Tornado Rating unknown
Rye Brook Westchester County
“Trees & wires down around Lawridge Dr in Purchase. (OKX)”
— NOAA / SPC storm report
Hail in Greenwich Jul 21, 2026
Hit 13 days agoBoth radar surfaces caught this storm: NEXRAD logged 3 hail signatures up to 1", and the radar-estimated size reached 0.5" aloft.
A tornado was also reported to the National Weather Service during this storm — see the ground reports below.
Largest hailstone
1"
≈ quarter · the largest NEXRAD radar signature Homes in the hail footprint
1,607
Ground reports
3
3 tornadoGreenwich's only recorded storm in the last 12 months
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
4.6 /10
- Hail size
- 25 /100
- Homes exposed
- 64 /100
- Ground truth
- 100 /100
Largest hailstone — the top predictor of roof damage.
How many homes sit inside the storm's footprint.
Independent storm reports filed with the NWS.
How Greenwich 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.
NEXRAD radar signatures
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
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"
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 1 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 (0 miles north, up to 1"); Riverside (9 miles southeast, up to 1.25"); Mamaroneck (14 miles south, up to 1").
These maps are stills from Greenwich's Jul 21, 2026 storm. In the Overview app the same surfaces are live — radar updating in real time, radar-estimated hail size as it forms, and NWS spotter reports pinned where they're filed — with a radar replay you can scrub back over any past day.
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.
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
Read from the arrival times and locations of the NOAA ground reports,
not a radar-measured storm track.
How the storm moved
Reports came from Rye Brook and Harrison — beyond Greenwich itself.
What 1" hail means for Greenwich roofs
Quarter-size and larger hail is where asphalt shingle damage starts in earnest: bruised mats and granule loss that homeowners can't see from the ground. Most people inside the footprint won't know their roof was hit until someone inspects it.
What this storm is worth to a roofer
$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
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.
Track hail over Greenwich on the live map
Radar updates in real time, spotter reports appear on the map as they're filed, and the full Greenwich storm history — this Jul 21, 2026 storm included — sits underneath. When you're ready, draw this storm's footprint and pull highly accurate homeowner contact information for every address inside it.
Highly accurate contact information starting at $0.23 per address — every contact included. Digital leads cost $15–$40. Start with a 7-day free trial — no credit card required. See pricing
Greenwich hail history
← All hail in Greenwich 1 recorded storm day in Greenwich, CT
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 surfaces are detections and estimates,
not confirmed damage. Last updated Aug 3, 2026.