October 2007 Climatic Summary

The month of October started out hot and dry with highs in the 80s to lower 90s. On October 2 cooler weather returned with temperatures staying near normal through October 12.  A strong upper level storm system moved through the central plains October 13 through 16 bringing 1 to 3 inches of rain to southwestern and south central South Dakota. Elsewhere across western South Dakota 0.25 to 0.75 inches of rain fell with less than 0.25 inches falling in northeastern Wyoming. Dry and cool weather returned for October 17. Another upper level storm system moving through the central plains brought 1 to 2 inches of rain from October 18 through 21 to southwestern and south central South Dakota, with lighter amounts again falling to the north and west. October 22 through 26 saw a return to dry weather and above normal temperatures.  October 26 and 27 saw a brief cool down before warmer temperatures returned for October 28 through 30. The last day of October saw cooler than normal temperatures return to the area.
October was another warm month with temperatures averaging 2 to 4 degrees above normal. For the second straight month, all reporting sites reported above normal temperatures. Temperatures ranged from 4.3 degrees above normal in Spearfish to 1.0 degrees above normal at Long Valley and Colony, Wyoming.
Across the region, October saw near normal precipitation, with well above normal rainfall across southern areas and drier than normal conditions to the north. The wettest areas were across south central and southwestern South Dakota, and across the southern portions of Campbell and Weston counties in northeastern Wyoming where rainfall was 150 to 300 percent of normal. Elsewhere, rainfall was generally 50 to 70 percent of normal.  The wet spot was Cedar Butte 1N where rainfall was 343 percent of normal, while Red Owl was the dry spot with only 16 percent of normal rainfall. Rainfall deficits for the month averaged 0.06 inches.
Snowfall was sparse in the month of October with only the Black Hills and northeastern Wyoming reporting measurable snowfall. Snow totals were generally 2 to 5 across for the month across these areas.


Temperature Data Rapid City   Lead   Gillette  
  Temperature Date Temperature Date Temperature  Date
Maximum Temperature 89 degrees 1st  76 degrees 1st,  5th 79 degrees 1st
Minimum Temperature 23 degrees 28th  25 degrees 31st 21 degrees 27th,  31st
Precipitation Data Rapid City   Lead   Gillette  
Monthly  Data Amount Data Amount Date Amount Date
Precipitation 0.61 inches   1.75 inches   1.54 inches  
Snowfall 0.0 inches   3.0 inches   1.8 inches  
Daily Data            
Maximum Precipitation 0.32 inches 13th  2.8 inches 18th 0.84 inches 7th
Maximum Snowfall 0.0 inches   0.82 inches 18th 1.8 inches 7th


Temperature Data   Western South Dakota     Northeastern Wyoming  
  Temperature Site Date Temperature Site Date
Maximum Temperature 93 degrees Cottonwood 2E 2nd 86 degrees Colony 1st
Minimum Temperature 13 degrees Ladner 9SW 28th 12 degrees Upton 14ENE 31st
Precipitation Data   Western South Dakota     Northeastern Wyoming  
Monthly Data Amount Site Date Amount Site Date
Maximum Precipitation 5.14 inches Cedar Butte   2.24 inches Rockypoint 1N  
Minimum Precipitation 0.24 inches Red Owl   0.82 inches
0.82 inches
Maximum Snowfall 3.0 inches Lead   4.5 inches Wright 12W  
Minimum Snowfall 0.0 inches Several Locations   0.0 inches Several Locations  
Daily Data            
Maximum Precipitation 2.26 inches Cedar Butte 7th 0.84 inches Gillette 4SE 7th
Maximum Snowfall 2.8 inches Lead 18th 2.7 inches Wright 12W 7th



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