<%@LANGUAGE="JAVASCRIPT" CODEPAGE="1252"%> August 2008 and Summer 2008 Saint Cloud Weather Summary
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Streamflow from Minnesota DNR Waters

Some Late Month Relief From the Summer Dryness

Saint Cloud Weather Summary for August 2008 and Summer 2008

Issued: Wednesday, September 3, 2008 10:55 AM

For the third straight year, St. Cloud had a major dry period during the summer. While much of August intensified the dry conditions, two major rainfall events on the 3rd and the 25th eased the conditions considerably.

The total August rainfall at St. Cloud Regional Airport was 4.18 inches, 0.25 inch above normal. However, all of the rain only fell on 5 days, the fewest number of days in August with measurable rainfall since 1996. St. Cloud had nearly its own private rainstorm on August 3rd as the Airport received 2.36 inches, the most daily rainfall in St. Cloud since October 4, 2005 when 3.42 inches fell (nearly the same amount of rain, 2.35 inches, fell on August 24, 2006). The second rainfall of August 27 produced 1.42 inches at the St. Cloud Airport and dumped 2-3 1/2 inches of rain along the I-35 corridor from Grand Marais and Duluth into the Twin Cities Metropolitan Area.

Before the second rainfall, St. Cloud's rainfall shortage between June 15 and August 25 was 3.76 inches (5.14 actual; 8.90 normal). The August 29 growing season rainfall from the Minnesota State Climatology Office showed a rain shortfall of 5-7 inches from Wright and southern Benton Counties through the Twin Cities Metropolitan Area. The rain shortfall caused parts of Minnesota to be ranked in moderate drought conditions by the National Drought Mitigation Center's Drought Monitor. Before the August 25 rainfall, streamflow, as shown by the Minnesota DNR Waters streamflow map, was in the lowest 10% of years along the Upper Mississippi River, the Upper St. Croix, and along the Mississippi and its tributaries from St. Cloud through the Twin Cities. Despite the late month rainfall, the mid-summer rainfall deficit still stood at 3.09 inches and streamflow was still only in the lowest 25% of years from St. Cloud to the Twin Cities with continued very low streamflow to our north and east.

During the entire meteorological summer (June 1-August 31), Saint Cloud had 9.95 inches of rain, 1.83 inches short of the normal summer rainfall.

Because of the rainy spring, crops have progressed fairly well in Minnesota, according to the weekly Minnesota Ag Newsletter from the USDA. In fact, the warm dry weather towards the end of the month helped wheat and oat harvests to return to near normal. Still, about 50% of the Minnesota topsoil was listed as being short or very short of moisture.

The St. Cloud area did miss a heavy Red River Valley rain event that produced up to 3-4 1/2 inches in west central Minnesota. That Upper Red River Valley is one of the few areas with above normal rainfall on the growing season rainfall map in the August 29 growing season rainfall report.

Still, the summer dry spell does not even approach the six and a half inch rainfall shortage by this time in 2007 and the four and three-quarters inch shortfall in 2006.

Normally, The Temperatures Aren't Quite As Normal

August was the only month of the 2008 summer that was significantly warmer than normal. The Saint Cloud Regional Airport averaged 68.4°F in August, which was 1.2°F above normal. The warmer weather produced 20 days with a high of at least 80°F, pushing the average temperature a bit above normal. However, only August 17 had a high cracking 90-degrees. The summer of 2008 had only three days with a high of at least 90, the fewest number of 90-degree highs since 1993.

The remarkable part of this summer in St. Cloud was how normal the temperatures were. In June and July combined, there were only 4 days with an average temperature more than 6 degrees away from normal. In August 2008, St. Cloud more than doubled that total (7 days), thanks to six straight days of above normal temperatures between the 17th and the 22nd. Still, only 11 of the 92 days had an average temperature more than 6 degrees from normal.

While late August into early September had some of the warmest temperatures seen all summer, the weather pattern changed quickly after the Labor Day Weekend. The steering winds in western North America pushed back into the US after spending much of the previous month along or even north of the Canadian border. That has set up the St. Cloud area for cooler than normal temperatures for most of the first week of September. Beyond that, there are no strong trends.

