WFO Denver/Boulder

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PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
1015 PM MDT THU OCT 23 2008

          ...A PREVIEW OF DENVER'S NOVEMBER WEATHER...
     ...WILL NOVEMBER BE A FALL MONTH OR A WINTER MONTH?...

EVEN THOUGH NOVEMBER IS USUALLY A TRANQUIL MONTH WITH NUMEROUS PLEASANT SPRING
LIKE DAYS...IT CAN ALSO BE A SNOW PACKED WINTER TYPE MONTH.  IN FACT...
NOVEMBER IS DENVER'S 2ND SNOWIEST MONTH.  MARCH IS THE SNOWIEST DENVER MONTH
AND APRIL IS BEHIND NOVEMBER IN THIRD PLACE.

IN 1994...NOVEMBER WAS THE SNOWIEST MONTH OF THAT YEAR WITH 16.9 INCHES
RECORDED. ON THE 13TH AND 14TH OF THE MONTH...12.1 INCHES OF SNOW WAS 
RECORDED DURING THE 24 HOUR PERIOD WHICH IS MORE THAN THE TOTAL OF ANY OTHER
MONTH DURING THAT YEAR.  IN 1991...29.6 INCHES OF SNOW WAS RECORDED MAKING IT
THE 2ND SNOWIEST NOVEMBER.  IN 1992...20.1 INCHES OF SNOW WAS RECORDED MAKING
IT THE 8TH SNOWIEST NOVEMBER.  THE SNOWIEST NOVEMBER OCCURRED IN 1946 WITH
42.6 INCHES OF SNOW RECORDED.  

NOVEMBER 2002 MARKED THE 16TH MONTH IN A ROW FOR BELOW NORMAL PRECIPITATION
FOR DENVER.  2002 WAS THE DRIEST YEAR IN DENVER WEATHER HISTORY.  THE BELOW
NORMAL PRECIPITATION STREAK CONTINUED THROUGH FEBRUARY 2003 (19 MONTHS IN A
ROW)

NOVEMBER IS TIED WITH MAY AS THE MONTH WITH THE LEAST AMOUNT OF SUNSHINE WITH
64 PERCENT.  THAT COMPARES TO SEPTEMBER THAT HAS THE MOST SUNSHINE WITH 74
PERCENT. THE AVERAGE NOVEMBER TEMPERATURE IS 37.5 DEGREES WITH AN AVERAGE HIGH
OF 51.5 DEGREES AND AN AVERAGE LOW TEMPERATURE OF 23.5 DEGREES.  JUST 5 YEARS
AGO, NOVEMBER 1999 FINISHED AS THE SECOND WARMEST NOVEMBER WITH AN AVERAGE
TEMPERATURE OF 47.1 DEGREES.  AND JUST A YEAR LATER...NOVEMBER 2000 FINISHED
AS THE SECOND COLDEST NOVEMBER IN DENVER WEATHER HISTORY WITH AN AVERAGE
TEMPERATURE OF 28.9 DEGREES.  THE COLDEST NOVEMBER OCCURRED IN 1880 WITH AN
ICY 22.0 DEGREE AVERAGE TEMPERATURE WHILE THE WARMEST NOVEMBER OCCURRED IN
1949 WITH AN AVERAGE TEMPERATURE OF 50.9 DEGREES. 

              ...LOOKING BACK TO NOVEMBER 2007...

NOVEMBER 2007 WAS WARMER AND DRIER THAN NORMAL BUT NOT WARM OR DRY ENOUGH TO
GET INTO ANY TOP 10 CATEGORY.  THROUGH THE 20TH OF THE MONTH...NOVEMBER 2007
WAS BOUNCING AROUND AS THE SECOND WARMEST NOVEMBER.  THE AVERAGE TEMPERATURE
RANGED FROM 48 TO AROUND 50 DEGREES.  THE WARMEST NOVEMBER OCCURRED IN 1949
WITH AN AVERAGE TEMPERATURE OF 50.9 DEGREES. THERE IS A BIG GAP BETWEEN
WARMEST...50.9...AND THE SECOND WARMEST...47.1.  SO NOVEMBER 2007 REMAINED AS
SECOND WARMEST THROUGH NOVEMBER 20TH.  THEN OLD MAN WINTER MOVED IN AND HIGH
TEMPERATURES FROM THE 21ST THROUGH THE END OF THE MONTH RANGED FROM 46 DOWN TO
24 DEGREES.  LOW TEMPERATURES THROUGH THIS PERIOD RANGED FROM 22 DEGREES DOWN
TO 8 DEGREES.  AS A RESULT...NOVEMBER 2007 WAS KNOCKED COMPLETELY OUT OF THE
TOP 10 WARMEST. NOVEMBER 2007 FINISHED WITH AN AVERAGE TEMPERATURE OF 41.4
DEGREES RANGING FROM 76 DEGREES DOWN TO 8 DEGREES. THERE WERE 4 DAYS WITH
MAXIMUM READINGS BELOW 32 DEGREES (AVERAGE IS 5) AND 19 DAYS WITH LOW
TEMPERATURES BELOW FREEZING (AVERAGE IS 29).

