Hail in Dow City · 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 Dow City 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
- 0 /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 Dow City 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.
Radar signature field Where NEXRAD flagged hail as the storm passed — point signatures from the radar, which indicate hail overhead rather than confirm what landed.
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.
The storm in context
Where Aug 13, 2026 sits in Dow City's hail record.
This was Dow City's 8th recorded hail day, arriving 1 day after the Aug 12, 2026 storm. By severity it ranks 9th of the 9 storms we have logged here. Radar put the day's largest stone over Dow City at 0.5" — radar-estimated size aloft.
The Aug 13, 2026 convective day was bigger than Dow City: the same system put hail over 437 other tracked cities, 46 of them in Iowa. Nearest: Harlan (22 miles south, up to 0.5"); Kirkman (22 miles southeast, up to 0.5"); Moorhead (23 miles west, up to 0.5").
These maps are stills. In the app this date is one of 9 Dow City 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 Dow City, 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 Dow City 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
Dow City hail history
Other storms in Dow City.
Estimated-size surface Sep 6, 2026
1.25"
Estimated-size surface Aug 12, 2026
0.5"
Estimated-size surface Aug 11, 2026
0.75"
Estimated-size surface Jul 8, 2026
1.75"
Estimated-size surface Jul 4, 2026
1"
Estimated-size surface May 17, 2026
1"
Estimated-size surface Apr 23, 2026
2.5"
Estimated-size surface Apr 15, 2026
3"Take your next area into the field.
See the hail, review your recommendations, and canvass with Overview on iPhone.
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