Climatological Report (Monthly)
Issued by NWS Denver/Boulder, CO

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CLIMATE REPORT
NATIONAL WEATHER SERVICE BOULDER, CO
924 AM MST SUN MAR 1 2015

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

...THE DENVER CO CLIMATE SUMMARY FOR THE MONTH OF FEBRUARY 2015...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1872 TO 2015

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              77   02/28/2006
                        02/04/1890
 LOW              -25   02/01/1951
                        02/08/1936
HIGHEST            74   02/07        66       8       68  02/16
LOWEST             -6   02/27        -2      -4      -19  02/05
AVG. MAXIMUM     46.6              46.2     0.4     42.3
AVG. MINIMUM     21.0              18.9     2.1     14.1
MEAN             33.8              32.5     1.3     28.2
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      7               3.9     3.1        8
DAYS MIN <= 32     24              26.9    -2.9       26
DAYS MIN <= 0       2               1.3     0.7        5

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         2.01   1934
 MINIMUM         0.01   1970
TOTALS           1.25              0.37    0.88     0.19
DAILY AVG.       0.04              0.01    0.03     0.01
DAYS >= .01        10               5.3     4.7        4
DAYS >= .10         5               0.7     4.3        1
DAYS >= .50         0               0.0     0.0        0
DAYS >= 1.00        0               0.0     0.0        0
GREATEST
 24 HR. TOTAL    0.40   02/15 TO 02/16           02/04 TO 02/04

SNOWFALL (INCHES)
RECORDS
 TOTAL           22.4   2015
TOTALS           22.4               5.7

DEGREE_DAYS
HEATING TOTAL     864               908     -44     1022
 SINCE 7/1       4113              4439    -326     4519
COOLING TOTAL       0                 0       0        0
 SINCE 1/1          0                 0       0        0

FREEZE DATES
RECORD
 EARLIEST     09/08/1962
 LATEST       06/08/2007
EARLIEST                        10/07
LATEST                          05/05
.....................................................

WIND (MPH)
AVERAGE WIND SPEED              9.4
RESULTANT WIND SPEED/DIRECTION   2/205
HIGHEST WIND SPEED/DIRECTION    44/010    DATE  02/21
HIGHEST GUST SPEED/DIRECTION    43/040    DATE  02/04

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR            5
NUMBER OF DAYS PC             15
NUMBER OF DAYS CLOUDY          8

AVERAGE RH (PERCENT)     60

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                1     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                4     SNOW                       8
LIGHT SNOW               13     SLEET                      0
FOG                      12     FOG W/VIS <= 1/4 MILE      8
HAZE                      9

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

..........FEBRUARY 2015 WETTER AND SLIGHTLY WARMER THAN NORMAL............

FEBRUARY 2015 WAS A MONTH OF WEATHER CONTRASTS WITH THE FIRST HALF OF
THE MONTH VERY WARM AND DRY...AND THE LATTER HALF COLD AND SNOWY.
THE MONTH STARTED OUT COLD WITH LIGHT SNOW AS AN UPPER LEVEL TROUGH
OF LOW PRESSURE MOVED ACROSS THE REGION.

WARMER AND DRIER WEATHER RETURNED ON THE 2ND AS THE UPPER TROUGH MOVED TO THE EAST AND A WARM DOWNSLOPE DEVELOPED ALONG THE LEE OF FRONT RANGE. DENVER EXPERIENCED VERY WARM TEMPERATURES FROM THE 6TH THROUGH THE 9TH AS THE UPPER RIDGE MOVED DIRECTLY OVER COLORADO. THE HIGH TEMPERATURE AT DENVER INTERNATIONAL AIRPORT REACHED OR EXCEEDED 70 DEGREES ON THE 6TH...7TH AND 9TH. COOLER TEMPERATURES RETURNED TO THE AREA ON THE 10TH AND 11TH AS AN UPPER LEVEL DISTURBANCE AND ASSOCIATED COLD FRONT MOVED ACROSS THE REGION. DESPITE THE COOL DOWN...TEMPERATURES REMAINED AT ABOVE NORMAL VALUES. UPPER LEVEL HIGH PRESSURE REBUILT OVER THE ROCKY MOUNTAIN REGION ON THE 12TH BRINGING MUCH ABOVE NORMAL TEMPERATURES ONCE AGAIN TO NORTHEASTERN COLORADO FROM THE 12TH THROUGH 14TH.

DURING THE MIDDLE OF THE MONTH...A WEATHER PATTERN CHANGED OCCURRED
WHICH ALLOWED A SERIES OF STORM SYSTEMS TO MOVE ACROSS NORTH CENTRAL
AND NORTHEASTERN COLORADO FROM THE 15TH THROUGH THE END OF THE
MONTH. THE MOST NOTABLE STORM DURING THIS PERIOD OCCURRED FROM THE
20TH THROUGH THE 22ND. THIS STORM BROUGHT 8 TO 24 INCHES OF SNOW TO
THE FRONT RANGE URBAN CORRIDOR AND PALMER DIVIDE...WITH 9.5 INCHES
MEASURED AT AT DENVER INTERNATIONAL AIRPORT.

