Hail in Griswold · Apr 9, 2026
NEXRAD logged 2 hail signatures up to 0.75"; the estimated-size surface had no signal that day. Open it on the live map to see the swath over the streets.
7-day free trial in the iPhone app. No card required to start.
For iPhone. Android coming soon.
Web trial: 7 days free. Card required. $150/month after the trial unless cancelled.
Convective day · Apr 9, 2026 · noon–noon UTC
Severity
The 14th most severe storm Griswold 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
- 19 /100
- Homes exposed
- 28 /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 Griswold saw the hail — from two instruments
Two instruments, one storm: NEXRAD logs the point signatures it detected overhead, while the estimated-size surface models how large the hail aloft could have grown. Agreement between them is not guaranteed — the gaps are where the model ran ahead of, or behind, the detections.
Radar signature field NEXRAD's hail signatures for this storm: the spots the radar detected from above. A detection overhead is not the same thing as a confirmed stone below.
Only the NEXRAD radar-signature surface resolved for Apr 9, 2026 — the estimated-size swath had no hail signal to model for this storm, so there is one map to show, not two.
The storm in context
Where Apr 9, 2026 sits in Griswold's hail record.
This was Griswold's 3rd recorded hail day, arriving 34 days after the Mar 6, 2026 storm. By severity it ranks 14th of the 15 storms we have logged here. Radar put the day's largest stone over Griswold at 0.75" — the largest NEXRAD radar signature.
The Apr 9, 2026 convective day was bigger than Griswold: the same system put hail over 161 other tracked cities, 14 of them in Iowa. Nearest: Emerson (10 miles southwest, up to 0"); Hancock (21 miles northwest, up to 0.5"); Villisca (22 miles south, up to 0").
These maps are stills. In the app this date is one of 15 Griswold 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 Griswold, 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.
Near the severe threshold
What 0.75" hail means for Griswold roofs.
A signal this size sits near the National Weather Service severe threshold. Aging shingles and soft metals such as vents, flashing, and gutters may be more vulnerable; roof age, wind, and material condition all matter, and only an inspection can confirm damage.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
Potential roof exposure
$288K
Potential roof exposure — 24 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
Claim window
April 2028
Claims from this storm can typically be filed until around April 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 $5 on top of the $150 plan.
Griswold hail history
Other storms in Griswold.
Sep 14, 2026
0.75"
Estimated-size surface Sep 6, 2026
1"
Estimated-size surface Aug 8, 2026
0.75"
Estimated-size surface Aug 4, 2026
1"
Estimated-size surface Jul 20, 2026
0.75"
Estimated-size surface Jun 6, 2026
2"
Estimated-size surface Jun 5, 2026
1.75"
Estimated-size surface May 31, 2026
1.75"
Estimated-size surface May 18, 2026
1.5"
Estimated-size surface May 17, 2026
1"
Estimated-size surface May 16, 2026
3.5"
Estimated-size surface Apr 23, 2026
1"
Estimated-size surface Mar 6, 2026
1"
Estimated-size surface Mar 5, 2026
1"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.
7-day free trial in the iPhone app. No card required to start.
For iPhone. Android coming soon.
Web trial: 7 days free. Card required. $150/month after the trial unless cancelled.