Tag Archives: November weather

November 18 to November 24 – This Week in Denver Weather History

This Week In Denver Weather History
November 18 to November 24 - This Week in Denver Weather History

Powerful winds and heavy snow make up the majority of significant weather events in our look back at this week in Denver weather history.

From the National Weather Service:

14-18

In 1964…the first measurable snowfall of the season totaled 6.0 inches at Stapleton International Airport where northeast winds gusted to 32 mph on the 14th. Most of the snow…4.2 inches…fell on the 14th. This was the only measurable snow of the month.

16-18

In 1921…heavy snowfall totaled 6.5 inches over downtown Denver. This was the only measurable snow of the month. East winds were sustained to 14 mph on the 17th.

17-18

In 1869…the heaviest wind storm in 5 or 6 years raked the eastern foothills including Boulder…Denver…Georgetown… And Golden. Some hundreds of dollars in damage occurred in Boulder.

18

In 1872…fresh west winds contributed to the relative humidity dipping to zero at 2:43 pm. The maximum temperature was 54 degrees.

In 1907…heavy snowfall totaled 6.0 inches over downtown Denver. Snow fell all day. North winds were sustained to 19 mph.

In 1915…northwest winds were sustained to 42 mph with gusts as high as 48 mph. It was windy most of the day.

In 1996…high winds struck the foothills west of Denver. Wind gusts ranged from 70 to 75 mph. A few power lines were downed…but no major outages were reported.

In 1998…strong downslope winds developed during the morning. Wind gusts reached a peak of 72 mph at Jefferson County Airport near Broomfield. West winds gusted to 41 mph at Denver International Airport.

In 1999…high winds developed in and near the Front Range foothills. The strong winds downed power lines…which sparked several small brush fires. In Broomfield… Scaffolding was damaged at the Wadsworth Recreation Center…while flying rocks broke several windows at a local bank building. Peak wind gusts included: 91 mph atop Blue Mountain near Wondervu…88 mph atop the Gamow Tower on the University of Colorado campus in Boulder… 83 mph at Jefferson County Airport…81 mph at the National Center for Atmospheric Research mesa lab above Boulder…and 80 mph at Wondervu. West-northwest winds gusted to 48 mph at Denver International Airport.

18-19

In 1975…snowfall totaled only 5.5 inches and north winds gusted to 35 mph causing some blowing snow at Stapleton International Airport…while a major blizzard struck southeastern Colorado.

In 1985…4 to 7 inches of snow fell across metro Denver. Snowfall totaled 4.4 inches at Stapleton International Airport where north winds gusted to 23 mph.

In 1991…another strong winter storm produced heavy snow over metro Denver. Snowfall totaled 9.5 inches at Stapleton International Airport with 9 inches at Parker… And 8 inches in southeast Denver…Morrison…and Wheat Ridge. This second storm brought the 5 day (15th-19th) snowfall total at Stapleton International Airport to 21.1 inches. The greatest depth of snow on the ground was 13 inches on the morning of the 19th. The adverse effects of the two storms were diminished by the lack of significant winds.

Continue reading November 18 to November 24 – This Week in Denver Weather History

November 11 to November 17 – This Week in Denver Weather History

This Week In Denver Weather History
November 11 to November 17 - This Week in Denver Weather History

Two conditions seem to dominate Denver weather this time of year – snow and wind. Both of those make numerous appearances in our look back at this week in Denver weather history.

From the National Weather Service:

10-11

In 1911…a strong cold front produced snow and a cold wave. The temperature dropped 68 degrees from a high of 66 degrees at 12:40 pm on the 10th to a low of 2 degrees below zero at 7:15 am on the 11th. The low temperature of 23 degrees at midnight on the 10th was also the high temperature on the 11th. Northeast winds were sustained to 42 mph with gusts to 51 mph. Snowfall was only 2.5 inches.

In 1982…up to 4 inches of snow fell over the higher terrain between Denver and Colorado springs. Winds gusted to 50 mph along the foothills. Rainfall totaled 0.27 inch with only 0.1 inch of snow on the 11th at Stapleton International Airport where north winds gusted to 39 mph. Dense fog with visibilities as low as zero persisted all day on the 10th.

11

In 1901…a trace of rain fell in the morning…and a trace of snow fell in the afternoon. This was the only snowfall and precipitation for the month…ranking it the driest November on record…along with November of 1899 and 1949. The month also ranks as the second least snowiest November…along with Novembers in other years.

