Hail size 1"
1 WNW Green Bay Brown County
“(GRB)”
— NOAA / SPC storm report
/ Storm field report · Brown
Hail in Green Bay · Apr 13, 2026
The estimated-size surface reached 0.5" aloft; NEXRAD logged no point detections over Green Bay that day. Open it on the live map to see the swath over the streets.
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Peak hail signal 0.5" ≈ pea to penny · radar-estimated size aloft
Homes in the hail footprint 10,977
Ground reports 3 3 hail
Radar surfaces 1 Estimated size only
Convective day · Apr 13, 2026 · noon–noon UTC
Severity
The 3rd most severe storm Green Bay has seen in the last 12 months
Composite score · 3.5 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
3.5 /10
- Peak hail signal
- 13 /100
- Homes exposed
- 81 /100
- Ground truth
- 50 /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 Green Bay saw the hail — from two instruments
Apr 13, 2026 · Green Bay, WI
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-estimated hail size Surface resolved
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.
Max size
0.5"
Only the radar-estimated size surface resolved for Apr 13, 2026 — this storm produced no NEXRAD point detections over Green Bay, so there is one map to show, not two.
The storm in context
Where Apr 13, 2026 sits in Green Bay's hail record.
This was Green Bay's 2nd recorded hail day, arriving 14 days after the Mar 30, 2026 storm. By severity it ranks 3rd of the 6 storms we have logged here. Radar put the day's largest stone over Green Bay at 0.5" — radar-estimated size aloft.
The Apr 13, 2026 convective day was bigger than Green Bay: the same system put hail over 467 other tracked cities, 108 of them in Wisconsin. Nearest: De Pere (8 miles southwest, up to 0.5"); Denmark (12 miles southeast, up to 0.75"); New Franken (12 miles northeast, up to 0.5").
These maps are stills. In the app this date is one of 6 Green Bay 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
3 reports 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.
Hail reports
3 reports Hail size 1.25"
2 WNW Green Bay Brown County
“Quarter sized to half dollar sized hail. Corner of Allard Ave. and Camm Place. (GRB)”
— NOAA / SPC storm report
Hail size 1"
2 N Ashwaubenon Brown County
“Report from mPING: Quarter (1.00 in.). (GRB)”
— NOAA / SPC storm report
Storm 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 Ashwaubenon — beyond Green Bay itself.
Below the severe threshold
What 0.5" hail means for Green Bay 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.
10,977 homes × $12,000 avg. claim
Potential roof exposure
$132M
Potential roof exposure — 10,977 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 55 jobs
- Illustrative work
- ~$825K
Close just 0.5% of the 10,977 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 $2,305 on top of the $150 plan.
Green Bay hail history
Other storms in Green Bay.
6 recorded storm days in Green Bay, WI
Estimated-size surface Storm date Green Bay / WI
Jul 1, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Green Bay / WI
Jun 30, 2026
1.25" Signatures 1.25" Estimated 0.75"
1 ground report Open report →
Estimated-size surface Storm date Green Bay / WI
Jun 24, 2026
0.75" Estimated 0.75"
4 ground reports Open report →
Estimated-size surface Storm date Green Bay / WI
Apr 14, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Green Bay / WI
Mar 30, 2026
1" Signatures 1"
1 ground report Open report →
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Set your territory and alerts today. When hail hits, use Overview to choose your streets and get moving.
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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 3, 2026.