June 2013 Climatic Summary
 
June temperatures across the entire region were very close to average for the month. The location with the coolest departure from average was Wood, which was 2.1 degrees below normal, while the location with the warmest departure was Newcastle, at 1.3 degrees above normal.
 
Precipitation in June averaged around 75 percent of normal across the entire area.  Northeast Wyoming, the northern Black Hills, and Bear Lodge Mountains where near normal for precipitation. South central South Dakota only averaged about 50% of normal precipitation for June.
 
June storm summary...
 
June 1st – Heavy rain fell across the northern Black Hills area, producing minor flooding in Belle Fourche, Hulett, Sundance, and Spearfish.
 
June 11th – A broad area of low pressure helped initiate showers and thunderstorms across Northeast Wyoming and western South Dakota. Nickel to half dollar sized hail was reported in a few locations, along with 60 mph wind gusts.
 
June 17th – A stationary frontal boundary was the focus for storm development across the Black Hills area. Dime to golf ball sized hail fell from several storms, including some 2 inch diameter hail in the Mt. Rushmore area.
 
June 21st & 22nd – A strong low pressure system moved out of the central Rockies and into the northern Plains, producing widespread severe weather over the course of two days. The strongest storms moved across the Black Hills area on the 21st, producing penny to golf ball sized hail. A few storms that crossed Custer and Jackson counties produced tennis ball to softball sized hail near Argyle, Fairburn, and south of Interior. Wind gusts of 60 to 70 mph were also observed. Another round of storms developed across the area on the 22nd. These storms produced a little less hail, but a lot more wind than the previous day. Wind gusts to 80 mph were reported near Sundance, WY and also near Red Elm, SD.
 
 
LOCAL EXTREMES
Rapid City
Lead
Gillette
Temperature
Temperature
Date
Temperature
Date
Temperature
Date
Max. Temp.
88
27th
79
19th, 24th, 27th
87
24th
Min. Temp.
43
2nd
34
1st
33
5th
Precipitation
Rapid City
Lead
Gillette
Monthly Data
Amount
Date
Amount
Date
Amount
Date
Precipitation
1.67
 
2.67
 
3.07
 
Snowfall
 
 
 
 
 
 
Daily Data
Amount
Date
Amount
Date
Amount
Date
Max. Precipitation
0.51
21st, 22nd
1.22
1st
0.77
22nd
Max. Snowfall
 
 
 
 
 
 

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