The Weather Wire

 

June 2010                                                                                                            Volume 17 Number 06

 

Contents

 

 

 
·   Denver Precipitation
 

·   Drought Monitor

 

·   May

    Summary

 

·   May Stats

 

·   June Preview

 

·   Sunrise/Sunset

 

·   Snowfall Totals

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May

Avg High - 68.3

Avg Low - 39.7

Snow - 1.3"

Season Snow - 60.6"

Precipitation - 1.52"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

June

Avg High - 82.1

Avg Low - 53.0

Avg Snow -  Trace

Avg Precip - 1.56"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

In 2009 Denver received 18.12” of precipitation which was the highest total since 1999.  Most of Denver’s precipitation falls in the spring and summer months with the snowier winter months actually providing only a small portion of the annual precipitation.  With 15.81” of precipitation on an average year the months of May, June, July and August typically dictate if a year will end up above or below normal in precipitation.  Since we are already below average this year it is becoming highly likely that this year will be below normal in precipitation.  Below is a list of the top 5 wettest months in Denver history and a table showing the last 10 years of precipitation for Denver to put some of these totals into perspective.

 

The highest monthly total in Denver history was recorded May of 1876 with 8.57” of total precipitation.  That is more precipitation than Denver received for the entire year in 2002.  April of 1900 comes in number two on the list with 8.24” of precipitation.  If you notice the totals begin to decrease in June indicating that making up for below normal precipitation becomes tougher and tougher as the year progresses.  As of June 1st 5.20” of precipitation has been measured at DIA with 6.53” normally resulting in a 1.33” deficit.  With the bout of cold and wet weather earlier this month there has been 1.59” of precipitation so far this month which is already above normal for June but we will need some additional rainfall to cut into the deficit.  Unfortunately later June into July can be a drier period as we wait for the monsoon season to kick in for the Front Range and if that holds true there may not much additional precipitation this month.   

 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 June 2010. As can be seen, normal temperatures are expected for northeast Colorado with above average temperatures remainder of the state. 

The map below shows forecasted precipitation deviances for June 2010.  Normal precipitation is expected for most of the state, though far eastern Colorado is expected to above above normal precipitation.

Little in the way of drought remains in Colorado.

May Summary

May of 2010 started out very cold but towards the end of the month warmer weather took hold and resulted in monthly temperatures being modestly colder than normal.  Average highs were 68.3 compared to 70.5 and average lows were 39.7 compared to 43.8.  This resulted in a monthly mean temperature of 54 degrees, right around 4 degrees below normal.  If it were not for the last warm week of May this month would have gone down as one of the coldest months of May on record.  Most of May's precipitation came in the first half of the month with much drier weather towards the end resulting in a monthly precipitation deficit of 0.80.  Currently for the year Denver(DIA) is now 1.33" below normal.  There was measurable snowfall reported  in May of 1.3" which is exactly normal for May and the first May in recent years with measurable snowfall.

May Stats

TEMPERATURE (IN DEGREES F)

 

 

 

 

 

 

AVERAGE MAX

68.3

NORMAL

70.5

DEPARTURE

-2.2

AVERAGE MIN

39.7

NORMAL

43.8

DEPARTURE

-4.1

MONTHLY MEAN

54.0

NORMAL

57.2

DEPARTURE

-3.2

HIGHEST

90 on the 28th

LOWEST

28 on the 8th

 

 

 

 

 

 

DAYS WITH MAX 90 OR ABOVE

1

NORMAL

0.4

DAYS WITH MAX 32 OR BELOW

0

NORMAL

0

DAYS WITH MIN 32 OR BELOW

7

NORMAL

1.5

DAYS WITH MIN ZERO OR BELOW

0

NORMAL

0

 

 

 

 

 

 

TEMPERATURE RECORDS

 

No new temperature records tied or broken

 

 

 

 

 

 

 

HEATING DEGREE DAYS

 

 

 

 

 

 

MONTHLY TOTAL

350

NORMAL

267

DEPARTURE

83

SEASONAL TOTAL

6403

NORMAL

6068

DEPARTURE

355

 

 

 

 

 

 

COOLING DEGREE DAYS

 

 

 

 

 

 

MONTHLY TOTAL

16

23

2

DEPARTURE

-7

YEARLY TOTAL

16

NORMAL

25

DEPARTURE

-9

 

 

 

 

 

 

PRECIPITATION (IN INCHES)

 

 

 

 

 

 

MONTHLY TOTAL

1.52

NORMAL

2.32

DEPARTURE

-0.80

YEARLY TOTAL

4.20

NORMAL

6.53

DEPARTURE

-1.33

GREATEST IN 24 HOURS

1.02" in the 11-12th

DAYS WITH MEASURABLE PRECIPITATION

8

 

 

 

 

 

SNOWFALL (IN INCHES)

 

 

 

