Wind gust 64 mph
3 NW Parnell Iowa County
“(DVN)”
— NOAA / SPC storm report
/ Storm field report · Iowa
Hail in Williamsburg · Apr 2, 2026
NEXRAD logged 5 hail signatures up to 0.75"; the estimated-size surface reached 0" aloft. Open it on the live map to see the swath over the streets.
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Peak hail signal 0.75" ≈ penny to nickel · the largest NEXRAD radar signature
Homes in the hail footprint 305
Ground reports 1 1 wind
Radar surfaces 2 NEXRAD + estimated size
Convective day · Apr 2, 2026 · noon–noon UTC
Severity
The 5th most severe storm Williamsburg has seen in the last 12 months
Composite score · 2.6 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
2.6 /10
- Peak hail signal
- 19 /100
- Homes exposed
- 50 /100
- Ground truth
- 17 /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 Williamsburg saw the hail — from two instruments
Apr 2, 2026 · Williamsburg, IA
Each storm gets two readings: the radar signatures NEXRAD recorded as the cells passed overhead, and a modeled estimate of hail size in the air. They are independent surfaces, so a mismatch between them is expected — and worth reading.
NEXRAD radar signatures Surface resolved
Radar signature field The point detections NEXRAD recorded overhead. Each signature marks where the radar saw hail aloft — it is a detection, not a stone measured on the ground.
Max size
0.75"
Detections
5
Radar-estimated hail size Surface resolved
Estimated size field Radar-estimated hail size over the swath. The model reports the biggest stone the storm could sustain in the air; what actually fell may have been smaller.
Max size
0"
The storm in context
Where Apr 2, 2026 sits in Williamsburg's hail record.
This was Williamsburg's 2nd recorded hail day, arriving 3 days after the Mar 30, 2026 storm. By severity it ranks 5th of the 9 storms we have logged here. Radar put the day's largest stone over Williamsburg at 0.75" — the largest NEXRAD radar signature.
The Apr 2, 2026 convective day was bigger than Williamsburg: the same system put hail over 160 other tracked cities, 46 of them in Iowa. Nearest: North English (7 miles south, up to 0.75"); Wellman (12 miles southeast, up to 2.75"); Keota (17 miles southeast, up to 2.5").
These maps are stills. In the app this date is one of 9 Williamsburg 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
1 report filed with the NWS
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.
Wind reports
1 reportStorm forensics
How the storm moved
Timing and place names from NOAA ground reports
Read from the arrival times and locations of the NOAA ground reports, not a radar-measured storm track.
Reports came from Parnell — beyond Williamsburg itself.
Near the severe threshold
What 0.75" hail means for Williamsburg 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.
305 homes × $12,000 avg. claim
Potential roof exposure
$3.7M
Potential roof exposure — 305 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 2 jobs
- Illustrative work
- ~$30K
Close just 0.5% of the 305 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
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 $64 on top of the $150 plan.
Williamsburg hail history
Other storms in Williamsburg.
9 recorded storm days in Williamsburg, IA
Estimated-size surface Storm date Williamsburg / IA
Aug 7, 2026
3" Estimated 3"
1 ground report Open report →
Estimated-size surface Storm date Williamsburg / IA
Jul 3, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Williamsburg / IA
Jun 16, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Williamsburg / IA
Jun 13, 2026
1" Estimated 1"
No ground reports filed Open report →
Estimated-size surface Storm date Williamsburg / IA
Jun 11, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Williamsburg / IA
Apr 23, 2026
1" Signatures 1"
No ground reports filed Open report →
Estimated-size surface Storm date Williamsburg / IA
Apr 17, 2026
1.25" Signatures 1.25" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Williamsburg / IA
Mar 30, 2026
No ground reports filed Open report →
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A storm day here is a convective day — it runs from noon to noon
UTC, so late-night hail is grouped with the afternoon storm that
spawned it rather than split across two calendar dates. Ground
reports are public-domain observations from the NOAA Storm
Prediction Center. Radar tells you where to look. Only an inspection confirms damage at an address. Last updated Aug 8, 2026.