Hail in Sumner Apr 17, 2026
Both radar surfaces caught this storm: NEXRAD logged 8 hail signatures up to 1.25", and the radar-estimated size reached 0.5" aloft.
1.25"
≈ half-dollar · the largest NEXRAD radar signature247
0
none filedThe 2nd most severe storm Sumner has seen in the last 12 months
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
- Hail size
- 31 /100
- Homes exposed
- 48 /100
- Ground truth
- 0 /100
Largest hailstone — the top predictor of roof damage.
How many homes sit inside the storm's footprint.
Independent storm reports filed with the NWS.
How Sumner 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.
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.
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.
Where Apr 17, 2026 sits in Sumner's hail record
This was Sumner's 1st recorded hail day — the first hail day in our records for the city. By severity it ranks 2nd of the 3 storms we have logged here. Radar put the day's largest stone over Sumner at 1.25" — the largest NEXRAD radar signature.
The Apr 17, 2026 convective day was bigger than Sumner: the same system put hail over 1,016 other tracked cities, 201 of them in Iowa. Nearest: Hawkeye (10 miles northeast, up to 2.25"); Fairbank (10 miles south, up to 1.25"); Tripoli (11 miles west, up to 1.25").
These maps are stills from Sumner's Apr 17, 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.
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 Sumner. 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.
What 1.25" hail means for Sumner roofs
Quarter-size and larger hail is where asphalt shingle damage starts in earnest: bruised mats and granule loss that homeowners can't see from the ground. Most people inside the footprint won't know their roof was hit until someone inspects it.
$3M
Potential roof exposure — 247 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.Track hail over Sumner on the live map
Radar updates in real time, spotter reports appear on the map as they're filed, and the full Sumner storm history — this Apr 17, 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
3 recorded storm days in Sumner, IA