In 1903…northwest winds sustained to 45 mph with gusts to 56 mph warmed the temperature to a high of 56 degrees.

In 1912…rain changed to snow…which became heavy…and totaled 6.5 inches over downtown Denver. Precipitation was 1.02 inches…the greatest calendar day precipitation ever recorded in November. Northeast winds were sustained to 27 mph with gusts to 29 mph.

In 1919…light snow fell from an apparent clear sky during the early afternoon. The first snow was observed at about 12:40 pm and continued at least 30 minutes before clouds could be seen forming…followed by the sky becoming totally cloudy. During this time the temperature fell from 50 degrees at noon to only 18 degrees at 100 pm and plunged to 6 degrees at 5:45 pm. A low temperature of 2 degrees was recorded overnight. Northeast winds were sustained to 33 mph with gusts to 36 mph between noon and 1:00 pm behind an apparent arctic cold front. Snowfall was only 0.1 inch.

In 1949…north winds gusted to 50 mph at Stapleton Airport. A trace of rain fell. Another trace of rain on the 15th was the only precipitation of the month…making the month one of the driest Novembers on record and the least snowiest with no snow. This was the first November since 1882 without snow.

In 1959…strong northwest winds struck Boulder and the foothills causing some damage. West winds gusted to 37 mph at Stapleton Airport.

In 1995…strong downslope winds gusting to 84 mph blew out a few car windows in Boulder County. Winds gusted to 69 mph at Golden…Lakewood…and Table Mesa in Boulder. West-northwest winds gusted to 43 mph at Denver International Airport.

In 2000…heavy snow occurred in the foothills southwest of Denver and over Monument Ridge south of Denver. Snowfall totals included: 6.5 inches near Parker… 6 inches near Bergen Park…5 inches at Genesee and near Sedalia…and 4 inches at Coal Creek Canyon and St. Mary’s glacier. Snowfall totaled 1.6 inches at the site of the former Stapleton International Airport.

In 2003…strong downslope winds developed along the Front Range. Peak wind reports included 91 mph atop Blue Mountain near Wondervu and 75 mph in Boulder. Damaging winds downed power lines in Boulder County. North of Golden…a semi-truck was blown over by the winds near the intersection of State Highways 72 and 93 atop Rocky Flats. At the same location…blowing rocks shattered several car windows at an RTD Park and Ride. West winds gusted to 40 mph at Denver International Airport.

Continue reading November 11 to November 17 – This Week in Denver Weather History

November 4 to November 10 – This Week in Denver Weather History

This Week In Denver Weather History
November 4 to November 10 - This Week in Denver Weather History

Our look back at this week in Denver weather history is shorter than what we often see which shows the normally quiet weather we see in November. However there are still significant weather events in the past, most of which involved heavy snow and powerful winds.

From the National Weather Service:

2-5

In 1946…a major snow storm dumped 30.4 inches of heavy snowfall downtown and 31.0 inches at Stapleton Airport. The winter storm closed schools and disrupted all forms of transportation in the city. The greatest depth of snow on the ground was 28 inches at the airport. The duration of the snowfall…from 4:22 am on the 2nd to 3:08 am on the 5th… A total of 70 hours and 46 minutes…is the second longest period of continuous precipitation on record and the second heaviest snowfall of record at the time in Denver. The 17.7 inches of snowfall on the 2nd and 3rd was the greatest 24- hour snowfall ever recorded during the month of November. Buses and street cars had a difficult time…and many cars were abandoned along roadsides and streets for several days. Secondary roads in rural areas were blocked for 2 to 3 weeks. Several buildings in the city collapsed or were damaged from the weight of the heavy snow. Football games were canceled. Livestock losses were high over eastern Colorado. The precipitation from this storm alone exceeded the greatest amount ever recorded in Denver during the entire month of November previously. The precipitation recorded downtown was 2.03 inches…and the previous record for the entire month of November was 1.95 inches in 1922. North winds were sustained to 26 mph on the 2nd.

3-4

In 1994…a fast moving snow storm dumped 8 to 9 inches of snow on Boulder…Broomfield…and Lafayette. Snowfall totaled only 1.8 inches at Stapleton International Airport where on the 3rd east winds gusted to 20 mph and some freezing drizzle fell.

4

In 1940…a trace of snow fell in downtown Denver. This marked the start of the shortest snow season on record… 167 days…through April 19…1941…when 0.4 inch of snow fell.

In 1959…high winds caused damage in many areas of the eastern plains.

