A strong wind storm struck the Bay Area on December 30 during the afternoon and evening hours. Strong winds brought down numerous trees and power lines across the area. The combination of recent heavy rains earlier in the month brought weakened ground conditions and then there were numerous dead trees across the area from years of ongoing drought. Major disruptions to the evening commute due to downed trees and the accidents they caused were observed. Wind gusts of 40-55 MPH were widespread across the area. Despite most areas not reaching 60 MPH, there was widespread wind damage and impacts due to the reasons above.

Strong Wind in SANTA CLARA VALLEY INCLUDING SAN JOSE, CALIFORNIA
From 30-DEC-14 19:15:00 to 30-DEC-14 19:15:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 1.50K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree blown down blocking the Interstate 880 South off ramp onto East Brokaw near Milpitas.

High Wind in EAST BAY HILLS AND THE DIABLO RANGE, CALIFORNIA
From 30-DEC-14 16:00:00 to 30-DEC-14 16:00:00 (PST-8)
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

A wind gust of 64 MPH was measured atop Mt. Diablo.

Strong Wind in SANTA CRUZ MOUNTAINS, CALIFORNIA
From 31-DEC-14 06:16:00 to 31-DEC-14 06:16:00 (PST-8)
Magnitude: 43.00 EG
Property damage: 2.50K
Crop damage: 0.00K
Reported by: Law Enforcement

A four foot diameter tree was blown down blocking both lanes of Empire Grade Road and resulting in a closure of the road.

Strong Wind in NORTH BAY INTERIOR VALLEYS, CALIFORNIA
From 30-DEC-14 11:27:00 to 30-DEC-14 11:27:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A large tree was blown down and blocking both lanes of Old Redwood Highway near Petaluma.

Strong Wind in SANTA CLARA VALLEY INCLUDING SAN JOSE, CALIFORNIA
From 30-DEC-14 14:19:00 to 30-DEC-14 14:19:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A large tree branch was blown down blocking roadway lanes on Pruneridge avenue and San Tomas Expressway.

Strong Wind in SANTA CLARA VALLEY INCLUDING SAN JOSE, CALIFORNIA
From 30-DEC-14 14:23:00 to 30-DEC-14 14:23:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 1.50K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was blown down blocking the slow lane of northbound US 101 about 5 miles south of Milpitas.

Strong Wind in SANTA CLARA VALLEY INCLUDING SAN JOSE, CALIFORNIA
From 30-DEC-14 14:27:00 to 30-DEC-14 14:27:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 1.50K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was blown down across both lanes of East Dunne Avenue at Finley Ridge Road about 4 miles Northeast of Morgan Hill.

Strong Wind in NORTH BAY INTERIOR VALLEYS, CALIFORNIA
From 30-DEC-14 14:29:00 to 30-DEC-14 14:29:00 (PST-8)
Magnitude: 45.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and power poles blown down across Solano Avenue at Orchard about 4 miles northwest of Napa.

Strong Wind in SANTA CLARA VALLEY INCLUDING SAN JOSE, CALIFORNIA
From 30-DEC-14 14:34:00 to 30-DEC-14 14:34:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 1.50K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was blown down blocking the N McKee Avenue off ramp from Interstate 680.

Strong Wind in SANTA CLARA VALLEY INCLUDING SAN JOSE, CALIFORNIA
From 30-DEC-14 16:30:00 to 30-DEC-14 16:30:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 1.50K
Crop damage: 0.00K
Reported by: Law Enforcement

Large tree blown down and blocking most of a roadway.

Strong Wind in EAST BAY INTERIOR VALLEYS, CALIFORNIA
From 30-DEC-14 14:42:00 to 30-DEC-14 14:42:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A large tree was blown down on Kirker Pass Road. The road was closed between Concord and Pittsburg and remained closed for several hours.

Strong Wind in SAN FRANCISCO PENINSULA COAST, CALIFORNIA
From 30-DEC-14 14:42:00 to 30-DEC-14 14:42:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 1.50K
Crop damage: 0.00K
Reported by: Law Enforcement

Tree blown down and blocking the Woodside Off Ramp from Southbound Interstate 280.

