Tornado Rating unknown
Rye Brook Westchester County
“Trees & wires down around Lawridge Dr in Purchase. (OKX)”
— NOAA / SPC storm report
/ Storm field report · Fairfield
Hail in Greenwich · Jul 21, 2026
NEXRAD logged 3 hail signatures up to 1"; the estimated-size surface reached 0.5" aloft. Open it on the live map to see the swath over the streets.
A tornado was also reported to the National Weather Service during this storm. The ground reports below show where it was filed.
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Peak hail signal 1" ≈ quarter · the largest NEXRAD radar signature
Homes in the hail footprint 1,607
Ground reports 3 3 tornado
Radar surfaces 2 NEXRAD + estimated size
Convective day · Jul 21, 2026 · noon–noon UTC
Severity
The most severe storm Greenwich has seen in the last 12 months
Composite score · 4.6 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
4.6 /10
- Peak hail signal
- 25 /100
- Homes exposed
- 64 /100
- Ground truth
- 100 /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 Greenwich saw the hail — from two instruments
Jul 21, 2026 · Greenwich, CT
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.
NEXRAD radar signatures Surface resolved
Radar signature field The point detections NEXRAD recorded overhead. Each signature marks where the radar saw hail aloft — it is a detection, not a stone measured on the ground.
Max size
1"
Detections
3
Radar-estimated hail size Surface resolved
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.
Max size
0.5"
The storm in context
Where Jul 21, 2026 sits in Greenwich's hail record.
This was Greenwich's 1st recorded hail day — the first hail day in our records for the city. By severity it ranks 1st of the 2 storms we have logged here. Radar put the day's largest stone over Greenwich at 1" — the largest NEXRAD radar signature.
The Jul 21, 2026 convective day was bigger than Greenwich: the same system put hail over 703 other tracked cities, 6 of them in Connecticut. Nearest: West Harrison (5 miles west, up to 1"); Riverside (7 miles south, up to 1.25"); Norwalk (10 miles east, up to 0.5").
These maps are stills. In the app this date is one of 2 Greenwich 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
3 reports filed with the NWS
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.
Tornado reports
3 reports Tornado Rating unknown
1 N Harrison Westchester County
“Corrects previous report from tstm wnd dmg to tornado. Several trees down at Manhattanville University. (OKX)”
— NOAA / SPC storm report
Tornado Rating unknown
1 W Rye Brook Westchester County
“Several trees uprooted and/or large limbs broken or sheared in the vicinity of the corner of Lincoln Avenue and Loden Lane. (OKX)”
— NOAA / SPC storm report
Storm forensics
How the storm moved
Timing and place names from NOAA ground reports
Read from the arrival times and locations of the NOAA ground reports, not a radar-measured storm track.
Reports came from Rye Brook and Harrison — beyond Greenwich itself.
Damage-capable hail signal
What 1" hail means for Greenwich roofs.
Quarter-size and larger hail can bruise asphalt mats, remove granules, and dent exposed soft metal. The mapped footprint identifies an inspection priority area — it does not identify which individual roofs, if any, sustained damage.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
1,607 homes × $12,000 avg. claim
Potential roof exposure
$19M
Potential roof exposure — 1,607 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 8 jobs
- Illustrative work
- ~$120K
Close just 0.5% of the 1,607 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
July 2028
Claims from this storm can typically be filed until around July 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 $337 on top of the $150 plan.
Greenwich hail history
Other storms in Greenwich.
2 recorded storm days in Greenwich, CT
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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A storm day here is a convective day — it runs from noon to noon
UTC, so late-night hail is grouped with the afternoon storm that
spawned it rather than split across two calendar dates. Ground
reports are public-domain observations from the NOAA Storm
Prediction Center. Radar tells you where to look. Only an inspection confirms damage at an address. Last updated Aug 8, 2026.