Hail in Spencer · May 17, 2026
NEXRAD logged 0 hail signatures up to 1"; the estimated-size surface reached 0" aloft. Open it on the live map to see the swath over the streets.
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Convective day · May 17, 2026 · noon–noon UTC
Severity
The 6th most severe storm Spencer 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
- 25 /100
- Homes exposed
- 0 /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 Spencer 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.
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.
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.
The storm in context
Where May 17, 2026 sits in Spencer's hail record.
This was Spencer's 3rd recorded hail day, arriving 34 days after the Apr 13, 2026 storm. By severity it ranks 6th of the 7 storms we have logged here. Radar put the day's largest stone over Spencer at 1" — the largest NEXRAD radar signature.
The May 17, 2026 convective day was bigger than Spencer: the same system put hail over 894 other tracked cities, 65 of them in Wisconsin. Nearest: Colby (7 miles north, up to 0"); Loyal (10 miles southwest, up to 1"); Greenwood (12 miles west, up to 1").
These maps are stills. In the app this date is one of 7 Spencer 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 Spencer 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.
Damage-capable hail signal
What 1" hail means for Spencer roofs.
Quarter-size and larger hail can bruise asphalt mats, remove granules, and dent exposed soft metal. The mapped footprint identifies an inspection priority area — it does not identify which individual roofs, if any, sustained damage.
Radar reading · not confirmed damage
Spencer hail history
Other storms in Spencer.
Estimated-size surface Jun 24, 2026
1"
Estimated-size surface Jun 10, 2026
0.5"
Estimated-size surface Jun 9, 2026
0.75"
Estimated-size surface May 27, 2026
1.75"
Estimated-size surface Apr 13, 2026
2.75"
NEXRAD surface Mar 30, 2026
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.
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