Strong Wind in SANTA CLARA VALLEY INCLUDING SAN JOSE, CALIFORNIA
From 30-DEC-14 14:44:00 to 30-DEC-14 14:44:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree blew down onto power lines on Landess Avenue East off ramp from Interstate 680 South.

Strong Wind in NORTH BAY INTERIOR VALLEYS, CALIFORNIA
From 30-DEC-14 14:52:00 to 30-DEC-14 14:52:00 (PST-8)
Magnitude: 45.00 MG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Tree blown down and blocking roadway on North Kelly Road just east of State Route 29. Wind gusts measured at 52 MPH at the Napa Airport at the same time.

Strong Wind in EAST BAY INTERIOR VALLEYS, CALIFORNIA
From 30-DEC-14 14:58:00 to 30-DEC-14 14:58:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree blown down and blocking all eastbound lanes of Interstate 80 just east of Hercules.

Strong Wind in EAST BAY INTERIOR VALLEYS, CALIFORNIA
From 30-DEC-14 15:02:00 to 30-DEC-14 15:02:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Insurance Company

A large pine tree blown down into lanes of eastbound route 4 at Morello Avenue off ramp.

Strong Wind in EAST BAY INTERIOR VALLEYS, CALIFORNIA
From 30-DEC-14 15:03:00 to 30-DEC-14 15:03:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A 30 foot high tree was blown down into portions of the lanes on northbound Interstate 680.

Strong Wind in SAN FRANCISCO BAY SHORELINE, CALIFORNIA
From 30-DEC-14 15:12:00 to 30-DEC-14 15:12:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 1.50K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree blown down into lanes of westbound route 92 near Belmont.

Strong Wind in SAN FRANCISCO BAY SHORELINE, CALIFORNIA
From 30-DEC-14 15:15:00 to 30-DEC-14 15:15:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree blown down across 5th Street On ramp to northbound Interstate 880.

Strong Wind in EAST BAY INTERIOR VALLEYS, CALIFORNIA
From 30-DEC-14 11:31:00 to 30-DEC-14 11:31:00 (PST-8)
Magnitude: 43.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was blown down onto two vehicles on Concord Road.

Strong Wind in NORTH BAY INTERIOR VALLEYS, CALIFORNIA
From 30-DEC-14 11:58:00 to 30-DEC-14 11:58:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Law Enforcement

High voltage power lines were downed onto the roadway on Bodega Avenue between King and Middle Two Rock Roads. Winds were measured up to 50 MPH in the area at that time.

Strong Wind in SAN FRANCISCO BAY SHORELINE, CALIFORNIA
From 30-DEC-14 11:59:00 to 30-DEC-14 11:59:00 (PST-8)
Magnitude: 43.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Tree was blown down blocking both lanes and destroyed the guard rail on Redwood Road. Winds were measured up to 50 MPH in the area at that time.

Strong Wind in NORTH BAY INTERIOR VALLEYS, CALIFORNIA
From 30-DEC-14 16:16:00 to 30-DEC-14 16:16:00 (PST-8)
Magnitude: 43.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Winds broke a telephone pole near Napa. Gusts recorded around 50 MPH at the Napa Airport around this time.

Strong Wind in EAST BAY HILLS AND THE DIABLO RANGE, CALIFORNIA
From 30-DEC-14 16:31:00 to 30-DEC-14 16:31:00 (PST-8)
Magnitude: 43.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

High winds blew down a walnut tree into the roadway in the east foothills.

Strong Wind in SAN FRANCISCO BAY SHORELINE, CALIFORNIA
From 30-DEC-14 16:41:00 to 30-DEC-14 16:41:00 (PST-8)
Magnitude: 43.00 EG
Property damage: 1.50K
Crop damage: 0.00K
Reported by: Law Enforcement

Tree blown down into eastbound lanes blocking traffic towards San Ramon from Castro Valley.

