Hail in Collinsville · Sep 20, 2026
The estimated-size surface reached 0.5" aloft; NEXRAD logged no point detections over Collinsville that day. Open it on the live map to see the swath over the streets.
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Convective day · Sep 20, 2026 · noon–noon UTC
Severity
The 10th most severe storm Collinsville has seen in the last 12 months
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
- Peak hail signal
- 13 /100
- Homes exposed
- 26 /100
- Ground truth
- 0 /100
Largest radar-indicated size — a signal of damage potential, not confirmation.
How many homes sit inside the storm's footprint.
Independent storm reports filed with the NWS.
Evidence / storm surfaces
How Collinsville saw the hail — from two instruments
The maps here read the same storm from two angles — point detections from NEXRAD, and modeled hail size aloft. Where the two disagree is informative: it marks where estimated size outran the signatures, or trailed them.
The modeled maximum hail size across the swath, derived from radar aloft — the largest stone the storm could have supported, which is not necessarily what reached the ground.
Only the radar-estimated size surface resolved for Sep 20, 2026 — this storm produced no NEXRAD point detections over Collinsville, so there is one map to show, not two.
The storm in context
Where Sep 20, 2026 sits in Collinsville's hail record.
This was Collinsville's 11th recorded hail day, arriving 7 days after the Sep 13, 2026 storm. By severity it ranks 10th of the 11 storms we have logged here. Radar put the day's largest stone over Collinsville at 0.5" — radar-estimated size aloft.
The Sep 20, 2026 convective day was bigger than Collinsville: the same system put hail over 253 other tracked cities, 1 of them in Mississippi. Nearest: Philadelphia (22 miles northwest, up to 0.5"); Sweet Water (72 miles southeast, up to 0.5"); Moundville (82 miles east, up to 0.5").
These maps are stills. In the app this date is one of 11 Collinsville storm dates on a live map — both surfaces, the reports, and a replay — and the same map is where you draw the swath. This page rebuilds nightly.
Ground reports
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.
No ground reports were filed with the National Weather Service for this storm over Collinsville. That is common: a report depends on someone being there to see it and take the time to call it in. The radar surfaces above are the record here — the storm was detected from above even though no one on the ground logged it.
Below the severe threshold
What 0.5" hail means for Collinsville roofs.
Radar signals under three-quarters of an inch stay below the National Weather Service severe threshold and generally indicate lower roof risk. Older or already-worn materials can still show effects, but radar alone cannot determine whether a specific roof was damaged.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
Potential roof exposure
$228K
Potential roof exposure — 19 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
Claim window
September 2028
Claims from this storm can typically be filed until around September 2028 — the window to reach these homeowners while it's still open. Deadlines vary by policy and state.
Names and phones for every home in the footprint: at most $4 on top of the $150 plan.
Collinsville hail history
Other storms in Collinsville.
Estimated-size surface Sep 13, 2026
0.5"
Estimated-size surface Aug 26, 2026
0.75"
Estimated-size surface Jul 8, 2026
1"
Estimated-size surface Jul 5, 2026
1.25"
Estimated-size surface Jul 1, 2026
0.75"
Estimated-size surface May 6, 2026
4"
Estimated-size surface Apr 29, 2026
1.5"
Estimated-size surface Apr 28, 2026
1.25"
Estimated-size surface Apr 1, 2026
1.75"
Estimated-size surface Mar 7, 2026
0.75"The next storm won’t wait for you.
Set your territory and alerts today. When hail hits, use Overview to choose your streets and get moving.
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