Flash Flooding and Hail in California, February 7 to 9, 1999

Name: Flash Flooding and Hail in California, February 7 to 9, 1999
Start: 1999-02-07T08:45
End: 1999-02-09T16:00
Location: California

February 7 to 9, 1999 · NWS MTR · 7 events in 6 counties and zones

3 high wind, 2 flash flood, 1 heavy rain, 1 hail, as filed by the National Weather Service.

Where it happened

Every event with a place to put it; 4 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

Open the live radar over this ground

The toll

Deaths: 1
Injuries: 0
Property damage: $1.0 million
Crop damage: None recorded
Events: 7

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 radar

The Sacramento radar (KDAX), 57 km away, was scanning. The volume nearest the first event began at 21:58 UTC.

Open the radar archive at this moment

Event by event

3 high wind, 2 flash flood, 1 heavy rain, 1 hail. Local standard time, as filed.

Flash Flood, Napa

When: February 7, 8:45 AM PST to 11:45 AM PST
Where: Napa County, North Portion
Reported by: AWOS,ASOS,MESONET,ETC
Coordinates: 38.507, -122.330 (the zone’s center; the record gives no point)

Widespread rain of 4 to 6 inches fell over most of the North Bay Counties with nearly 5 inches in 24 hours near Napa and Santa Rosa.. The Upper Napa River at St Helena crested at 09:41 PST at 13.26 ft. . A number of other small creeks and urban areas recieved some floodiing with some county roads closed by water..

Heavy Rain, Marin

When: February 7, 12:00 PM PST
Where: Marin County, Lagunitas
Deaths: 1 direct, 0 indirect
Property damage: $24,000
Reported by: LAW ENFORCEMENT
Coordinates: 38.055, -122.749 (the zone’s center; the record gives no point)

a 70 year old woman was killed 2 miles from Luganitas in Mariun County by a 100 foot tree that fell on her car due to the soggy ground and wind.

Flash Flood, Alameda

When: February 9, 8:00 AM PST to 4:00 PM PST
Where: Alameda County, Niles
Reported by: DEPT OF HIGHWAYS
Coordinates: 37.651, -121.918 (the zone’s center; the record gives no point)

Niles Canyon road closed due to flooding and mud slide due to heavy rain.

High Wind, Sonoma / Marin

When: February 9, 11:00 AM PST
Where: Sonoma / Marin forecast zone
Measured: 50 kt (58 mph)
Property damage: $300,000
Reported by: GENERAL PUBLIC

High Wind, San Francisco

When: February 9, 1:09 PM PST
Where: San Francisco forecast zone
Measured: 60 kt (69 mph)
Property damage: $100,000
Reported by: NWS EMPLOYEE(OFF DUTY)
Coordinates: 37.778, -122.442 (the zone’s center; the record gives no point)

Winds gusting to an estimated 60 Kts blew down scaffolding around the civic center and crushed six cars on the street below in downtown San Francisco.

Hail, Alameda

When: February 9, 2:00 PM PST to 2:10 PM PST
Where: Alameda County, Oakland
Measured: 0.75 in hail
Reported by: BROADCAST MEDIA
Coordinates: 37.780, -122.220

Smal hail fell in and around the Oakland Zoo.

High Wind, Alameda / Contra Costa

When: February 9, 2:00 PM PST to 2:15 PM PST
Where: Alameda / Contra Costa forecast zone
Measured: 50 kt (58 mph)
Property damage: $600,000
Reported by: NEWSPAPER

Three large eucyliptus trees were blown into three houses in the Oakland Hills. Winds estimated.

The people who died

As the offices recorded each death: direct deaths were caused by the weather itself, indirect ones by something it set in motion.

Event	Date	Age	Sex	Where	Kind
Heavy Rain, Marin	1999-02-07	70	Female	Telephone	Direct

What these are

Flash Flood: Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.
Heavy Rain: Rainfall totals unusual for the place and season that did not produce a flood.
High Wind: Sustained non-thunderstorm winds of 40 mph or more for an hour, or gusts of 58 mph or more.
Hail: Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in California in 1999 Every state in 1999 This day in weather history Warnings in California, February 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: 5691767, 5691768, 5691772, 5691773, 5691771, 5691769, 5691770.