Hail in Unionville · May 18, 2026
The estimated-size surface reached 0.5" aloft; NEXRAD logged no point detections over Unionville that day. Open it on the live map to see the swath over the streets.
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Convective day · May 18, 2026 · noon–noon UTC
Severity
The 13th most severe storm Unionville has seen in the last 12 months
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
- Peak hail signal
- 13 /100
- Homes exposed
- 17 /100
- Ground truth
- 0 /100
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
How Unionville 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.
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 May 18, 2026 — this storm produced no NEXRAD point detections over Unionville, so there is one map to show, not two.
The storm in context
Where May 18, 2026 sits in Unionville's hail record.
This was Unionville's 5th recorded hail day, arriving 2 days after the May 16, 2026 storm. By severity it ranks 13th of the 13 storms we have logged here. Radar put the day's largest stone over Unionville at 0.5" — radar-estimated size aloft.
The May 18, 2026 convective day was bigger than Unionville: the same system put hail over 726 other tracked cities, 59 of them in Missouri. Nearest: Green City (15 miles southwest, up to 0.5"); Milan (21 miles southwest, up to 0.5"); Knox City (47 miles southeast, up to 0.5").
These maps are stills. In the app this date is one of 13 Unionville 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
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.
Nobody on the ground filed a report over Unionville for this date, which says more about who was watching than about the storm: spotter reports only exist where there is an observer. The radar surfaces above carry the evidence for this one.
Below the severe threshold
What 0.5" hail means for Unionville roofs.
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
What this storm is worth to a roofer.
Potential roof exposure
$72K
Potential roof exposure — 6 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
Claim window
May 2028
Claims from this storm can typically be filed until around May 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 $1 on top of the $150 plan.
Unionville hail history
Other storms in Unionville.
Estimated-size surface Aug 14, 2026
1"
Estimated-size surface Aug 5, 2026
0.75"
Estimated-size surface Aug 4, 2026
0.75"
Estimated-size surface Jul 20, 2026
1.25"
Estimated-size surface Jun 17, 2026
0.5"
Estimated-size surface Jun 11, 2026
1.5"
Estimated-size surface Jun 10, 2026
1.25"
Estimated-size surface Jun 5, 2026
1"
Estimated-size surface May 16, 2026
1.25"
Estimated-size surface Apr 17, 2026
1.75"
Estimated-size surface Apr 15, 2026
0.75"
Estimated-size surface Apr 2, 2026
0.5"The next storm won’t wait for you.
Set your territory and alerts today. When hail hits, use Overview to choose your streets and get moving.
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