(9:00PM – Monday, March 30th, 2026) Continued severe t’storm threat thru Tuesday night…
⚠️Update…
•With this update, we have slightly expanded the coverage of level 1 and 2 severe t’storm probabilities across Northern Illinois for tonight/early Tuesday morning.
•With this updated, little in the way of changes were needed on the Tuesday morning-early Wednesday morning forecast.
⏰📍Timing & Location…
•Tonight – Early Tuesday Morning, March 30-31st: Northern Illinois.
•Tuesday Morning – Early Wednesday Morning, March 31-April 1st: Northern & Central Illinois.
⚡️Hazards…
•A level 1 to 2 severe t’storm threat is in place across Northern Illinois from tonight through early Tuesday morning, for the threat of isolated to widely scattered severe t’storms. Large hail and damaging winds will be the threats with activity. Some significant severe t’storms will be possible, capable of producing very large hail (2.00″+) and/or significant damaging winds (75MPH+).
•A level 1 severe t’storm threat is in place across much of Northern and Central Illinois from Tuesday morning through early Wednesday morning, for the threat of isolated severe t’storms. Large hail and damaging winds will be the main threats.
✔️Summary…
•As a lead disturbance moves through the region, isolated to scattered showers and t’storms have developed across Iowa and Northern Illinois this evening. This activity will continue to traverse Northern Illinois from tonight on into early Tuesday morning. Some severe t’storm threat will be possible with this activity.
•Some lingering shower and t’storm activity may be ongoing across portions of Northern and Central Illinois on Tuesday morning, residual activity from overnight. Some of this activity may regenerate during on Tuesday afternoon, with additional scattered showers and t’storms expected develop as well on Tuesday afternoon across portions of Northern and Central Illinois, along and in the vicinity of an advancing cold front. This activity, along with further development to the southwest, will then track across much of Northern and Central Illinois from Tuesday afternoon through early Wednesday morning. Some severe t’storm threat will be likely with this activity.