 

Streamflow from Minnesota DNR Waters

    August 2008 Statistics

Temperatures (°F)
August 2008
Normal
August 2008 Average High Temperature (°F)
81.6
78.9
August 2008 Average Low Temperature (°F)
55.2
55.5
August 2008 Mean Temperature for August (°F)
68.4
67.2
August Extremes
Temperature(°F)
Date
Warmest High Temperature for August 2008 (°F)
91
August 18th
Coldest High Temperature for August 2008 (°F)
71
August 27th
Warmest Low Temperature for August 2008 (°F)
64
August 3rd,22nd
Coldest Low Temperature for August 2008 (°F)
44
August 24th,25th
Record Temperatures in August 2008
Temperature(°F)
Date
Old Record
No Temperature Records Set
Temperature Thresholds
Number of Days
Normal
August 2008 Days with High Temperatures >= 100°F
0
0.06
2008 Total Days with High Temperature of At Least 100°F
0
0.51
August 2008 Days with High Temperatures >= 90°F
1
3.13
2008 Total Days with High Temperature of At Least 90°F
3
11.43
August 2008 Days with Low Temperatures >= 70°F
0
0.68
2008 Total Days with Days with Low Temperatures >= 70°F
0
3.00
August 2008 Days with Low Temperatures >= 75°F
0
0.07
2008 Total Days with Days with Low Temperatures >= 75°F
0
0.47
Precipitation (in)
August 2008
Normal
August 2008 Precipitation (in)
4.18
3.93
August Extremes
Precipitation (in)
Date
Most Daily Precipitation in August 2008
2.36
August 3rd
Record Precipitation in August 2008
Precipitation (in)
Date
Old Record
No records set
Precipitation Thresholds
Number of Days
Normal
August 2008 Days with Measurable (>= 0.01 inch) Precipitation
5
9.0
August 2008 Days with >= 0.10 inch Precipitation
3
5.6
August 2008 Days with >= 0.25 inch Precipitation
3
3.9
August 2008 Days with >= 0.50 inch Precipitation
2
2.4
August 2008 Days with >= 1.00 inch Precipitation
2
1.0
Streamflow from Minnesota DNR Waters

Summer (June 1-August 31) 2008 Statistics

Temperatures (°F)
Summer 2008
Normal
Summer 2008 Average High Temperature (°F)
80.3
79.3
Summer 2008 Average Low Temperature (°F)
55.5
55.4
Summer 2008 Mean Temperature for Summer (°F)
67.9
67.4
Temperature Thresholds
Number of Days
Normal
Summer 2008 Days with High Temperatures >= 90°F
3
10.00
Summer 2008 Days with Low Temperatures >= 70°F
0
2.81
Summer 2008 Days with Low Temperatures >= 75°F
0
0.45

 

Link to Table of Top 10 Warmest/Coldest Summers
Precipitation (in)
Summer 2007
Normal
Summer 2008 Rainfall (in)
9.95
11.78
2008 Growing Season (April 1 - August 31) Rainfall (in)
16.72
16.88
2008 Dry Period Rainfall (June 15 - August 25) Rainfall (in)
5.14
8.90
2008 June 15 - August 31 Rainfall (in)
6.56
9.65
2008 Total Precipitation (in)
18.90
19.73
Precipitation Thresholds
Number of Days
Normal
Summer 2008 Days with Measurable (>= 0.01 inch) Precipitation
27
29.1
Total 2008 Days with Measurable (>= 0.01 inch) Precipitation
65
68.2
(Annual Normal: 97.3)
Summer 2008 Days with >= 0.10 inch Precipitation
14
18.9
Total 2008 Days with >= 0.10 inch Precipitation
35
38.1
(Annual Normal: 52.9)
Summer 2008 Days with >= 0.25 inch Precipitation
9
13.1
Total 2008 Days with >= 0.25 inch Precipitation
21
24.0
(Annual Normal: 32.1)
Summer 2008 Days with >= 0.50 inch Precipitation
5
7.8
Total 2008 Days with >= 0.50 inch Precipitation
9
12.7
(Annual Normal: 16.8)
Summer 2008 Days with >= 1.00 inch Precipitation
4
3.1
Total 2008 Days with >= 1.00 inch Precipitation
6
4.1
(Annual Normal: 5.5)

 

Streamflow from Minnesota DNR Waters


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All climate data provided courtesy of NOAA/NWS
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and Minnesota Climatology Working Group, including the Minnesota State Climatologist's Office, University of Minnesota-Saint Paul Campus.

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Last updated: Wednesday, September 3, 2008 10:55 AM
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