Hail in Niagara · May 11, 2026
NEXRAD logged 0 hail signatures up to 0"; 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 · May 11, 2026 · noon–noon UTC
Severity
The 9th most severe storm Niagara 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
- 0 /100
- Homes exposed
- 0 /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 Niagara 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 May 11, 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 May 11, 2026 sits in Niagara's hail record.
This was Niagara's 2nd recorded hail day, arriving 19 days after the Apr 22, 2026 storm. By severity it ranks 9th of the 10 storms we have logged here. Radar put the day's largest stone over Niagara at 0" — radar-estimated size aloft.
The May 11, 2026 convective day was bigger than Niagara: the same system put hail over 40 other tracked cities, 1 of them in North Dakota. Nearest: Mekinock (26 miles east, up to 0"); Red Lake Falls (72 miles east, up to 0"); Twin Valley (97 miles southeast, up to 0").
These maps are stills. In the app this date is one of 10 Niagara 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 Niagara. 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.
Below the severe threshold
What 0" hail means for Niagara 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
Niagara hail history
Other storms in Niagara.
Estimated-size surface Sep 3, 2026
1.25"
Estimated-size surface Aug 24, 2026
0.75"
Estimated-size surface Aug 2, 2026
1.25"
Estimated-size surface Jul 30, 2026
0.75"
Estimated-size surface Jul 24, 2026
2.5"
Estimated-size surface Jun 29, 2026
2.5"
Estimated-size surface Jun 3, 2026
1.25"
Estimated-size surface Jun 2, 2026
1"
NEXRAD surface Apr 22, 2026
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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