PRECIPITATION DURING NOVEMBER 2007 WAS QUITE DISMAL FINISHING WITH ONLY 0.20
INCH OF LIQUID EQUIVALENT...MOST OF WHICH FELL IN THE FORM OF SNOW.  THIS WAS
0.78 INCH BELOW NORMAL. THERE WERE ONLY 3 DAYS WITH MEASURABLE MOISTURE WITH
0.13 INCH MEASURED ON THE 21ST.  THERE WERE 7 DAYS WITH SNOWFALL OF WHICH 3
ONLY HAD TRACE AMOUNTS AND 3 MEASURED 0.2 INCH OR LESS.  THE MAXIMUM SNOWFALL
OCCURRED ON THE 21ST WITH A MERE 2.0 INCHES AND THE TOTAL FOR THE MONTH WAS
2.5 INCHES.

THERE WERE NO THUNDERSTORMS RECORDED DURING THE MONTH. THERE WERE FOUR DAYS
WHEN DENSE FOG WAS OBSERVED (VISIBILITY 1/4 MILE OR LESS) AND 5 DAYS WITH
LIGHT FOG. THE PEAK WIND GUST WAS 41 MPH FROM A WESTERLY DIRECTION (290
DEGREES).
                ...OUTLOOK FOR NOVEMBER 2008... 
                                
THE NATIONAL WEATHER SERVICE 30-DAY OUTLOOK MODEL PREDICTS NORMAL OR SLIGHTLY
ABOVE NORMAL TEMPERATURES FOR NOVEMBER.  BUT THE MODELS DO NOT FAVOR ANY
PARTICULAR PATTERN FOR PRECIPITATION FOR NOVEMBER 2008.  FOR GUIDANCE, REFER
TO NORMALS LISTED BELOW.  
**************************************************************************** 
                                   
...NOVEMBER AVERAGE STATISTICS...
                 (NORMALS AND MEANS 1971-2000)

     ...TEMPERATURE...

AVERAGE HIGH.........................  51.5
AVERAGE LOW..........................  23.5 
MONTHLY MEAN.........................  37.5 
DAYS WITH HIGH 90 OR ABOVE...........   0  
DAYS WITH HIGH 32 OR BELOW...........   3                    
DAYS WITH LOW  32 OR BELOW...........  24
DAYS WITH LOWS ZERO OR BELOW.........   0*  (* = AVG IS LESS THAN 1)      

     ...PRECIPITATION...

MONTHLY MEAN.........................   0.98 INCH  
DAYS WITH MEASURABLE PRECIPITATION...   6 
AVERAGE SNOWFALL.....................  10.7 INCHES (2ND SNOWIEST MONTH)
DAYS WITH 1.0 INCH OR MORE SNOWFALL..   3 

 **NOTE** SNOWFALL AND SUNSHINE DATA ARE COLLECTED AT THE WEATHER COOP STATION
LOCATED AT THE FORMER WEATHER SERVICE FORECAST OFFICE NEAR THE FORMER STAPLETON
INTERNATIONAL AIRPORT.

        ...MISCELLANEOUS OCTOBER AVERAGES...

HEATING DEGREE DAYS.................. 826
COOLING DEGREES DAYS.................   0
WIND SPEED (MPH).....................   8.2  
WIND DIRECTION....................... SOUTH
DAYS WITH THUNDERSTORMS..............   0* (* = AVG IS LESS THAN 1)
DAYS WITH DENSE FOG..................   1  
PERCENT OF SUNSHINE POSSIBLE.........  64 (TIED WITH MAY LEAST AMOUNT OF SUN)     

        ...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 DEGREE DAYS..  0/0 (NONE EVER RECORDED)
COLDEST..............................  22.0 DEGREES IN 1880
MAXIMUM HEATING DEGREE DAYS..........  1074 IN 2000
MINIMUM HEATING DEGREE DAYS..........   425 IN 1949
WETTEST..............................   3.21 INCHES IN 1946         
MAXIMUM 24 HOUR RAINFALL.............   1.29 INCHES IN 1975 (8-9)
DRIEST...............................   T IN 1949, 1901, 1899
SNOWIEST.............................  42.6 INCHES IN 1946 
MAXIMUM 24 HOUR SNOWFALL.............  17.7 INCHES IN 1946 (2-3)
LEAST SNOWIEST.......................   0.0 IN 1949 
                                       TRACE AMOUNTS RECORDED IN 1939, 1917,   
                                       1905, 1901, 1899, 1884
BENTON 

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