National Weather Service United States Department of Commerce

Areas of Severe Thunderstorms and Excessive Rainfall; Heat Wave Builds in the Intermountain West and Plains

A slow moving front will bring rounds of strong to severe thunderstorms and heavy rainfall to the central Plains eastward to the east-central U.S.. The first widespread significant heat wave of summer for the Intermountain West and Plains is expected to develop today and expand through next week. Dangerous heat will continue to impact portions of the Southwest and Southeast. Read More >

Scattered showers and thunderstorms will develop this afternoon. Due to the slow movement, heavy rain may result in localized rainfall over 2 inches and flooding. Isolated severe storms with gusty winds to 60 mph will be possible with the strongest storms. Additionally, a few funnel clouds will be possible near I-74, and there is a low threat of a tornado or two mainly south of a Springfield to Effingham line.
Scattered thunderstorms are expected for portions of central IL through Sunday, then dry weather is expected early next week. Storms this evening and Saturday could be severe, mainly for southern portions of the area. Near normal temperatures are expected, with a gradual warming trend. Highs will increase from the mid 80s Saturday to around 90 by midweek. Lows will range from the mid 60s to around 70.
A frontal boundary will stall over portions of southern Illinois today and will be the focus for strong to severe thunderstorms from around 3 to 10 pm today. The main threats will be locally damaging wind gusts and heavy rain, but isolated large hail is possible as well, and a tornado or two can't be ruled out, mainly south of a Jacksonville to Effingham line.