Hail in Griswold · Aug 8, 2026
NEXRAD logged 0 hail signatures up to 0"; the estimated-size surface reached 0.75" aloft. 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 · Aug 8, 2026 · noon–noon UTC
Severity
The 8th 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
- 63 /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
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 signature field NEXRAD radar signatures — the point detections the storm produced overhead. A signature is where the radar saw hail, not a confirmed stone on the ground.
Estimated size field Maximum hail size as estimated from radar aloft. Treat it as the storm's ceiling — the largest supportable stone — rather than a ground measurement.
The storm in context
Where Aug 8, 2026 sits in Griswold's hail record.
This was Griswold's 13th recorded hail day, arriving 4 days after the Aug 4, 2026 storm. By severity it ranks 8th of the 14 storms we have logged here. Radar put the day's largest stone over Griswold at 0.75" — radar-estimated size aloft.
The Aug 8, 2026 convective day was bigger than Griswold: the same system put hail over 500 other tracked cities, 76 of them in Iowa. Nearest: Lewis (9 miles northwest, up to 0.5"); Wiota (15 miles north, up to 0.5"); Emerson (17 miles southwest, up to 0.5").
These maps are stills. In the app this date is one of 14 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.
Nobody on the ground filed a report over Griswold for this date, which says more about who was watching than about the storm: spotter reports only exist where there is an observer. The radar surfaces above carry the evidence for this one.
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
$17M
Potential roof exposure — 1,441 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 7 jobs
- Illustrative work
- ~$105K
Close just 0.5% of the 1,441 homes in this footprint at the average $15,000 roof job. Illustrative math, not a projection — your results depend on your outreach and how the market responds.
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 $303 on top of the $150 plan.
Griswold hail history
Other storms in Griswold.
Estimated-size surface Sep 6, 2026
1"
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"
NEXRAD surface Apr 9, 2026
0.75"
Estimated-size surface Mar 6, 2026
1"
Estimated-size surface Mar 5, 2026
1"Take your next area into the field.
See the hail, review your recommendations, and canvass with Overview on iPhone.
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.