Hail in Marthasville · Sep 9, 2026
The estimated-size surface reached 0.5" aloft; NEXRAD logged no point detections over Marthasville that day. Open it on the live map to see the swath over the streets.
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Convective day · Sep 9, 2026 · noon–noon UTC
Severity
The 3rd most severe storm Marthasville 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
- 40 /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 Marthasville saw the hail — from two instruments
Two instruments, one storm: NEXRAD logs the point signatures it detected overhead, while the estimated-size surface models how large the hail aloft could have grown. Agreement between them is not guaranteed — the gaps are where the model ran ahead of, or behind, the detections.
Estimated size field Radar-estimated maximum hail size across the swath, modeled from radar aloft. It reflects the biggest stone the storm could support, which may differ from what actually fell.
Only the radar-estimated size surface resolved for Sep 9, 2026 — this storm produced no NEXRAD point detections over Marthasville, so there is one map to show, not two.
The storm in context
Where Sep 9, 2026 sits in Marthasville's hail record.
This was Marthasville's 4th recorded hail day, arriving 128 days after the May 4, 2026 storm. By severity it ranks 3rd of the 4 storms we have logged here. Radar put the day's largest stone over Marthasville at 0.5" — radar-estimated size aloft.
The Sep 9, 2026 convective day was bigger than Marthasville: the same system put hail over 71 other tracked cities, 7 of them in Missouri. Nearest: Hermann (8 miles west, up to 0.5"); Labadie (28 miles southeast, up to 0.5"); Pacific (35 miles southeast, up to 0.5").
These maps are stills. In the app this date is one of 4 Marthasville 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 Marthasville. 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.
Below the severe threshold
What 0.5" hail means for Marthasville 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
$1.2M
Potential roof exposure — 98 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
Claim window
September 2028
Claims from this storm can typically be filed until around September 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 $21 on top of the $150 plan.
Marthasville hail history
Other storms in Marthasville.
May 4, 2026
0.5"
Estimated-size surface Apr 26, 2026
1.75"
Estimated-size surface Apr 17, 2026
1"Take your next area into the field.
See the hail, review your recommendations, and canvass with Overview on iPhone.
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