Strong Wind in SANTA CLARA VALLEY INCLUDING SAN JOSE, CALIFORNIA
From 30-DEC-14 17:30:00 to 30-DEC-14 17:30:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees blown down into power lines. Power lines sparked across all lanes of Monterey Road and Highland Avenue near Gilroy. This caused a significant traffic hazard as cars suddenly braked and swerved off the road to avoid the power lines.

Strong Wind in SANTA CRUZ MOUNTAINS, CALIFORNIA
From 30-DEC-14 12:31:00 to 30-DEC-14 12:31:00 (PST-8)
Magnitude: 43.00 EG
Property damage: 1.50K
Crop damage: 0.00K
Reported by: Law Enforcement

Winds blew down a tree across both lanes on Bonny Doon Road, one mile up from State Route 1.

Strong Wind in NORTH BAY INTERIOR VALLEYS, CALIFORNIA
From 30-DEC-14 12:38:00 to 30-DEC-14 12:38:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 0.10K
Crop damage: 0.00K
Reported by: Law Enforcement

A large branch was blown down blocking both lanes of traffic on Lakeville Highway.

Strong Wind in NORTH BAY INTERIOR VALLEYS, CALIFORNIA
From 30-DEC-14 12:55:00 to 30-DEC-14 12:55:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was blown down blocking both lanes on Bohemian near Salmon Creek School. Wind gusts were measured between 40 and 50 MPH at the time.

Strong Wind in SAN FRANCISCO BAY SHORELINE, CALIFORNIA
From 30-DEC-14 16:46:00 to 30-DEC-14 16:46:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 1.50K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree blown down into the lanes of southbound Interstate 280 near Tousdale.

Strong Wind in EAST BAY INTERIOR VALLEYS, CALIFORNIA
From 30-DEC-14 17:00:00 to 30-DEC-14 17:00:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A huge pine tree blown down and blocking an entire roadway.

Strong Wind in SAN FRANCISCO, CALIFORNIA
From 30-DEC-14 13:00:00 to 30-DEC-14 13:00:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Broadcast Media

BART service stopped between 24th Street Mission Station and Balboa Park. Major delays reported system wide due to numerous fallen branches and trees on tracks.

Strong Wind in EAST BAY INTERIOR VALLEYS, CALIFORNIA
From 30-DEC-14 13:04:00 to 30-DEC-14 13:04:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Tree blown down on campus of Kings Valley Christian School on Clayton Road. The fallen tree damaged a fence.

Strong Wind in EAST BAY INTERIOR VALLEYS, CALIFORNIA
From 30-DEC-14 17:20:00 to 30-DEC-14 17:20:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 1.50K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree blown down and blocking lanes on Piedras Circle and White Gate Road.

Strong Wind in NORTH BAY INTERIOR VALLEYS, CALIFORNIA
From 30-DEC-14 17:25:00 to 30-DEC-14 17:25:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 4.50K
Crop damage: 0.00K
Reported by: Law Enforcement

Three substantial size trees blown down and blocking the roadway at State Route 128 and Hoffman Road.

Strong Wind in SANTA CRUZ MOUNTAINS, CALIFORNIA
From 30-DEC-14 13:10:00 to 30-DEC-14 13:10:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Acacia tree blown down across northbound lanes of Graham Hill Road.

Strong Wind in EAST BAY INTERIOR VALLEYS, CALIFORNIA
From 30-DEC-14 13:13:00 to 30-DEC-14 13:13:00 (PST-8)
Magnitude: 43.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Power poles knocked down due to trees falling on them. Downed poles resulted in closure of East Cypress Road. Winds gusting up to 50 MPH in the area.

Strong Wind in SAN FRANCISCO BAY SHORELINE, CALIFORNIA
From 30-DEC-14 17:25:00 to 30-DEC-14 17:25:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 1.50K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree blown down and partially blocking the off ramp from Interstate 580 Eastbound at MacArthur Boulevard.

Strong Wind in SAN FRANCISCO BAY SHORELINE, CALIFORNIA
From 30-DEC-14 17:38:00 to 30-DEC-14 17:38:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 1.50K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was blown down and blocked the off ramp from US 101 North at South Airport Boulevard near Burlingame.

