The Weather Wire

 

November 2008                                                                                                            Volume 16 Number 11

 

Contents

 

 

 
·   Watches and Warnings
 

·   Drought Monitor

 

·   October

    Summary

 

·   October Stats

 

·   November Preview

 

·   Sunrise/Sunset

 

·   Snow Totals

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October 

Avg High - 66.2

Avg Low - 37.9

Snow - Trace

Season Snow - Trace

Precipitation - 1.44"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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) 380-3338

 

E-mail:    

tim@skyview-wx.com

 

We’re on the Web!

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

 

Copyright 2008

Skyview Weather

Watches and Warnings

It is that time of year again for everybody to become well versed in the winter weather watches and warnings that will issued by NWS once the snow begins to fly.  All of our clients are updated to these watches and warnings, so it is important to know what each means and how it may be relevant to you and your business.  Below are definitions of commonly used winter weather watches and warnings:

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.
A WINTER STORM WARNING IS ISSUED WHEN HEAVY SNOW IS OCCURRING OR WILL DEVELOP IN THE NEXT 18 HOURS. THE HEAVY SNOW WILL BE ACCOMPANIED BY WIND GREATER THAN 15 MPH AND BLOWING SNOW.
A HEAVY SNOW WARNING IS ISSUED WHEN HEAVY SNOW IS OCCURRING OR WILL DEVELOP WITHIN THE NEXT 18 HOURS. WINDS ARE EXPECTED TO BE LESS THAN 15 MPH DURING A HEAVY SNOW WARNING.
A BLIZZARD WATCH IS ISSUED WHEN BLIZZARD CONDITIONS ARE POSSIBLE IN THE NEXT 12-18 HOURS.
A BLIZZARD WARNING IS ISSUED WHEN THE FOLLOWING CONDITIONS ARE EXPECTED FOR AT LEAST 3 HOURS: SUSTAINED WINDS OF 35 MPH OR GREATER CONSIDERABLE FALLING AND/OR DRIFTING SNOW LOWERING VISIBILITIES TO LESS THAN 1/4 MILE.
A WIND CHILL WATCH IS ISSUED WHEN WIND CHILL WARNING CRITERIA ARE POSSIBLE IN THE NEXT 12 TO 18 HOURS.
A WIND CHILL WARNING IS ISSUED FOR WIND CHILLS OF AT LEAST -25 DEGREES ON THE PLAINS, AND -35 DEGREES IN THE MOUNTAINS.
A SNOW ADVISORY IS ISSUED WHEN GENERAL SNOW ACCUMULATIONS ARE EXPECTED:
BETWEEN 4 AND 8 INCHES IN 12 HOURS IN THE MOUNTAINS...AND BETWEEN 3 AND 6 INCHES IN 12 HOURS AT LOWER ELEVATIONS.
A SNOW AND BLOWING SNOW ADVISORY IS ISSUED WHEN FALLING SNOW IS ACCOMPANIED BY BLOWING SNOW TO CAUSE TRAVEL PROBLEMS DUE TO LOWER VISIBILITIES AND DRIFTING SNOW.
A BLOWING SNOW ADVISORY IS ISSUED WHEN WIND BLOWN SNOW WILL OCCASIONALLY REDUCE VISIBILITIES AND CREATE A HAZARD FOR TRAVELERS.
A DENSE FOG ADVISORY IS ISSUED WHEN WIDESPREAD FOG WILL REDUCE VISIBILITIES TO 1/4 MILE OR LESS.
A WINTER WEATHER ADVISORY IS ISSUED FOR FREEZING DRIZZLE OR A MIX OF PRECIPITATION TYPES (SUCH AS SNOW AND SLEET) THAT WILL IMPACT TRAVEL CONDITIONS.
A WIND CHILL ADVISORY IS ISSUED WHEN WIND AND TEMPERATURE COMBINE TO PRODUCE WIND CHILL VALUES OF 18 DEGREES BELOW ZERO TO 25 DEGREES BELOW ZERO.
THERE ARE OTHER NWS ADVISORIES, BUT THEY ARE RARELY USED HERE IN COLORADO.  TO SEE ALL THE WINTER WEATHER WATCHES, WARNINGS, AND ADVISORIES VISIT:  
http://www.crh.noaa.gov

 

Drought Update

Areas of drought are spreading across much of eastern Colorado as a result of our precipitation deficit year to date.  Far northwestern Colorado has seen an increase in drought conditions as well.

The map below shows forecasted temperature deviances for November 2008. As can be seen, it is expected that all of Colorado to have normal temperatures for the month of November 2008. 

The map below shows forecasted precipitation deviances for November 2008.  Normal precipitation is anticipated for all of Colorado.

Drought conditions are expected to improve across southeastern Colorado over the next 3 months, with no change expected other area of the state.

