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

000
CXUS55 KBOU 050206
CLMDEN

CLIMATE REPORT
NATIONAL WEATHER SERVICE BOULDER, CO
806 PM MDT SAT JUL 4 2015

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

...THE DENVER CO CLIMATE SUMMARY FOR THE MONTH OF JUNE 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             105   06/26/2012
                        06/25/2012
                        54/01/2206
 LOW               30   06/02/1951
HIGHEST            94   06/30                         94  06/26
LOWEST             51   06/03                         42  06/15
AVG. MAXIMUM     82.9              82.4     0.5     83.4
AVG. MINIMUM     56.1              52.3     3.8     51.2
MEAN             69.5              67.4     2.1     67.3
DAYS MAX >= 90      6               7.9    -1.9        6
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      0               0.0     0.0        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         4.96   1882
 MINIMUM            T   1890
TOTALS           2.53              1.98    0.55     1.82
DAILY AVG.       0.08              0.07    0.01     0.06
DAYS >= .01        13               8.4     4.6        9
DAYS >= .10         5               4.6     0.4        5
DAYS >= .50         2               1.4     0.6        1
DAYS >= 1.00        0               0.3    -0.3        0
GREATEST
 24 HR. TOTAL    0.99   06/05 TO 06/05           06/27 TO 06/27

SNOWFALL (INCHES)
RECORDS
 TOTAL            0.0
TOTALS            0.0               0.0

DEGREE_DAYS
HEATING TOTAL      11                62     -51       30
 SINCE 7/1       5583              6058    -475     6004
COOLING TOTAL     154               133      21      106
 SINCE 1/1        158               155       3      127

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

WIND (MPH)
AVERAGE WIND SPEED              9.0
RESULTANT WIND SPEED/DIRECTION   2/167
HIGHEST WIND SPEED/DIRECTION    36/160    DATE  06/24
HIGHEST GUST SPEED/DIRECTION    47/160    DATE  06/24

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR            6
NUMBER OF DAYS PC             22
NUMBER OF DAYS CLOUDY          2

AVERAGE RH (PERCENT)     61

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             16     MIXED PRECIP               0
HEAVY RAIN                4     RAIN                       5
LIGHT RAIN               16     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       3
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      1
FOG                       6     FOG W/VIS <= 1/4 MILE      1
HAZE                      3

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.
_________________________________________________________________________________________
.....JUNE 2015 WARMER AND WETTER THAN NORMAL.....

JUNE CONTINUED WHERE MAY LEFT OFF WITH WET WEATHER CONTINUING ACROSS
PARTS OF THE DENVER METRO AREA. UPPER LEVEL HIGH PRESSURE OVER THE
ROCKY MOUNTAIN REGION BROUGHT WARM AND DRY WEATHER TO DENVER THE
FIRST TWO DAYS OF THE MONTH. A COLD FRONT BROUGHT COOLER
TEMPERATURES TO NORTHEASTERN COLORADO ON THE 3RD. INCREASED MOISTURE
AND UPSLOPE FLOW BEHIND THE FRONT PRODUCED SOME SEVERE WEATHER
MAINLY TO SOUTH AND EAST OF DENVER DURING THE LATE AFTERNOON AND
EVENING HOURS. TEMPERATURES REBOUNDED INTO THE 80S ON THE 4TH...WITH
PLENTY OF MOISTURE REMAINING OVER THE AREA. DAYTIME HEATING...
STRONG SOUTHEASTERLY SURFACE WINDS AND AN UPPER LEVEL DISTURBANCE
MOVING INTO THE REGION FROM THE SOUTHWEST HELPED KICK OFF SLOW
MOVING SEVERE STORMS ALONG THE FRONT RANGE URBAN CORRIDOR AND PALMER
DIVIDE BY LATE AFTERNOON. THE HARDEST HIT AREA WAS ACROSS
NORTHEASTERN BOULDER AND EXTREME SOUTHEASTERN LARIMER COUNTIES.
DURING THE EVENING...A TORNADO TOUCHED DOWN 3 MILES SOUTH OF
BERTHOUD AND TRACKED WEST/NORTHWEST AND LIFTED 6 MILES SOUTHWEST OF
BERTHOUD. A FEW SMALL AREAS ALONG THIS PATH HAD F3 DAMAGE. DENVER
INTERNATIONAL AIRPORT MANAGED TO MISS ALL THE STORMS AND ONLY
MEASURED 0.01 INCHES OF PRECIPITATION. ON THE 5TH...A LARGE UPPER
LEVEL LOW PRESSURE SYSTEM DEEPENED OVER CENTRAL CALIFORNIA...WITH A
SOUTHWEST FLOW ALOFT OVER COLORADO. AT THE SAME TIME...ANOTHER COLD
FRONT DROPPED INTO THE PLAINS. UPSLOPE FLOW BEHIND THE FRONT BROUGHT
COOLER TEMPERATURES AND SHOWERS AND STORMS TO THE FRONT RANGE URBAN
CORRIDOR. NEARLY AN INCH OF PRECIPITATION WAS MEASURED AT DENVER
INTERNATIONAL AIRPORT. THIS PATTERN CONTINUED THROUGH THE 7TH...WITH
SOME HEAVY RAIN OVER SECTIONS OF DENVER...HOWEVER DENVER
INTERNATIONAL AIRPORT MISSED OUT ON MOST OF THE PRECIPITATION.