In Denver…winds averaged 40 mph with gusts to 70 mph. Some damage was reported to utility lines…signs…and vehicles. Northeast winds were sustained to 30 mph at Stapleton Airport.

4-5

In 1933…the first measurable snow of the season totaled only 2.5 inches. This was the only measurable snow of the month. Northwest winds were sustained to 27 mph on the 4th.

In 1951…heavy snowfall of 5.7 inches was measured at Stapleton Airport where northwest winds gusted to 32 mph.

5

In 1896…west Chinook winds sustained to 44 mph with gusts to 46 mph warmed the temperature to a high of 56 degrees in the city.

In 1919…a rare November thunderstorm produced a mixture of rain and snow during the evening. Precipitation totaled only 0.14 inch with only a trace of snow. Northeast winds were sustained to 39 mph with gusts to 44 mph.

In 1948…a west-northwest wind gust to 50 mph was recorded at Stapleton Airport.

In 1994…winds gusted to 76 mph on the summit of Squaw Mountain…5 miles south of Idaho Springs.

In 2000…snow fell in the foothills west of Denver and across the southern suburbs. Snow totals included 6 inches near Evergreen…11 miles southwest of Morrison… And 7 miles south of tiny town and 5 inches in Aurora and Parker. Snowfall totaled 5.5 inches at the site of the former Stapleton International Airport. Northeast winds gusted to 26 mph at Denver International Airport where the visibility was reduced to 1/4 mile in heavy snow at times.

Continue reading November 4 to November 10 – This Week in Denver Weather History

October 28 to November 3 – This Week in Denver Weather History

This Week In Denver Weather History
October 28 to November 3 - This Week in Denver Weather History

As we move further into fall, we see the predominant significant weather in our history during the period involves snowstorms.

From the National Weather Service:

27-28

In 1874…strong west winds in Boulder along with a reported tornado produced 150 dollars in damage.

In 1913…a strong cold front produced sustained northeast winds to 35 mph with gusts as high as 38 mph on the 27th. Overnight snowfall totaled 5.8 inches. Temperatures plunged to a low of 17 degrees on the morning of the 28th after a high of 60 degrees on the 27th.

27-30

In 2009…a powerful early season storm brought heavy snow to the Front Range. The combination of a deep northeasterly upslope flow coupled with abundant moisture and lift with the developing storm system produced an extended period of moderate to heavy snowfall. The heavy wet snow accumulated on trees and resulted in broken branches and scattered electrical outages. Interstates 70 and 76 were closed east of Denver. Numerous other roads and highways were shut down. The Red Cross set up numerous emergency shelters for stranded travelers. The blowing snow at Denver International Airport forced the cancellation of hundreds of flights. Schools were also closed. In the foothills storm totals included: 46 inches… 3 miles southeast of Pinecliffe; 42 inches…3 miles southwest of conifer; 34 inches…3 miles north of Blackhawk; 30 inches at Aspen Springs and near Evergreen… 23 inches at Roxborough Park…and 20 inches…3 miles south-southeast of Morrison. Across the urban corridor storm totals included: 25 inches in Highlands Ranch; 21.5 inches near Louisville…20.5 inches in Broomfield… 20 inches at Lafayette…17.5 inches in Boulder…17 inches in Westminster…16.5 inches in Erie; 15.5 inches in Arvada and 5 miles west-northwest of Littleton…15 inches in Littleton…14 inches in Englewood…13.5 inches in Lakewood and 6 miles north of Thornton; 13.3 inches at Denver International Airport…11 inches…4 miles south of Denver; 10.5 inches…2 miles north of Cherry Hills Village and Niwot.

28

In 1917…post-frontal snowfall totaled 6.5 inches in the city. North winds sustained to 30 mph with gusts to 33 mph caused the temperature to plunge from a high of 58 degrees to a low of 9 degrees by midnight.

In 1967…winds gusted to 65 mph in downtown Boulder…causing minor damage. South winds gusted to 32 mph at Stapleton International Airport.

In 1991…the first major snow of the season hit metro Denver as a cold arctic air mass moved over the area. Snowfall amounts across northeast Colorado ranged from 3 to 10 inches with 4.4 inches of snowfall recorded at Stapleton International Airport where north winds gusted to 22 mph. The low temperature dipped to 13 degrees.

In 1993…high winds buffeted the Front Range foothills. A wind gust to 83 mph was recorded atop Squaw Mountain…35 miles west of Denver…and a gust to 76 mph occurred near Rollinsville southwest of Boulder.

