The Weather Wire

 

February 2010                                                                                                            Volume 17 Number 02

 

Contents

 

 

 
·   Season Snow Update
 

·   Drought Monitor

 

·   January

    Summary

 

·   January Stats

 

·   February Preview

 

·   Sunrise/Sunset

 

·   Snow Totals

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January

Avg High - 43.0

Avg Low - 17.7

Snow - 2.6"

Season Snow - 40.2"

Precipitation - 0.07"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

February

Avg High - 47.2

Avg Low - 19.1

Avg Snow -  6.3"

Avg Precip - 0.49"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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 2010

Skyview Weather

Season Snow Update

In the previous September of 2009 newsletter we talked about how this was an El Nino winter with above normal snowfall predicted for the Front Range.  So far this winter season has produced above normal snowfall for areas north of the Palmer Divide, but Colorado Springs has suffered a dry winter to this point with below normal snowfall.  It is typical for an El Nino winter to be wet and snowy the early part of the snow season in October and November with a drier period from December through February and then another snowy period again in March and April.  March and April are typically 2 of the top 3 snowiest months of the year anyway, but during El Nino years they can be significantly higher.  This year the two months of March and April are expected to feature above normal precipitation and snowfall with 8-10 snow storms with 2-3 large snow storms of 6-12” and one storm of 12” or more.   If this holds true then snowfall for the 2009-2010 winter season will be well above normal for many locations along the Front Range from the Palmer Divide northward.  Since we are more than half way through the snow season already let’s take a look at where stand as of the first week of February compared to yearly averages:

As can be seen many locations along the Front Range are already close to near normal snowfall for an entire winter season.  With spring still on the horizon and much more snow expected to fall many areas will be well above normal in snowfall this winter, most likely around 20% above normal.  The only locations that are in jeopardy of falling short in the snowfall department are south of the Palmer Divide into Colorado Springs. 

 

 

Drought Update

With the widespread precipitation of the last several months few areas of drought remain over Colorado, though some dry areas have developed in western Colorado.

The map below shows forecasted temperature deviances for February 2010. As can be seen, normal temperatures are expected statewide, with the exception of western Colorado where above normal temperatures are expected.

The map below shows forecasted precipitation deviances for February 2010.  All of Colorado is expected to have normal precipitation for February 2010.

Little in the way of drought remains in Colorado.

January Summary

January of 2010 was a quiet month weather wise as there were only two snow events and 0.07" of precipitation.  Temperatures were slightly below normal for highs and above normal for overnight lows resulting in a monthly mean temperatures of 30.4 which is 1.2 degrees above normal.  Don't be shocked by the lack of precipitation as this is an El Nino year and the mid-winter is typically quite dry with a southern storm track.  Still for the winter season we are above normal in snowfall with 40.2" so far at DIA and much higher amounts in he Denver suburbs.       

January Stats

TEMPERATURE (IN DEGREES F)

 

 

 

 

 

 

AVERAGE MAX

43.0

NORMAL

43.2

DEPARTURE

-0.2

AVERAGE MIN

17.7

NORMAL

15.2

DEPARTURE

2.5

MONTHLY MEAN

30.4

NORMAL

29.2

DEPARTURE

1.2

HIGHEST

58 on the 16th

LOWEST

-16 on the 7th

 

 

 

 

 

 

DAYS WITH MAX 90 OR ABOVE

0

NORMAL

0

DAYS WITH MAX 32 OR BELOW

2

NORMAL

6.5

DAYS WITH MIN 32 OR BELOW

31

NORMAL

29.8

DAYS WITH MIN ZERO OR BELOW

3

NORMAL

3.8

 

 

 

 

 

 

TEMPERATURE RECORDS

 

No new temperature records broken or tied.

 

 

 

 

 

 

 

HEATING DEGREE DAYS

 

 

 

 

 

 

MONTHLY TOTAL

1069

NORMAL

1111

DEPARTURE

-42

SEASONAL TOTAL

3808

NORMAL

3597

DEPARTURE

211

 

 

 

 

 

 

COOLING DEGREE DAYS

 

 

 

 

 

 

MONTHLY TOTAL

0

NORMAL

0

DEPARTURE

0

YEARLY TOTAL

0

NORMAL

0

DEPARTURE

0

 

 

 

 

 

 

PRECIPITATION (IN INCHES)

 

 

 

 

 

 

