THE 9TH
WERE ALSO RECORD SETTING.

IN FACT THE ENTIRE WINTER SEASON...DECEMBER THROUGH FEBRUARY...WAS
THE MILDEST EVER AT THE AIRPORT. IF WE INCLUDE EARLIER RECORDS...IT
TIED FOR THIRD PLACE WITH THE WINTER OF 1917-1918. ONLY THE WINTERS
OF 1933-1934 AND 1937-1938 WERE MILDER.

A PERSISTENT RIDGE OF HIGH PRESSURE ALOFT OVER THE WESTERN LOWER 48
WAS RESPONSIBLE FOR THE UNUSUALLY MILD FEBRUARY. PACIFIC WEATHER
SYSTEMS MOVING THROUGH THE RIDGE BROUGHT ABOVE AVERAGE PRECIPITATION
DURING THE FIRST 10 DAYS OF THE MONTH. BUT BY THE 11TH THE RIDGE HAD
GAINED ENOUGH AMPLITUDE TO KEEP US DRY.

BY THE 21ST THE RIDGE HAD SHIFTED TO THE WEST ENOUGH TO PUT THE
BOISE AREA UNDER NORTHERLY FLOW ALOFT...PULLING COOL AND RELATIVELY
DRY AIR SOUTH FROM B.C. AT THE SAME TIME ARCTIC AIR FROM EAST OF THE
CANADIAN ROCKIES WAS DESCENDING ON MONTANA AND WYOMING...BUT IT
NEVER MANAGED TO REACH BOISE. SO WE ENJOYED AFTERNOON TEMPERATURES
IN THE 40S AND 50S EACH DAY THROUGH THE END OF THE MONTH.
...................................

...THE BOISE ID CLIMATE SUMMARY FOR THE MONTH OF FEBRUARY 2015...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1878 TO 2015

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE
                                          NORMAL
.............................................................
TEMPERATURE (F)
HIGHEST            65   02/08
                        02/07
LOWEST             21   02/23
AVG. MAXIMUM     53.2              44.7     8.5
AVG. MINIMUM     34.6              28.3     6.3
MEAN             43.9              36.5     7.4
DAYS MAX >= 90      0
DAYS MAX <= 32      0
DAYS MIN <= 32     11
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         6.49   1872
TOTALS           1.35              0.99    0.36
DAYS >= .01        12
DAYS >= .10         5
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.40   02/03 TO 02/04

SNOWFALL (INCHES)
TOTALS            0.2
SINCE 7/1        13.3
GREATEST
 SNOW DEPTH         T   02/22
 24 HR TOTAL      0.2   02/22 TO 02/22

DEGREE_DAYS
HEATING TOTAL     582               798    -216      719
 SINCE 7/1       3595              4159    -564
COOLING TOTAL       0                 0       0        0
 SINCE 1/1          0                 0       0
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              6.6
RESULTANT WIND SPEED/DIRECTION   1/164
HIGHEST WIND SPEED/DIRECTION    24/340    DATE  02/21
HIGHEST GUST SPEED/DIRECTION    32/130    DATE  02/07

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM

AVERAGE RH (PERCENT)     65


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

$$


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