January 2007 Climatic Summary

Mild temperatures and dry weather dominated the weather through January 10. A weak upper level font-size:8.0pt; font-weight:400; font-style:normal; text-decoratiostorm system brought some light snow on January 4 with areas on the plains receiving an inch or less. In the northern Black Hills and Bear Lodge mountains 2 to 4 inches fell. On January 8 the northern Black Hills and Bear Lodge mountains received 6 to 9 inches of upslope snows...with little or no snow elsewhere. Colder air moved into the region for January 11 through 15. Periods of light snow fell during this period with snowfall generally 1 to 2 inches. Mild temperatures returned to the region from January 16 through 26. On January 18 the northern Black Hills and Bear Lodge mountains receive another 6 to 9 inches of upslope snows...with little or no snow elsewhere. A weak upper level storm system brought light snow to the region on January 21 with snowfall generally an inch or less. Colder weather returned for January 27 through 31. Some light snow fell on the plains while 2 to 4 inches of snow fell in the northern Black Hills and Bear Lodge mountains. Temperatures averaged 3 to 6 degrees above normal in January, with only Custer and Pactola Dam reporting below normal temperatures. Averages ranged from 1.4 degrees below normal at Custer to 8.3 degrees above normal at Lemmon.

January was a dry month, with only the northern Black Hills, Bear Lodge mountains and portions of extreme southwestern South Dakota reporting above normal precipitation. On the plains of northeastern Wyoming and western South Dakota precipitation averaged 30 to 40 percent of normal. Several locations reported less than 10 percent of normal precipitation. Precipitation ranged from 148 percent of normal at Ardmore 2N to 3 percent of normal in Kadoka where only 0.01 inches of precipitation was recorded. Rainfall deficits for the month averaged 0.26 inches. Snowfall across the northern Black Hills and Bear Lodge mountains averaged 20 to 30 inches.

On the plains of western South Dakota and northeastern Wyoming snowfall was generally 2 to 5 inches with several locations receiving and inch or less.

LOCAL EXTREMES

Temperature Data Rapid City   Lead   Gillette  
  Temperature Date Temperature Date Temperature  Date
Maximum Temperature 62 degrees 10th, 25th 59 degrees 25th 53 degrees 10th, 24th
Minimum Temperature -4 degrees 30th -13 degrees 12th -14 degrees 12th
Precipitation Data Rapid City   Lead   Gillette  
Monthly  Data Amount Data Amount Date Amount Date
Precipitation 0.12 inches   1.58 inches   0.10 inches  
Snowfall 0.4 inches   34.0 inches   4.0 inches  
             
Daily Data            
Maximum Precipitation .06 inches 8th 0.54 inches 8th 0.04 inches 20th
Maximum Snowfall 0.2 inches 11th 8.5 inches 18th 2.0 inches 20th

REGIONAL EXTREMES

Temperature Data   Western South Dakota     Northeastern Wyoming  
  Temperature Site Date Temperature Site Date
Maximum Temperature 64 degrees Maurine 10SW 26th 64 degrees Colony 25th
Minimum Temperature -18 degree Usta 8WNW 12th -21 degrees Upton 14ENE 13th
Precipitation Data   Western South Dakota     Northeastern Wyoming  
Monthly Data Amount Site Date Amount Site Date
Maximum Precipitation 1.58 inches Lead   0.52 inches  Devil's Tower  
Minimum Precipitation Trace Ludlow 3SSE   0.02 inches Upton  
Maximum Snowfall 34.0 inches Lead   8.3 inches Upton 14ENE  
Minimum Snowfall 0.0 inches Usta 8WNW   1.0 inches Moorcroft  
             
Daily Data            
Maximum Precipitation 0.54 inches Lead 8th 0.34 inches Devil's Tower 4th
Maximum Snowfall 8.5 inches Lead 18th 4.0 inches Upton 14ENE 12th

MONTHLY RECORDS

LOCATION DATE NEW RECORD OLD RECORD DATE
Faith January Trace Snowfall Trace Snowfall Last Year 1997
Newell January 0.02 Inches precipitation 0.02 Inches precipitation Last Year 1992
Redig 11N January Trace Snowfall Trace Snowfall Last Year 1995

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