March 10th, 2026 Severe Threat

[frostfern]

Copious small hail (covering the ground up to 1”) and major flash flooding in downtown Grand Rapids.  This elevated supercell also produced the biggest gravity wave signature I have ever seen on radar.  Too bad it was dark.

[TheNiño]

41 minutes ago, MidwestChaser said:

PRELIMINARY LOCAL STORM REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
1135 PM CDT TUE MAR 10 2026  
   
.TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON  
   
.DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE.  
  
            ..REMARKS..  
  
0630 PM     HAIL             1 SE KANKAKEE           41.11N 87.84W  
03/10/2026  E6.00 INCH       KANKAKEE           IL   PUBLIC             
  
            PHOTO SHOWS HAILSTONE APPROXIMATELY 6 INCHES   
            IN DIAMETER IN SOUTHEASTERN KANKAKEE. TIME   
            ESTIMATED BY RADAR.   
  

Wouldn’t this be the largest hailstone ever recorded in Illinois by over an inch?? Correct me if I’m wrong.

[RCNYILWX]

Wouldn’t this be the largest hailstone ever recorded in Illinois by over an inch?? Correct me if I’m wrong.

Yes, the current record is Minooka, IL on June 10, 2015 at 4.75". I actually happened to be the warning operator that day and took part in the committee with LOT, NCEI, MRCC, and the IL state climatologist to confirm the record.

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[TheNiño]

3 minutes ago, RCNYILWX said:

Yes, the current record is Minooka, IL on June 10, 2015 at 4.75". I actually happened to be the warning operator that day and took part in the committee with LOT, NCEI, MRCC, and the IL state climatologist to confirm the record.

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Pretty cool. Sorry you no longer hold the record (I know this one isn’t confirmed yet), but let’s hope this one doesn’t get beat. Good grief I can’t imagine the noise and damage 6in hail would do. Feel bad for any people or animals that had to endure that.

[RCNYILWX]

Pretty cool. Sorry you no longer hold the record (I know this one isn’t confirmed yet), but let’s hope this one doesn’t get beat. Good grief I can’t imagine the noise and damage 6in hail would do. Feel bad for any people or animals that had to endure that.

What's crazy is that we already had a 5" candidate that would also break the record and then got the 6" report. That's one of the most intense thunderstorms on record in IL. Twice setting new state hail records (likely) with a significant tornado just south of the giant hail. Plains type stuff. Definitely feel for everyone affected down there.

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