1.5-inch hail reported 1 mi SW of Rio Vista Muni Arpt
A trained spotter reported ping pong sized hail 1.5 inches in diameter in Rio Vista with severe thunderstorms.
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TPO is a heat-welded single-ply membrane common on commercial and low-slope roofs. It is white and reflective, and seam quality is what mostly decides its lifespan.
For Contra Costa County, NOAA lists 0 hail reports, 2 damaging-wind reports (up to 50 mph) and 0 tornado reports from January 2024 to June 2026. These count reports, not damaged roofs.
A trained spotter reported ping pong sized hail 1.5 inches in diameter in Rio Vista with severe thunderstorms.
San Francisco International Airport reported a peak wind gust of 73 mph at 2:56 AM. Wind gusts above 58 mph were noted between 2:40 and 2:59 AM.
A 83 mph gust was recorded at the San Francisco International Airport at 6:02 AM Saturday.
Source: NOAA NCEI Storm Events Database, data through Jun 30, 2026. All storm reports for Shell Ridge
| Job | Typical US range |
|---|---|
| Flat roof (TPO / EPDM), average home | $5,000 – $12,000 |
National planning ranges for an average ~2,000 sq ft home, not quotes. Local labor, roof pitch, layers to remove, materials and permits change the price.
A thermoplastic polyolefin single-ply membrane whose seams are heat-welded; common on flat commercial roofs.
Both work. TPO is heat-welded and reflective; EPDM is a rubber membrane with glued or taped seams. Installer experience matters more than the name.
Many cities and counties require a building permit for roof work; the roofing company normally pulls it. Ask who is responsible and request a copy. Check with the Contra Costa County building department for local rules.
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