Hail in Norwalk · Aug 13, 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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Convective day · Aug 13, 2026 · noon–noon UTC
Severity
The 9th most severe storm Norwalk 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
- 13 /100
- Homes exposed
- 46 /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 Norwalk 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 13, 2026 sits in Norwalk's hail record.
This was Norwalk's 9th recorded hail day, arriving 17 days after the Jul 27, 2026 storm. By severity it ranks 9th of the 10 storms we have logged here. Radar put the day's largest stone over Norwalk at 0.5" — radar-estimated size aloft.
The Aug 13, 2026 convective day was bigger than Norwalk: the same system put hail over 437 other tracked cities, 46 of them in Iowa. Nearest: Carlisle (8 miles east, up to 0.5"); Indianola (9 miles southeast, up to 0.5"); Van Meter (16 miles west, up to 0.5").
These maps are stills. In the app this date is one of 10 Norwalk 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 Norwalk, 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.
Below the severe threshold
What 0.5" hail means for Norwalk 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.
Potential roof exposure
$2.4M
Potential roof exposure — 201 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 1 job
- Illustrative work
- ~$15K
Close just 0.5% of the 201 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 $42 on top of the $150 plan.
Norwalk hail history
Other storms in Norwalk.
Estimated-size surface Sep 8, 2026
1.5"
Estimated-size surface Jul 27, 2026
0.75"
Estimated-size surface Jul 20, 2026
1.5"
Estimated-size surface Jul 3, 2026
1"
Estimated-size surface Jul 2, 2026
1.75"
Estimated-size surface Jun 10, 2026
0.75"
Estimated-size surface May 15, 2026
1"
Estimated-size surface Apr 17, 2026
1"
Estimated-size surface Mar 6, 2026
Take your next area into the field.
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