Strong Wind in COASTAL NORTH BAY INCLUDING POINT REYES NATIONAL SEASHORE, CALIFORNIA
From 30-DEC-14 13:22:00 to 30-DEC-14 13:22:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was blown down onto a vehicle at a gas station on state route 1.

Strong Wind in NORTH BAY INTERIOR VALLEYS, CALIFORNIA
From 30-DEC-14 13:22:00 to 30-DEC-14 13:22:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Law Enforcement

Tree branch blown down to block the on ramp at state route 12 at Dutton Avenue.

Strong Wind in SAN FRANCISCO BAY SHORELINE, CALIFORNIA
From 30-DEC-14 13:26:00 to 30-DEC-14 13:26:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Law Enforcement

Tree blown down onto Interstate 980 off ramp at East 27th Street.

Strong Wind in NORTHERN MONTEREY BAY, CALIFORNIA
From 30-DEC-14 13:33:00 to 30-DEC-14 13:33:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 1.50K
Crop damage: 0.00K
Reported by: Law Enforcement

Wires downed by branches on Amesti Road.

Strong Wind in SOUTHERN MONTEREY BAY AND BIG SUR COAST, CALIFORNIA
From 30-DEC-14 17:53:00 to 30-DEC-14 17:53:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 1.50K
Crop damage: 0.00K
Reported by: Law Enforcement

Tree blown down by strong winds and blocking Lopez and Sloat roads in all directions.

Strong Wind in SAN FRANCISCO BAY SHORELINE, CALIFORNIA
From 30-DEC-14 17:57:00 to 30-DEC-14 17:57:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 0.10K
Crop damage: 0.00K
Reported by: Law Enforcement

A huge Christmas tree was blown down into the road and blocked the off ramp from US 101 northbound at Third Street near Daly City.

Strong Wind in SANTA CLARA VALLEY INCLUDING SAN JOSE, CALIFORNIA
From 30-DEC-14 13:34:00 to 30-DEC-14 13:34:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 2.50K
Crop damage: 0.00K
Reported by: Law Enforcement

Large tree blown down on right hand side of US 101 Northbound near Alum Rock Avenue off ramp.

Strong Wind in NORTH BAY INTERIOR VALLEYS, CALIFORNIA
From 30-DEC-14 13:40:00 to 30-DEC-14 13:40:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A fallen tree and power lines onto Blithedale Avenue resulted in the closure of the southbound US 101 Blithedale off ramp.

Strong Wind in SANTA CRUZ MOUNTAINS, CALIFORNIA
From 30-DEC-14 18:03:00 to 30-DEC-14 18:03:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 1.50K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree blown down at La Madrona and Sims Road.

Strong Wind in EAST BAY INTERIOR VALLEYS, CALIFORNIA
From 30-DEC-14 18:15:00 to 30-DEC-14 18:15:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 1.50K
Crop damage: 0.00K
Reported by: Law Enforcement

Tree blown down onto wires blocking both directions near Dublin.

Strong Wind in NORTH BAY INTERIOR VALLEYS, CALIFORNIA
From 30-DEC-14 13:42:00 to 30-DEC-14 13:42:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 1.50K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was blown down blocking a roadway.

Strong Wind in EAST BAY INTERIOR VALLEYS, CALIFORNIA
From 30-DEC-14 13:47:00 to 30-DEC-14 13:47:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 1.50K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was blown down and blocked a lane of Danville Boulevard.

Strong Wind in EAST BAY INTERIOR VALLEYS, CALIFORNIA
From 30-DEC-14 14:00:00 to 30-DEC-14 14:00:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 1.50K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree branch was blown down and is blocking the roadway on Acalanes on ramp to eastbound state route 24.

Strong Wind in EAST BAY INTERIOR VALLEYS, CALIFORNIA
From 30-DEC-14 14:18:00 to 30-DEC-14 14:18:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Law Enforcement

Tree branches blown down blocking Diablo on ramp to northbound Interstate 680.