The Weather Wire

 

April 2008                                                                                                            Volume 16 Number 04

 

Contents

 

 

 
·   Winter Season
 

·   Drought Monitor

 

·   March

    Summary

 

·   March Stats

 

·   April Preview

 

·   Sunrise/Sunset

 

·   Snow Totals

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March 

Avg High 53.2

Avg Low 25.9

Snow - 5.4"

Season Snow - 40.0"

Precipitation - 0.17"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

April

Avg High 60.9

Avg Low 34.2

Avg Snow -  9.1"

Avg Precip - 1.93"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

A look at this Winter Season

Snowfall amounts this winter season have been highly variable along the Front Range of Colorado from Colorado Springs to Fort Collins.  From the Palmer Divide northward snowfall has been around average in the southern and western suburbs of Denver extending into the foothills to the west.  The official measuring site at old Stapleton airport in Denver has reported snowfall amounts well below average since the new year leaving a deficit of  nearly a foot of snow.  April is the 3rd snowiest month in Denver and the snow season could be salvaged if not by snow, but a couple good soaking rain storms.  The likelihood of catching up in the snow department is low, but being nearly 2 inches below normal in total precipitation may be tough to make up as 2 inches is nearly 8% of our total yearly precipitation of 15.81". 

There has been no shortage of active weather this winter though as the frequency of storm systems has been very high with around 40 different occasions with measurable snow somewhere along the Front Range.  Since December around 9-11 snow events each month have kept snow plow companies on their toes.  This high frequency of storms have deposited well above average snowfall to western and especially southwestern parts of the state, but here the high frequency has not resulted in the above normal snowfall.  Many cases an inch or less has occurred with low water content.  Such is the case with eastern areas of the Denver Metro area, south of the Palmer Divide into the city of Colorado Springs snowfall has been lower than normal.  The airport in Colorado Springs has only reported about 30" of snow so far this season and a little over 40" is normal. 

As far as temperatures go there has been no sign of global warming here as most of the winter months have been around normal to slightly below.  Many lakes above 8000' are still covered with feet of snow and ice.  Recently opened Antero Reservoir in near Hartsel has even suffered a winter kill of fish due to the ice and snow blocking sunlight which plants need to grow during the winter which in turn supplies oxygen to the water.  Many areas will begin to thaw out from winter this month making for green grass and trees during the month of May.      

Looking forward our weather pattern will likely result in near average precipitation going forward making it difficult to make up any deficit that we currently have going into April and May.  The good news is that where we get most of out drinking water is from the snow melt during spring runoff in the mountains which should get underway shortly.    

      

Drought Update

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

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

The map below shows forecasted precipitation deviances for April 2008.  Normal precipitation is anticipated across the entire state.

Little change in conditions is anticipated over the next 3 months, with most of the state not expected to see drought conditions.  Extreme southeastern Colorado as well as extreme northeastern Colorado is anticipated to experience drought conditions persisting and possibly intensifying.

March Summary

March of 2008 was below average snowfall and precipitation for yet another month.  March is typically our snowiest month, but this year only 5.4" of snow was reported at the Stapleton site, which is 6.3 inches below the average of 11.7".  Precipitation for the month was a dismal 0.17" well below the average of 1.28" which made this March of 2008 the 3rd driest March in Denver history.  Other parts of the Denver metro area faired better with precipitation and snowfall and was near normal in western suburbs and foothill regions.  Temperatures for the month were right at the season averages with daytime highs being slightly lower and lows slightly higher.  The mean for the month was right at normal with 39.6 degrees. 

March Stats

TEMPERATURE (IN DEGREES F)

 

 

 

 

 

 

AVERAGE MAX

53.2

NORMAL

53.7

DEPARTURE

-0.5

AVERAGE MIN

25.9

NORMAL

25.4

DEPARTURE

0.5

MONTHLY MEAN

39.6

NORMAL

39.6

DEPARTURE

0.0

HIGHEST

74 on the 1st of March

LOWEST

11 on the 23rd

 

 

 

 

 

 

DAYS WITH MAX 90 OR ABOVE

0

NORMAL

0

DAYS WITH MAX 32 OR BELOW

1

NORMAL

2.8

DAYS WITH MIN 32 OR BELOW

28

NORMAL

24.3

DAYS WITH MIN ZERO OR BELOW

0

NORMAL

0.5

 

 

 

 

 

 

TEMPERATURE RECORDS

 

74 degrees on the 1st broke the daily record set back in 1974

 

 

 

 

 

 

 

HEATING DEGREE DAYS

 

 

 

 

 

 

MONTHLY TOTAL

781

NORMAL

788

DEPARTURE

-7

SEASONAL TOTAL

5131

NORMAL

5277

DEPARTURE

-146

 

 

 

 

 

 

COOLING DEGREE DAYS

 

 

 

 

 

 

MONTHLY TOTAL

0

NORMAL

0

DEPARTURE

0

YEARLY TOTAL

0

NORMAL

0

DEPARTURE

0

 

 

 

 

 

 

PRECIPITATION (IN INCHES)

 

 

 

 

 

 

