Hail in Spencer · May 31, 2026
NEXRAD logged 0 hail signatures up to 0"; 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 31, 2026 · noon–noon UTC
Severity
The 9th 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
- 0 /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
Two instruments, one storm: NEXRAD logs the point signatures it detected overhead, while the estimated-size surface models how large the hail aloft could have grown. Agreement between them is not guaranteed — the gaps are where the model ran ahead of, or behind, the detections.
Radar signature field NEXRAD's hail signatures for this storm: the spots the radar detected from above. A detection overhead is not the same thing as a confirmed stone below.
Estimated size field Radar-estimated maximum hail size across the swath, modeled from radar aloft. It reflects the biggest stone the storm could support, which may differ from what actually fell.
The storm in context
Where May 31, 2026 sits in Spencer's hail record.
This was Spencer's 5th recorded hail day, arriving 6 days after the May 25, 2026 storm. By severity it ranks 9th of the 10 storms we have logged here. Radar put the day's largest stone over Spencer at 0" — radar-estimated size aloft.
The May 31, 2026 convective day was bigger than Spencer: the same system put hail over 637 other tracked cities, 44 of them in Iowa. Nearest: Sioux Rapids (11 miles south, up to 1"); Hartley (16 miles northwest, up to 0"); Sanborn (23 miles west, up to 0").
These maps are stills. In the app this date is one of 10 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.
No ground reports were filed with the National Weather Service for this storm over Spencer. That is common: a report depends on someone being there to see it and take the time to call it in. The radar surfaces above are the record here — the storm was detected from above even though no one on the ground logged it.
Below the severe threshold
What 0" hail means for Spencer 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
Spencer hail history
Other storms in Spencer.
Estimated-size surface Sep 6, 2026
0.75"
Estimated-size surface Aug 8, 2026
1.25"
Estimated-size surface Jul 1, 2026
1"
Estimated-size surface Jun 28, 2026
1.75"
Estimated-size surface Jun 27, 2026
1.75"
Estimated-size surface May 25, 2026
Estimated-size surface May 17, 2026
1.75"
NEXRAD surface Apr 22, 2026
0.75"
Estimated-size surface Apr 13, 2026
1.25"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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