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

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35

000
CXUS55 KBOU 011242
CLMDEN

CLIMATE REPORT
NATIONAL WEATHER SERVICE BOULDER, CO
642 AM MDT SUN JUN 1 2014

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

...THE DENVER CO CLIMATE SUMMARY FOR THE MONTH OF MAY 2014...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1872 TO 2014

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              95   05/26/1942
 LOW               19   05/02/2013
                        05/03/1907
HIGHEST            87   05/28        95      -8       88  05/17
                        05/29
LOWEST             30   05/12        19      11       19  05/02
AVG. MAXIMUM     70.6              71.5    -0.9     71.7
AVG. MINIMUM     44.5              42.7     1.8     44.1
MEAN             57.5              57.1     0.4     57.9
DAYS MAX >= 90      0               0.8    -0.8        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      4               1.9     2.1        4
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         8.57   1876
 MINIMUM         0.06   1974
TOTALS           3.51              2.12    1.39     0.82
DAILY AVG.       0.11              0.07    0.04     0.03
DAYS >= .01        13               9.4     3.6        7
DAYS >= .10         6               4.8     1.2        3
DAYS >= .50         3               1.2     1.8        0
DAYS >= 1.00        1               0.2     0.8        0
GREATEST
 24 HR. TOTAL    1.39   05/20 TO 05/21              0.33  05/07 TO 05/08

SNOWFALL (INCHES)
TOTALS            1.1               1.1              3.4

DEGREE_DAYS
HEATING TOTAL     244               265     -21      253
 SINCE 7/1       5974              5996     -22     6055
COOLING TOTAL      21                21       0       42
 SINCE 1/1         21                22      -1       42

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

WIND (MPH)
AVERAGE WIND SPEED              10.6
RESULTANT WIND SPEED/DIRECTION   1/181
HIGHEST WIND SPEED/DIRECTION    37/330    DATE  05/21
HIGHEST GUST SPEED/DIRECTION    42/330    DATE  05/21

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.70
NUMBER OF DAYS FAIR            3
NUMBER OF DAYS PC             18
NUMBER OF DAYS CLOUDY         10

AVERAGE RH (PERCENT)     55

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                2     RAIN                       6
LIGHT RAIN               17     FREEZING RAIN              0
LT FREEZING RAIN          1     HAIL                       1
HEAVY SNOW                0     SNOW                       2
LIGHT SNOW                2     SLEET                      1
FOG                      11     FOG W/VIS <= 1/4 MILE      3
HAZE                      3

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

$$

...MAY 2014 NEAR AVERAGE TEMPERATURE AND ABOVE NORMAL PRECIPITATION...

MAY GOT OFF TO A WARM AND DRY START...WITH ABOVE NORMAL TEMPERATURES
THE FIRST SIX DAYS OF THE MONTH...WITH THE EXCEPTION OF THE FIRST.
HIGH TEMPERATURES IN THE 80`S WERE RECORDED FROM THE 3RD THROUGH THE
5TH. MUCH COOLER UNSETTLED WEATHER MOVED INTO NORTH CENTRAL AND
NORTHEASTERN COLORADO ON THE 7TH AND CONTINUED THROUGH THE 16TH.
EIGHT OUT OF TEN DAYS DURING THIS PERIOD HAD BELOW NORMAL
TEMPERATURES. THERE WAS ALSO A SIX CONSECUTIVE DAY STRETCH FROM THE
7TH THROUGH THE 12TH WITH MEASURABLE PRECIPITATION. 1.1 INCHES OF
SNOW WAS MEASURED AT DENVER INTERNATIONAL AIRPORT FROM THE 11TH
THROUGH THE 12TH WHICH WAS THE ONLY SNOW REPORTED DURING THE MONTH.

WARMER AND DRIER WEATHER MOVED INTO NORTH CENTRAL AND NORTHEASTERN
COLORADO ON THE 17TH AND CONTINUED THROUGH THE 19TH AS UPPER LEVEL
HIGH PRESSURE MOVED ACROSS THE ROCKY MOUNTAIN REGION.

