The Weather Wire

 

November 2005                                                                                                             Volume 13 Number 11

 

Contents

 

·   Winter Definitions

 

·   Online Forecasts
 

·   Drought Monitor

 

·   October

    Summary

 

·   October Stats

 

·   November  Preview

 

·   Sunrise/Sunset

 

·   Snow Totals

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

October 2005

 

Avg High 65.4

Avg Low 38.3

Snow - 9.6"

Season Snow - 9.6"

Precipitation - 2.16"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

November

Avg High 51.5

Avg Low 23.5

Avg Snow -  10.7"

Avg Precip - 0.98"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Skyview Weather 

2350 N Rocky View Rd

Castle Rock, CO 80108

 

Phone: (303) 688-9175

Fax: (303) 660-0548

 

E-mail:    

tim@skyview-wx.com

 

We’re on the Web!

http://www.skyview-wx.com/

 

Copyright 2005

Skyview Weather

Winter Weather Definitions... 

With our fist snowstorm of the season now in the books perhaps it is time to go over some winter weather facts and safety information.

The National Weather Service issues many different types of watches and warnings during the winter months.  Here is what they mean.

WINTER STORM WATCH:

A winter storm watch is issued when winter storm conditions are possible within the next 12 to 36 hours, but the timing, intensity, or occurrence may still be uncertain.

WINTER STORM WARNING:

A winter storm warning is issued when heavy snow is occurring or will develop in the next 18 hours.  The heavy snow may be accompanied by wind and blowing snow. 

BLIZZARD WARNING:

A blizzard warning is issued when the following conditions are expected for at least 3 hours:     Sustained winds of 35mph or greater with considerable falling and/or drifting snow lowering visibilities to less than 1/4 mile.  Remember, snow does not necessarily need to be falling and dangerous wind chills are often observed during blizzard events.

WINTER WEATHER ADVISORY:

A winter weather advisory for snow is issued when these general snow accumulations are expected:     Between 4 and 8 inches in 12 hours in the mountains.  Between 3 and 6 inches in 12 hours at lower elevations, such as Denver Metro.

 

A winter weather advisory for snow and blowing snow is issued when falling snow is accompanied by blowing snow to cause travel problems due to lowered visibilities and drifting snow.

 

A winter weather advisory for blowing snow is issued when wind blown snow will occasionally reduce visibilities and create a hazard for travelers.

FROST/FREEZE WARNING:

Below freezing temperatures are expected and may cause significant damage to plants, crops, or fruit trees in areas unaccustomed to freezing temperatures.  Usually issued for first frost/freeze of season and again in spring for late frost/freezes.  

HIGH WIND WARNING:

A high wind warning is issued for the following conditions:     Sustained winds of 50mph for at least 1 hour, or gusts to 75mph for any duration in the mountains and foothills.  Sustained winds of 40mph for at least 1 hour, or gusts to 58mph for any duration at lower elevations away from the foothills. 
 

We as weather forecasters use different wording or terms when we describe a snow event.  Whether it is just some flurries or a large winter storm we use different words that best suit the snow event that is expected. 

Online Forecasts Available Again

Skyview Weather is happy to announce that online forecasts and snow reports are again available on our sister www.anythingweather.com website.  Forecasts and snow reports are password protected, but an email to Tim@Skyview-WX.com requesting your forecast and/or snow reports be available online will result in an account being setup for you.  As always, forecasts and snow reports are for client use only, but with the online access, forecasts and snow reports are just a click away from any computer with an internet connection!

Drought Update

Little change in drought conditions across most of Colorado, with few areas of drought remaining..

The map below shows forecasted temperature deviances for November 2005. As can be seen, above normal  temperatures are expected for Colorado for November 2005.

The map below shows forecasted precipitation deviances for November 2005.  Normal or near normal precipitation is expected for Colorado for November 2005.

As can be seen in the below map, most of the state has come out of the widespread drought conditions of a year ago, with drought not expected to redevelopment in the near term..

October Summary

Much needed above average precipitation and near normal temperatures for the month of October.  The average temperature for the month was 51.9 degrees just about 1 degree above average.  Temperatures ranged from 89 on the first of the month to 29 degrees on the 7th and 24th.  Three temperature records were broken.  Two new record highs, both of 88 degrees on the 2nd and 3rd breaking old records of 86 and 87.  A record low max of 34 degrees on the 10th shattered the old record of 38.  For the month there were 8 days where temperatures below freezing were observed, 9 days is the norm.

There were 6 days with measurable precipitation, and single day precipitation records were broken.  This October did not rank in the top 10 wettest Octobers, but with over 2.16" of liquid equivalent this October can be considered much wetter than average.  On the 9th, 0.62" were measured breaking the old daily record of 0.35".  On the 10th 0.99" fell replacing the old daily record of 0.84.  This is the first month out of the last four where above monthly average precipitation has fallen.  Even with a wet October year to date precipitation is running a deficit of 2.23".

