The estimated-size surface reached 0.75" aloft; NEXRAD logged no point detections over Keokuk that day. Open it on the live map to see the swath over the streets.
A tornado was also reported to the National Weather Service during this storm. The ground reports below show where it was filed.
7-day free trial in the iPhone app. No card required to start.
For iPhone. Android coming soon.
Web trial: 7 days free. Card required. $150/month after the trial unless cancelled.
Convective day · Jun 17, 2026 · noon–noon UTC
Severity
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
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
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 Jun 17, 2026 — this storm produced no NEXRAD point detections over Keokuk, so there is one map to show, not two.
The storm in context
This was Keokuk's 6th recorded hail day, arriving 4 days after the Jun 13, 2026 storm. By severity it ranks 2nd of the 8 storms we have logged here. Radar put the day's largest stone over Keokuk at 0.75" — radar-estimated size aloft.
The Jun 17, 2026 convective day was bigger than Keokuk: the same system put hail over 294 other tracked cities, 33 of them in Iowa. Nearest: Montrose (5 miles west, up to 0.5"); Hamilton (9 miles southeast, up to 0.75"); Argyle (11 miles west, up to 0.5").
These maps are stills. In the app this date is one of 8 Keokuk 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
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.
“A brief EF1 tornado uniquely tracked across three states. This developed just in Lee County... Iowa... with peak winds of 105 mph... and tracked southeast through Clark (DVN)”
— NOAA / SPC storm report
“Time estimated from radar. (DVN)”
— NOAA / SPC storm report
Storm forensics
Read from the arrival times and locations of the NOAA ground reports, not a radar-measured storm track.
Hail was reported over 403 minutes, from to .
Reports came from Warsaw — beyond Keokuk itself.
Near the severe threshold
A signal this size sits near the National Weather Service severe threshold. Aging shingles and soft metals such as vents, flashing, and gutters may be more vulnerable; roof age, wind, and material condition all matter, and only an inspection can confirm damage.
Radar reading · not confirmed damage
Roofing exposure
Potential roof exposure
$25M
Potential roof exposure — 2,044 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
Close just 0.5% of the 2,044 homes in this footprint at the average $15,000 roof job. Illustrative math, not a projection — your results depend on your outreach and how the market responds.
Claim window
June 2028
Claims from this storm can typically be filed until around June 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 $429 on top of the $150 plan.
Keokuk hail history
Estimated-size surface 
Estimated-size surface 
Estimated-size surface 
Estimated-size surface 
NEXRAD surface 
Estimated-size surface 
Estimated-size surface Set your territory and alerts today. When hail hits, use Overview to choose your streets and get moving.
7-day free trial in the iPhone app. No card required to start.
For iPhone. Android coming soon.
Web trial: 7 days free. Card required. $150/month after the trial unless cancelled.