Excessive Rainfall in the Southern Plains; Extreme Heat Coming to the Southwest U.S.

Heavy to severe thunderstorms may bring areas of excessive rainfall and flooding over parts of the southern Plains through Friday. A Slight Risk of excessive rainfall has been issued. Dangerously hot temperatures are forecast across parts of southern Arizona and far southeastern California Saturday through Monday. An Extreme Heat Watch has been issued. Read More >

After two consecutive summers of not reaching 100 degrees at Pierre, the temperature finally reached and surpassed the century mark on July 17^th. At 153 pm CDT on July 17^th, the temperature at Pierre topped out at 106 degrees. It was on September 4^th, 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

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Excessive Rainfall in the Southern Plains; Extreme Heat Coming to the Southwest U.S.

Pierre Finally Tops 100 Degrees on July 17th, 2010