The Weather Wire

 

August 2008                                                                                                            Volume 16 Number 08

 

Contents

 

 

 
·   August Update
 

·   Drought Monitor

 

·   July

    Summary

 

·   July Stats

 

·   August Preview

 

·   Sunrise/Sunset

 

·   Rainfall Totals

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July 

Avg High - 93.7

Avg Low - 61.5

Snow - 0.0"

Season Snow - 46.3"

Precipitation - 0.24"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

August

Avg High - 86.0

Avg Low - 57.4

Avg Snow -  0.0"

Avg Precip - 1.82"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

August Precipitation Update

The first 10 days of August have been very active with numerous showers and thunderstorms all along the Front Range.  The months leading up to this point have been resulted in a deficit of 5.97" of precipitation up to August 1st in Denver.  The average monthly rainfall for August is 1.82" and many areas have already nearly reached or exceeded this amount.  Lets look back at the summer so far and see where we stand to date:

Easily noticed are the exceptionally dry months of June and July with less than 1.00" reported for the two months combined.  For August we have already exceeded monthly averages and are beginning to cut into the deficit.  Denver is experiencing very dry conditions, but nothing like what Colorado Springs has experienced:

For the year so far Colorado Springs has only received 4.22" of precipitation compared to 12.21" on average.  That is an incredible 7.99" below normal.  The 0.29" observed in July 2008 was the driest ever recorded.  There is too large of a deficit to overcome at many locations along the Front Range to catch up to normal amounts.  It is most certain that 2008 will be a below average year for precipitation and could rank in the top ten for driest years on record at both Colorado Springs and Denver. 

Since August has been very active up to this point with many areas receiving very heavy rainfall I thought it would be nice to see how much precipitation has fallen at certain locations along the I-25 corridor up to date:

There is great variation from location to location which is common in Colorado, but many areas have experienced the heaviest rainfall of the thunderstorm season in just the past week and a half.  Numerous flash flood watches and warnings have been issued and flooding has occurred, most recently in southeast Denver and areas of Arapahoe County where 3.00-4.00" of rain has fallen already this month.  The shower and thunderstorm activity typically dies down towards the end of August so this last gasp of activity will be too little too late to make up for a whole summer of dryness.       

Drought Update

Some areas of drought are beginning to appear once again across much of eastern Colorado.

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

The map below shows forecasted precipitation deviances for August 2008.  Normal precipitation is anticipated most of Colorado, though far southern Colorado is expected to have above normal precipitation for August 2008.

Drought conditions are expected to improve across eastern Colorado over the next 3 months, with no change expected western areas of Colorado.

July Summary

During the month of July 2008 the all time 90 degree streak of 18 consecutive days was broken with 19 days on the 31st, but the streak continued into August and eventually ended at 26 days shattering the old record.  Surprisingly there were not any single day records, but July 2008 ended up being the 3rd warmest July in Denver history.  Temperatures ranged from 100 to 51 with a spread of only 49 degrees which is quite a small range compared to many other months of the year.  The median temperatures was 77.6 degrees, 4.2 degrees warmer than the average of 73.4.  To sum it up July was hot and dry with a measly 0.24" of precipitation for the month.  Normal July precipitation is 2.16", for a monthly deficit of 1.92".  This made July 2008 the 3rd direst on record and the 9th month in a row of below normal precipitation.  For the year only 3.28" of precipitation has been measured which in nearly 6.00" below normal.  The same storm continues to the south as Colorado Springs recorded the driest July ever with 0.29" of precipitation.    

July Stats

TEMPERATURE (IN DEGREES F)

 

 

 

 

 

 

AVERAGE MAX

93.7

NORMAL

88.0

DEPARTURE

5.7

AVERAGE MIN

61.5

NORMAL

58.7

DEPARTURE

2.8

MONTHLY MEAN

77.6

NORMAL

73.4

DEPARTURE

4.2

HIGHEST

100 on the 20th

LOWEST

51 on the 9th

 

 

 

 

 

 

DAYS WITH MAX 90 OR ABOVE

26

NORMAL

15

DAYS WITH MAX 32 OR BELOW

0

NORMAL

0

DAYS WITH MIN 32 OR BELOW

0

NORMAL

0

DAYS WITH MIN ZERO OR BELOW

0

NORMAL

0

 

 

 

 

 

 

TEMPERATURE RECORDS

 

July breaks consecutive 90 degree streak record

 

 

 

 

 

 

 

HEATING DEGREE DAYS

 

 

 

 

 

 

MONTHLY TOTAL

0

NORMAL

1

DEPARTURE

-1

SEASONAL TOTAL

0

NORMAL

1

DEPARTURE

-1

 

 

 

 

 

 

COOLING DEGREE DAYS

 

 

 

 

 

 

MONTHLY TOTAL

395

NORMAL

261

DEPARTURE

134

YEARLY TOTAL

567

NORMAL

422

DEPARTURE

145

 

