Hail in Herndon · Jun 20, 2026
The estimated-size surface reached 3.5" aloft; NEXRAD logged no point detections over Herndon that day. At 3.5" — baseball — this is a severe hail signal associated with roof damage. Open it on the live map to see the swath over the streets.
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Convective day · Jun 20, 2026 · noon–noon UTC
Severity
The 2nd most severe storm Herndon 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
- 88 /100
- Homes exposed
- 56 /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 Herndon 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.
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 20, 2026 — this storm produced no NEXRAD point detections over Herndon, so there is one map to show, not two.
The storm in context
Where Jun 20, 2026 sits in Herndon's hail record.
This was Herndon's 3rd recorded hail day, arriving 22 days after the May 29, 2026 storm. By severity it ranks 2nd of the 9 storms we have logged here. Radar put the day's largest stone over Herndon at 3.5" — radar-estimated size aloft.
The Jun 20, 2026 convective day was bigger than Herndon: the same system put hail over 298 other tracked cities, 121 of them in Kansas. Nearest: Ludell (8 miles west, up to 3.5"); Oberlin (15 miles southeast, up to 3.5"); Trenton (17 miles northwest, up to 3.75").
These maps are stills. In the app this date is one of 9 Herndon 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.
The National Weather Service logged no spotter reports for this storm over Herndon. That absence is ordinary — filing a report takes a person on the spot who saw the hail and phoned it in. What stands as the record for this date is the radar above, which caught the storm regardless.
Severe hail signal
What 3.5" hail means for Herndon roofs.
Two-inch-plus hail is capable of puncturing shingles, breaking skylights or windows, and heavily denting soft materials. The strongest radar bands warrant prompt inspection, but neither the signal nor the footprint confirms damage at a specific address.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
Potential roof exposure
$7.6M
Potential roof exposure — 637 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 3 jobs
- Illustrative work
- ~$45K
Close just 0.5% of the 637 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 $134 on top of the $150 plan.
Herndon hail history
Other storms in Herndon.
Estimated-size surface Aug 27, 2026
0.75"
Estimated-size surface Aug 25, 2026
0.75"
Estimated-size surface Aug 20, 2026
3.25"
Estimated-size surface Aug 14, 2026
0.5"
Estimated-size surface Jul 8, 2026
1.75"
Estimated-size surface Jul 3, 2026
Estimated-size surface May 29, 2026
2.5"
Estimated-size surface May 16, 2026
1"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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For iPhone. Android coming soon.
Web trial: 7 days free. Card required. $150/month after the trial unless cancelled.