The Weather Wire

 

December 2008                                                                                                            Volume 16 Number 12

 

Contents

 

 

 
·   Skyview Overview
 

·   Drought Monitor

 

·   November

    Summary

 

·   November Stats

 

·   December Preview

 

·   Sunrise/Sunset

 

·   Snow Totals

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November 

Avg High - 57.3

Avg Low - 28.8

Snow - 1.7"

Season Snow - 1.7"

Precipitation - 0.18"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

December

Avg High - 44.1

Avg Low - 16.4

Avg Snow -  8.7"

Avg Precip - 0.63"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

Skyview Weather Overview

Now that snow is beginning to fly along the Front Range it is a good time to review Skyview Weather’s winter operations.

Forecasts:  Forecasts are issued Monday through Saturday, generally between 700am and 800am.  Sunday forecasts are issued only if precipitation is expected on Sunday or during the day Monday.  Forecasts are typically delivered by e-mail with an abbreviated version sent to pagers/alphanumeric devices (such as blackberries and cell phones) shortly after 800am.  Fax updates are still available though are discouraged, as they are the slowest method of dissemination.  Additionally, forecasts can be accessed on the web at www.anythingweather.com  (click the client login, top right) by using your username and password.

Complete Forecast Updates:  Updates can be issued at any time if the morning forecast is not  on track, however, these updates are usually issued between 300pm and 400pm, in hopes of reaching our clients before leaving the office.  These updates are reserved for snow amount modifications or storm timing and are distributed the same way as the morning forecasts, via email, pagers/alphanumeric devices, fax, and updated to the web.  Updates are typically not issued for non-precipitation changes such as cloud cover or temperature changes.

Minor Forecast Updates: Many times Skyview Weather will issue a brief update via email and pagers/alphanumeric devices but NOT the complete forecast document.  These updates may include simple "morning forecast on track", "snowfall coming to an end", or warning information that may be issued by NWS.  This information is brief, and ideally suited for pager/alphanumeric devices (Skyview encourages clients to take advantage of this service, call or email for details).  These updates are NOT faxed or put on the web.

Evening Verbal Update Calls:  When snow is anticipated during the overnight period, Skyview Weather will call our winter clients to provide verbal information on the timing and amount of snow anticipated.  Please note that if snowfall amounts are expected to be less than 1-2", these calls may not be made.  Typically, these outgoing calls are made between 4pm and 7pm.  It is also important to note that Skyview Weather will NOT make outgoing calls if no snow is anticipated through daybreak the next day.

Snow Reports:  Snow reports are issued after every measurable snow event, with a 2 business day delivery standard, after the snow has ended.  The snow totals on the snow reports are taken from various sources including NWS reports, local storm reports using local trained spotters or from Skyview’s own spotter network.  These snow totals are measured from a snowboard and reflect average “grass” amounts, these totals to not include drifting snowfall or actual snow on pavement/concrete.  

Personal Attention:  As a client of Skyview, an important part of Skyview Weather's service to you is that you can call for an update by calling the office line at 303-688-9175.  Preferred times for calling are 7am until 9pm, but we attempt to be available during later hours during snow events to answer any questions you may have at a critical time.  Please note, that we are often very busy before and during the snow event, so as a result you may have to leave a brief message.  Leaving a message with your name and number at off hours is especially important as it will trigger a page to our personal pagers alerting us of your message and allowing us to get back to you.  Please note, if you try our cell phones, it’s best not to leave a message on the cell phone as these messages are not checked frequently, and do not trigger our pagers.  As long as it is weather related we are here for you!  

Drought Update

Areas of drought are spreading across much of eastern Colorado as a result of our precipitation deficit year to date. 

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

The map below shows forecasted precipitation deviances for December 2008.  Normal precipitation is anticipated for south and southwestern Colorado, with above normal precipitation northeastern Colorado.

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

November Summary

We almost broke a record for the latest first snowfall of the season this November.  The first snow was officially the 14th with a measly 0.1" with the latest snowfall on record occurring on the 24th in 1934.  If this 0.1" were not measured we would have easily broken the record since the next measurable snow was on the 29th.  Monthly snow was only 1.7" which is 9.0" below normal.  The snow deficit is mounting quickly as we are now 15.2" below normal snowfall so far this winter season.  This November was very warm with an average high of 57.3 degrees which is 5.8 degrees above normal.  The average low was 28.8 degrees, 5.3 degrees above average.  I cannot remember a month this far above normal in temperature in quite some time.  This month just missed out on the 10th warmest November on record by 0.8 of a degree.  With the lack of precipitation there was 79% of possible sunshine with only 64% on average.  The lack of snow and cold last month will likely lead to a cold and snowy December.