TEMPERATURES:

THERE WAS QUITE A RANGE IN TEMPERATURES DURING THE MONTH WITH A HIGH OF 74 DEGREES ON THE 7TH AND A LOW OF SIX BELOW ZERO ON THE MORNING OF THE 27TH.  THE FIRST HALF OF FEBRUARY WAS VERY WARM WITH THE AVERAGE TEMPERATURE 13.3 DEGREES ABOVE NORMAL THROUGH THE FIRST 14 DAYS OF THE MONTH. DESPITE THE VERY WARM START...THE MONTH ENDED WITH AN AVERAGE TEMPERATURE OF 33.8 DEGREES F WHICH IS ONLY 1.3 DEGREES ABOVE NORMAL. FEBRUARY OF 1954 WAS THE WARMEST FEBRUARY ON RECORD...WITH AN AVERAGE TEMPERATURE OF 43.7 DEGREES F.  THE COLDEST FEBRUARY ON RECORD WAS 17.7 DEGREES F BACK IN 1899. THERE WERE 7 DAYS IN WHICH THE TEMPERATURE DID NOT EXCEED 32 DEGREES F...AND 2 DAYS WITH LOW TEMPERATURES AT OR BELOW ZERO DEGREES F.

DAILY RECORDS:

DATE      TEMPERATURE    TYPE OF RECORD    OLD RECORD   YEAR LAST SET

FEB 6TH   70 DEGREES      RECORD HIGH      69 DEGREES       1944
FEB 6TH   46 DEGREES      RECORD HIGH MIN  41 DEGREES       1930^
FEB 7TH   74 DEGREES      RECORD HIGH      71 DEGREES       1987
FEB 7TH   41 DEGREES      RECORD HIGH MIN  39 DEGREES       1926

^DENOTES PREVIOUS YEARS

PRECIPITATION:

PRECIPITATION FOR THE MONTH OF FEBRUARY AT DENVER INTERNATIONAL
AIRPORT WAS 1.25 INCHES...WHICH IS 0.88 INCHES ABOVE THE NORMAL OF
0.37 INCHES. THERE WERE 10 DAYS WITH MEASURABLE PRECIPITATION. ON THE
16TH...0.37 INCHES OF PRECIPITATION FELL WHICH IS THE GREATEST DAILY
AMOUNT FOR THE MONTH.

TEN WETTEST FEBRUARY`S IN DENVER WEATHER HISTORY SINCE 1872:

2.01 INCHES 1934
1.66 INCHES 1960
1.44 INCHES 1942
1.39 INCHES 1953
1.35 INCHES 1909
1.34 INCHES 1912
1.31 INCHES 1959
1.28 INCHES 1966, 1939
1.27 INCHES 1965


10 DRIEST FEBRUARYS IN DENVER WEATHER HISTORY SINCE 1872:

0.01 INCHES 1970
0.02 INCHES 2005
0.03 INCHES 1916
0.04 INCHES 2009, 1954, 1925, 1908
0.06 INCHES 1906, 1901
0.07 INCHES 1983

SNOW:

22.4 INCHES OF SNOW WAS MEASURED AT DENVER INTERNATIONAL AIRPORT
DURING THE MONTH...WHICH IS 16.7 INCHES ABOVE THE NORMAL OF 5.7
INCHES. THIS MAKES FEBRUARY 2015 THE SNOWIEST FEBRUARY ON RECORD.
THIS BREAKS THE OLD RECORD OF 22.1 INCHES SET BACK IN 1912. ON THE
21ST...6.0 INCHES OF SNOW WAS MEASURED AT DENVER INTERNATIONAL
AIRPORT...WHICH IS THE GREATEST DAILY SNOWFALL FOR THE MONTH.

TEN GREATEST MONTHLY FEBRUARY SNOWFALL AMOUNTS
IN DENVER WEATHER HISTORY SINCE 1872:

22.4 INCHES 2015
22.1 INCHES 1912
20.2 INCHES 2012
19.5 INCHES 1942
18.3 INCHES 1960, 1909
17.5 INCHES 1959
17.1 INCHES 1965
16.9 INCHES 1993
16.5 INCHES 1953

TEN LEAST MONTHLY FEBRUARY SNOWFALL AMOUNTS
IN DENVER WEATHER HISTORY SINCE 1872:

T   INCHES 2009
0.1 INCHES 1992
0.2 INCHES 1970
0.3 INCHES 1954
0.4 INCHES 1925
0.5 INCHES 2005
0.8 INCHES 1991
0.9 INCHES 1983
1.0 INCHES 1943, 1908

THERE WERE NO DAYS IN WHICH THUNDER OR HAIL WAS OBSERVED AT DENVER
INTERNATIONAL AIRPORT. THERE WERE 8 DAYS WITH DENSE FOG WITH A
VISIBILITY AT OR BELOW 1/4 MILE DURING THE MONTH. A PEAK WIND OF 43
MPH FROM A NORTHEASTERLY DIRECTION WAS RECORDED ON THE 4TH.

$$


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