National Weather Service United States Department of Commerce

Heavy Rain in the Appalachians and Central Gulf Coast; Heat Continues in the West; Monitoring the Tropics

Heavy to excessive rainfall over the southern Appalachians and portions of the central Gulf Coast may bring areas of flooding today. Hot temperatures are in place through today across much of the western U.S. and New England. Tropical Storm Erin is forecast to become a Major Hurricane this weekend as it moves across the central Atlantic Ocean. Monitor future forecasts for any East Coast impacts. Read More >

  After two consecutive summers of not reaching 100 degrees at Pierre, the temperature finally reached and surpassed the century mark on July 17th.  At 153 pm CDT on July 17th, the temperature at Pierre topped out at 106 degrees.  It was on September 4th, 2007 (nearly 3 years) when Pierre last reached the century mark when the temperature topped out at 101 degrees. Mobridge has also reached the 100 degree mark this summer which occurred on June 30th.

Recall that last year, Pierre failed to reach 100 degrees in back to back summers (2008 and 2009).  This had never occurred before at Pierre since records have been kept (records in Pierre date back to 1933).  In an average summer, Pierre would normally record a high temperature at or above 100 degrees about 9 times.  In addition, since 1933, there has only been one other year (1993) when temperatures have failed to reach 100 degrees.  Thus, failing to reach this temperature milestone in two consecutive summers was quite a rare event.  It has also been over three years since Aberdeen, Watertown, and Wheaton have reached the 100 degree mark. Listed below are the dates when the temperatures last reached 100 degrees at these three locations.
·         Aberdeen (102F):  July 7, 2007 
·         Watertown (100F): July 7, 2007  
·         Wheaton (100F): - July 8, 2007