Hail in Casper · Sep 13, 2026
The estimated-size surface reached 0.5" aloft; NEXRAD logged no point detections over Casper that day. Open it on the live map to see the swath over the streets.
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Convective day · Sep 13, 2026 · noon–noon UTC
Severity
The 7th most severe storm Casper 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
- 0 /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 Casper 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.
Estimated size field 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 13, 2026 — this storm produced no NEXRAD point detections over Casper, so there is one map to show, not two.
The storm in context
Where Sep 13, 2026 sits in Casper's hail record.
This was Casper's 7th recorded hail day, arriving 28 days after the Aug 16, 2026 storm. By severity it ranks 7th of the 7 storms we have logged here. Radar put the day's largest stone over Casper at 0.5" — radar-estimated size aloft.
The Sep 13, 2026 convective day was bigger than Casper: the same system put hail over 171 other tracked cities, 2 of them in Wyoming. Nearest: Wheatland (101 miles southeast, up to 0.5"); Guernsey (107 miles southeast, up to 0.5"); Custer (153 miles northeast, up to 0.5").
These maps are stills. In the app this date is one of 7 Casper 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 Casper. 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 Casper 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
Casper hail history
Other storms in Casper.
Estimated-size surface Aug 16, 2026
0.75"
Estimated-size surface Aug 15, 2026
0.75"
Estimated-size surface Jul 9, 2026
1.75"
Estimated-size surface Jul 7, 2026
1.25"
Estimated-size surface Jul 6, 2026
1.25"
Estimated-size surface Jun 25, 2026
0.5"Take your next area into the field.
See the hail, review your recommendations, and canvass with Overview on iPhone.
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