Hail size 4.5"
Ryan Delaware County
“Report of golf ball to softball sized hail. (DVN)”
— NOAA / SPC storm report
/ Storm field report · Delaware
Hail in Coggon · Aug 7, 2026
Hit 36 days ago
The estimated-size surface reached 2.5" aloft; NEXRAD logged no point detections over Coggon that day. At 2.5" — baseball — this is a severe hail signal associated with roof damage. Open it on the live map to see the swath over the streets.
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Peak hail signal 2.5" ≈ baseball · radar-estimated size aloft
Homes in the hail footprint 2,739
Ground reports 3 1 hail · 2 wind
Radar surfaces 1 Estimated size only
Convective day · Aug 7, 2026 · noon–noon UTC
Severity
The most severe storm Coggon has seen in the last 12 months
Composite score · 6.2 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
6.2 /10
- Peak hail signal
- 63 /100
- Homes exposed
- 69 /100
- Ground truth
- 50 /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 Coggon saw the hail — from two instruments
Aug 7, 2026 · Coggon, IA
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-estimated hail size Surface resolved
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.
Max size
2.5"
Only the radar-estimated size surface resolved for Aug 7, 2026 — this storm produced no NEXRAD point detections over Coggon, so there is one map to show, not two.
The storm in context
Where Aug 7, 2026 sits in Coggon's hail record.
This was Coggon's 6th recorded hail day, arriving 36 days after the Jul 2, 2026 storm. By severity it ranks 1st of the 6 storms we have logged here. Radar put the day's largest stone over Coggon at 2.5" — radar-estimated size aloft.
The Aug 7, 2026 convective day was bigger than Coggon: the same system put hail over 709 other tracked cities, 114 of them in Iowa. Nearest: Anamosa (9 miles southeast, up to 2.25"); Hopkinton (13 miles east, up to 1.75"); Manchester (14 miles north, up to 2.25").
These maps are stills. In the app this date is one of 6 Coggon 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
3 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
2 reports Wind gust 70 mph
Ryan Delaware County
“(DVN)”
— NOAA / SPC storm report
Wind gust 60 mph
Ryan Delaware County
“(DVN)”
— 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 11 minutes, from to .
Reports came from Ryan — beyond Coggon itself.
Severe hail signal
What 2.5" hail means for Coggon roofs.
Two-inch-plus hail is capable of puncturing shingles, breaking skylights or windows, and heavily denting soft materials. The strongest radar bands warrant prompt inspection, but neither the signal nor the footprint confirms damage at a specific address.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
2,739 homes × $12,000 avg. claim
Potential roof exposure
$33M
Potential roof exposure — 2,739 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 14 jobs
- Illustrative work
- ~$210K
Close just 0.5% of the 2,739 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
August 2028
Claims from this storm can typically be filed until around August 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 $575 on top of the $150 plan.
Coggon hail history
Other storms in Coggon.
6 recorded storm days in Coggon, IA
Estimated-size surface Storm date Coggon / IA
Jul 2, 2026
1.25" Signatures 1.25" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Coggon / IA
Apr 23, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Coggon / IA
Apr 17, 2026
1.5" Signatures 1.5" Estimated 0.75"
1 ground report Open report →
Estimated-size surface Storm date Coggon / IA
Apr 15, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Coggon / IA
Apr 14, 2026
1" Estimated 1"
1 ground report 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 8, 2026.