28-29

In 1993…an upper level disturbance combined with a moist upslope flow to bring heavy snow to portions of metro Denver. Snowfall amounts ranged from 5.4 inches at Stapleton International Airport to 14 inches in Boulder. New snowfall totaled 8 inches at Gross Reservoir in the foothills 5 miles southwest of Boulder. On the 28th…north winds gusted to 30 mph at Stapleton International Airport where the temperature climbed to only 25 degrees on the 29th…equaling the record low maximum for the date.

Continue reading October 28 to November 3 – This Week in Denver Weather History

November 2011 Thornton weather recap: A cold and snowy start ends warm and dry

When the month of November 2011 began we seemed to be headed toward a very wintry month.  Despite that cold start however, the weather soon turned much more moderate.

The first three days of the month yielded 4.5 inches of snow as officially measured at Denver International Airport.  That total however was far less than what was seen in the rest of the metro area.  For comparison, here in Thornton we recorded 7.9 inches.

Over those same three days the month saw a chilly average temperature of 27.8 degrees which was  16.5 degrees below normal.  The low pressure trough and cold front that generated the cold and snow however would soon be gone and nothing but a memory.

From November 4th through the end of the month the weather turned mild and dry.  No measurable precipitation was recorded for the balance and by the end of the month the average temperature had climbed to above normal.

The month ended with an average temperature of 39.5 degrees which was 1.2 degrees above normal.  Thornton was a touch cooler with an average of 38.8 degrees.

Highs ranged from 69 degrees on the 24th to a low of 10 degrees on the 2nd and the 3rd at DIA.  Here in Thornton we were milder with a high of 72.0 degrees and a low of 14.1 degrees.

The early month snowstorms yielded 0.47 inches of precipitation at the airport versus the November average of 0.61 inches.  The 4.5 inches of snowfall was well below the normal of 8.7 inches for November.

Click here to view the Thornton climatological summary for November 2011.  Below is the official Denver summary from the National Weather Service.

CLIMATE REPORT
NATIONAL WEATHER SERVICE BOULDER, CO
645 AM MST THU DEC 1 2011

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

...THE DENVER CO CLIMATE SUMMARY FOR THE MONTH OF NOVEMBER 2011... 

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1872 TO 2011

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................ 
TEMPERATURE (F)
RECORD
 HIGH              80   11/08/2006
 LOW              -18   11/29/1877
HIGHEST            69   11/24        80     -11       77  11/06
LOWEST             10   11/02       -18      28        4  11/25
                        11/03
AVG. MAXIMUM     54.1              52.1     2.0     52.6
AVG. MINIMUM     24.8              24.5     0.3     24.0
MEAN             39.5              38.3     1.2     38.3
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX = .01         2               4.7    -2.7        5
DAYS >= .10         2               1.6     0.4        2
DAYS >= .50         0               0.0     0.0        0
DAYS >= 1.00        0               0.0     0.0        0
GREATEST
 24 HR. TOTAL    0.47   11/01 TO 11/02           11/16 TO 11/16
                                                          11/08 TO 11/09
                                                          11/09 TO 11/09
 STORM TOTAL       MM                                 MM
 (MM/DD(HH))            MM                    11/16(00) TO 11/16(00)
                                                 11/09(00) TO 11/09(00)9
                                                 11/09(00) TO 11/09(00)9

SNOWFALL (INCHES)
RECORDS
 TOTAL             MM   MM
TOTALS            4.5                MM

DEGREE_DAYS
HEATING TOTAL     757               801     -44      793
 SINCE 7/1       1252              1377    -125     1128
COOLING TOTAL       0                 0       0        0
 SINCE 1/1        964               769     195      870

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

WIND (MPH)
AVERAGE WIND SPEED              9.9
RESULTANT WIND SPEED/DIRECTION   3/229
HIGHEST WIND SPEED/DIRECTION    43/260    DATE  11/12
HIGHEST GUST SPEED/DIRECTION    52/260    DATE  11/12

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR            7
NUMBER OF DAYS PC             23
NUMBER OF DAYS CLOUDY          0

AVERAGE RH (PERCENT)     45

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                3     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                2     SNOW                       2
LIGHT SNOW                2     SLEET                      0
FOG                       3     FOG W/VIS

Thornton snowstorm and news updates

Old Man Winter is staged to arrive in Colorado in a big way.  With snow and arctic cold set to arrive, the next 48 hours are going to be interesting and in fact, the cold looks to last through the weekend.