October Stats

TEMPERATURE (IN DEGREES F)

 

 

 

 

 

 

AVERAGE MAX

65.4

NORMAL

66.0

DEPARTURE

-0.6

AVERAGE MIN

38.3

NORMAL

35.9

DEPARTURE

2.4

MONTHLY MEAN

51.9

NORMAL

51.9

DEPARTURE

0.9

HIGHEST

89 on the 1st

LOWEST

29 on the 7th and 24th

 

 

 

 

 

 

DAYS WITH MAX 90 OR ABOVE

0

NORMAL

0

DAYS WITH MAX 32 OR BELOW

0

NORMAL

0

DAYS WITH MIN 32 OR BELOW

8

NORMAL

9

DAYS WITH MIN ZERO OR BELOW

0

NORMAL

0

 

 

 

 

 

 

TEMPERATURE RECORDS

 

New Record Highs of 88 degrees on Oct. 2nd and 3rd. Record low max on Oct. 10th of 34 degrees.  

 

 

 

 

 

 

HEATING DEGREE DAYS

 

 

 

 

 

 

MONTHLY TOTAL

415

NORMAL

436

DEPARTURE

-21

SEASONAL TOTAL

491

NORMAL

582

DEPARTURE

-91

 

 

 

 

 

 

COOLING DEGREE DAYS

 

 

 

 

 

 

MONTHLY TOTAL

14

NORMAL

0

DEPARTURE

14

YEARLY TOTAL

927

NORMAL

696

DEPARTURE

-231

 

 

 

 

 

 

PRECIPITATION (IN INCHES)

 

 

 

 

 

 

MONTHLY TOTAL

2.16

NORMAL

0.99

DEPARTURE

1.17

YEARLY TOTAL

11.97

NORMAL

14.2

DEPARTURE

-2.23

GREATEST IN 24 HOURS

1.13 on the 9th - 10th

DAYS WITH MEASURABLE PRECIPITATION

6

 

 

 

 

SNOWFALL (IN INCHES)

 

 

 

 

 

 

MONTHLY TOTAL

9.6

NORMAL

4.1

DEPARTURE

5.5

SEASONAL TOTAL

9.6

NORMAL

5.7

DEPARTURE

3.9

GREATEST IN 24 HOURS

6.2

GREATEST DEPTH

2.0

 

 

 

 

 

 

WIND (IN MILES PER HOUR)

 

 

 

 

 

 

AVERAGE SPEED

9.5

       

PEAK WIND GUST

37mph from Northwest  on the 4th

 

 

 

 

 

 

MISCELLANEOUS WEATHER

 

 

 

 

 

 

NUMBER OF DAYS WITH THUNDERSTORMS

2

NORMAL

 1

NUMBER OF DAYS WITH HEAVY FOG

3

NORMAL

 1

NUMBER OF DAYS WITH HAIL

0

 

 

PERCENT OF SUNSHINE

67

NORMAL

72

 

 

 

November Preview

Even though November is usually a tranquil month with numerous spring like days, it can also be a snow packed winter type of 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 was more than the total of any other month 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.

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%.  That compares to September that has the most sunshine with 74%.  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 4 years ago, November 1999 finished as the second warmest with an average temperature of 47.1 degrees.  And just a year later, November 2000 finished as the second coldest 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 while the warmest November occurred in 1949 with an average temperature of 50.9.

 

DENVER'S NOVEMBER CLIMATOLOGICALLY NORMAL

(NORMAL PERIOD 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

 

 

PRECIPITATION

 

 

 

MONTHLY MEAN

0.98"

DAYS WITH MEASURABLE PRECIPITATION

6

AVERAGE SNOWFALL IN INCHES

10.7"

DAYS WITH 1.0 INCH OF SNOW OR MORE

3

 

 

MISCELLANEOUS NOVEMBER AVERAGES

 

 

 

HEATING DEGREE DAYS

826

COOLING DEGREE DAYS

0

WIND SPEED (MPH)

8.2

WIND DIRECTION

SOUTH

DAYS WITH THUNDERSTORMS

0

DAYS WITH DENSE FOG

1

PERCENT OF SUNSHINE POSSIBLE

64

 

 

NOVEMBER EXTREMES

 

 

 

RECORD HIGH

79 DEGREES ON 11/14/1990

RECORD LOW

-18 DEGREES ON 11/29/1877

WARMEST

50.9 DEGREES IN 1949

COLDEST

22.0 DEGREES IN 1880

WETTEST

3.21 INCHES IN 1946

DRIEST

TR IN 1949

SNOWIEST

42.6 IN 1946

LEAST SNOWIEST

0.0 IN 1949

Sunrise/Sunset (Denver area)

     Date

Sunrise

Sunset

     November  1  

06:29

16:57

     November  5

06:33

16:53

     November 10

06:39

16:48

     November 15

06:44

16:44

     November 20

06:50

16:40

     November 25

06:56

16:38

     November 30

07:01

16:36

 Snowfall

October 2005 to April 2006

City

Oct

Nov

Dec

Jan Feb Mar Apr

Seasonal Totals

Aurora (Central)

12.0             12.0

Castle Rock 4 NE

12.5             12.5

Colorado Springs

 TR              TR
Denver Stapleton 9.6              9.6

Denver Downtown

3.5             3.5

Golden

0.9              0.9

Highlands Ranch

7.5              7.5

Lakewood

2.0              2.0

Littleton

2.0              2.0

Louisville

0.0              0.0

Parker

11.0              11.0

Sedalia

13.0              13.0

Thornton

0.0              0.0

Westminster

1.0              1.0

Wheatridge

3.6              3.6