Lows Wednesday morning were downright cold for this time of year! Indianapolis dropped to 42 officially, the coldest since 42 on May 10th. Many outlying spots dropped into the 30s with some brief patchy frost. We’ll turn milder for Thursday with increasing clouds and enough wind to keep a repeat from happening. Lows Thursday morning will be in the 40s to around 50 degrees. Then we’ll rebound into the milder 70s by afternoon with periods of clouds and sun. A cold front moves through, but it won’t have much moisture to work with, so we should stay mainly dry Thursday.
That changes Friday when a strong area of low pressure moves through the state. We could have rain, possibly heavy, with the chance of thunderstorms, especially for areas south of I-70. Rain totals Friday could be 1/2″ or more.
After the rain comes another cool-down for the weekend. The Autumnal Equinox occurs at 10:49 am Saturday and our weather will be appropriate. There could be an early shower in Central Indiana, then the rest of the weekend will be dry and cool. If you’re heading to Northern Indiana, some instability showers will be possible, especially on Saturday.
September 20 marks the 10th anniversary of the tornado outbreak that hit the south and east Indy Metro including winds of at least 160 mph in Martinsville and Greenwood. More on the tornado outbreak here: http://www.crh.noaa.gov/ind/?n=sept20_2002tor