Hail in Knoxville · Jun 27, 2026
NEXRAD logged 1 hail signature up to 0.5"; 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 · Jun 27, 2026 · noon–noon UTC
Severity
The 4th most severe storm Knoxville 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
- 57 /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 Knoxville saw the hail — from two instruments
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.
Radar signature field Where NEXRAD flagged hail as the storm passed — point signatures from the radar, which indicate hail overhead rather than confirm what landed.
Only the NEXRAD radar-signature surface resolved for Jun 27, 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 Jun 27, 2026 sits in Knoxville's hail record.
This was Knoxville's 1st recorded hail day — the first hail day in our records for the city. By severity it ranks 4th of the 6 storms we have logged here. Radar put the day's largest stone over Knoxville at 0.5" — the largest NEXRAD radar signature.
The Jun 27, 2026 convective day was bigger than Knoxville: the same system put hail over 587 other tracked cities, 11 of them in Tennessee. Nearest: Monterey (63 miles west, up to 0.5"); Warne (64 miles south, up to 1.25"); Morganton (76 miles south, up to 0.75").
These maps are stills. In the app this date is one of 6 Knoxville 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.
No ground reports were filed with the National Weather Service for this storm over Knoxville. That is common: a report depends on someone being there to see it and take the time to call it in. The radar surfaces above are the record here — the storm was detected from above even though no one on the ground logged it.
Below the severe threshold
What 0.5" hail means for Knoxville 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
$8.4M
Potential roof exposure — 702 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 4 jobs
- Illustrative work
- ~$60K
Close just 0.5% of the 702 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 $147 on top of the $150 plan.
Knoxville hail history
Other storms in Knoxville.
Estimated-size surface Aug 20, 2026
0.5"
Estimated-size surface Aug 17, 2026
0.75"
Estimated-size surface Jul 28, 2026
1.25"
Estimated-size surface Jul 5, 2026
0.5"
Estimated-size surface Jul 3, 2026
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Set your territory and alerts today. When hail hits, use Overview to choose your streets and get moving.
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