MONTHLY TOTAL

0.07

NORMAL

0.51

DEPARTURE

-0.44

YEARLY TOTAL

0.07

NORMAL

0.51

DEPARTURE

-0.44

GREATEST IN 24 HOURS

0.05" on the 6th

DAYS WITH MEASURABLE PRECIPITATION

2

 

 

 

 

 

SNOWFALL (IN INCHES)

 

 

 

 

 

 

MONTHLY TOTAL

2.6

NORMAL

7.7

DEPARTURE

-5.1

SEASONAL TOTAL

40.2

NORMAL

35.6

DEPARTURE

4.6

GREATEST IN 24 HOURS

2.3" on the 6th

GREATEST DEPTH

NA

 

 

 

 

 

 

WIND (IN MILES PER HOUR)

 

 

 

 

 

 

AVERAGE SPEED

7.9mph from the SSW

PEAK WIND GUST

35mph from the WNW on the 12th

 

 

 

 

 

 

MISCELLANEOUS WEATHER

 

 

 

 

 

 

NUMBER OF DAYS WITH THUNDERSTORMS

0

NORMAL

0

NUMBER OF DAYS WITH HEAVY FOG

3

NORMAL

1

NUMBER OF DAYS WITH HAIL

0

 

 

PERCENT OF SUNSHINE

NA

NORMAL

71%

February Preview

Well, it cannot be as dry as last February in Denver as 2009 was the driest in Denver history.  This February expect the storm track to become more active towards mid month with near normal snowfall.  Not much snow typically occurs in February as it is one of the driest months of the year with only 6.3" of snow and 0.49" of precipitation on average.  What becomes more noticeable is that there is more sun than January as we gain more daylight each day and temperatures begin to warm slightly.   

DENVER'S NOVEMBER CLIMATOLOGICALLY NORMAL

(NORMAL PERIOD 1971-2000)

 

 

TEMPERATURE

 

 

 

AVERAGE HIGH

47.2

AVERAGE LOW

19.1

MONTHLY MEAN

33.2

DAYS WITH HIGH 90 OR ABOVE

0

DAYS WITH HIGH 32 OR BELOW

4

DAYS WITH LOW 32 OR BELOW

26

DAYS WITH LOWS ZERO OR BELOW

2

 

 

PRECIPITATION

 

 

 

MONTHLY MEAN

0.49"

DAYS WITH MEASURABLE PRECIPITATION

6

AVERAGE SNOWFALL IN INCHES

6.3"

DAYS WITH 1.0 INCH OF SNOW OR MORE

2

 

 

MISCELLANEOUS AVERAGES

 

 

 

HEATING DEGREE DAYS

892

COOLING DEGREE DAYS

0

WIND SPEED (MPH)

8.8mph

WIND DIRECTION

South

DAYS WITH THUNDERSTORMS

Less than 1

DAYS WITH DENSE FOG

NA

PERCENT OF SUNSHINE POSSIBLE

70%

 

 

EXTREMES

 

 

 

RECORD HIGH

77 on 2/28/2006 and 2/4/1890

RECORD LOW

-25 on 2/1/1951 and 2/8/1936

WARMEST

43.7 in 1954

COLDEST

17.6 in 1899

WETTEST

2.01" in 1934

DRIEST

0.01" in 1970

SNOWIEST

22.1" in 1912

LEAST SNOWIEST

Trace in 2009
 

Sunrise/Sunset (Jan - June Denver area)

             JAN              FEB               MAR              APR              MAY              JUN
_______________________________________________________________________________
      sr - ss     sr - ss     sr - ss     sr - ss     sr - ss     sr - ss 
 01  0721-0446 | 0707-0518 | 0632-0550 | 0544-0623 | 0600-0753 | 0534-0821  01
 02  0721-0447 | 0706-0519 | 0631-0551 | 0542-0624 | 0559-0754 | 0533-0822  02
 03  0721-0448 | 0705-0520 | 0629-0553 | 0540-0625 | 0558-0755 | 0533-0822  03
 04  0721-0448 | 0704-0522 | 0628-0554 | 0639-0726 | 0556-0756 | 0533-0823  04
 
 05  0721-0449 | 0703-0523 | 0626-0555 | 0637-0727 | 0555-0757 | 0532-0824  05
 06  0721-0450 | 0702-0524 | 0625-0556 | 0636-0728 | 0554-0758 | 0532-0824  06
 07  0721-0451 | 0701-0525 | 0623-0557 | 0634-0729 | 0553-0759 | 0532-0825  07
 08  0720-0452 | 0700-0526 | 0622-0558 | 0633-0730 | 0552-0800 | 0532-0825  08
 
