National Weather Service United States Department of Commerce

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Widespread rain and storms north of U.S. Hwy 34 will gradually decrease in intensity and become more scattered through Noon. Some of the rain will be heavy for brief periods (0.5”+/hour rates) and reduce visibility and lead to ponding water on roads.
A Flood Watch is in effect for portions of eastern Iowa and northwest Illinois until 7 AM Sunday, with the potential to be expanded into Sunday. Heavy rain is expected with accumulations of 1-3” and locally higher amounts of 3-5” possible. Urban areas, poor drainage locations, and areas with recent heavy rain are at greatest risk for flash flooding.
Multiple rounds of heavy rain producing storms will lead to a Slight to Moderate risk (level 2 to 3 out of 4) for excessive rainfall and flash flooding through tonight, especially north of Highway 34.
Here's a look at the rain chances through Sunday night. Overall, we'll see continued rounds of showers and storms. Widespread coverage with heavy rainfall is expected this morning north of Highway 34. Storms will become more scattered later today before turning widespread with heavy rain again tonight into Sunday. Chances for rain/showers remain high Sunday night and Monday, but heavy rain is unlikely.
With heavy rainfall expected at times into Sunday, here are some tips for safe driving in the heavy rain. Make sure to slow down, increase following distance, and turn on your low-beam headlights to improve visibility. Stay alert! Stay safe!