How Much Rain Could Isaac Bring?

If Hurricane Isaac stays on its forecasted path, the Stateline could see some showers and storms from Isaac's remnants this weekend. This wouldn't be the first time the remnants of a tropical storm has hit the Stateline, but it begs the question: How much rain could we see?

Here's a map showing all the tropical systems that have hit the Stateline since the late 1800s. There are 17 storms on record, but only 14 have actual rain data to go along with it.

If you look at past history, we have a good chance of seeing decent accumulations over the weekend. The average rainfall of the 14 storms we have data on comes out to just over an inch of rain per system. We were especially busy in 2008 when the remnants of two storms (Gustav and Ike) dropped close to five inches of rain on Rockford in just under a month.Chicago saw ELEVEN inches of rain from those two storms.

The current forecast isn't nearly as ambitious, but still shows decent rainfall (Up to 0.50") between Friday night and Sunday from Isaac. Since the forecast path of Isaac is constantly changing, any movement in the storm could affect our forecast greatly, especially in the rain department. Stay tuned for more updates!