Heavy rain, cool temperatures Wednesday

Driving could be hazardous in the metro-east Wednesday with periods of heavy rain expected throughout the day.

The most heavily concentrated rain is likely to occur before 10 a.m, according to the National Weather Service. After that, thunderstorms will become more scattered.

The high will be 79, nine degrees cooler than the average high temperature of 88 for Aug. 5 in the St. Louis metropolitan area. A week ago today, the temperature reached 100.

The chance of rain will be 80 percent Wednesday night when the low will drop to 70.

Thursday looks like it will be a nicer day.

Partly sunny skies are expected with a high of 83. Some clouds will mover into the area Thursday night with a low of 68.

It will start to warm back up Friday when the high will be 88 with a 20 percent chance of thunderstorms. Otherwise, skies will be partly sunny.

It will be partly cloudy Friday night with a low of 70.

The extended forecast calls for a 30 percent chance of rain both Saturday and Sunday with highs both days in the upper 80s.

Click here to see the detailed local forecast.

This story was originally published August 5, 2015 at 6:59 AM with the headline "Heavy rain, cool temperatures Wednesday."