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

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000
CXUS55 KBOU 011206
CLMDEN

CLIMATE REPORT
NATIONAL WEATHER SERVICE BOULDER, CO
603 AM MDT THU MAY 1 2014

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

...THE DENVER CO CLIMATE SUMMARY FOR THE MONTH OF APRIL 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              90   04/30/1992
 LOW               -2   04/02/1975
HIGHEST            80   04/22        90     -10       80  04/29
LOWEST             18   04/14        -2      20        6  04/10
AVG. MAXIMUM     62.8              61.5     1.3     54.7
AVG. MINIMUM     35.2              33.3     1.9     28.7
MEAN             49.0              47.4     1.6     41.7
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      0               0.3    -0.3        4
DAYS MIN <= 32     10              13.0    -3.0       17
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         8.24   1900
 MINIMUM         0.03   1963
TOTALS           1.24              1.71   -0.47     1.87
DAILY AVG.       0.04              0.06   -0.02     0.06
DAYS >= .01         6               9.1    -3.1       13
DAYS >= .10         5               4.5     0.5        7
DAYS >= .50         0               0.9    -0.9        0
DAYS >= 1.00        0               0.5    -0.5        0
GREATEST
 24 HR. TOTAL    0.48   04/02 TO 04/03              0.50
                                                04/22 TO 04/23
SNOWFALL (INCHES)
TOTAL             5.6               6.8

DEGREE_DAYS
HEATING TOTAL     472               529     -57      690
 SINCE 7/1       5730              5731      -1     5802
COOLING TOTAL       0                 1      -1        0
 SINCE 1/1          0                 1      -1        0

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

WIND (MPH)
AVERAGE WIND SPEED              12.9
RESULTANT WIND SPEED/DIRECTION   2/299
HIGHEST WIND SPEED/DIRECTION    49/340    DATE  04/29
HIGHEST GUST SPEED/DIRECTION    66/340    DATE  04/29

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.70
NUMBER OF DAYS FAIR            1
NUMBER OF DAYS PC             22
NUMBER OF DAYS CLOUDY          7

AVERAGE RH (PERCENT)     50

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

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

.....APRIL 2014 SLIGHTLY WARMER AND DRIER THAN AVERAGE.....

APRIL 2014 GOT OFF TO A COOL AND WET START AS AN UPPER LEVEL TROUGH
OF LOW PRESSURE MOVED ACROSS THE ROCKY MOUNTAIN REGION. DENVER
EXPERIENCED BELOW NORMAL TEMPERATURES FROM THE 2ND THROUGH THE
4TH...WITH SNOW ON THE 2ND AND 3RD. TEMPERATURES REBOUNDED TO NEAR
NORMAL VALUES BY THE 5TH. WARM AND DRY WEATHER MOVED INTO NORTH
CENTRAL AND NORTHEASTERN COLORADO ON THE 8TH...AND CONTINUED THROUGH
THE 12TH AS A LARGE UPPER LEVEL RIDGE OF HIGH PRESSURE MOVED ACROSS
THE AREA. AN UPPER LEVEL STORM SYSTEM AND ASSOCIATED COLD FRONT
BROUGHT COLDER TEMPERATURES AND SNOW TO DENVER ON THE 13TH. UPPER
LEVEL HIGH PRESSUE...COMBINED WITH A DRY SOUTHWESTERLY FLOW ALOFT
BROUGHT ABOVE NORMAL TEMPERATURES TO THE FRONT RANGE OF COLORADO
FROM THE 18TH THROUGH 26TH. A LARGE UPPER LEVEL STORM SYSTEM TRACKED
ACROSS SOUTHERN COLORADO AND INTO NEBRASKA ON THE 27TH. THIS STORM
SYSTEM FAILED TO PRODUCE SIGNIFICANT PRECIPITATION ACROSS THE FRONT
RANGE FOOTHILLS AND ADJACENT PLAINS DESPITE THE FAVORABLE TRACK OF
THE 500 MILLIBAR LOW. THIS WAS DUE TO THE FACT THE THE SURFACE LOW
DEVELOPED OVER NEBRASKA...WHICH CAUSED DOWNSLOPE FLOW JUST EAST OF
THE MOUNTAINS. AS A RESULT...MOST OF THE PRECIPITATION STAYED EAST
OF DENVER. HOWEVER...DENVER INTERNATIONAL AIRPORT STILL MANAGED TO
RECORD 0.29 INCHES OF PRECIPITATION. COLD AIR BEHIND THE STORM
SYSTEM BROUGHT BELOW NORMAL TEMPERATURES TO NORTHEASTERN COLORADO
THE LAST FOUR DAYS OF THE MONTH.

TEMPERATURES:

THE AVERAGE TEMPERATURE FOR THE MONTH OF APRIL WAS 49.0 DEGREES F
WHICH WAS 1.6 DEGREES ABOVE NORMAL. APRIL OF 1946 AND 1981 WERE THE
WARMEST APRILS ON RECORD...WITH AN AVERAGE TEMPERATURE OF 56.4
DEGREES F. THE COLDEST APRIL ON RECORD WAS 38.8 DEGREES F WAY BACK
IN 1920.

THERE WERE NO DAYS IN WHICH THE DAYTIME HIGH TEMPERATURE DID NOT
EXCEED 32 DEGREES...AND NO DAYS IN WHICH THE LOW TEMPERATURE
DROPPED BELOW ZERO. THE HIGHEST TEMPERATURE OF THE MONTH WAS 80
DEGREES WHICH OCCURRED ON THE 22ND...AND THE COLDEST TEMPERATURE OF
THE MONTH WAS 18 DEGREES ON THE MORNING OF THE 14TH.

PRECIPITATION:

PRECIPITATION FOR THE MONTH OF APRIL WAS 1.24 INCHES...WHICH IS 0.47
INCHES BELOW THE NORMAL 0F 1.71 INCHES. 0.29 INCHES OF PRECIPITATION
FELL ON THE 27TH WHICH IS THE GREATEST DAILY AMOUNT FOR THE MONTH.

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

8.24 INCHES 1983
5.86 INCHES 1999
4.95 INCHES 1905
4.94 INCHES 1885
4.13 INCHES 1957
4.09 INCHES 1933
4.07 INCHES 1935
4.01 INCHES 1942
3.95 INCHES 1967
3.75 INCHES 1914

SNOW:

5.6 INCHES OF SNOW WAS RECORDED DURING THE MONTH...WHICH IS 1.2
INCHES BELOW THE NORMAL OF 6.8 INCHES. THE GREATEST DAILY SNOWFALL
AMOUNT FOR THE MONTH WAS 3.4 INCHES WHICH OCCURRED ON THE 3RD.

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

33.8 INCHES 1933
32.0 INCHES 1885
28.3 INCHES 1920
28.2 INCHES 1945
25.5 INCHES 1957
25.4 INCHES 1909
25.0 INCHES 1907
24.8 INCHES 1973
23.3 INCHES 1935
21.0 INCHES 1922

THERE WERE TWO DAYS IN WHICH THUNDER WAS OBSERVED AT DENVER
INTERNATIONAL AIRPORT...AND 2 DAYS WITH DENSE FOG WITH A VISIBILITY
AT OR BELOW 1/4 MILE DURING THE MONTH. A PEAK WIND OF 66 MPH FROM A
NORTHERLY DIRECTION WAS RECORDED ON THE 29TH.

$$



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