The first few days of September were greeted with thunderstorms that brought period of heavy rain to portions of interior Northern California, as well as reports of rockslides, leading to a closure of Highway 70.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS STO wrote it up.
The first few days of September were greeted with thunderstorms that brought period of heavy rain to portions of interior Northern California, as well as reports of rockslides, leading to a closure of Highway 70.
The national radar mosaic for the moment the first event began.
1 heavy rain. Local standard time, as filed.
Caltrans District 2 reported a slide along State Route 70 just south of PG and E Rock Powerhouse due to rainfall over a 24 to 48 hour period. The slide was 3 feet in diameter. The road closure lasted approximately 2 hours and the road reopened at 0850 am on September 3, 2023.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2023Every state in 2023This day in weather historyWarnings in California, September 2023
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-30. Each event’s entry at NCEI: 1141937.