Hail size 1"
3 SSE Alleman Polk County
“(DMX)”
— NOAA / SPC storm report
/ Storm field report · Polk
Hail in Alleman · Jul 20, 2026
The estimated-size surface reached 1.75" aloft; NEXRAD logged no point detections over Alleman that day. Open it on the live map to see the swath over the streets.
7-day free trial in the iPhone app. No card required to start.
For iPhone. Android coming soon.
Web trial: 7 days free. Card required. $150/month after the trial unless cancelled.
Peak hail signal 1.75" ≈ golf ball · radar-estimated size aloft
Homes in the hail footprint 12,611
Ground reports 2 1 hail · 1 wind
Radar surfaces 1 Estimated size only
Convective day · Jul 20, 2026 · noon–noon UTC
Severity
The 2nd most severe storm Alleman has seen in the last 12 months
Composite score · 5.2 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
5.2 /10
- Peak hail signal
- 44 /100
- Homes exposed
- 82 /100
- Ground truth
- 33 /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
Jul 20, 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.
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
1.75"
Only the radar-estimated size surface resolved for Jul 20, 2026 — this storm produced no NEXRAD point detections over Alleman, so there is one map to show, not two.
The storm in context
Where Jul 20, 2026 sits in Alleman's hail record.
This was Alleman's 5th recorded hail day, arriving 18 days after the Jul 2, 2026 storm. By severity it ranks 2nd of the 6 storms we have logged here. Radar put the day's largest stone over Alleman at 1.75" — radar-estimated size aloft.
The Jul 20, 2026 convective day was bigger than Alleman: the same system put hail over 553 other tracked cities, 178 of them in Iowa. Nearest: Polk City (5 miles west, up to 1.75"); Elkhart (5 miles east, up to 1"); Ankeny (7 miles south, up to 1.75").
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
2 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
1 reportWind reports
1 report Wind gust 58 mph
2 W Ankeny Polk County
“Measured from personal weather station. (DMX)”
— 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.
Hail was reported over 15 minutes, from to .
Reports came from Ankeny — beyond Alleman itself.
High damage potential
What 1.75" hail means for Alleman roofs.
Hail around an inch and a half is capable of cracking shingles, stripping granules, and denting gutters, vents, and siding. Risk is usually greatest near the strongest radar signal, but property-level damage still requires an on-site inspection.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
12,611 homes × $12,000 avg. claim
Potential roof exposure
$151M
Potential roof exposure — 12,611 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 63 jobs
- Illustrative work
- ~$945K
Close just 0.5% of the 12,611 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
July 2028
Claims from this storm can typically be filed until around July 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 $2,648 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 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
Apr 17, 2026
0.5" Estimated 0.5"
1 ground report Open report →
Estimated-size surface Storm date Alleman / IA
Mar 6, 2026
0.75" Estimated 0.75"
No ground reports filed Open report →
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.
7-day free trial in the iPhone app. No card required to start.
For iPhone. Android coming soon.
Web trial: 7 days free. Card required. $150/month after the trial unless cancelled.
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.