 

 

 

MONTHLY TOTAL

1.3

NORMAL

1.3

DEPARTURE

0.0

SEASONAL TOTAL

60.6

NORMAL

62.3

DEPARTURE

-1.7

GREATEST IN 24 HOURS

1.3" on the 11-12th

GREATEST DEPTH

NA

 

 

 

 

 

 

WIND (IN MILES PER HOUR)

 

 

 

 

 

 

AVERAGE SPEED

11.8 mph

PEAK WIND GUST

64 mph from the Southwest

 

 

 

 

 

 

MISCELLANEOUS WEATHER

 

 

 

 

 

 

NUMBER OF DAYS WITH THUNDERSTORMS

5

NORMAL

6

NUMBER OF DAYS WITH HEAVY FOG

4

NORMAL

1

NUMBER OF DAYS WITH HAIL

1

 

 

PERCENT OF SUNSHINE

NA

NORMAL

64%

June Preview

June is Denver's severe weather month with the highest frequency of strong and severe thunderstorms capable of producing large hail and tornadoes.  Up to the second week of June this has held true as there have been numerous large hail storms all over the state producing damage to agriculture, homes and automobiles.  Tornado watches and warnings have been issued up and down the Front Range with the greatest activity over the eastern plains.  June of 2009 was the second wettest June on record and that will not happen this year as near normal to slightly below normal precipitation is expected.  There are on average 10 thunderstorm days during the month and we are well on our way to that total.  Towards the end of June temperatures can easily reach 100 degrees with a record high for the month of 104 degrees. 

DENVER'S NOVEMBER CLIMATOLOGICALLY NORMAL

(NORMAL PERIOD 1971-2000)

 

 

TEMPERATURE

 

 

 

AVERAGE HIGH

82.1

AVERAGE LOW

53.0

MONTHLY MEAN

67.6

DAYS WITH HIGH 90 OR ABOVE

6

DAYS WITH HIGH 32 OR BELOW

0

DAYS WITH LOW 32 OR BELOW

0

DAYS WITH LOWS ZERO OR BELOW

0

 

 

PRECIPITATION

 

 

 

MONTHLY MEAN

1.56"

DAYS WITH MEASURABLE PRECIPITATION

9

AVERAGE SNOWFALL IN INCHES

Trace

DAYS WITH 1.0 INCH OF SNOW OR MORE

0

 

 

MISCELLANEOUS AVERAGES

 

 

 

HEATING DEGREE DAYS

60

COOLING DEGREE DAYS

136

WIND SPEED (MPH)

8.9 mph

WIND DIRECTION

South

DAYS WITH THUNDERSTORMS

10

DAYS WITH DENSE FOG

<1

PERCENT OF SUNSHINE POSSIBLE

70%

 

 

EXTREMES

 

 

 

RECORD HIGH

104 on June 26, 1994

RECORD LOW

30 on June 2, 1951

WARMEST

73.5 in 1994

COLDEST

60.6 in 1967

WETTEST

4.96" in 1882

DRIEST

Trace in 1890

SNOWIEST

0.4" in 1919

LEAST SNOWIEST

0.0"
 

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- May

Seasonal Totals

Aurora (Central)

20.2 9.3 13.8 1.8 12.4 15.9 3.8 77.2
Brighton 18.4 8.3 12.4 3.1 7.8 15.1 2.1 67.2
Broomfield 27.2 11.8 17.3 2.6 15.0 20.1 4.6 98.6

Castle Rock 4 NE

27.5 8.7 12.5 0.8 12.0 18.7 26.8 107.0

Colorado Sprgs Airport

1.8 1.5 9.4 1.9 9.7 7.2 0.3 31.8
Denver DIA 17.2 9.3 11.1 2.6 5.8 12.8 1.8 60.6

Denver Downtown

21.4 9.0 16.1 2.8 14.2 17.9 5.8 87.2

Golden

28.3 12.9 21.7 5.7 19.9 32.2 11.2 131.9

Fort Collins

25.5 6.6 19.5 3.3 12.4 12.5 7.4 87.2

Highlands Ranch

34.4 9.7 15.4 1.6 12.8 25.2 14.7 113.8

Lakewood

20.5 9.0 12.4 3.1 15.7 16.3 5.5 82.5

Littleton

25.9 12.2 16.0 2.3 15.9 19.5 6.2 98.0

Parker

22.5 8.2 12.8 1.0 8.7 19.5 15.0 87.7

Sedalia - Hwy 67

30.0 10.0 10.5 1.3 13.7 25.0 20.0 110.5

Thornton

22.8 8.3 16.6 1.5 11.2 17.1 5.5 82.4

Westminster

21.6 13.0 15.2 2.1 16.5 18.6 5.8 92.8

Wheatridge

28.8 10.9 15.6 3.4 19.3 17.3 6.5 101.8