The Weather Wire

 

February 2008                                                                                                            Volume 16 Number 02

 

Contents

 

 

 
·   2007 Year in Review
 

·   Drought Monitor

 

·   January

    Summary

 

·   January Stats

 

·   February Preview

 

·   Sunrise/Sunset

 

·   Snow Totals

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

January 

Avg High 40.1

Avg Low 15.7

Snow - 3.1"

Season Snow - 29.5"

Precipitation - 0.08"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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) 660-0548

 

E-mail:    

tim@skyview-wx.com

 

We’re on the Web!

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

 

Copyright 2008

Skyview Weather

2007 Year in Review

The year of 2007 began very snowy as the record for consecutive days with measurable snow on the ground was in jeopardy, ending up just a couple days short of breaking the record.  After the unusually snowy January the month of February was at or just below normal for many areas.  March was rather tranquil and April had a heavy wet snow for higher elevations of the foothills and Palmer Divide, but lower elevations experienced only a cold rain mixing with snow at times.  There was not any snowfall reported at lower elevations in May, but another heavy wet snow occurred over the Palmer Divide with just light amounts in the western foothills.  The snow totals for the 2006-2007 winter season were close to double the normal for many locations.  The summer months became active with thunderstorm activity from the 4th of July through September.  The weather pattern dried out during the fall with below average snowfall for September, October and November.  Then in December the pattern changed to a very active period resulting in above normal snowfall for the month of December, and this active weather pattern has stayed with us into this year.

The highest temperature in 2007 for the Denver area, reported at DIA was 100 degrees on the 24th of June, as well as 2nd and 17th of July.  The lowest temperature was -18 on the 2nd of February.  The average high for the year was 64.3 which was 0.1 degree above average, while the average low for the year was 37.0 which was 1.2 degrees above average.  54 days had highs greater than or equal to 90 which was 20 days above average.  41 days had highs less than or equal to 32 degrees which was 19 days more than normal, most likely due to the continuous snow on the ground early in the year.  139 days had lows at or below freezing which was 17 days less than normal and only 8 days with lows below zero which right at the average.  The last freeze of the year was June 8th while the first freeze of fall was the 8th of October.

Precipitation for the year was slightly below normal at DIA with 14.00” compared to the 15.81” average.  This amount does not necessarily represent the Front Range as a whole as many locations were at or above normal in yearly precipitation.  The greatest 24 hour precipitation total was 2.65” due to a thunderstorm that moved over the DIA area on the 13th of October.  Other areas within the city did not receive nearly as much as the airport reported and this data is somewhat in question as a lightning strike may have corrupted the data.  The heaviest 24 hour snowfall was 7.8” on Christmas day, and the most snowfall depth measured on the ground was 14” on the 6th and 22nd of January.  Many areas of the Front Range had much higher amounts of snow on the ground as storm after storm continued to pile up early in the year.

Overall, the year of 2007 was not in the top ten in any category: warmest, driest, coldest, wettest, or snowiest.  Remember, this data only represents a single point at DIA while snow is still measured at the old Stapleton site.  With the variable terrain of the Rocky Mountains to the west, the Palmer Divide to the south and the low lying areas along the Platte River there are many microclimates that make the Front Range of Colorado unique.  Your location is likely a quite a bit different pending elevation and location, which is why the weather in this part of Colorado is difficult to predict at times, but one thing is for sure, normal only exists on paper with the reality typically being one side or the other nearly every day.     

Drought Update

Little in the way of meaningful drought across Colorado as of early February, through some dry areas do persist across Eastern Colorado.

The map below shows forecasted temperature deviances for February 2008. As can be seen, much of Colorado is expected to have above normal temperatures for February 2008.

The map below shows forecasted precipitation deviances for February 2008.  Normal precipitation is anticipated across the Western half of the state, with below normal precipitations across the Eastern plains for February 2008.

Little change in conditions is anticipated over the next 3 months, with most of the state not expected to see drought conditions.

January Summary

January of 2008 was the 7th driest on record, but many other areas to the south and west faired much better with precipitation than did the official measuring site.  Once again, the inconsistent location of the official measuring site makes comparison to earlier years and climatological averages difficult. Total for the month only 0.08" of liquid equivalent was measured and a mere 3.1" while other areas within the city received between 4-11".  Snowfall for the season is now below average with 29.5" so far this winter season.  There were not any temperature records broken in January and the average high was 3 degrees below normal.  The average min was right near normal and the monthly mean was 1.3 degrees below normal.  That makes two months in a row with below normal temperatures.  Temperatures ranged from 63 degrees to -3 degrees for a spread of 66 degrees.  The peak wind gust for the month was 46mph from the west on the 28th. 

