Hail in La Crosse · Aug 21, 2026
The estimated-size surface reached 0.5" aloft; NEXRAD logged no point detections over La Crosse that day. Open it on the live map to see the swath over the streets.
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Convective day · Aug 21, 2026 · noon–noon UTC
Severity
The 12th most severe storm La Crosse 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
- 31 /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 La Crosse 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 Aug 21, 2026 — this storm produced no NEXRAD point detections over La Crosse, so there is one map to show, not two.
The storm in context
Where Aug 21, 2026 sits in La Crosse's hail record.
This was La Crosse's 12th recorded hail day, arriving 8 days after the Aug 13, 2026 storm. By severity it ranks 12th of the 13 storms we have logged here. Radar put the day's largest stone over La Crosse at 0.5" — radar-estimated size aloft.
The Aug 21, 2026 convective day was bigger than La Crosse: the same system put hail over 659 other tracked cities, 30 of them in Kansas. Nearest: Nekoma (15 miles south, up to 0.5"); Dorrance (38 miles east, up to 0.5"); Ellinwood (45 miles east, up to 0.5").
These maps are stills. In the app this date is one of 13 La Crosse 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.
For this storm over La Crosse, the NWS report log is empty — a common outcome, since ground reports only happen when someone witnesses the hail and takes the time to call it in. The detection record for the date lives in the radar maps above.
Below the severe threshold
What 0.5" hail means for La Crosse 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
$432K
Potential roof exposure — 36 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
Claim window
August 2028
Claims from this storm can typically be filed until around August 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 $8 on top of the $150 plan.
La Crosse hail history
Other storms in La Crosse.
Estimated-size surface Sep 5, 2026
1"
Estimated-size surface Aug 13, 2026
1"
Estimated-size surface Jul 3, 2026
NEXRAD surface Jul 1, 2026
0.75"
Estimated-size surface Jun 15, 2026
0.75"
Estimated-size surface Jun 1, 2026
1"
Estimated-size surface May 30, 2026
1.75"
Estimated-size surface May 17, 2026
4"
Estimated-size surface Apr 26, 2026
1.5"
Estimated-size surface Apr 25, 2026
4"
Estimated-size surface Apr 9, 2026
0.5"
Estimated-size surface Apr 8, 2026
0.5"Take your next area into the field.
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