Monday, April 18, 2011

Still breezy with moderate fire threat...Warm air lifts north today as a weak upper air disturbance exits to the northeast. Temperatures fall into the upper 40s tonight as another strong low pressure system gathers steam & crosses the Ohio Valley. Isoalted rain showers and thunderstorms will are possible tonight, into Tuesday.

Steady southwest air flow ahead of the front will put daytime highs in the lower 70s Tuesday. Chance for rain and a few rumbles of thunder will continue early Tuesday morning. However, we're not expecting much in the way of significant rainfall with that initial push Tuesday. Temperatures stay mild Tuesday night, in the low 50s.

Actual front will arrive during the day Wednesday. Breezy conditions will redevelop Wednesday as the pressure gradient tightens with the approaching front. Temperatures top out in the low 80s. Still not impressed with overall dynamics of Wednesday weather. However, we cannot rule out significant downpours in a few localized areas. Any areas that received significant rainfall on Tuesday would need to watch for flash flooding problems during the day Wednesday. Up to an inch of new rainfall could occur before things clear up. However, flooding will most likely plaque parts of  western IL, IN, OH, KY & TN during this unsettled week of weather.

Cool air will sink into the area behind the front as high pressure builds into the area Wednesday night. This will drop temperatures into the mid to upper 40s under clearing skies Wednesday night.

The setup for Thursday will be sunny and tranquil with temps hitting the low 60s. Warm front Friday could bring a few sprinkles. Cold front & chance for more thunder arrives Saturday.