Wind gust 60 mph
3 WNW Fremont Mahaska County
“Delayed report. (DMX)”
— NOAA / SPC storm report
/ Storm field report · Mahaska
Hail in Oskaloosa · Apr 15, 2026
The estimated-size surface reached 0.5" aloft; NEXRAD logged no point detections over Oskaloosa 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 25
Ground reports 1 1 wind
Radar surfaces 1 Estimated size only
Convective day · Apr 15, 2026 · noon–noon UTC
Severity
The 5th most severe storm Oskaloosa has seen in the last 12 months
Composite score · 1.7 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
1.7 /10
- Peak hail signal
- 13 /100
- Homes exposed
- 28 /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 Oskaloosa saw the hail — from two instruments
Apr 15, 2026 · Oskaloosa, IA
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-estimated hail size Surface resolved
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.
Max size
0.5"
Only the radar-estimated size surface resolved for Apr 15, 2026 — this storm produced no NEXRAD point detections over Oskaloosa, so there is one map to show, not two.
The storm in context
Where Apr 15, 2026 sits in Oskaloosa's hail record.
This was Oskaloosa's 2nd recorded hail day, arriving 13 days after the Apr 2, 2026 storm. By severity it ranks 5th of the 7 storms we have logged here. Radar put the day's largest stone over Oskaloosa at 0.5" — radar-estimated size aloft.
The Apr 15, 2026 convective day was bigger than Oskaloosa: the same system put hail over 425 other tracked cities, 127 of them in Iowa. Nearest: Cedar (9 miles southeast, up to 0.5"); Bussey (13 miles west, up to 0.5"); Fremont (13 miles east, up to 0.5").
These maps are stills. In the app this date is one of 7 Oskaloosa 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 Fremont — beyond Oskaloosa itself.
Below the severe threshold
What 0.5" hail means for Oskaloosa 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.
25 homes × $12,000 avg. claim
Potential roof exposure
$300K
Potential roof exposure — 25 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
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 $5 on top of the $150 plan.
Oskaloosa hail history
Other storms in Oskaloosa.
7 recorded storm days in Oskaloosa, IA
Estimated-size surface Storm date Oskaloosa / IA
Jun 17, 2026
1.25" Estimated 1.25"
No ground reports filed Open report →
Estimated-size surface Storm date Oskaloosa / IA
Jun 11, 2026
2" Estimated 2"
1 ground report Open report →
Estimated-size surface Storm date Oskaloosa / IA
Jun 10, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Oskaloosa / IA
May 18, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Oskaloosa / IA
Apr 23, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Oskaloosa / IA
Apr 2, 2026
0.75" Signatures 0.75"
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 2, 2026.