Tuesday, May 26, 2009

Return of Severe Weather?!?

A small area of 'See Text' as issued by the Storm Prediction Center covers extreme southeast Iowa today for the risk of an isolated brief tornado. This is in regards to a weak warm core low that has spun across Missouri the past two days, and is continuing to move northward near the Iowa/Missouri border by late this afternoon. The previous two days with this low have brought tornado warnings and even a couple of reports of tornadoes in extreme southeast Missouri on Sunday. Instability and shear are slightly weaker, thus we don't expect anything other than a storm or two that may be able to exhibit rotation across extreme southeast Iowa and adjacent areas. Other areas across the state should see isolated thunderstorms or showers through much of the day as they move northwest with the weak surface low. Temperatures will struggle with the cloudy and rainy conditions, only reaching the the lower 60s to lower 70s from northwest to southeast.

Lingering showers possible across western and central regions tonight, likely over the eastern third of the state. And then isolated showers across the state on Wednesday, and possibly into Wednesday night for the eastern sections of the state. We then look towards clear skies for the remainder of the week, with the only additional chance of thunderstorms coming into the forecast for western Iowa on Saturday. More details on these thunderstorm chances and the return of severe weather being possible for the plains states in later updates...

Wednesday highs in the 60s across the state; Thursday in the mid 70s to lower 80s from east to west; and Friday highs from the mid 70s to mid 80s from east to west as well. Tonight's lows in the from near 50 in the northwest to near 60 in the southeast; overnight lows on Wednesday night from the upper 40s to upper 50s from northwest to southeast. Lows on both Thursday and Friday night will be into the mid to upper 50s across the entire state, as moisture begins to be pushed into the state under stronger southerly winds.

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