COOLER WETTER WEATHER RETURNED TO THE FRONT RANGE OF COLORADO ON THE
20TH...AS A DEEP UPPER LEVEL STORM SYSTEM DEEPENED OVER SOUTHERN
NEVADA AND A COLD FRONT MOVED ACROSS NORTHEASTERN COLORADO. THE
COMBINATION OF A DEEP SOUTHERLY FLOW PUMPING IN MID AND UPPER LEVEL
MOISTURE...PLENTY OF LIFT AHEAD OF THE UPPER LEVEL STORM SYSTEM AND
INCREASED MOISTURE AND LIFT ASSOCIATED WITH UPSLOPE FLOW HELPED
PRODUCE SEVERE WEATHER AND AREAS OF HEAVY RAIN ALONG THE FRONT RANGE
URBAN CORRIDOR AND ADJACENT PLAINS FROM THE 20TH THROUGH THE 22ND. A
STRONG THUNDERSTORM MOVED ACROSS DENVER INTERNATIONAL AIRPORT ON THE
AFTERNOON OF THE 21ST...PRODUCING HAIL AND 1.20 INCHES OF
PRECIPITATION. THE LAST FIVE DAYS OF THE MONTH WERE WARM AND
RELATIVELY DRY WITH TEMPERATURES IN THE 80`S WITH THE EXCEPTION OF
THE 30TH.

TEMPERATURES:

THE AVERAGE TEMPERATURE FOR THE MONTH OF MAY WAS 57.5 DEGREES F
WHICH WAS 0.4 DEGREES ABOVE NORMAL. MAY OF 1934 WAS THE WARMEST MAY
ON RECORD...WITH AN AVERAGE TEMPERATURE OF 64.6 DEGREES F. THE
COLDEST MAY ON RECORD WAS 48.7 DEGREES F WAY BACK IN 1917. THERE
WERE NO DAYS IN WHICH THE MAXIMUM TEMPERATURE EXCEEDED 90 DEGREES.
THE HIGHEST TEMPERATURE OF THE MONTH WAS 85 DEGREES WHICH OCCURRED
ON THE 4TH...AND THE COLDEST TEMPERATURE OF THE MONTH WAS 30 DEGREES
ON THE MORNING OF THE 12TH.

PRECIPITATION:

PRECIPITATION FOR THE MONTH OF MAY WAS 3.51 INCHES...WHICH IS 1.39
INCHES ABOVE THE NORMAL 0F 2.12 INCHES. 1.20 INCHES OF PRECIPITATION
FELL ON THE 21ST WHICH IS THE GREATEST DAILY AMOUNT FOR THE MONTH.
THE 3.51 INCHES OF PRECIPITATION DID NOT MAKE INTO THE TOP TEN LIST OF
WETTEST MAY`S ON RECORD.

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

8.57 INCHES 1876  *WETTEST MONTH IN DENVER WEATHER HISTORY
7.31 INCHES 1957
6.12 INCHES 1969
5.06 INCHES 1973
4.95 INCHES 1935
4.88 INCHES 1898
4.88 INCHES 1938
4.79 INCHES 2011
4.77 INCHES 1967
4.67 INCHES 1995

SNOW:

1.1 INCHES OF SNOW WAS RECORDED DURING THE MONTH...WHICH LANDED
RIGHT AT THE NORMAL OF 1.1 INCHES. THE GREATEST DAILY SNOWFALL
AMOUNT FOR THE MONTH WAS 0.7 INCHES WHICH OCCURRED ON THE 12TH.

TEN MOST SNOWIEST MAY`S IN DENVER WEATHER HISTORY SINCE 1882:

15.5 INCHES 1898
13.6 INCHES 1950
13.5 INCHES 1978
13.2 INCHES 1912
12.0 INCHES 1917
10.0 INCHES 1908
 9.0 INCHES 1907
 8.9 INCHES 1893
 8.8 INCHES 1957
 8.3 INCHES 1944

THERE WERE TWELVE DAYS IN WHICH THUNDER WAS OBSERVED AT DENVER
INTERNATIONAL AIRPORT...AND 3 DAYS WITH DENSE FOG WITH A VISIBILITY
AT OR BELOW 1/4 MILE DURING THE MONTH. A PEAK WIND OF 42 MPH FROM A
NORTHWESTERLY DIRECTION WAS RECORDED ON THE 21ST.



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.