Hail in Ottawa · Sep 9, 2026
The estimated-size surface reached 0.75" aloft; NEXRAD logged no point detections over Ottawa that day. Open it on the live map to see the swath over the streets.
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Convective day · Sep 9, 2026 · noon–noon UTC
Severity
The 6th most severe storm Ottawa 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
- 58 /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 Ottawa 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 Sep 9, 2026 — this storm produced no NEXRAD point detections over Ottawa, so there is one map to show, not two.
The storm in context
Where Sep 9, 2026 sits in Ottawa's hail record.
This was Ottawa's 8th recorded hail day, arriving 102 days after the May 30, 2026 storm. By severity it ranks 6th of the 8 storms we have logged here. Radar put the day's largest stone over Ottawa at 0.75" — radar-estimated size aloft.
The Sep 9, 2026 convective day was bigger than Ottawa: the same system put hail over 71 other tracked cities, 21 of them in Kansas. Nearest: Pomona (4 miles northwest, up to 0.75"); Baldwin City (13 miles northeast, up to 0.75"); Paola (27 miles east, up to 0.75").
These maps are stills. In the app this date is one of 8 Ottawa 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 Ottawa, 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 Ottawa 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
$9.2M
Potential roof exposure — 764 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 764 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
September 2028
Claims from this storm can typically be filed until around September 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 $160 on top of the $150 plan.
Ottawa hail history
Other storms in Ottawa.
Estimated-size surface May 30, 2026
1.75"
Estimated-size surface Apr 26, 2026
1.25"
Estimated-size surface Apr 23, 2026
1"
Estimated-size surface Apr 17, 2026
2.25"
Estimated-size surface Apr 13, 2026
1.75"
Estimated-size surface Mar 10, 2026
0.75"
NEXRAD surface Mar 5, 2026
Take your next area into the field.
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