For all the latest with the storm, be sure to check our Winter Weather Briefing page.

We will be providing updates as needed on our Google+ and Facebook pages as well.  We realize however that many folks don’t belong to those social networks.  You can follow along instead using the embedded Facebook ticker below if that is the case.

  • Remember, when the snow starts flying, stay up to date with ThorntonWeather.com: ‘Like’ us on Facebook, follow us on Twitter and add us to your Google+ circles

Hurricane-force winds hit Colorado’s high country, foothills

Hurricane-force winds pounded the Colorado high country on Saturday, November 12, 2011.
Hurricane-force winds pounded the Colorado high country on Saturday, November 12, 2011. Click the image for a larger view.

Fed by a strong jet streak roaring above the Colorado Rocky Mountains, a mountain wave setup over the western half of the state yesterday.  Strong winds were the result and were combined with heavy snow in the central and northern mountains.

The incredibly strong winds that would be the equivalent of a Category 3 hurricane ripped through Colorado’s high country in the past 24 hours.  Many locations reported gusts in excess of 100mph downing power lines and trees and creating hazardous driving conditions.

The top wind gust reported by the National Weather Service was 115mph south of Frisco in Summit County.

Berthoud Pass saw a 113mph gust at the Mines Peak Summit (12,500 feet) with sustained winds to 86mph.  After sending that reading, the station’s anemometer (wind sensor) broke.

Other locations recording gusts near 100mph included Loveland Pass at 100mph and Kenosha Pass recorded 101mph.   Berthoud in Larimer County saw 99mph and the National Center for Atmospheric Research Mesa lab in Boulder recorded 90mph.

Here in Thornton we thankfully didn’t see winds nearly that fast however ours were notable.  We recorded a 38mph gust Saturday afternoon and a 47mph gust shortly after midnight Sunday morning.

High winds like these, while quite strong, are not entirely unusual.  Dangers from these powerful winds include power outages, flying debris, collapsed structures and the potential to overturn vehicles.  Learn more in our story, Winter weather preparedness: The threat of high winds in Colorado.

Below is a water vapor satellite showing the mountain waves as the moved across the southern part of Colorado.

Stay up to date with all the latest Colorado weather:

Water vapor satellite imagery shows the mountain waves that existed across much of southeastern Colorado and northeastern New Mexico around 19:45 UTC on 12 November 2011. (CIMSS)
Water vapor satellite imagery shows the mountain waves that existed across much of southeastern Colorado and northeastern New Mexico around 19:45 UTC on 12 November 2011. (CIMSS)

 

Thornton gets second snowstorm in a week

ThorntonWeather.com's east camera captured the storm at its height early Tuesday morning.
ThorntonWeather.com's east camera captured the storm at its height early Tuesday morning.

After weeks of what some would call boring weather, Thornton saw things change considerably over the past week.  Not one, but two snowstorms have hit the city getting us 2/3 of the way to the snow total we had for all of last season.

Here in Thornton we measured 6.6 inches with last week’s snowstorm and today’s added 7.9 inches.  That brings us to a seasonal total of 14.5 inches.

For comparison, the last season was absolutely dismal and we only received 21.2 inches over the entire period.  On average Denver receives 61.7 inches during a season.

The most recent storm prompted Winter Storm Warnings as the snow fell quickly after dark and lasted into the morning. The ground was much colder this time and aided by wind, it accumulated on roads unlike last week’s storm which saw the snow melt as quick as it fell.

While the morning commute was a mess and slow moving, it was relatively uneventful.  Much to the chagrin of local students, most school districts remained open for the day.  The sun started making an appearance after noon and by the evening a good bit of blue sky was above.

Below are time lapse videos taken from our two webcams of the storm.  They cover the 18 hour period from 6:00pm on November 1 to 12:00pm on November 2.

 

Thornton’s November weather preview – Our second snowiest and least sunny month

A look ahead at Thornton's November weather.Typically November is a quiet weather month with plenty of nice, fall days but it can also turn wet with plenty of snow and moisture.  Just like Forest Gump’s proverbial box of chocolates, you never quite know what you are going to get.

Looking into the weather history books, we see that November is actually Denver’s second snowiest month, second only to March (April is third).  Historically we average 10.7 inches of snow during the month.

One little known fact…  November is the area’s least sunny month, tying with May with only 64 percent sunshine.  September is the sunniest month with sunshine 74 percent of the time.