January Stats

TEMPERATURE (IN DEGREES F)

 

 

 

 

 

 

AVERAGE MAX

40.1

NORMAL

43.2

DEPARTURE

-3.1

AVERAGE MIN

15.7

NORMAL

15.2

DEPARTURE

0.5

MONTHLY MEAN

27.9

NORMAL

29.2

DEPARTURE

-1.3

HIGHEST

63 on the 27th

LOWEST

-3 on the 22nd

 

 

 

 

 

 

DAYS WITH MAX 90 OR ABOVE

0

NORMAL

0

DAYS WITH MAX 32 OR BELOW

6

NORMAL

6.5

DAYS WITH MIN 32 OR BELOW

29

NORMAL

29.8

DAYS WITH MIN ZERO OR BELOW

4

NORMAL

3.8

 

 

 

 

 

 

TEMPERATURE RECORDS

 

There were no temperature records broken.

 

 

 

 

 

 

 

HEATING DEGREE DAYS

 

 

 

 

 

 

MONTHLY TOTAL

1143

NORMAL

1111

DEPARTURE

32

SEASONAL TOTAL

3455

NORMAL

3597

DEPARTURE

-142

 

 

 

 

 

 

COOLING DEGREE DAYS

 

 

 

 

 

 

MONTHLY TOTAL

0

NORMAL

0

DEPARTURE

0

YEARLY TOTAL

0

NORMAL

0

DEPARTURE

0

 

 

 

 

 

 

PRECIPITATION (IN INCHES)

 

 

 

 

 

 

MONTHLY TOTAL

0.08"

NORMAL

0.51"

DEPARTURE

-0.43"

YEARLY TOTAL

0.08"

NORMAL

0.51"

DEPARTURE

-0.43"

GREATEST IN 24 HOURS

0.07"

DAYS WITH MEASURABLE PRECIPITATION

2

 

 

 

 

 

SNOWFALL (IN INCHES)

 

 

 

 

 

 

MONTHLY TOTAL

3.1"

NORMAL

7.7"

DEPARTURE

-4.6"

SEASONAL TOTAL

29.5"

NORMAL

31.3"

DEPARTURE

-1.8"

GREATEST IN 24 HOURS

1.2" on the 31st

GREATEST DEPTH

5.0" on the 1st

 

 

 

 

 

 

WIND (IN MILES PER HOUR)

 

 

 

 

 

 

AVERAGE SPEED 9.9mph

PEAK WIND GUST

46mph from the west

 

 

 

 

 

 

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

79%

NORMAL

71%

 

 

 

February Preview

February is the driest month of the year and the 6th snowiest with only 0.49" of liquid equivalent and 6.3" of snowfall.  Typically February is a rather tranquil month joining October and September as some of the quietest weather months of the year.  It is a transition month from the cold of winter to the warmth of spring with the possibility of cold air outbreaks with temperatures falling well below zero and spring like weather at times.  The temperature extremes range from 77 degrees to -25 degrees for a spread of 102 degrees.  Some big snow storms have occurred over the years with the largest being 14.2" between the 23rd and 25th of 1912.     

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)

8.8 mph

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

0.3" in 1970 and 1992
 

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  0720-0445 | 0708-0517 | 0632-0551 | 0643-0723 | 0600-0753 | 0533-0821  01
02  0721-0446 | 0707-0519 | 0630-0552 | 0641-0724 | 0558-0754 | 0533-0822  02
03  0721-0447 | 0706-0520 | 0629-0553 | 0640-0725 | 0557-0755 | 0533-0823  03
04  0721-0448 | 0705-0521 | 0627-0554 | 0638-0726 | 0556-0756 | 0532-0823  04

05  0721-0449 | 0704-0522 | 0626-0555 | 0637-0727 | 0555-0757 | 0532-0824  05
06  0721-0450 | 0703-0523 | 0624-0556 | 0635-0728 | 0554-0758 | 0532-0825  06
07  0721-0451 | 0702-0525 | 0623-0557 | 0633-0729 | 0553-0759 | 0532-0825  07
08  0721-0452 | 0701-0526 | 0621-0558 | 0632-0730 | 0551-0800 | 0531-0826  08

