How big was the hail on April 10, 2026?

The maximum estimated stone size anywhere in California that day was 1.00 inches. Sizes vary street to street inside a single swath, so a city's figure is the largest radar estimated anywhere within about 5 miles of it.

Does this mean roofs were damaged?

Radar measures stone size, not damage. Whether a particular roof was damaged depends on stone size, wind direction, roof age and material — only an inspection settles it. These figures tell you where it is worth looking.

How do I see the actual swath on a map?

A HailMate plan puts the whole of California on a real interactive map with this swath and three years of others already on it. $79/mo, and the canvassing tools come with it.

California · April 10, 2026

California hail map — April 10, 2026

Name: California hail map — April 10, 2026
Creator: HailMate

NOAA radar detected hail of an inch or more over 1 California city on April 10, 2026. The largest stones — 1.00″, quarter size — fell over Manteca.

Hail swath map for Manteca, CA on April 10, 2026 showing 1.00 inch hail. — Swath over Manteca on April 10, 2026 — 1.00″ hail. Each city below has its own map for this storm.

Cities hit: 1; in California
Largest stone: 1.00″; quarter size
Impact rating: 3/10; from stone size

Sizes come from NOAA MRMS radar (MESH), which runs about ±0.25″ against ground truth. It is canvass-targeting quality, not claim evidence.

Roofing contractors

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All of California at street level, with this storm already on it
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Homeowners

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This page covers California as a whole. Check your own address to see every storm on record for your roof — the date and the stone size for each one — and we'll email you the full report to keep.

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California cities hit on April 10, 2026

Manteca, CA1.00″ · quarter

What people on the ground measured in California on April 10, 2026

4 reports filed with the National Weather Service — 1 from trained spotters or officials. These are measured stones, not radar estimates, so they are the closest thing to proof that hail actually reached the ground.

1.50″ half dollar size Trained Spotter
Rio Vista, CA3:04 PM PDTSolano County
Trained spotter reports 1.5 inch / ping pong hail in Rio Vista.
1.00″ quarter size Public
Ripon, CA2:07 PM PDTSan Joaquin County
Public report of 1 inch hail, relayed via broadcast media. Time estimated by radar.
0.50″ penny size Public
19 NE Snelling, CA5:27 PM PDTMariposa County
Facebook comment reporting 0.5-0.75 inch hail and convective rotation near Coulterville.
0.25″ penny size Public
24 WSW Hetch Hetchy, CA4:45 PM PDTTuolumne County
Facebook comment from Second Garrotte resident reporting pea-sized hail and numerous lightning flashes.

Reports come from the National Weather Service Local Storm Report feed, ingested every 15 minutes. A report records where the observer was, not the full extent of the swath — treat it as evidence about the storm, not about any one roof.

Hail elsewhere on April 10, 2026

The full US hail map for April 10, 2026 →

Other California hail days

August 12, 20261 city · 1.00″July 21, 20261 city · 1.00″April 9, 20263 cities · 1.00″September 18, 20252 cities · 2.00″September 10, 20258 cities · 2.00″August 26, 20251 city · 1.00″August 25, 20252 cities · 1.00″June 3, 20251 city · 1.50″September 10, 20241 city · 1.50″September 8, 202412 cities · 1.00″September 7, 20243 cities · 1.00″August 19, 20241 city · 1.00″

Every hail day across California →

FAQ

California hail on April 10, 2026

NOAA radar put hail of an inch or more over 1 California city that day. The largest stones — 1.00 inches, quarter size — were over Manteca. Every city hit is listed above with its own stone size.

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