July 2013 Climatic Summary
 
July 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 1.8 degrees below normal, while the location with the warmest departure was Dupree, at 2.4 degrees above normal.
 
Precipitation in July averaged around 94 percent of normal across the entire area.  Northeast Wyoming and southwestern South Dakota where above average for precipitation. Much of the South Dakota plains only averaged about 60% of normal precipitation for July.
 
July storm summary...
 
After a fairly quiet first week in July, a change in the weather pattern occurred, bringing nearly a daily occurrence of thunderstorms to much of the area. Some of the more notable days are listed below.
 
July 8th – An area of low pressure moved from the Northern Rockies into the Northern Plains, producing showers and storms across the area. Some of the stronger storms produced up to baseball sized hail from the Hayward to Hermosa area, and 70 to 85 mph wind gusts across Harding County.
 
July 20th – Another low pressure system moved across the northern plains, producing showers and storms across the Black Hills area. One storm produced golf ball sized hail from Hisega through the northern portions of Rapid City. Another storm produced golf ball sized hail northwest of Union Center. Many other locations across the Black Hills area received quarter to half dollar sized hail.
 
July 23rd – A strong low pressure system crossed the Northern Plains, producing widespread showers and storms. Golf ball to tennis ball sized hail fell from the Sheridan Lake area, south to the Custer area. Golf ball sized hail also fell in parts of Ziebach County and also in Jackson and Todd counties. Very strong winds of 80 mph were associated with a few of these storms.
 
July 30th – A weak area of low pressure moved out of Wyoming into western South Dakota, producing a few strong storms across the central and southern South Dakota plains. Golf ball sized hail fell in the Philip and Kadoka area, and tennis ball sized hail fell near St. Francis. Many of these storms produced 60 to 70 mph wind gusts. A weak tornado briefly touched down just west of Philip.
 
LOCAL EXTREMES
Rapid City
Lead
Gillette
Temperature
Temperature
Date
Temperature
Date
Temperature
Date
Max. Temp.
98
11th
92
11th
99
11th
Min. Temp.
51
27th,28th
47
27th,28th
51
26th
Precipitation
Rapid City
Lead
Gillette
Monthly Data
Amount
Date
Amount
Date
Amount
Date
Precipitation
2.32
 
3.42
 
3.00
 
Snowfall
0.0
 
0.0
 
0.0
 
Daily Data
Amount
Date
Amount
Date
Amount
Date
Max. Precipitation
0.77
19th
0.98
14th
0.90
16th
Max. Snowfall
 
 
 
 
 
 

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