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May 21, 2010 09:25 AM

Storm Center Update-Friday AM

A few isolated sprinkles have developed this morning across KELOLAND, but most areas will be dry and partly cloudy this afternoon with highs in the 70s once again. Winds will be lighter too, especially in Sioux Falls at 5-15 mph from the north, switching to the south by this afternoon.

The weather will become more active late this afternoon with t-storms possible in western KELOLAND. Those scattered t-storms are expected to drift across the rest of KELOLAND overnight, so don’t to hear some thunder after midnight with a 30-40% chance of rain.

Tomorrow will be warmer and windy across the eastern 2/3rds of KELOLAND with afternoon highs in the 80s…near 90 in Pierre. Winds will be from the south at 20-40mph during the afternoon and the humidity will become noticeable for the first time this season. Scattered t-storms are possible early in the morning across northeastern KELOLAND, but we’ll be watching the west late in the afternoon for more storms along a cold front in the Rapid City area by Saturday evening. There could also be scattered severe storms in central South Dakota by early evening as a dry line sets up in this region. The atmosphere will be capped in much of eastern KELOLAND, making it hard for storms to fire. Having said that, any storms that do develop, especially between the Missouri Valley and the James Valley would be severe with hail the main threat.

The front will cross South Dakota Sunday, firing more storms in NW IA by Sunday evening, and then move back into central KELOLAND on Monday. This front will be moving back and forth across our area the next several days, so chances of t-storms will continue much of next week.