The radar-estimated size surface caught this storm, reaching 1.25" aloft. NEXRAD logged no point detections over Onslow this day.
A tornado was also reported to the National Weather Service during this storm — see the ground reports below.
1.25"
≈ half-dollar · radar-estimated size aloft2,074
2
1 hail · 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.
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.
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.
Only the radar-estimated size surface resolved for Apr 14, 2026 — this storm produced no NEXRAD point detections over Onslow, so there is one map to show, not two.
This was Onslow's 1st recorded hail day — the first hail day in our records for the city. By severity it ranks 3rd of the 5 storms we have logged here. Radar put the day's largest stone over Onslow at 1.25" — radar-estimated size aloft.
The Apr 14, 2026 convective day was bigger than Onslow: the same system put hail over 476 other tracked cities, 143 of them in Iowa. Nearest: Center Junction (6 miles southwest, up to 1.25"); Monmouth (6 miles southeast, up to 1.5"); Cascade (10 miles north, up to 1.5").
These maps are stills from Onslow's Apr 14, 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.
“EFU tornado confirmed based on multiple chaser videos and spotter reports. No known damage along its estimated 2.6 mile path. Tornado path determined by radar and video (DVN)”
— NOAA / SPC storm report
“Photo provided. Time estimated using radar. (DVN)”
— NOAA / SPC storm report
Hail was reported over 23 minutes, from to .
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.
$25M
Potential roof exposure — 2,074 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 Onslow storm history — this Apr 14, 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
5 recorded storm days in Onslow, IA
Jun 28, 2026
2.5"
Jun 7, 2026
0.75"
Apr 23, 2026
1"
Apr 17, 2026
2.5"