Hail in Union · Mar 15, 2026
NEXRAD logged 4 hail signatures up to 0.75"; the estimated-size surface had no signal that day. Open it on the live map to see the swath over the streets.
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Convective day · Mar 15, 2026 · noon–noon UTC
Severity
The 3rd most severe storm Union 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
- 19 /100
- Homes exposed
- 60 /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 Union saw the hail — from two instruments
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.
Radar signature field NEXRAD's hail signatures for this storm: the spots the radar detected from above. A detection overhead is not the same thing as a confirmed stone below.
Only the NEXRAD radar-signature surface resolved for Mar 15, 2026 — the estimated-size swath had no hail signal to model for this storm, so there is one map to show, not two.
The storm in context
Where Mar 15, 2026 sits in Union's hail record.
This was Union's 1st recorded hail day — the first hail day in our records for the city. By severity it ranks 3rd of the 8 storms we have logged here. Radar put the day's largest stone over Union at 0.75" — the largest NEXRAD radar signature.
The Mar 15, 2026 convective day was bigger than Union: the same system put hail over 695 other tracked cities, 59 of them in Missouri. Nearest: Villa Ridge (11 miles east, up to 0.75"); Saint Clair (11 miles southeast, up to 0.75"); New Haven (15 miles north, up to 0.5").
These maps are stills. In the app this date is one of 8 Union 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.
For this storm over Union, the NWS report log is empty — a common outcome, since ground reports only happen when someone witnesses the hail and takes the time to call it in. The detection record for the date lives in the radar maps above.
Near the severe threshold
What 0.75" hail means for Union roofs.
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
What this storm is worth to a roofer.
Potential roof exposure
$12M
Potential roof exposure — 1,009 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 5 jobs
- Illustrative work
- ~$75K
Close just 0.5% of the 1,009 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
March 2028
Claims from this storm can typically be filed until around March 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 $212 on top of the $150 plan.
Estimated-size surface Aug 5, 2026
0.5"
Estimated-size surface Jul 31, 2026
Estimated-size surface Jul 5, 2026
0.5"
Estimated-size surface Jul 4, 2026
1.75"
Estimated-size surface Jun 11, 2026
0.5"
Estimated-size surface Apr 27, 2026
2.25"
Estimated-size surface Apr 15, 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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