August ended as the 8th wettest on record with 6.51″ of rain. September will get off to a wet start with heavy rain expected for Labor Day weekend. Rain and scattered thunderstorms will bring up to 2″ of rain through Monday morning and flooding will be possbile in isolated areas.
St. Louis and the Kansas City area received a soaking Friday, and that swirl of moisture left over from Hurricane Isaac is what will eventually make its way towards Indiana. Central Indiana could see showers anytime after midnight Friday.
As of Friday, the computer models were calling for an inch to an inch and a half of rain on Saturday for central Indiana. With the rain continuing through Sunday, a total of up to two inches could fall through Labor Day weekend. That’s significantly down from previous forecasts earlier in the week that called for up to six inches. The forecast was revised Friday when it became apparent that the storm had changed course.
The heaviest bands of rain will stay in Illinois and Missouri, although central Indiana could see some pockets of heavier downpours anytime throughout the day Saturday.
Sunday brings the best chance of thunderstorms, although central Indiana isn’t likely to see much severe weather with this system. Flooding and lightning are possible, although the tornado threat is low.
The rain will end Monday with a high of 82.