October 2012 Climatic Summary
 
October temperatures generally ranged from near average to a few degrees below average across the area this month. The average monthly temperature was 1.4 degrees below normal across the region. The location with the highest departure in October was Hot Springs, with an average temperature of 0.2 degrees above normal. Spearfish had the coolest departure, at 3.0 degrees below average.
 
Precipitation in October averaged only 46 percent of normal across the entire area. The only location that had near normal precipitation was Newcastle, WY with 1.14 inches. The driest location was Dupree, with only 0.26 inches. On the other end of the spectrum, Lead had 1.66 inches of precipitation for the month.
 
Significant snow fell across parts of the area in October. Several locations reported around an inch of snowfall for the month. Across south central South Dakota, a weather system produced 3 to 4 inches of snowfall during the latter part of the month. The highest October snow totals occurred over the Black Hills. Pactola Dam received 6.5 inches of snow, and Lead received 9.9 inches of snow for the month.
 
October significant storm summary...
 
October 5th – A storm system brought several inches of snow to northeastern Wyoming and the Black Hills area. The heaviest snow totals occurred over the higher elevations of the Black Hills, roughly above 6,000 feet, where 5 to 9 inches of snow fell.
 
October 17th and 18th - An intense storm system tracked across the northern tier of the United States, and produced very strong wind gusts over the Black Hills region. Gusty winds developed behind a cold front that crossed the area late Tuesday, the 16th. Winds increased early Wednesday morning, the 17th. The highest gust recorded on the 17th was 73 mph near Parmelee on the Rosebud Indian Reservation. On Thursday the 18th, the highest gust was 81 mph at the National Weather Service office in Rapid City.
 
October 24th and 25th – Another storm system brought several inches of snow to parts of northeastern Wyoming, the southern portion of the Black Hills, and southern stretches of South Dakota. Many locations picked up 2 to 4 inches of snow.
 
 
LOCAL EXTREMES
Rapid City
Lead
Gillette
Temperature
Temperature
Date
Temperature
Date
Temperature
Date
Max. Temp.
82
2nd
75
2nd
83
2nd
Min. Temp.
21
26th
15
26th
18
26th
Precipitation
Rapid City
Lead
Gillette
Monthly Data
Amount
Date
Amount
Date
Amount
Date
Precipitation
0.57
 
1.66
 
0.94
 
Snowfall
0.1
 
9.9
 
2.0
 
Daily Data
Amount
Date
Amount
Date
Amount
Date
Max. Precipitation
0.28
24th
0.47
17th
0.34
17th
Max. Snowfall
0.1
24th
4.2
24th
1.0
9th

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