UPPER LEVEL HIGH PRESSURE BUILT OVER THE ROCKY MOUNTAIN REGION ON
THE 8TH AND REMAINED OVER THE AREA THROUGH THE 10TH. ON THE
11TH...SLOW MOVING THUNDERSTORMS WITH HEAVY RAIN DEVELOPED ACROSS
MUCH OF THE FRONT RANGE URBAN CORRIDOR...AS AN UPPER LEVEL LOW
PRESSURE SYSTEM TRACKING ACROSS SOUTHERN COLORADO COMBINED WITH A
MOIST UPSLOPE FLOW. MANY AREAS RECEIVED ONE TO TWO INCHES OF
RAIN...WITH NEARLY FOUR INCHES OF RAIN IN PARTS OF DENVER AND THE
PALMER DIVIDE. DENVER INTERNATIONAL AIRPORT RECEIVED OVER ONE HALF
INCH WITH THIS EVENT. THE UPPER LOW SLOWLY MOVED ACROSS THE REGION
BEFORE MOVING INTO THE CENTRAL PLAINS STATES ON THE 13TH. UPPER
LEVEL HIGH PRESSURE BUILT OVER THE SOUTHWESTERN STATES ON THE 15TH
WITH A WESTERLY FLOW DEVELOPING OVER COLORADO BY THE 16TH. THIS
PATTERN BROUGHT WARMER AND DRIER WEATHER TO THE AREA THROUGH THE
23RD.

THE UPPER RIDGE SHIFTED INTO THE SOUTHERN PLAINS STATES ON THE
24TH WHICH ALLOWED SOME MONSOONAL MOISTURE TO MOVE INTO COLORADO
FROM THE SOUTH. ON THE AFTERNOON OF THE 24TH...AMPLE LOW LEVEL
MOISTURE...DAYTIME HEATING AND A SURFACE BOUNDARY CAME TOGETHER TO
PRODUCE SEVERE STORMS WITH HAIL AND VERY HEAVY RAIN. ONE TO THREE
INCHES OF RAIN PRODUCED FLASH FLOODING IN PARTS OF DENVER. IN
ADDITION...A F1 TORNADO TRACKED ACROSS NORTHEAST DENVER AND
NORTHWEST AURORA JUST SOUTH OF COLFAX AVE. DRIER WEATHER RETURNED TO
DENVER ON THE 26TH AND CONTINUED THROUGH THE END OF THE MONTH AS
UPPER LEVEL HIGH PRESSURE REBUILT OVER THE INTERMOUNTAIN WEST.

TEMPERATURES:

THE AVERAGE TEMPERATURE AT DENVER INTERNATIONAL AIRPORT FOR THE
MONTH OF JUNE WAS 69.5 DEGREES F WHICH WAS 2.1 DEGREES ABOVE NORMAL.
JUNE OF 2012 WAS THE WARMEST JUNE ON RECORD...WITH AN AVERAGE
TEMPERATURE OF 75.0 DEGREES F. THERE WERE 6 DAYS DURING THE MONTH IN
WHICH THE TEMPERATURE REACHED OR EXCEEDED THE 90 DEGREE MARK...AND
NO DAYS AT OR ABOVE 100 DEGREES. THE COLDEST JUNE ON RECORD WAS 60.6
DEGREES F BACK IN 1967. THE HIGHEST TEMPERATURE OF THE MONTH WAS 94
DEGREES WHICH OCCURRED ON THE 30TH. THE COLDEST TEMPERATURE OF THE
MONTH WAS 51 DEGREES ON THE MORNING OF THE 3RD.

PRECIPITATION:

PRECIPITATION FOR THE MONTH OF JUNE AT DENVER INTERNATIONAL AIRPORT
WAS 2.53 INCHES...WHICH IS 0.55 INCHES ABOVE THE NORMAL OF 1.98
INCHES. THERE WERE 13 DAYS WITH MEASURABLE PRECIPITATION. ON THE
5TH...0.99 INCHES OF PRECIPITATION FELL WHICH IS THE GREATEST DAILY
AMOUNT FOR THE MONTH.

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

4.96 INCHES 1882
4.86 INCHES 2009
4.69 INCHES 1967
4.14 INCHES 1965
3.99 INCHES 2005
3.95 INCHES 2003...1949
3.83 INCHES 1970
3.59 INCHES 1963
3.55 INCHES 1923

10 DRIEST JUNE`S IN DENVER WEATHER HISTORY SINCE 1872:

TRACE       1890
0.08 INCHES 1916
0.09 INCHES 1980...1881
0.12 INCHES 2006...1952
0.13 INCHES 1893
0.16 INCHES 1933
0.17 INCHES 1930
0.19 INCHES 1922

THERE WERE 16 DAYS IN WHICH THUNDER WAS OBSERVED AT DENVER
INTERNATIONAL AND 3 DAYS WITH HAIL. THERE WAS ONLY 1 DAY WITH DENSE
FOG WITH A VISIBILITY AT OR BELOW 1/4 MILE DURING THE MONTH. THE
PEAK WIND FOR THE MONTH WAS 47 MPH WHICH OCCURRED BOTH ON THE 9TH
AND THE 24TH FROM A NORTHWESTERLY AND SOUTHERLY DIRECTION
RESPECTIVELY.
$$


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