The radar-estimated size surface caught this storm, reaching 0.75" aloft. NEXRAD logged no point detections over Fort Madison this day.
A tornado was also reported to the National Weather Service during this storm — see the ground reports below.
0.75"
≈ penny to nickel · radar-estimated size aloft1,680
1
1 tornadoOverview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
Largest hailstone — the top predictor of roof damage.
How many homes sit inside the storm's footprint.
Independent storm reports filed with the NWS.
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-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.
Only the radar-estimated size surface resolved for Mar 10, 2026 — this storm produced no NEXRAD point detections over Fort Madison, so there is one map to show, not two.
This was Fort Madison's 1st recorded hail day — the first hail day in our records for the city. By severity it ranks 1st of the 4 storms we have logged here. Radar put the day's largest stone over Fort Madison at 0.75" — radar-estimated size aloft.
The Mar 10, 2026 convective day was bigger than Fort Madison: the same system put hail over 470 other tracked cities, 47 of them in Iowa. Nearest: West Point (9 miles northwest, up to 1.25"); Donnellson (11 miles west, up to 1.5"); Farmington (16 miles west, up to 2").
These maps are stills from Fort Madison's Mar 10, 2026 storm. In the Overview app the same surfaces are live — radar updating in real time, radar-estimated hail size as it forms, and NWS spotter reports pinned where they're filed — with a radar replay you can scrub back over any past day.
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.
“In coordination with the Denmark... IA Fire Dept... an EF1 tornado with maximum winds of 100 mph and path length of 1.2 miles was determined to have occurred on March 1 (DVN)”
— NOAA / SPC storm report
Reports came from Wever — beyond Fort Madison itself.
Hail this size sits right at the edge of the National Weather Service severe threshold. Newer roofs usually shrug it off, but aging or already-worn shingles can bruise, and soft metals — vents, flashing, gutters — often show the first dents.
$20M
Potential roof exposure — 1,680 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.Radar updates in real time, spotter reports appear on the map as they're filed, and the full Fort Madison storm history — this Mar 10, 2026 storm included — sits underneath. When you're ready, draw this storm's footprint and pull highly accurate homeowner contact information for every address inside it.
Highly accurate contact information starting at $0.23 per address — every contact included. Digital leads cost $15–$40. Start with a 7-day free trial — no credit card required. See pricing
4 recorded storm days in Fort Madison, IA
