Hail in Grand Canyon · Oct 20, 2026
The estimated-size surface reached 0.5" aloft; NEXRAD logged no point detections over Grand Canyon that day. Open it on the live map to see the swath over the streets.
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Convective day · Oct 20, 2026 · noon–noon UTC
Severity
Grand Canyon's only recorded storm 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
- 24 /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 Grand Canyon 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 Oct 20, 2026 — this storm produced no NEXRAD point detections over Grand Canyon, so there is one map to show, not two.
The storm in context
Where Oct 20, 2026 sits in Grand Canyon's hail record.
This was Grand Canyon's 1st recorded hail day — the first hail day in our records for the city. By severity it ranks 1st of the 1 storms we have logged here. Radar put the day's largest stone over Grand Canyon at 0.5" — radar-estimated size aloft.
The Oct 20, 2026 convective day was bigger than Grand Canyon: the same system put hail over 19 other tracked cities, 18 of them in Arizona. Nearest: North Rim (7 miles north, up to 0.5"); Fredonia (73 miles northwest, up to 0.5"); Chino Valley (84 miles south, up to 0.75").
These maps are stills. In the app this date is one of 1 Grand Canyon storm date 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 Grand Canyon. 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 Grand Canyon 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
$168K
Potential roof exposure — 14 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
Claim window
October 2028
Claims from this storm can typically be filed until around October 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 $3 on top of the $150 plan.
Grand Canyon hail history
Grand Canyon's hail record.
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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Web trial: 7 days free. Card required. $150/month after the trial unless cancelled.