Hail size 1"
Ankeny Polk County
“(DMX)”
— NOAA / SPC storm report
/ Storm field report · Polk
Hail in Alleman · Apr 17, 2026
NEXRAD logged 0 hail signatures up to 0"; the estimated-size surface reached 0.5" aloft. 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 3,245
Ground reports 1 1 hail
Radar surfaces 2 NEXRAD + estimated size
Convective day · Apr 17, 2026 · noon–noon UTC
Severity
The 6th most severe storm Alleman has seen in the last 12 months
Composite score · 2.8 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
2.8 /10
- Peak hail signal
- 13 /100
- Homes exposed
- 70 /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 Alleman saw the hail — from two instruments
Apr 17, 2026 · Alleman, 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.
NEXRAD radar signatures Surface resolved
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.
Max size
0"
Detections
0
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"
The storm in context
Where Apr 17, 2026 sits in Alleman's hail record.
This was Alleman's 2nd recorded hail day, arriving 42 days after the Mar 6, 2026 storm. By severity it ranks 6th of the 6 storms we have logged here. Radar put the day's largest stone over Alleman at 0.5" — radar-estimated size aloft.
The Apr 17, 2026 convective day was bigger than Alleman: the same system put hail over 1,016 other tracked cities, 201 of them in Iowa. Nearest: Ankeny (7 miles south, up to 0.5"); Bondurant (9 miles southeast, up to 1"); Maxwell (11 miles east, up to 2.25").
These maps are stills. In the app this date is one of 6 Alleman 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.
Hail 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 Ankeny — beyond Alleman itself.
Below the severe threshold
What 0.5" hail means for Alleman 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.
3,245 homes × $12,000 avg. claim
Potential roof exposure
$39M
Potential roof exposure — 3,245 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 16 jobs
- Illustrative work
- ~$240K
Close just 0.5% of the 3,245 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 $681 on top of the $150 plan.
Alleman hail history
Other storms in Alleman.
6 recorded storm days in Alleman, IA
Map unavailable
NEXRAD surface Storm date Alleman / IA
Sep 8, 2026
2.75" Estimated 2.75"
6 ground reports Open report →
Estimated-size surface Storm date Alleman / IA
Jul 20, 2026
1.75" Estimated 1.75"
2 ground reports Open report →
Estimated-size surface Storm date Alleman / IA
Jul 2, 2026
1" Signatures 1" Estimated 1"
No ground reports filed Open report →
Estimated-size surface Storm date Alleman / IA
Jun 11, 2026
0.75" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Alleman / IA
Mar 6, 2026
0.75" Estimated 0.75"
No ground reports filed 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 Sep 9, 2026.