Grundy County Hail Map & Storm Reports
Hail, wind, and tornado reports from official NOAA sources (NWS & SPC) · Last 12 months · Updated Sep 14, 2026
Grundy County, Illinois has recorded tornado activity: official National Weather Service (NWS) and Storm Prediction Center (SPC) records list 2 tornado reports among 44 severe weather events here in the last 12 months, alongside 2 hail reports with hail up to 1.5" and 40 high-wind reports with gusts up to 70 mph. The most recent recorded storm activity was on Aug 12, 2026. This page updates daily: every event comes straight from official NOAA data — no estimates, no modeling, just the record.
Grundy County hail map
Where hail and high-wind reports clustered across Grundy County over the last 12 months. Heat shows report density and significance, not radar.
What the radar showed
Hail history for an address in Grundy County
See address-level storm exposure — verified hail and wind reports plus official warning boundaries around any specific property, including the most recent 30 days. Free account, takes under a minute.
Check an address free →Storm log — the official record, day by day
Events older than 30 days, as recorded by the National Weather Service and Storm Prediction Center. Excerpts are quoted directly from official warnings and verified reports.
Wednesday, August 12, 2026
2 SPC verified storm reports — wind gusts up to 65 mph
“Ambient weather station measured a peak wind gust of 65 mph. (LOT)”
“Report shared via social media of small and medium tree limbs downed around Coal City. Time estimated by radar. (LOT)”
- Wind 65 mph 4 SE Seneca SPC verified report
- Wind Unknown Coal City SPC verified report
Tuesday, August 11, 2026
5 SPC verified storm reports — wind gusts up to 70 mph, 2 tornado reports
“An NWS storm survey confirmed that an EF-0 tornado with estimated peak winds of 80 mph... a path length of 2.2 miles... and a peak width of 150 yards occurred on the no (LOT)”
“An NWS storm survey confirmed that an EF-0 tornado with estimated peak winds of 80 mph... a path length of 1.6 miles... and a peak width of 250 yards occurred in Norman (LOT)”
- Tornado Tornado 3 N Morris SPC verified report
- Tornado Tornado 5 E Seneca SPC verified report
- Wind 70 mph Coal City SPC verified report
- Wind 65 mph 2 NNW Mazon SPC verified report
- Wind Unknown 2 NNE Morris SPC verified report
Monday, July 27, 2026
2 SPC verified storm reports — hail up to 1.5"
“Public report of ping pong ball size hail near Range Road and Brannick Road. (LOT)”
“Relayed via mping. Time estimated by radar. (LOT)”
- Hail 1.5" 1 SW Minooka SPC verified report
- Hail 1" 1 S Carbon Hill SPC verified report
Thursday, June 11, 2026
1 NWS warning — wind gusts up to 60 mph
“WHAT...A brief period of damaging winds up to 60 mph. WHERE...Central Cook, DuPage, Grundy, Kane, Kendall, Northern Cook, Northern Will, Southern Cook, and Southern Will Counties. WHEN...Until 4 PM CDT this afternoon. IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles.”
- Wind 60 mph Grundy County NWS severe weather mention
Wednesday, June 10, 2026
4 SPC verified storm reports — wind gusts up to 64 mph
“Peak gust measured on personal weather station. (LOT)”
“Photo via social media of a large branch snapped off a tree. Time estimated by radar. (LOT)”
- Wind 64 mph Carbon Hill SPC verified report
- Wind Unknown Diamond SPC verified report
- Wind Unknown 4 S Lisbon SPC verified report
- Wind Unknown 5 SW Morris SPC verified report
Tuesday, June 9, 2026
1 SPC verified storm report
“Photo shared to social media shows damaged small farm outbuilding and large branches broken just north of Morris Airport. Time estimated by radar. (LOT)”
- Wind Unknown 4 SE Lisbon SPC verified report
Sunday, May 3, 2026
1 SPC verified storm report — wind gusts up to 59 mph
“Measured on a Davis personal weather station. (LOT)”
- Wind 59 mph 2 N Mazon SPC verified report
Monday, April 27, 2026
2 NWS warnings — wind gusts up to 60 mph
“WHAT...Southeast winds 20 to 25 mph with gusts up to 50 mph expected. WHERE...Portions of north central and northeast Illinois and northwest Indiana. WHEN...Until 4 PM CDT this afternoon. IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. ADDITIONAL DETAILS...The potential exists for brief localized gusts up to 55 to 60 mph.”