 09  0720-0453 | 0659-0527 | 0620-0559 | 0631-0731 | 0551-0801 | 0531-0826  09
 10  0720-0454 | 0658-0529 | 0619-0600 | 0630-0732 | 0550-0802 | 0531-0827  10
 11  0720-0455 | 0657-0530 | 0617-0601 | 0628-0733 | 0549-0803 | 0531-0827  11
 12  0720-0456 | 0655-0531 | 0616-0602 | 0626-0734 | 0548-0804 | 0531-0828  12
 
 13  0719-0457 | 0654-0532 | 0614-0603 | 0625-0735 | 0547-0805 | 0531-0828  13
 14  0719-0458 | 0653-0533 | 0612-0604 | 0623-0736 | 0546-0806 | 0531-0828  14
 15  0719-0459 | 0652-0535 | 0611-0605 | 0622-0737 | 0545-0806 | 0531-0829  15
 16  0718-0501 | 0650-0536 | 0609-0606 | 0620-0738 | 0544-0807 | 0531-0829  16
 
 17  0718-0501 | 0649-0537 | 0608-0607 | 0619-0739 | 0543-0808 | 0531-0830  17
 18  0717-0502 | 0648-0538 | 0606-0608 | 0618-0740 | 0542-0809 | 0531-0830  18
 19  0717-0503 | 0647-0539 | 0604-0609 | 0616-0741 | 0542-0810 | 0531-0830  19
 20  0716-0504 | 0645-0540 | 0603-0610 | 0615-0742 | 0541-0811 | 0532-0830  20
 
 21  0716-0505 | 0644-0541 | 0601-0612 | 0613-0743 | 0540-0812 | 0532-0831  21
 22  0715-0506 | 0642-0543 | 0600-0613 | 0612-0744 | 0539-0813 | 0532-0831  22
 23  0714-0507 | 0641-0544 | 0558-0614 | 0611-0745 | 0539-0814 | 0532-0831  23
 24  0714-0509 | 0640-0545 | 0556-0615 | 0609-0746 | 0538-0815 | 0533-0831  24
 
 25  0713-0510 | 0638-0546 | 0555-0616 | 0608-0747 | 0537-0815 | 0533-0831  25
 26  0712-0511 | 0637-0547 | 0553-0617 | 0606-0748 | 0537-0816 | 0533-0831  26
 27  0712-0512 | 0635-0548 | 0552-0618 | 0605-0749 | 0536-0817 | 0534-0832  27
 28  0711-0513 | 0634-0549 | 0550-0619 | 0604-0750 | 0536-0818 | 0534-0832  28
 
 29  0710-0514 |                     | 0548-0620 | 0603-0751 | 0535-0819 | 0534-0832  29
 30  0709-0516 |                     | 0547-0621 | 0601-0752 | 0535-0819 | 0535-0831  30
 31  0708-0517 |                     | 0545-0622 |                      | 0534-0820 |                       31


Snowfall

Sept 2009 to Apr 2010

City

Sept-Oct

Nov

Dec

Jan

Feb

Mar Apr

Seasonal Totals

Aurora (Central)

20.2 9.3 13.8 1.8       45.1
Brighton 18.4 8.3 12.4 3.1       42.2
Broomfield 27.2 11.8 17.3 2.6       58.9

Castle Rock 4 NE

27.5 8.7 12.5 0.8       49.5

Colorado Sprgs Airport

1.8 1.5 9.4 1.9       14.6
Denver DIA 17.2 9.3 11.1 2.6       40.2

Denver Downtown

21.4 9.0 16.1 2.8       49.3

Golden

28.3 12.9 21.7 5.7       68.6

Fort Collins

25.5 6.6 19.5 3.3       54.9

Highlands Ranch

34.4 9.7 15.4 1.6       61.1

Lakewood

20.5 9.0 12.4 3.1       45.0

Littleton

25.9 12.2 16.0 2.3       56.4

Parker

22.5 8.2 12.8 1.0       44.5

Sedalia - Hwy 67

30.0 10.0 10.5 1.3       51.8

Thornton

22.8 8.3 16.6 1.5       49.2

Westminster

21.6 13.0 15.2 2.1       51.9

Wheatridge

28.8 10.9 15.6 3.4       58.7