MONTHLY TOTAL

0.17

NORMAL

1.28

DEPARTURE

-1.11

YEARLY TOTAL

0.43

NORMAL

2.31

DEPARTURE

-1.88

GREATEST IN 24 HOURS

0.05"

DAYS WITH MEASURABLE PRECIPITATION

6

 

 

 

 

 

SNOWFALL (IN INCHES)

 

 

 

 

 

 

MONTHLY TOTAL

5.4"

NORMAL

11.7"

DEPARTURE

-6.3"

SEASONAL TOTAL

40.0"

NORMAL

51.3

DEPARTURE

-11.3"

GREATEST IN 24 HOURS

2.0" on the 2nd

GREATEST DEPTH

N/A

 

 

 

 

 

 

WIND (IN MILES PER HOUR)

 

 

 

 

 

 

AVERAGE SPEED 10.4mph

PEAK WIND GUST

49mph from the NNE

 

 

 

 

 

 

MISCELLANEOUS WEATHER

 

 

 

 

 

 

NUMBER OF DAYS WITH THUNDERSTORMS

0

NORMAL

< 1

NUMBER OF DAYS WITH HEAVY FOG

4

NORMAL

1

NUMBER OF DAYS WITH HAIL

0

 

 

PERCENT OF SUNSHINE

72%

NORMAL

69%

 

 

 

April Preview

In April temperatures begin to warm significantly as average highs are just over 60 degrees for the month.  However, winter can still pack a punch as 9.1" of snow is the average for the month making it the 3rd snowiest month for Denver.  The grass begins to turn green with the help of 1.93" of precipitation on average.  We begin to see the the first thunderstorm activity as there area about 2 days during the month with thunder.  Temperatures can range from 90 degrees to below zero, typically the last frost occurs in May so it is still not safe to plant sensitive plants outside just yet.   

DENVER'S NOVEMBER CLIMATOLOGICALLY NORMAL

(NORMAL PERIOD 1971-2000)

 

 

TEMPERATURE

 

 

 

AVERAGE HIGH

60.9

AVERAGE LOW

34.2

MONTHLY MEAN

47.6

DAYS WITH HIGH 90 OR ABOVE

Less than 1

DAYS WITH HIGH 32 OR BELOW

Less than 1

DAYS WITH LOW 32 OR BELOW

11

DAYS WITH LOWS ZERO OR BELOW

Less than 1

 

 

PRECIPITATION

 

 

 

MONTHLY MEAN

1.93"

DAYS WITH MEASURABLE PRECIPITATION

9

AVERAGE SNOWFALL IN INCHES

9.1"

DAYS WITH 1.0 INCH OF SNOW OR MORE

3

 

 

MISCELLANEOUS AVERAGES

 

 

 

HEATING DEGREE DAYS

524

COOLING DEGREE DAYS

2

WIND SPEED (MPH)

10.0mph

WIND DIRECTION

South

DAYS WITH THUNDERSTORMS

2

DAYS WITH DENSE FOG

1

PERCENT OF SUNSHINE POSSIBLE

67%

 

 

EXTREMES

 

 

 

RECORD HIGH

90 on April 30th, 1992

RECORD LOW

-2 on April 2nd, 1975

WARMEST

56.4 degrees in 1946, 1981

COLDEST

38.8 degrees in 1920

WETTEST

8.24" in 1900

DRIEST

0.03" in 1963

SNOWIEST

33.8" in 1933

LEAST SNOWIEST

0.0" in 1888, 1930, 1943, 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" 1.8" 23.8" 4.6" 7.8" 7.1" 49.6"
Brighton 2.2" 2.8" 19.5" 1.2" 5.0" 6.0" 36.7"
Broomfield 2.5" 2.7" 23.1" 5.1" 5.3" 11.3" 50.0"

Castle Rock 4 NE

7.0" 2.5" 24.7" 11.2" 7.8" 5.9" 59.1"

Colorado Sprgs Airport

0.0" 1.2" 7.2" 8.0" 2.7" 11.4" 30.5"
Denver DIA 3.0" 2.5" 20.9" 3.1" 5.1" 5.4" 40.0"

Denver Downtown

2.2" 2.6" 22.9" 6.9" 7.9"   42.5"

Golden

1.8" 3.6" 27.7" 6.4" 11.9" 7.9" 550.4"

Highlands Ranch

6.0" 2.7" 28.5" 10.9" 7.9 15.3" 71.6"

Lakewood

2.5" 2.0" 22.0" 5.8" 4.5" 8.9" 45.7"

Littleton

4.0" 3.0" 26.0" 5.8" 8.5" 13.7" 61.0"

Parker

4.5" 2.3" 23.3" 6.6" 7.6" 7.5" 51.8"

Sedalia - Hwy 67

4.0" 4.0" 23.7" 14.0" 10.0" 8.9" 64.6"

Thornton

2.5" 2.0" 19.5" 3.4" 5.7" 8.8" 41.9"

Westminster

1.8" 2.5" 22.1" 8.7" 6.9" 14.0" 56.0"

Wheatridge

2.9" 2.9" 25.2" 8.6" 8.8" 10.4" 58.8"