“WHAT...Southeast to south winds 20 to 25 mph with gusts up to 50 mph. WHERE...Portions of north central and northeast Illinois and northwest Indiana. WHEN...Until 4 PM CDT this afternoon. IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.”
- Wind 60 mph Grundy County NWS severe weather mention
- Wind 50 mph Grundy County NWS severe weather mention
Sunday, April 12, 2026
1 NWS warning — wind gusts up to 50 mph
“Southwesterly winds may briefly and sporadically gust 40 to 50 mph through about 1 AM. If traveling on east-west oriented roads, be prepared for gusty crosswinds, particularly in higher profile vehicles.”
- Wind 50 mph Grundy County NWS severe weather mention
Sunday, March 15, 2026
2 NWS warnings — wind gusts up to 50 mph
“WHAT...South winds 20 to 30 mph with gusts up to 50 mph expected. WHERE...Livingston, La Salle, Eastern Will, Grundy, Northern Will, Southern Cook, and Southern Will Counties. WHEN...Until 9 PM CDT this evening. IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.”
“WHAT...Sustained southerly winds to 25 mph with gusts up to 50 mph expected. WHERE...La Salle, Grundy, Northern Will, Southern Cook, and Southern Will Counties. WHEN...From 10 AM this morning to 9 PM CDT this evening. IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.”
- Wind 50 mph Grundy County NWS severe weather mention
- Wind 50 mph Grundy County NWS severe weather mention
Friday, March 13, 2026
3 NWS warnings — wind gusts up to 60 mph
“WHAT...West winds 30 to 35 mph with gusts up to 60 mph occurring. WHERE...Portions of north central and northeast Illinois and northwest Indiana. WHEN...Until 4 PM CDT this afternoon. IMPACTS...Damaging winds may blow down tree limbs and power lines. Power outages are possible. Travel will be difficult, especially for high profile vehicles.”
“WHAT...West winds 30 to 35 mph with gusts up to 60 mph expected. WHERE...Portions of north central and northeast Illinois and northwest Indiana. WHEN...Until 4 PM CDT this afternoon. IMPACTS...Damaging winds may blow down tree limbs and power lines. Power outages are possible. Travel will be difficult, especially for high profile vehicles.”
- Wind 60 mph Grundy County NWS severe weather mention
- Wind 60 mph Grundy County NWS severe weather mention
- Wind 50 mph Grundy County NWS severe weather mention
Thursday, March 12, 2026
3 NWS warnings — wind gusts up to 60 mph
“WHAT...West winds 30 to 35 mph with gusts up to 60 mph expected. WHERE...Portions of north central and northeast Illinois and northwest Indiana. WHEN...From 1 AM to 4 PM CDT Friday. IMPACTS...Damaging winds can blow down tree limbs and power lines. Power outages are possible. Travel will be difficult, especially for high profile vehicles.”
“WHAT...West winds 30 to 35 mph with gusts up to 60 mph expected. WHERE...Boone, De Kalb, La Salle, Lee, Ogle, Winnebago, and Grundy Counties. WHEN...From 1 AM to 4 PM CDT Friday. IMPACTS...Damaging winds can blow down tree limbs and power lines. Power outages are possible. Travel will be difficult, especially for high profile vehicles.”
- Wind 60 mph Grundy County NWS severe weather mention
- Wind 60 mph Grundy County NWS severe weather mention
- Wind 50 mph Grundy County NWS severe weather mention
Wednesday, February 18, 2026
1 NWS warning — wind gusts up to 50 mph
“...RED FLAG WARNING EXPANDED TO INCLUDE CHICAGO METRO... Conditions will turn very dry and windy this afternoon, making conditions supportive of brush fire spread. Even with rainfall last night generally 0.05 to 0.15 of an inch across northeastern Illinois, the combination of warm, dry, and windy conditions will cause fine fuels to dry out by early afternoon.”
- Wind 50 mph Grundy County NWS severe weather mention
Monday, December 29, 2025
1 NWS warning — wind gusts up to 55 mph
“WHAT...West winds 25 to 35 mph with gusts of 45 to 55 mph early this morning, easing to occasional gusts to around 45 mph by mid morning. WHERE...Northern and central Illinois and extreme northwest Indiana WHEN...Until noon CST today. IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.”
- Wind 55 mph Grundy County NWS severe weather mention
Sunday, December 28, 2025
4 NWS warnings — wind gusts up to 55 mph
“WHAT...West winds 25 to 35 mph with gusts of 45 to 55 mph expected. WHERE...Portions of central, east central, north central, and northeast Illinois and northwest Indiana. WHEN...Until 3 PM CST /4 PM EST/ Monday. IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.”
