Tornado Rating unknown
5 ESE Dix Jefferson County
“Tornado reported near Tolle Lane and Austin Road per Fire Department. (PAH)”
— NOAA / SPC storm report
Hail in Mount Vernon Jun 21, 2026
Hit 43 days agoThe radar-estimated size surface caught this storm, reaching 0.75" aloft. NEXRAD logged no point detections over Mount Vernon this day.
A tornado was also reported to the National Weather Service during this storm — see the ground reports below.
Largest hailstone
0.75"
≈ penny to nickel · radar-estimated size aloft Homes in the hail footprint
1,234
Ground reports
3
3 tornadoThe 3rd most severe storm Mount Vernon has seen in the last 12 months
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
4.2 /10
- Hail size
- 19 /100
- Homes exposed
- 62 /100
- Ground truth
- 100 /100
Largest hailstone — the top predictor of roof damage.
How many homes sit inside the storm's footprint.
Independent storm reports filed with the NWS.
How Mount Vernon saw the hail — from two instruments
We map this storm two ways: the NEXRAD radar signatures the storm produced overhead, and the radar-estimated size of the hail in the air. The two surfaces don’t have to match — where they diverge is where estimated size aloft ran ahead of, or behind, what the signatures caught.
Radar-estimated hail size
Maximum hail size as estimated from radar aloft. Treat it as the storm's ceiling — the largest supportable stone — rather than a ground measurement.
Max size
0.75"
Only the radar-estimated size surface resolved for Jun 21, 2026 — this storm produced no NEXRAD point detections over Mount Vernon, so there is one map to show, not two.
Where Jun 21, 2026 sits in Mount Vernon's hail record
This was Mount Vernon's 4th recorded hail day, arriving 36 days after the May 16, 2026 storm. By severity it ranks 3rd of the 6 storms we have logged here. Radar put the day's largest stone over Mount Vernon at 0.75" — radar-estimated size aloft.
The Jun 21, 2026 convective day was bigger than Mount Vernon: the same system put hail over 415 other tracked cities, 27 of them in Illinois. Nearest: Iuka (13 miles northeast, up to 1"); Bluford (14 miles east, up to 1.25"); Sandoval (15 miles north, up to 0.75").
These maps are stills from Mount Vernon's Jun 21, 2026 storm. In the Overview app the same surfaces are live — radar updating in real time, radar-estimated hail size as it forms, and NWS spotter reports pinned where they're filed — with a radar replay you can scrub back over any past day.
What people on the ground reported
These are storm reports filed with the National Weather Service and released through the NOAA Storm Prediction Center — public-domain observations from spotters, the public, and NWS surveys. We quote each one exactly as filed.
Tornado reports
3 reports Tornado Rating unknown
2 SSE Dix Jefferson County
“*** 2 FATAL... 5 INJ *** EF3 Tornado. Peak winds 140 mph. Track 13.8 miles. Several mobile homes destroyed. Severe tree damage... power poles snapped. (PAH)”
— NOAA / SPC storm report
Tornado Rating unknown
3 E Dix Jefferson County
“Photo submission of tornado on Facebook by Texico. (PAH)”
— NOAA / SPC storm report
Storm forensics
Read from the arrival times and locations of the NOAA ground reports,
not a radar-measured storm track.
How the storm moved
Reports came from Dix — beyond Mount Vernon itself.
What 0.75" hail means for Mount Vernon roofs
Hail this size sits right at the edge of the National Weather Service severe threshold. Newer roofs usually shrug it off, but aging or already-worn shingles can bruise, and soft metals — vents, flashing, gutters — often show the first dents.
What this storm is worth to a roofer
$15M
Potential roof exposure — 1,234 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
Illustrative jobs
6 jobs
Illustrative work
~$90K
Claims from this storm can typically be filed until around June 2028 — the window to reach these homeowners while it's still open. Deadlines vary by policy and state.
Track hail over Mount Vernon on the live map
Radar updates in real time, spotter reports appear on the map as they're filed, and the full Mount Vernon storm history — this Jun 21, 2026 storm included — sits underneath. When you're ready, draw this storm's footprint and pull highly accurate homeowner contact information for every address inside it.
Highly accurate contact information starting at $0.23 per address — every contact included. Digital leads cost $15–$40. Start with a 7-day free trial — no credit card required. See pricing
Mount Vernon hail history
← All hail in Mount Vernon 6 recorded storm days in Mount Vernon, IL
Other storms in Mount Vernon
Jul 8, 2026
1.25" Signatures 1.25" Estimated 0.5"
No ground reports filed 
Jul 4, 2026
1.25" Signatures 1.25" Estimated 0.5"
No ground reports filed 
May 16, 2026
2.25" Signatures 2.25" Estimated 1.5"
2
ground reports 
Apr 27, 2026
1.75" Signatures 1.75" Estimated 1"
1
ground report 
Jan 8, 2026
1.75" Signatures 1.75"
No ground reports filed
A storm day here is a convective day — it runs from noon to noon
UTC, so late-night hail is grouped with the afternoon storm that
spawned it rather than split across two calendar dates. Ground
reports are public-domain observations from the NOAA Storm
Prediction Center. Radar surfaces are detections and estimates,
not confirmed damage. Last updated Aug 3, 2026.