Get all the details on Denver’s November weather including a look back through history, a recap of last year and the statistics in our November weather preview.

Thornton’s November weather recap – Month ends drier and warmer than normal

November 2010 goes down in the books as drier and warmer than normal.  (iStockphoto / johnnyscriv)
November 2010 goes down in the books as drier and warmer than normal. (iStockphoto / johnnyscriv)

November 2010 was most notable not for what weather condition occurred but rather for what it lacked – snow.  Historically November is Denver’s second snowiest month but 2010 saw us receive very little of the white stuff as we start out the season far behind where we average.

At the official Denver weather monitoring station at Denver International Airport a mere 1.5 inches of the white stuff was recorded.  That is 9.2 inches below the historical November average of 10.7 inches.  Despite that, the month fell short of the top 10 least snowiest Novembers as number 10 on that list is 1971 with 1.4 inches.  Given that no snow was recorded in September or October, the 2010 snow season is off to a dismal start at more than 15 inches below normal.

In terms of precipitation, only 0.5 inch was collected in the rain bucket – barely more than half of the normal of 0.98 inch.  While dry, it wasn’t enough to put the month into top 10 driest November status.  Three years in Denver history have recorded only a trace of precipitation and the number 10 slot is held by 1989 when only 0.15 inch of precipitation was recorded.  No precipitation or snowfall records were set or tied during the month.

Here in Thornton we fared drier than the official Denver tallies on all fronts.  We recorded only 1.14 inches of snow and 0.33 inch of precipitation.

Temperature-wise Denver ended the month warmer than normal with an average temperature of 38.3 degrees.  This was 0.8 degrees above the normal of 37.5 degrees.  Temperatures ranged from a high of 77 degrees on the 6th down to a low of 4 degrees on the 25th.  There were 24 days with low temperatures below the freezing mark which is normal.  On only one day, the 29th, did we fail to hit a high temperature of at least freezing as the thermometer only climbed to 31 degrees that day.  No temperature records were set or tied during the month.

Overall Thornton’s average temperature for the month was cooler than Denver’s.  The average temperature was 36.8 degrees with the warmest day hitting 78.7 degrees and the lowest temperature being 9.0 degrees.

Wind is of course a fact of life on the plains and November 2010 did set a new peak wind gust for the month of 55 mph on the 16th.  This easily broke the old record of 49 mph set in 1990.

Click here to view the 2010 Thornton Climate Summary.

CLIMATE REPORT
NATIONAL WEATHER SERVICE BOULDER, CO
745 AM MST FRI DEC 3 2010

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

...THE DENVER CO CLIMATE SUMMARY FOR THE MONTH OF NOVEMBER 2010... 

CLIMATE NORMAL PERIOD 1971 TO 2000
CLIMATE RECORD PERIOD 1872 TO 2010

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              80   11/08/2006
 LOW              -18   11/29/1877
HIGHEST            77   11/06        79      -2       77  11/05
LOWEST              4   11/25       -18      22       16  11/16
AVG. MAXIMUM     52.6              51.5     1.1     56.4
AVG. MINIMUM     24.0              23.5     0.5     28.8
MEAN             38.3              37.5     0.8     42.6
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX = .01         6               5.6     0.4        3
DAYS >= .10         2                MM      MM        3
DAYS >= .50         0                MM      MM        0
DAYS >= 1.00        0                MM      MM        0
GREATEST
 24 HR. TOTAL    0.15 11/16 TO 11/16         0.33 11/14 TO 11/15

SNOWFALL (INCHES)
RECORDS
 TOTAL           42.6  1946
TOTALS            1.5               10.7

DEGREE_DAYS
HEATING TOTAL     793               826     -33      664
 SINCE 7/1       1128              1408    -280     1479
COOLING TOTAL       0                 0       0        0
 SINCE 1/1        870               696     174      533

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

WIND (MPH)
AVERAGE WIND SPEED              9.7
RESULTANT WIND SPEED/DIRECTION   2/228
HIGHEST WIND SPEED/DIRECTION    45/310    DATE  11/16
HIGHEST GUST SPEED/DIRECTION    55/320    DATE  11/16

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM

NUMBER OF DAYS FAIR            9
NUMBER OF DAYS PC             17
NUMBER OF DAYS CLOUDY          4

AVERAGE RH (PERCENT)     51

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       1
LIGHT RAIN                2     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                1     SNOW                       4
LIGHT SNOW                9     SLEET                      0
FOG                      13     FOG W/VIS