June 2009 Climatic Summary

June was a cool month with temperatures averaging 2 to 4 degrees below normal. All locations reported below normal temperatures. Gillette 4SE in northeast Wyoming was the warm spot averaging 1.1 degrees below normal. Colony in northeast Wyoming was the cold spot averaging 6.0 degrees below normal.
Precipitation in June was average. The wettest areas were across southwest and south central South Dakota where precipitation averaged 125 to 150 percent of normal. The driest areas were across northwestern and west central South Dakota where precipitation was 50 to 75 percent of normal. The wet spot was at Colony in northeast Wyoming, where precipitation was 203 percent of normal. Lodgepole 5SW was the dry spot with only 53 percent of normal precipitation. The precipitation surplus for the month averaged 0.03 inches.
No snowfall was reported during the month of June.

June storm summary...

On June 6…an isolated severe thunderstorm produced quarter size hail 12 miles southwest of Custer.
 
On June 13…an upper level disturbance brought severe thunderstorms to Weston and southern Campbell counties in northeast Wyoming, and across southwest and south central South Dakota. There were numerous reports of nickel to ping pong ball size hail. The largest hail reported was the size of golf balls, 16 miles southwest of Clareton in Weston County, and 20 miles southeast of Hermosa in Custer County. Winds gusting to 65 mph were also reported in Fall River County. Heavy rains associated with these storms produced flooding of streams and creeks across Fall River and Shannon counties.
 
On June 14…a strong upper level disturbance moved across the region producing widespread severe weather across northeast Wyoming and west central South Dakota. There were numerous reports of quarter to half dollar size hail. The largest hail reported was the size of baseballs 9 miles north of Box Elder and 5 miles west of New Underwood. Two tornadoes were also reported, 15 miles north-northwest of Ellsworth AFB and 6 miles east-southeast of Sturgis. These storms also produced flooding of streams and creeks across south central Meade County, central Pennington and Custer counties, and northeast Crook and western Butte counties.
 
On June 15... a strong upper level disturbance moved across the region producing widespread severe weather across northeast Wyoming and western South Dakota.
There were numerous reports of quarter to golf ball size hail. The largest hail reported was the size of tennis balls 13 miles northeast of Ottumwa in Haakon County. The storms also produced heavy rains which resulted in some small stream and creek flooding over northern Campbell County in northeast Wyoming, and over northern Lawrence, southern Butte, central Meade and northeast Perkins counties in western South Dakota.
 
On June 17… an upper level disturbance produced scattered severe thunderstorms over west central and south central South Dakota. Quarter to golf ball size hail and winds to 60 mph were reported over Meade, Tripp and Mellette counties. The largest hail reported was the size of golf balls 2 miles east of Millboro in Tripp County.
 
On June 18…isolated severe thunderstorms produced quarter size hail 7 miles south of Rapid City, and quarter size hail and 70 mph winds 9 miles east of Date in Perkins County. Heavy rain also produced flooding of small streams and creeks across central Pennington and Custer counties.
 
On June 21…an isolated severe thunderstorm produced 60 mph winds 7 miles north of Faith.
 
On June 23…an upper level disturbance brought severe thunderstorms to southwest and south central South Dakota. The storms produced winds of 50 to 60 mph. The strongest wind gust was 63 mph, 6 miles west of Parmelee in Todd County.
 
On June 24...an isolated severe thunderstorm produced quarter size hail 6 miles southwest of White Butte in Perkins County. Another isolated severe thunderstorm produced quarter to baseball size hail in Tripp County. The baseball size hail fell 8 miles north of Witten in Tripp County.
 
On June 25…an isolated severe thunderstorm produced golf ball size hail and 60 mph winds 7 miles southeast of Fairburn in Custer County. Another isolated severe thunderstorm produced 60 mph winds 17 miles northeast of Creighton in Haakon County.
 
 On June 26…an upper level disturbance produced severe thunderstorms across west central and south central South Dakota. There were numerous reports of wind gusts in excess of 60 mph and hail to the size of quarters. Winds gusted to 83 mph at the Rapid City Airport and 80 mph 10 miles east of New Underwood in Pennington County.
 
On June 29…an upper level disturbance produced severe thunderstorms across north central South Dakota. Quarter size hail and wind gusts of 60 to 70 mph were reported across Meade, Perkins and Haakon counties.
 
On June 30…an isolated severe thunderstorm produced half dollar size hail 11 miles west of Ladner and 71 mph winds at Buffalo, both in Harding County.

 LOCAL EXTREMES

Temperature Data

Rapid City

 

Lead

 

Gillette

 

 

Temperature

Date

Temperature

Date

Temperature 

Date

Maximum Temperature

93 degrees

25th

88 degrees

25th

94 degrees

25th

Minimum Temperature

35 degrees

4th, 8th

31 degrees

8th

33 degrees

4th

Precipitation Data

Rapid City

 

Lead

 

Gillette

 

Monthly Data

Amount

Data

Amount

Date

Amount

Date

Precipitation

2.83 inches

 

3.73 inches

 

1.88 inches

 

Snowfall

0.0 inches

 

0.0 inches

 

0.0 inches

 

 

 

 

 

 

 

 

Daily Data

 

 

 

 

 

 

Maximum Precipitation

0.67 inches

14th

0.78 inches

1st

0.53 inches

9th

Maximum Snowfall

0.0 inches

 

0.0 inches

 

0.0 inches

 


REGIONAL EXTREMES

Temperature Data

 

Western South Dakota

 

 

Northeastern Wyoming

 

 

Temperature

Site

Date

Temperature

Site

Date

Maximum Temperature

101 degrees

Edgemont

26th

  96 degrees   
96 degrees

Newcastle
Upton 

26th
25th

Minimum Temperature

27 degrees

Pactola Dam

8th

29 degrees

Wright 12W

8th

Precipitation Data

 

Western South Dakota

 

 

Northeastern Wyoming

 

Monthly Data

Amount

Site

Date

Amount

Site

Date

Maximum Precipitation

5.23 inches 

Wood

 

5.41 inches

Colony

 

Minimum Precipitation

1.69 inches

Lodgepole 5SW

 

1.79 inches

Wright 12W

 

Maximum Snowfall

0.0 inches

 

 

Trace

Wright 12W

 

Minimum Snowfall

0.0 inches

 

 

0.0 inches

 

 

 

 

 

 

 

 

 

Daily Data

 

 

 

 

 

 

Maximum Precipitation

1.98 inches

Oglala 1S

14th

2.50 inches

Colony

14th

Maximum Snowfall

0.0 inches

 

 

Trace

Wright 12W

8th


MONTHLY RECORDS

LOCATION

DATE

NEW RECORD

OLD RECORD

DATE

 

 

NO RECORDS SET

 

 


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