January 2013 Climatic Summary
 
January temperatures across the entire region were spot-on average for the month. The location with the coolest departure from average was Newell, which was -2.6 degrees below normal, while the location with the warmest departure was Winner, at 3.4 degrees above normal.
 
Precipitation in January averaged around 114 percent of normal across the entire area.  The wettest/snowiest areas were over the northern Black Hills and Bear Lodge Mountains, and across southwestern portions of South Dakota, where 150 to 250 percent of normal precipitation was reported. The driest areas were across the northwestern South Dakota plains, where precipitation averaged 20 to 60 percent of normal. Snowfall was the heaviest over the northern Black Hills into the Bear Lodge Mountains where 1 to 3 feet of snow fell. Lead reported 2.22 inches of precipitation, and 38.5 inches of snow this month.
 
January storm summary...
 
January 2nd – A strong low pressure system and cold front moved through the Northern Plains. Upslope conditions brought 6 to 12 inches of snowfall across the northern and central Black Hills and the Bear Lodge Mountains. Several inches of snow were reported across portions of southwestern South Dakota.
 
January 9th – Late in the evening, the Spearfish area experienced a downslope wind event, with several hours of wind gusts between 50 and 70 mph.
 
January 11th – A strong low pressure system moved out of the central Rockies and into the Northern Plains, bringing several inches of snow to southwestern and central South Dakota. A band of 6 to 12 inches of snow fell from the central and southern Black Hills, east through the Badlands and Shannon County.
 
January 31st – The combination of Arctic high pressure over the Northern Plains, and weak low pressure along a stationery front in eastern Wyoming, brought light to moderate overrunning snow to parts of Northeast Wyoming and far western South Dakota. Several inches of snow fell across this area, with 4 to 6 inches falling across the higher elevations of the Black Hills.
 
LOCAL EXTREMES
Rapid City
Lead
Gillette
Temperature
Temperature
Date
Temperature
Date
Temperature
Date
Max. Temp.
59
9th
56
9th
55
26th
Min. Temp.
-2
30th
-4
12th
-2
14th, 30th
Precipitation
Rapid City
Lead
Gillette
Monthly Data
Amount
Date
Amount
Date
Amount
Date
Precipitation
0.42
 
2.22
 
0.40
 
Snowfall
7.7
 
38.5
 
7.7
 
Daily Data
Amount
Date
Amount
Date
Amount
Date
Max. Precipitation
0.25
11th
0.74
2nd
0.20
31st
Max. Snowfall
3.7
11th
14.9
2nd
4.0
31st
 

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