Hail in Armstrong · Aug 7, 2026
NEXRAD logged 0 hail signatures up to 0"; the estimated-size surface reached 1" aloft. Open it on the live map to see the swath over the streets.
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Convective day · Aug 7, 2026 · noon–noon UTC
Severity
The 3rd most severe storm Armstrong 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
- 25 /100
- Homes exposed
- 56 /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 Armstrong saw the hail — from two instruments
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 signature field The point detections NEXRAD recorded overhead. Each signature marks where the radar saw hail aloft — it is a detection, not a stone measured on the ground.
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.
The storm in context
Where Aug 7, 2026 sits in Armstrong's hail record.
This was Armstrong's 12th recorded hail day, arriving 34 days after the Jul 4, 2026 storm. By severity it ranks 3rd of the 14 storms we have logged here. Radar put the day's largest stone over Armstrong at 1" — radar-estimated size aloft.
The Aug 7, 2026 convective day was bigger than Armstrong: the same system put hail over 709 other tracked cities, 114 of them in Iowa. Nearest: Swea City (11 miles east, up to 1"); Granada (12 miles northeast, up to 1.75"); Sherburn (12 miles northwest, up to 1.5").
These maps are stills. In the app this date is one of 14 Armstrong 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.
For this storm over Armstrong, the NWS report log is empty — a common outcome, since ground reports only happen when someone witnesses the hail and takes the time to call it in. The detection record for the date lives in the radar maps above.
Damage-capable hail signal
What 1" hail means for Armstrong roofs.
Quarter-size and larger hail can bruise asphalt mats, remove granules, and dent exposed soft metal. The mapped footprint identifies an inspection priority area — it does not identify which individual roofs, if any, sustained damage.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
Potential roof exposure
$7.5M
Potential roof exposure — 629 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 3 jobs
- Illustrative work
- ~$45K
Close just 0.5% of the 629 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 $132 on top of the $150 plan.
Armstrong hail history
Other storms in Armstrong.
Estimated-size surface Aug 9, 2026
0.5"
Estimated-size surface Aug 8, 2026
0.75"
Estimated-size surface Jul 4, 2026
1"
Estimated-size surface Jun 30, 2026
1"
Estimated-size surface Jun 29, 2026
1"
Estimated-size surface Jun 1, 2026
1.25"
Estimated-size surface May 26, 2026
1"
Estimated-size surface May 25, 2026
1"
Estimated-size surface May 18, 2026
1"
Estimated-size surface May 17, 2026
Estimated-size surface May 15, 2026
2"
NEXRAD surface May 14, 2026
0.75"
Estimated-size surface Apr 13, 2026
2.25"Take your next area into the field.
See the hail, review your recommendations, and canvass with Overview on iPhone.
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