October Summary

October of 2008 was above normal in precipitation for a change and near normal in temperatures.  In the middle of the month there was a cold spell that promised to bring some snow to Denver, but never did.  The end of the month could not have been any nicer with well above normal temperatures and abundant sunshine.  As a whole the monthly mean temperature was 52.1 degrees which is about 1 degree above normal.  Thankfully the month ended up with above normal precipitation with 1.44" compared to 0.99" normally.  This will help cut into the deficit, but we are still 3.89" below average for the year.  Without any snow so far this fall in Denver we are already behind more than 6" for the season.

October Stats

TEMPERATURE (IN DEGREES F)

 

 

 

 

 

 

AVERAGE MAX

66.2

NORMAL

66.0

DEPARTURE

0.2

AVERAGE MIN

37.9

NORMAL

35.9

DEPARTURE

2.0

MONTHLY MEAN

52.1

NORMAL

51.0

DEPARTURE

1.1

HIGHEST

81 on the 1st and 2nd

LOWEST

23 on the 27th

 

 

 

 

 

 

DAYS WITH MAX 90 OR ABOVE

0

NORMAL

0.0

DAYS WITH MAX 32 OR BELOW

0

NORMAL

0.3

DAYS WITH MIN 32 OR BELOW

6

NORMAL

8.6

DAYS WITH MIN ZERO OR BELOW

0

NORMAL

0

 

 

 

 

 

 

TEMPERATURE RECORDS

 

No records tied or broken.

 

 

 

 

 

 

 

HEATING DEGREE DAYS

 

 

 

 

 

 

MONTHLY TOTAL

393

NORMAL

436

DEPARTURE

-43

SEASONAL TOTAL

537

NORMAL

582

DEPARTURE

-45

 

 

 

 

 

 

COOLING DEGREE DAYS

 

 

 

 

 

 

MONTHLY TOTAL

0

NORMAL

0

DEPARTURE

0

YEARLY TOTAL

825

NORMAL

696

DEPARTURE

129

 

 

 

 

 

 

PRECIPITATION (IN INCHES)

 

 

 

 

 

 

MONTHLY TOTAL

1.44

NORMAL

0.99

DEPARTURE

0.45

YEARLY TOTAL

9.79

NORMAL

13.68

DEPARTURE

-3.89

GREATEST IN 24 HOURS

1.06" on the 5th

DAYS WITH MEASURABLE PRECIPITATION

5

 

 

 

 

 

SNOWFALL (IN INCHES)

 

 

 

 

 

 

MONTHLY TOTAL

TR

NORMAL

4.1

DEPARTURE

-4.1

SEASONAL TOTAL

TR

NORMAL

6.2

DEPARTURE

-6.2

GREATEST IN 24 HOURS

N/A

GREATEST DEPTH

N/A

 

 

 

 

 

 

WIND (IN MILES PER HOUR)

 

 

 

 

 

 

AVERAGE SPEED 9.6mph

PEAK WIND GUST

49mph from the north

 

 

 

 

 

 

MISCELLANEOUS WEATHER

 

 

 

 

 

 

NUMBER OF DAYS WITH THUNDERSTORMS

3

NORMAL

1

NUMBER OF DAYS WITH HEAVY FOG

1

NORMAL

1

NUMBER OF DAYS WITH HAIL

0

 

 

PERCENT OF SUNSHINE

73%

NORMAL

72%

 

 

 

November Preview

The start of the snow season for the Denver Metro area will be upon us this month.  November is typically the 2nd snowiest month in Denver with 10.7" on average.  I think it is safe to say that Denver will experience its first snow of the season this month as the weather pattern is becoming much more active after the tranquil weather we had during the last part of October and the early part of November.  There can be periods of warm weather, but it is usually short lived and even the warmest days stay in the 70s.  Sunshine is less abundant as there is on average only 64% sunshine which is tied with May for the lowest of any month during the year.  Get the snow shovels ready it is about time for some real snow!             

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

Less than 1

 

 

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 AVERAGES

 

 

 

HEATING DEGREE DAYS

826

COOLING DEGREE DAYS

0

WIND SPEED (MPH)

8.2mph

WIND DIRECTION

South

DAYS WITH THUNDERSTORMS

Less than 1

DAYS WITH DENSE FOG

1

PERCENT OF SUNSHINE POSSIBLE

64%

 

 

EXTREMES

 

 

 

RECORD HIGH

80 on 11/8/2006

RECORD LOW

-18 on 11/29/1877

WARMEST

50.9 in 1949

COLDEST

22.0 in 1880

WETTEST

3.21" in 1946

DRIEST

Trace in 1949, 1901, 1889

SNOWIEST

42.6" in 1946

LEAST SNOWIEST

0.0 in 1949
 

Sunrise/Sunset (Jul - December Denver area)