 

 

 

 

 

PRECIPITATION (IN INCHES)

 

 

 

 

 

 

MONTHLY TOTAL

0.24

NORMAL

2.16

DEPARTURE

-1.92

YEARLY TOTAL

3.28

NORMAL

9.25

DEPARTURE

-5.97

GREATEST IN 24 HOURS

0.17 from 7/07 to 7/08

DAYS WITH MEASURABLE PRECIPITATION

5

 

 

 

 

 

SNOWFALL (IN INCHES)

 

 

 

 

 

 

MONTHLY TOTAL

0.0

NORMAL

0.0

DEPARTURE

0.0

SEASONAL TOTAL

46.3

NORMAL

61.7"

DEPARTURE

-15.4"

GREATEST IN 24 HOURS

N/A

GREATEST DEPTH

N/A

 

 

 

 

 

 

WIND (IN MILES PER HOUR)

 

 

 

 

 

 

AVERAGE SPEED 10.0mph

PEAK WIND GUST

47mph from the west

 

 

 

 

 

 

MISCELLANEOUS WEATHER

 

 

 

 

 

 

NUMBER OF DAYS WITH THUNDERSTORMS

8

NORMAL

11

NUMBER OF DAYS WITH HEAVY FOG

0

NORMAL

< 1

NUMBER OF DAYS WITH HAIL

2

 

 

PERCENT OF SUNSHINE

69%

NORMAL

71%

 

 

 

August Preview

The weather pattern in August is similar to the rest of the summer months but severe weather decreases significantly towards the last couple weeks in the month.  High temperatures begin to decline as sunlight is lost to shorter days.  The occurrence of severe weather such as large damaging hail and tornadoes decreases considerably compared to the months of June and July.  The typical air mass aloft over Denver is nearly as warm as earlier in the summer, but air at the surface is typically a bit cooler resulting in less intense thunderstorms.  Tornadoes and large hail are relatively rare especially after the middle of August, but storm motion is typically slow with light steering winds resulting in August thunderstorms likely producing heavy rainfall as compared to large hail.  By late in the month a fall like cold front can occur, but no snow has ever been recorded at Denver. 

          

DENVER'S NOVEMBER CLIMATOLOGICALLY NORMAL

(NORMAL PERIOD 1971-2000)

 

 

TEMPERATURE

 

 

 

AVERAGE HIGH

86.0

AVERAGE LOW

57.4

MONTHLY MEAN

71.7

DAYS WITH HIGH 90 OR ABOVE

9

DAYS WITH HIGH 32 OR BELOW

0

DAYS WITH LOW 32 OR BELOW

0

DAYS WITH LOWS ZERO OR BELOW

0

 

 

PRECIPITATION

 

 

 

MONTHLY MEAN

1.82"

DAYS WITH MEASURABLE PRECIPITATION

9

AVERAGE SNOWFALL IN INCHES

0

DAYS WITH 1.0 INCH OF SNOW OR MORE

0

 

 

MISCELLANEOUS AVERAGES

 

 

 

HEATING DEGREE DAYS

9

COOLING DEGREE DAYS

217

WIND SPEED (MPH)

8.0mph

WIND DIRECTION

South

DAYS WITH THUNDERSTORMS

8

DAYS WITH DENSE FOG

1

PERCENT OF SUNSHINE POSSIBLE

71%

 

 

EXTREMES

 

 

 

RECORD HIGH

105 on August 8, 1878

RECORD LOW

40 on 24-26 in 1919, 8/22/1904

WARMEST

76.8 degrees in 1937

COLDEST

66.5 degrees in 1915

WETTEST

5.85" in 1979

DRIEST

0.02" in 1924

SNOWIEST

0.0"

LEAST SNOWIEST

0.0"
 

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

 

 Rainfall

May 2008 to September 2008

City

May

June

July

August September

Seasonal Totals

Aurora (Central)

2.17 0.83 1.46     4.46"
Brighton 1.65 0.67 0.59     2.91"
Broomfield 2.01 0.94 0.24     3.28"

Castle Rock 4 NE

1.54 0.55 0.83     2.92"

Colorado Sprgs Airport

0.34 0.52 0.29     1.15"
Denver DIA 1.56 0.73 0.24     2.53"

Denver Downtown

2.40 0.47 0.12     2.99"

Golden

1.93 1.30 0.31     3.54"

Highlands Ranch

2.48 0.35 0.12     2.95"

Lakewood

1.77 0.98 0.51     3.26"

Littleton

2.24 0.59 0.39     3.22"

Parker

1.65 0.71 0.55     2.91"

Sedalia - Hwy 67

2.36 0.35 0.71     3.42"

Thornton

1.77 0.39 0.08     2.24"

Westminster

2.01 0.94 0.24     3.19"

Wheatridge

1.89 0.67 0.47     3.03"