“WHAT...West winds 25 to 35 mph with gusts of 45 to 55 mph expected. WHERE...Portions of central, east central, north central, and northeast Illinois and northwest Indiana. WHEN...From 6 PM CST /7 PM EST/ this evening to 3 PM CST /4 PM EST/ Monday. IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.”
- Wind 55 mph Grundy County NWS severe weather mention
- Wind 55 mph Grundy County NWS severe weather mention
- Wind 55 mph Grundy County NWS severe weather mention
- Wind 50 mph Grundy County NWS severe weather mention
Saturday, December 27, 2025
2 NWS warnings — wind gusts up to 55 mph
“WHAT...West winds 25 to 35 mph with gusts up to 50 mph expected. A few gusts to 55 mph possible. WHERE...Portions of central, east central, north central, and northeast Illinois and northwest Indiana. WHEN...From 6 PM CST /7 PM EST/ Sunday to 6 PM CST /7 PM EST/ Monday. IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.”
“WHAT...West winds 25 to 35 mph with gusts up to 50 mph expected. A few gusts to 55 mph possible. WHERE...Portions of central, east central, north central, and northeast Illinois and northwest Indiana. WHEN...From 6 PM CST /7 PM EST/ Sunday to 6 PM CST /7 PM EST/ Monday. IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.”
- Wind 55 mph Grundy County NWS severe weather mention
- Wind 55 mph Grundy County NWS severe weather mention
Wednesday, November 26, 2025
2 NWS warnings — wind gusts up to 60 mph
“WHAT...West winds 25 to 35 mph with gusts up to 50 mph expected. WHERE...Portions of central, east central, north central, and northeast Illinois and northwest Indiana. WHEN...Until 9 PM CST /10 PM EST/ this evening. IMPACTS...Gusty winds will blow around unsecured objects, including holiday decorations. Tree limbs could be blown down and a few power outages may result.”
“WHAT...West winds 20 to 30 mph with gusts up to 50 to 55 mph occurring. WHERE...Portions of central, east central, north central, and northeast Illinois and northwest Indiana. WHEN...Until 9 PM CST /10 PM EST/ this evening. IMPACTS...Gusty winds will blow around unsecured objects including holiday decorations. Tree limbs could be blown down and a few power outages may result.”
- Wind 60 mph Grundy County NWS severe weather mention
- Wind 55 mph Grundy County NWS severe weather mention
Tuesday, November 25, 2025
7 NWS warnings — wind gusts up to 60 mph
“WHAT...West winds 25 to 35 mph with gusts up to 50 mph expected. WHERE...Portions of central, east central, north central, and northeast Illinois and northwest Indiana. WHEN...From 3 AM CST /4 AM EST/ to 9 PM CST /10 PM EST/ Wednesday. IMPACTS...Gusty winds will blow around unsecured objects, including holiday decorations. Tree limbs could be blown down and a few power outages may result.”
“WHAT...West winds 25 to 35 mph with gusts up to 50 mph expected. WHERE...Portions of central, east central, north central, and northeast Illinois and northwest Indiana. WHEN...From 3 AM CST /4 AM EST/ to 9 PM CST /10 PM EST/ Wednesday. IMPACTS...Gusty winds will blow around unsecured objects, including holiday decorations. Tree limbs could be blown down and a few power outages may result.”
- Wind 60 mph Grundy County NWS severe weather mention
- Wind 60 mph Grundy County NWS severe weather mention
- Wind 60 mph Grundy County NWS severe weather mention
- Wind 60 mph Grundy County NWS severe weather mention
- Wind 60 mph Grundy County NWS severe weather mention
- Wind 60 mph Grundy County NWS severe weather mention
- Wind 60 mph Grundy County NWS severe weather mention
Today's severe weather outlook
Common questions
When was the last severe storm in Grundy County, IL?
The most recent recorded event was on Aug 12, 2026. Official NWS and SPC records show 44 severe weather events in Grundy County over the last 12 months. Exact dates and locations for recent storms are available in the app with a free account.
Did it hail in Grundy County recently?
Yes — 2 hail reports in the last 12 months, with hail up to 1.5" recorded. The hail map above shows where reports clustered; the storm log lists each day.
How do I see hail history for a specific address in Grundy County?
Create a free IDOLCheck account and run an address check. It shows verified storm reports and official NWS warning boundaries around any specific property, including the most recent 30 days — county-level pages like this one only tell part of the story.