09  0720-0453 | 0700-0527 | 0720-0700 | 0630-0731 | 0550-0801 | 0531-0826  09
10  0720-0454 | 0658-0528 | 0718-0701 | 0629-0732 | 0549-0802 | 0531-0827  10
11  0720-0455 | 0657-0529 | 0716-0702 | 0627-0733 | 0548-0803 | 0531-0827  11
12  0720-0456 | 0656-0530 | 0715-0703 | 0626-0734 | 0547-0804 | 0531-0828  12

13  0720-0457 | 0655-0532 | 0713-0704 | 0624-0735 | 0546-0805 | 0531-0828  13
14  0719-0458 | 0654-0533 | 0712-0705 | 0623-0736 | 0545-0806 | 0531-0829  14
15  0719-0459 | 0652-0534 | 0710-0706 | 0621-0737 | 0545-0807 | 0531-0829  15
16  0718-0500 | 0651-0535 | 0708-0707 | 0620-0738 | 0544-0808 | 0531-0829  16

17  0718-0500 | 0650-0536 | 0707-0708 | 0618-0739 | 0543-0809 | 0531-0830  17
18  0718-0501 | 0649-0537 | 0705-0709 | 0617-0740 | 0542-0810 | 0531-0830  18
19  0717-0502 | 0647-0539 | 0704-0710 | 0615-0741 | 0541-0811 | 0531-0830  19
20  0717-0503 | 0646-0540 | 0702-0711 | 0614-0742 | 0540-0812 | 0532-0831  20

21  0716-0505 | 0645-0541 | 0700-0712 | 0613-0743 | 0540-0812 | 0532-0831  21
22  0715-0506 | 0643-0542 | 0659-0713 | 0611-0744 | 0539-0813 | 0532-0831  22
23  0715-0507 | 0642-0543 | 0657-0714 | 0610-0745 | 0538-0814 | 0532-0831  23
24  0714-0508 | 0640-0544 | 0656-0715 | 0609-0746 | 0538-0815 | 0533-0831  24

25  0713-0509 | 0639-0545 | 0654-0716 | 0607-0747 | 0537-0816 | 0533-0831  25
26  0713-0510 | 0638-0547 | 0652-0717 | 0606-0748 | 0536-0817 | 0533-0831  26
27  0712-0511 | 0636-0548 | 0651-0718 | 0605-0749 | 0536-0817 | 0534-0832  27
28  0711-0513 | 0635-0549 | 0649-0719 | 0603-0750 | 0535-0818 | 0534-0832  28

29  0710-0514 | 0633-0550 | 0648-0720 | 0602-0751 | 0535-0819 | 0535-0832  29
30  0709-0515 |                      | 0646-0721 | 0601-0752 | 0534-0820 | 0535-0831  30
31  0709-0516

 Snowfall

October 2007 to March 2008

City

Oct

Nov

Dec

Jan Feb Mar

Seasonal Totals

Aurora (Central)

4.5" 2.3" 23.8" 4.6"     35.2"
Brighton 2.2" 2.8" 19.5" 1.2"     25.7"
Broomfield 2.5" 2.7" 23.1" 5.1"     33.4"

Castle Rock 4 NE

7.0" 2.5" 24.7" 11.2"     45.4"

Colorado Sprgs Airport

0.0" 1.2" 7.2" 8.0"     16.4"
Denver DIA 3.0" 2.5" 20.9" 3.1"     29.5"

Denver Downtown

2.2" 2.6" 22.9" 6.9"     34.6"

Golden

1.8" 3.6" 27.7" 6.4"     39.5"

Highlands Ranch

6.0" 2.7" 28.5" 10.9"     48.4"

Lakewood

2.5" 2.0" 22.0" 5.8"     32.3"

Littleton

4.0" 3.0" 26.0" 5.8"     38.8"

Parker

4.5" 2.3" 23.3" 6.6"     36.7"

Sedalia - Hwy 67

4.0" 4.0" 23.7" 14.0"     45.7"

Thornton

2.5" 2.0" 19.5" 3.4"     27.4"

Westminster

1.8" 2.5" 22.1" 8.7"     35.1"

Wheatridge

2.9" 2.9" 25.2" 8.6"     39.6"