High Wind, Alameda / Contra Costa
- When
- December 21, 9:36 AM PST to 5:30 PM PST
- Where
- Alameda / Contra Costa forecast zone
- Measured
- 58 kt (67 mph)
- Property damage
- $25,000
- Reported by
- AWOS,ASOS,MESONET,ETC
High Wind in California, December 21 to 22, 1999
A strong high pressure inland and a low offshore created strong neasterly downslope wind in the Oakland and Contra Costa Co. hills.
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- $125,000
- Crop damage
- None recorded
- Events
- 2
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.
What happened
The episode as NWS MTR wrote it up.
A strong high pressure inland and a low offshore created strong neasterly downslope wind in the Oakland and Contra Costa Co. hills. A strong offshore gradient created high downslope winds in the Oakland hills area. A number of large tress were downed and power was lost for 10,000 people.
Event by event
2 high wind. Local standard time, as filed.
High Wind, Alameda / Contra Costa
- When
- December 21, 10:00 PM PST to December 22, 10:00 AM PST
- Where
- Alameda / Contra Costa forecast zone
- Measured
- 61 kt (70 mph)
- Property damage
- $100,000
- Reported by
- AWOS,ASOS,MESONET,ETC
What these are
- High Wind
- Sustained non-thunderstorm winds of 40 mph or more for an hour, or gusts of 58 mph or more.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Wildfire and Dust Storm in California, December 21 to 22, 1999
- Heavy Snow and High Wind in Alaska, December 21 to 22, 1999
- Ice Storm in Alabama, December 21, 1999
- Winter Storm in Michigan, December 21 to 24, 1999
- Winter Storm in Colorado, December 21, 1999
- Wildfire in California, December 21 to 27, 1999
- Wildfire in California, December 21 to 23, 1999
More
Every storm in California in 1999Every state in 1999This day in weather historyWarnings in California, December 1999
Sources
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 2026-09-24. Each event’s entry at NCEI: 5724736, 5724737.