Wind gust 64 mph
3 NW Parnell Iowa County
“(DVN)”
— NOAA / SPC storm report
Hail in Williamsburg Apr 2, 2026
Both radar surfaces caught this storm: NEXRAD logged 5 hail signatures up to 0.75", and the radar-estimated size reached 0" aloft.
Largest hailstone
0.75"
≈ penny to nickel · the largest NEXRAD radar signature Homes in the hail footprint
305
Ground reports
1
1 windThe 4th most severe storm Williamsburg has seen in the last 12 months
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
2.6 /10
- Hail size
- 19 /100
- Homes exposed
- 50 /100
- Ground truth
- 17 /100
Largest hailstone — the top predictor of roof damage.
How many homes sit inside the storm's footprint.
Independent storm reports filed with the NWS.
How Williamsburg saw the hail — from two instruments
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
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
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"
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 4th of the 8 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 (12 miles southwest, up to 0.75"); Wellman (15 miles south, up to 2.75"); Kalona (21 miles southeast, up to 2.75").
These maps are stills from Williamsburg's Apr 2, 2026 storm. In the Overview app the same surfaces are live — radar updating in real time, radar-estimated hail size as it forms, and NWS spotter reports pinned where they're filed — with a radar replay you can scrub back over any past day.
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.
Wind reports
1 report
Storm forensics
Read from the arrival times and locations of the NOAA ground reports,
not a radar-measured storm track.
How the storm moved
Reports came from Parnell — beyond Williamsburg itself.
What 0.75" hail means for Williamsburg roofs
Hail this size sits right at the edge of the National Weather Service severe threshold. Newer roofs usually shrug it off, but aging or already-worn shingles can bruise, and soft metals — vents, flashing, gutters — often show the first dents.
What this storm is worth to a roofer
$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
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.
Track hail over Williamsburg on the live map
Radar updates in real time, spotter reports appear on the map as they're filed, and the full Williamsburg storm history — this Apr 2, 2026 storm included — sits underneath. When you're ready, draw this storm's footprint and pull highly accurate homeowner contact information for every address inside it.
Highly accurate contact information starting at $0.23 per address — every contact included. Digital leads cost $15–$40. Start with a 7-day free trial — no credit card required. See pricing
Williamsburg hail history
← All hail in Williamsburg 8 recorded storm days in Williamsburg, IA
Other storms in Williamsburg
Jul 3, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed 
Jun 16, 2026
0.5" Estimated 0.5"
No ground reports filed 
Jun 13, 2026
1" Estimated 1"
No ground reports filed 
Jun 11, 2026
0.5" Estimated 0.5"
No ground reports filed 
Apr 23, 2026
1" Signatures 1"
No ground reports filed 
Apr 17, 2026
1.25" Signatures 1.25" Estimated 0.5"
No ground reports filed 
Mar 30, 2026
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 surfaces are detections and estimates,
not confirmed damage. Last updated Aug 3, 2026.