The estimated-size surface reached 0.5" aloft; NEXRAD logged no point detections over Columbus Junction 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.
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Convective day · Jun 11, 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
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.
Estimated size field 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 Jun 11, 2026 — this storm produced no NEXRAD point detections over Columbus Junction, so there is one map to show, not two.
The storm in context
This was Columbus Junction's 7th recorded hail day, arriving 27 days after the May 15, 2026 storm. By severity it ranks 6th of the 8 storms we have logged here. Radar put the day's largest stone over Columbus Junction at 0.5" — radar-estimated size aloft.
The Jun 11, 2026 convective day was bigger than Columbus Junction: the same system put hail over 648 other tracked cities, 147 of them in Iowa. Nearest: Conesville (7 miles north, up to 0.5"); Ainsworth (10 miles west, up to 0.5"); Muscatine (10 miles east, up to 0.5").
These maps are stills. In the app this date is one of 8 Columbus Junction 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.
“Two videos of a very narrow needle-like tornado north of Ainsworth in a field. The mesocyclone appeared to be very small as well. With no known damage... this is rated (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.
Reports came from Haskins — beyond Columbus Junction itself.
Below the severe threshold
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
Potential roof exposure
$2.2M
Potential roof exposure — 185 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
Close just 0.5% of the 185 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 $39 on top of the $150 plan.
Columbus Junction hail history
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Estimated-size surface Set your territory and alerts today. When hail hits, use Overview to choose your streets and get moving.
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