November Stats

TEMPERATURE (IN DEGREES F)

 

 

 

 

 

 

AVERAGE MAX

57.3

NORMAL

51.5

DEPARTURE

5.8

AVERAGE MIN

28.8

NORMAL

23.5

DEPARTURE

5.3

MONTHLY MEAN

43.1

NORMAL

37.5

DEPARTURE

5.5

HIGHEST

78 on the 2nd and 18th

LOWEST

12 on the 15th

 

 

 

 

 

 

DAYS WITH MAX 90 OR ABOVE

0

NORMAL

0.0

DAYS WITH MAX 32 OR BELOW

0

NORMAL

2.5

DAYS WITH MIN 32 OR BELOW

22

NORMAL

24.4

DAYS WITH MIN ZERO OR BELOW

0

NORMAL

0.3

 

 

 

 

 

 

TEMPERATURE RECORDS

 

New record high of 78 on the 18th

 

 

 

 

 

 

 

HEATING DEGREE DAYS

 

 

 

 

 

 

MONTHLY TOTAL

651

NORMAL

826

DEPARTURE

-175

SEASONAL TOTAL

1188

NORMAL

1408

DEPARTURE

-220

 

 

 

 

 

 

COOLING DEGREE DAYS

 

 

 

 

 

 

MONTHLY TOTAL

0

NORMAL

0

DEPARTURE

0

YEARLY TOTAL

825

NORMAL

696

DEPARTURE

129

 

 

 

 

 

 

PRECIPITATION (IN INCHES)

 

 

 

 

 

 

MONTHLY TOTAL

0.18

NORMAL

0.98

DEPARTURE

-0.80

YEARLY TOTAL

9.97

NORMAL

14.66

DEPARTURE

-4.69

GREATEST IN 24 HOURS

0.09" on the 28th

DAYS WITH MEASURABLE PRECIPITATION

4

 

 

 

 

 

SNOWFALL (IN INCHES)

 

 

 

 

 

 

MONTHLY TOTAL

1.7

NORMAL

10.7

DEPARTURE

-9.0

SEASONAL TOTAL

1.7

NORMAL

16.9

DEPARTURE

-15.2

GREATEST IN 24 HOURS

N/A

GREATEST DEPTH

N/A

 

 

 

 

 

 

WIND (IN MILES PER HOUR)

 

 

 

 

 

 

AVERAGE SPEED 10.1mph

PEAK WIND GUST

51mph from the WNW

 

 

 

 

 

 

MISCELLANEOUS WEATHER

 

 

 

 

 

 

NUMBER OF DAYS WITH THUNDERSTORMS

0

NORMAL

<1

NUMBER OF DAYS WITH HEAVY FOG

3

NORMAL

1

NUMBER OF DAYS WITH HAIL

0

 

 

PERCENT OF SUNSHINE

79%

NORMAL

64%

 

 

 

December Preview

The official start to winter will begin on December 21st at 6:04am MST.  So far this month the weather pattern has become much more active and this is expected to continue with storm systems tracking through the state every 3 or 4 days bringing the chance for snow.  This December will likely be above normal in snowfall and precipitation which will help cut into the 15" snow deficit we are already facing.  With the active weather pattern temperatures will likely be at or slightly below normal for the month.  The shortest days of the year are in December and with the low sun angle it becomes more difficult to melt fresh snow which will hopefully lend itself to a white Christmas!             

DENVER'S NOVEMBER CLIMATOLOGICALLY NORMAL

(NORMAL PERIOD 1971-2000)

 

 

TEMPERATURE

 

 

 

AVERAGE HIGH

44.1

AVERAGE LOW

16.4

MONTHLY MEAN

30.3

DAYS WITH HIGH 90 OR ABOVE

0

DAYS WITH HIGH 32 OR BELOW

5

DAYS WITH LOW 32 OR BELOW

29

DAYS WITH LOWS ZERO OR BELOW

3

 

 

PRECIPITATION

 

 

 

MONTHLY MEAN

0.63"

DAYS WITH MEASURABLE PRECIPITATION

5

AVERAGE SNOWFALL IN INCHES

8.7"

DAYS WITH 1.0 INCH OF SNOW OR MORE

3

 

 

MISCELLANEOUS AVERAGES

 

 

 

HEATING DEGREE DAYS

1078

COOLING DEGREE DAYS

0

WIND SPEED (MPH)

8.4mph

WIND DIRECTION

South

DAYS WITH THUNDERSTORMS

0

DAYS WITH DENSE FOG

1

PERCENT OF SUNSHINE POSSIBLE

67%

 

 

EXTREMES

 

 

 

RECORD HIGH

79 on 12/5/1939

RECORD LOW

-25 on 12/22/1009, 12/24/1876

WARMEST

43.8 in 1933

COLDEST

17.5 in 1983

WETTEST

5.21" in 1913

DRIEST

0.00" in 1881

SNOWIEST

57.4" in 1913

LEAST SNOWIEST

0.0" in 1881
 

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 7.6            7.6
Brighton  0.0 1.6            1.6
Broomfield  0.0 2.3            2.3

Castle Rock 4 NE

 0.3 12.0            12.3

Colorado Sprgs Airport

 TR 2.6            2.6
Denver DIA  TR 1.7            1.7

Denver Downtown

 0.0 3.0            3.0

Golden

TR 9.3           9.3

Fort Collins

TR TR            TR

Highlands Ranch

 0.0 13.9            13.9

Lakewood

 0.0 3.8            3.8

Littleton

 0.0 15.2            15.2

Parker

TR 9.3            9.3

Sedalia - Hwy 67

 TR 14.2            14.2

Thornton

 0.0 3.4            3.4

Westminster

 0.0 2.3            2.3

Wheatridge

 0.0 5.3            5.3