Hail in Alta Vista · Aug 11, 2026
The estimated-size surface reached 1" aloft; NEXRAD logged no point detections over Alta Vista that day. Open it on the live map to see the swath over the streets.
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Convective day · Aug 11, 2026 · noon–noon UTC
Severity
The 3rd most severe storm Alta Vista 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
- 59 /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 Alta Vista saw the hail — from two instruments
The maps here read the same storm from two angles — point detections from NEXRAD, and modeled hail size aloft. Where the two disagree is informative: it marks where estimated size outran the signatures, or trailed them.
Estimated size field The modeled maximum hail size across the swath, derived from radar aloft — the largest stone the storm could have supported, which is not necessarily what reached the ground.
Only the radar-estimated size surface resolved for Aug 11, 2026 — this storm produced no NEXRAD point detections over Alta Vista, so there is one map to show, not two.
The storm in context
Where Aug 11, 2026 sits in Alta Vista's hail record.
This was Alta Vista's 5th recorded hail day, arriving 41 days after the Jul 1, 2026 storm. By severity it ranks 3rd of the 5 storms we have logged here. Radar put the day's largest stone over Alta Vista at 1" — radar-estimated size aloft.
The Aug 11, 2026 convective day was bigger than Alta Vista: the same system put hail over 1,041 other tracked cities, 89 of them in Iowa. Nearest: Orchard (8 miles west, up to 1"); Waucoma (18 miles east, up to 0.75"); Floyd (18 miles west, up to 0.5").
These maps are stills. In the app this date is one of 5 Alta Vista 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.
The National Weather Service logged no spotter reports for this storm over Alta Vista. That absence is ordinary — filing a report takes a person on the spot who saw the hail and phoned it in. What stands as the record for this date is the radar above, which caught the storm regardless.
Damage-capable hail signal
What 1" hail means for Alta Vista 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
$11M
Potential roof exposure — 941 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 5 jobs
- Illustrative work
- ~$75K
Close just 0.5% of the 941 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 $198 on top of the $150 plan.
Alta Vista hail history
Other storms in Alta Vista.
Estimated-size surface Jul 1, 2026
1"
NEXRAD surface May 15, 2026
Estimated-size surface Apr 27, 2026
2.25"
Estimated-size surface Apr 14, 2026
1.75"Take your next area into the field.
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