             JUL                 AUG            SEP               OCT              NOV               DEC
______________________________________________________________________________
            sr - ss           sr - ss           sr - ss            sr - ss            sr - ss           sr - ss
 01  0536-0831 | 0559-0813 | 0628-0731 | 0656-0643 | 0729-0557 | 0702-0436  01
 02  0536-0831 | 0600-0812 | 0629-0730 | 0657-0641 | 0630-0456 | 0703-0435  02
 03  0537-0831 | 0601-0811 | 0630-0728 | 0658-0639 | 0631-0455 | 0704-0435  03
 04  0537-0831 | 0602-0810 | 0631-0727 | 0659-0638 | 0632-0454 | 0705-0435  04

 05  0538-0831 | 0603-0809 | 0632-0725 | 0700-0636 | 0633-0453 | 0706-0435  05
 06  0538-0830 | 0604-0807 | 0633-0723 | 0701-0635 | 0634-0452 | 0707-0435  06
 07  0539-0830 | 0604-0806 | 0634-0722 | 0702-0633 | 0636-0451 | 0708-0435  07
 08  0540-0830 | 0605-0805 | 0634-0720 | 0703-0632 | 0637-0450 | 0708-0435  08

 09  0540-0829 | 0606-0804 | 0635-0719 | 0704-0630 | 0638-0449 | 0709-0435  09
 10  0541-0829 | 0607-0803 | 0636-0717 | 0705-0628 | 0639-0448 | 0710-0435  10
 11  0542-0829 | 0608-0801 | 0637-0715 | 0706-0627 | 0640-0447 | 0711-0435  11
 12  0542-0828 | 0609-0800 | 0638-0714 | 0707-0625 | 0641-0446 | 0712-0435  12

 13  0543-0828 | 0610-0759 | 0639-0712 | 0708-0624 | 0642-0445 | 0712-0436  13
 14  0544-0827 | 0611-0758 | 0640-0710 | 0709-0622 | 0644-0444 | 0713-0436  14
 15  0544-0827 | 0612-0756 | 0641-0709 | 0710-0621 | 0645-0443 | 0714-0436  15
 16  0545-0826 | 0613-0755 | 0642-0707 | 0711-0619 | 0646-0443 | 0714-0437  16

 17  0546-0826 | 0614-0753 | 0643-0706 | 0712-0618 | 0647-0442 | 0715-0437  17
 18  0547-0825 | 0615-0752 | 0644-0704 | 0713-0617 | 0648-0441 | 0716-0437  18
 19  0548-0824 | 0616-0751 | 0645-0702 | 0715-0615 | 0649-0441 | 0716-0438  19
 20  0548-0824 | 0617-0749 | 0646-0701 | 0716-0614 | 0650-0440 | 0717-0438  20

 21  0549-0823 | 0618-0748 | 0647-0659 | 0717-0612 | 0651-0439 | 0717-0439  21
 22  0550-0822 | 0619-0746 | 0648-0657 | 0718-0611 | 0653-0439 | 0718-0439  22
 23  0551-0821 | 0619-0745 | 0648-0656 | 0719-0610 | 0654-0438 | 0718-0440  23
 24  0552-0820 | 0620-0744 | 0649-0654 | 0720-0608 | 0655-0438 | 0719-0440  24

 25  0553-0820 | 0621-0742 | 0650-0652 | 0721-0607 | 0656-0437 | 0719-0441  25
 26  0554-0819 | 0622-0741 | 0651-0651 | 0722-0606 | 0657-0437 | 0719-0442  26
 27  0554-0818 | 0623-0739 | 0652-0649 | 0723-0604 | 0658-0437 | 0720-0442  27
 28  0555-0817 | 0624-0738 | 0653-0648 | 0724-0603 | 0659-0436 | 0720-0443  28

 29  0556-0816 | 0625-0736 | 0654-0646 | 0725-0602 | 0700-0436 | 0720-0444  29
 30  0557-0815 | 0626-0734 | 0655-0644 | 0727-0559 | 0701-0436 | 0720-0445  30
 31  0558-0814 | 0627-0733 |                      | 0728-0558 |                      | 0720-0445  31

 

 Snowfall

October 2008 to April 2009

City

Oct

Nov

Dec

Jan Feb Mar Apr

Seasonal Totals

Aurora (Central)

 0.0              0.0
Brighton  0.0              0.0
Broomfield  0.0              0.0

Castle Rock 4 NE

 0.3              0.3

Colorado Sprgs Airport

 TR              TR
Denver DIA  TR              TR

Denver Downtown

 0.0              0.0

Golden

TR              TR

Fort Collins

TR              TR

Highlands Ranch

 0.0              0.0

Lakewood

 0.0              0.0

Littleton

 0.0              0.0

Parker

TR              TR

Sedalia - Hwy 67

 TR              TR

Thornton

 0.0              0.0

Westminster

 0.0              0.0

Wheatridge

 0.0              0.0