June 2010 Climatic Summary

 
June temperatures were slightly cooler than normal, averaging 0.5 to 1.5 degrees below normal. Cottonwood was the warm spot averaging 0.4 degrees above normal. The cold spot was in Newell where temperatures averaged 3.0 degrees below normal.
Precipitation in June was well above, averaging 30 to 50 percent above normal. The wettest areas were from central Ziebach County south to northern Haakon County where precipitation was 200 to 300 percent of normal. The driest areas were across northwestern South Dakota where precipitation was 60 to 80 percent of normal. The wet spot was at Dupree 15 SSE, where precipitation was 279 percent of normal. Glad Valley 2W was the dry spot with only 45 percent of normal precipitation. The precipitation surplus for the month averaged 1.07 inches.
No snowfall was reported in June.
 

June storm summary...

On June 1…A strong upper level disturbance produced severe thunderstorms with large hail and heavy rains across south central South Dakota. There were numerous reports of hail to the size of quarters across Todd and Tripp counties. Heavy rains of 1.5 to 3.0 inches in less than an hour produced minor flooding of streams and creeks with water running over some county roads across Todd and Tripp counties.

On June 4…An isolated severe thunderstorm brought 60-70 mph winds to Fall River and Shannon counties.
 
On June 10…An isolated severe thunderstorm brought large hail and damaging winds to Shannon, Jackson and Mellette counties. Winds of 60 mph were reported 7 miles north of Pine Ridge. The largest hail reported was 1.5 inches in diameter 4 miles west of Kadoka in Jackson County and 8 miles southeast of White River in Mellette County.
 
On June 16…An upper level disturbance brought large hail, damaging winds and tornadoes to the region. Several tornadoes were reported near Dupree and Red Elm in Ziebach county causing damage to numerous structures. Nearly 5 inches of rain fell in Dupree causing flash flooding. Large hail also fell across Custer and Fall River counties with 2.5 inch diameter hail being reported near Smithwick in Fall River County. In northeast Wyoming quarter size hail and 60 mph winds were reported across northern Campbell County.
 
On June 19…An upper level disturbance brought large hail and damaging winds to southwest and south central South Dakota. The largest hail reported was 2.0 inches in diameter in Hot Springs in Fall River County. Wind gusts to 60 mph were reported 10 miles southeast of Scenic in Shannon County.
 
On June 20… A strong upper level disturbance produced widespread severe weather across northeast Wyoming and western South Dakota. An EF1 tornado touched down near Wall in Pennington County, damaging planes and hangers at the airport and knocking down numerous trees. There were numerous reports of large hail across the region, and a few reports of damaging straight line winds in excess of 60 mph. The strongest straight line winds reported were 70 mph, 20 miles north-northwest of Spotted Horse in Campbell County Wyoming. The largest hail reported was the size of golf balls, reported at several locations.
 
On June 21… A strong upper level disturbance produced widespread severe weather across northeast Wyoming and western South Dakota. There were numerous reports of damaging winds in excess of 60 mph, and large hail across the region. The strongest  wind gusts reported was 79 mph, 3 miles southeast of Lemmon in Perkins County. Winds of 75 mph were also reported 10 miles southwest of Ladner in Harding County.  The largest hail reported was the size of golf balls, 4 miles southeast of Dewey in Fall River County.
 
On June 22…A strong upper level disturbance produced widespread severe weather across northeast Wyoming and western South Dakota. A small tornado touched down briefly near Upton in Weston County. There were numerous reports of damaging straight line winds in excess of 60 mph and large hail across the region. The strongest straight line winds reported were 80 mph, 15 miles southeast of Gillette in Campbell County, which blew numerous power poles over. The largest hail reported was the size of golf balls, 18 miles west of Gillette in Campbell County.
 
On June 25…An isolated severe thunderstorm produced 60 mph winds 10 miles south of Mud Butte, and 10 miles southeast of Opal, both in Meade County.
 
On June 26…A strong upper level disturbance produce widespread severe weather across the western South Dakota plains. The largest hail reported was the size of golf balls reported in Rapid City, 20 miles north of Faith in Perkins County and near Allen in Bennett County. There were numerous reports of wind gusts to 60 mph.
 
On June 30…An isolated severe thunderstorm produced 2.5 inch diameter hail 14 miles northwest of Weston in Campbell County and 87 mph winds 25 miles north of Weston. 

LOCAL EXTREMES

Temperature Data

Rapid City

 

Lead

 

Gillette

 

 

Temperature

Date

Temperature

Date

Temperature 

Date

Maximum Temperature

91 degrees

30th

89 degrees

30th

94 degrees

30th

Minimum Temperature

42 degrees

15th

38 degrees

15th

33 degrees

18th

Precipitation Data

Rapid City

 

Lead

 

Gillette

 

Monthly Data

Amount

Data

Amount

Date

Amount

Date

Precipitation

4.57 inches

 

4.49 inches

 

3.73 inches

 

Snowfall

0.0 inches

 

0.0 inches

 

0.0 inches

 

 

 

 

 

 

 

 

Daily Data

 

 

 

 

 

 

Maximum Precipitation

0.79 inches

22nd

1.01 inches

23rd

1.38 inches

23rd

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

Bear Ridge

30th

97 degrees

Weston 1E

30th

Minimum Temperature

36 degrees

Mount Rushmore

6th

31 degrees

Upton 14 ENE

18th

Precipitation Data

 

Western South Dakota

 

 

Northeastern Wyoming

 

Monthly Data

Amount

Site

Date

Amount

Site

Date

Maximum Precipitation

8.30 inhces

Dupree 15 SSE

 

4.36 inches

Devils Tower

 

Minimum Precipitation

1.32 inches

Glad Valley 2W

 

2.08 inches

Colony

 

Maximum Snowfall

0.0 inches

 

 

0.0 inches

 

 

Minimum Snowfall

0.0 inches

 

 

0.0 inches

 

 

 

 

 

 

 

 

 

Daily Data

 

 

 

 

 

 

Maximum Precipitation

4.86 inches

Dupree

17th

2.32 inches

Devils Tower

23rd

Maximum Snowfall

0.0 inches

 

 

0.0 inches

 

 

 
MONTHLY RECORDS

 

LOCATION

DATE

NEW RECORD

OLD RECORD

DATE

Dupree

06/17/2010

4.86 inches precipitaton

3.38 inches precipitation

06/05/2008


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