A Preview of Denver's November Weather

         ...A PREVIEW OF DENVER`S NOVEMBER WEATHER...

NOVEMBER HAS OFTEN BEEN DESCRIBED AS THE MONTH WHEN WINTER REALLY
BEGINS IN THE MILE HIGH CITY. THE TRANSITION FROM THE USUALLY MILD
OCTOBER, THROUGH THE WINTER SOLSTICE IN DECEMBER, PLACES NOVEMBER AS
THE WINTER TRANSITION MONTH. CANADIAN COLD FRONTS BEGIN TO PUSH
THROUGH FRONT RANGE WITH MORE FORCE AS THE DAYLIGHT DIMINISHES
FURTHER. DURING THIS NOVEMBER TIMEFRAME, PACIFIC TROUGHS OF LOW
PRESSURE BEGIN TO DIG DEEPER SOUTHWARD INTO THE ROCKIES, TYPICALLY
BRINGING STRONGER STORMS.

DENVER`S MONTHLY MEAN TEMPERATURE FOR NOVEMBER IS 38.6 DEGREES
(1981-2010). THE MONTH BEGINS WITH A DAILY NORMAL HIGH OF 59 DEGREES
AND BY MONTHS END, THE NORMAL HIGH COMES DOWN TO 46 DEGREES.
LIKEWISE FOR LOWS, THE MONTH BEGINS WITH A NORMAL LOW OF 31 DEGREES
AND FINISHES WITH A MUCH COLDER NORMAL LOW OF 19 DEGREES. THE
WARMEST TEMPERATURE EVER RECORDED DURING THE MONTH OF NOVEMBER,
SINCE RECORDS BEGAN IN 1872, WAS 80 DEGREES ON THE 6TH DAY OF THE
MONTH, 2006. NOVEMBERS COLDEST TEMPERATURE IN DENVER WAS -18 ON THE
29TH DAY OF 1877.

DENVER`S COLDEST NOVEMBERS (MEAN TEMPERATURES):

22.0 DEGREES 1880
28.9                      2000
29.8                      1985
31.6                      1929
32.3                      1952

DENVER`S WARMEST NOVEMBER (MEAN TEMPERATURES):

50.9 DEGREES 1949
47.1                      1999
46.2                      1914, 1933
45.9                      1927, 1981
45.6                      1901, 1910, 1917

BEHIND MARCH, NOVEMBER IS DENVER`S 2ND SNOWIEST MONTH WITH THE CITY
COLLECTING 8.7 INCHES ON AVERAGE (1981-2010). SIMILAR TO DENVER`S
OTHER 3 SNOWIEST MONTHS OF MARCH, APRIL AND DECEMBER, NOVEMBER ALSO
HAS THE CAPABILITY TO PRODUCE BIG SNOWSTORMS. THE BIGGEST SNOWSTORM
DENVER RECEIVED DURING THE MONTH OF NOVEMBER WAS A POWERFUL 3 DAY
EVENT WHICH DROPPED 30.4 INCHES OF SNOW FROM THE 2ND THROUGH THE 4TH
OF 1946. THE SECOND HEAVIEST SNOWFALL EVENT FOR NOVEMBER OCCURRED IN
1983. THAT 4 DAY EVENT GAVE THE CITY 22.4 INCHES FROM THE 26TH
THROUGH THE 29TH.

AT TIMES, DROUGHT-LIKE CONDITIONS EXTEND THROUGH THE WINTER MONTHS,
FOR WHICH NOVEMBER IS NOT IMMUNE. THIS CAN BRING EXTENDED DRY
PERIODS, OFTEN TIMES ACCOMPANIED BY A VERY WINDY PATTERN ALONG
THE EASTERN FRONT RANGE LOCATIONS INCLUDING DENVER.

DENVER`S SNOWIEST NOVEMBERS:
 
42.6 INCHES  1946
29.6                  1991
29.3                  1983
23.1                  1928, 1929
22.9                  1908

DENVER`S LEAST SNOWIEST NOVEMBERS:

0.0 INCHES  1949
  T                   1884, 1899, 1901, 1905, 1917, 1939
0.3                  1883
0.5                  1885
0.8                  1900

                    ...THE OUTLOOK FOR NOVEMBER 2011...

AFTER A MILD EARLY TO MIDDLE OCTOBER, 2011, THE WEATHER PATTERN
QUICKLY SHIFTED TO WINTERLIKE DURING THE FINAL WEEK. THIS COLD AND
MOIST PROGRESSIVE PATTERN IS EXPECTED TO CONTINUE THROUGH THE FIRST
HALF OF NOVEMBER, 2011. A PATTERN OF DRYER AND MORE MILD WEATHER
CONDITIONS ARE EXPECTED FOR THE FINAL HALF.

                       ...NOVEMBER STATISTICS...

...TEMPERATURES (1981-2010 NORMALS)...

AVERAGE HIGH.......................................................  52.3
AVERAGE LOW........................................................  24.9
MONTHLY MEAN.....................................................  38.6
DAYS WITH HIGH 90 OR ABOVE.........................    0
DAYS WITH HIGH 32 OR BELOW........................    3  (2.6)
DAYS WITH LOW 32 OR BELOW.........................  23 (23.3)
DAYS WITH LOWS ZERO OR BELOW................   0  (0.4)

...PRECIPITATION...

MONTHLY MEAN......................................................   0.82 INCH
DAYS WITH MEASURABLE PRECIPITATION.....   6  (5.6)
AVERAGE SNOWFALL............................................   8.7 INCHES (2ND SNOWIEST MONTH)
DAYS WITH 1.0 INCH OR MORE SNOWFALL....   3  (2.6)

...MISCELLANEOUS OCTOBER AVERAGES...

HEATING DEGREE DAYS......................................  792
COOLING DEGREE DAYS.....................................       0 (<0.5)
WIND SPEED (MPH)...............................................       8.2*
WIND DIRECTION...................................................   SOUTH*
DAYS WITH THUNDERSTORMS..........................       0* (<1.0)
DAYS WITH DENSE FOG.......................................       1*
PERCENT OF SUNSHINE.....................................     64*

(NOTE: SUNSHINE DATA ARE NO LONGER REPORTED AS OF OCTOBER 1, 2009)

* = 1971-2002 NORMALS

...NOVEMBER EXTREMES...

RECORD HIGH.............................................................   80 DEGREES ON 11/08/2006
RECORD LOW..............................................................  -18 DEGREES ON 11/29/1877
WARMEST......................................................................   50.9 DEGREES IN 1949
MAXIMUM/MINIMUM COOLING DEGREES DAYS...  NONE EVER RECORDED
COLDEST.......................................................................   22.0 DEGREES IN 1880
MAXIMUM HEATING DEGREE DAYS.........................  1283 IN 1880
MINIMUM HEATING DEGREE DAYS..........................   425 IN 1949
WETTEST........................................................................   3.21 INCHES IN 1946
DRIEST............................................................................   T IN 1949, 1901, 1899

FREDIN



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