A potent upper level trough with associated cold front moved through on April 6th causing roadway flooding, gusty winds over both land and sea, as well as strong swells which sunk a Bart Barge over the SF Bay. Post frontal conditions on the 8th brought scattered showers, frigid temperatures, and isolated thunderstorms with small hail.

Flood in ALAMEDA, CALIFORNIA
From 07-APR-17 05:35:00 to 07-APR-17 06:35:00 (PST-8)
Location: EMERYVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roadway flooding reported on EB 980 to EB 580, 6 inches deep 2-3 ft into lane.

Flood in SONOMA, CALIFORNIA
From 07-APR-17 20:21:00 to 07-APR-17 21:21:00 (PST-8)
Location: SCHELLVILLE ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Large pool of 6 inch deep water blocking SB lanes of HWY 121.

Flood in SAN FRANCISCO, CALIFORNIA
From 07-APR-17 21:32:00 to 07-APR-17 22:32:00 (PST-8)
Location: OCEAN VIEW
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

US 101 at San Bruno lanes flooded.

Flood in CONTRA COSTA, CALIFORNIA
From 07-APR-17 22:02:00 to 07-APR-17 23:02:00 (PST-8)
Location: ORINDA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Flooding in off ramps of SR24 at Acalanes Rd.

Flood in ALAMEDA, CALIFORNIA
From 07-APR-17 22:25:00 to 07-APR-17 23:25:00 (PST-8)
Location: ESTUDILLO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Slow lane of I880 and I280 connection 6 inches or more of water.

Thunderstorm Wind in ALAMEDA, CALIFORNIA
From 07-APR-17 10:34:00 to 07-APR-17 10:40:00 (PST-8)
Location: FREMONT
Magnitude: 38.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Large tree crashed into a KFC in Newark causing damage to the property. Wind damage likely from previous night. Fremont RAWS reported gust of 44 mph previous night.

Strong Wind in NORTHERN SALINAS VALLEY / HOLLISTER VALLEY / CARMEL VALLEY, CALIFORNIA
From 06-APR-17 19:41:00 to 06-APR-17 19:46:00 (PST-8)
Magnitude: 32.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Tree down blocking entire roadway at Pesante and Coker Rd. Estimated gust taken from SNS airport.

Flood in SAN FRANCISCO, CALIFORNIA
From 06-APR-17 18:10:00 to 06-APR-17 19:10:00 (PST-8)
Location: SAN FRANCISCO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

East bound I80 at 7th St roadway flooding.

Flood in SONOMA, CALIFORNIA
From 07-APR-17 06:49:00 to 07-APR-17 07:49:00 (PST-8)
Location: SANTA ROSA ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roadway flooding reported at NB Ln. near Angela Drive.

Strong Wind in SAN FRANCISCO BAY SHORELINE, CALIFORNIA
From 06-APR-17 22:01:00 to 06-APR-17 22:06:00 (PST-8)
Magnitude: 26.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Large tree limbs down at 33000 block of Dowe Ave in Union City, covering road. Report/pictures via social media. Gust estimate from Fremont RAWS.

Debris Flow in CONTRA COSTA, CALIFORNIA
From 07-APR-17 01:36:00 to 07-APR-17 02:36:00 (PST-8)
Location: TASSAJARA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Closure of road due to mudslides on Morgan Territory Rd.

Strong Wind in SAN FRANCISCO BAY SHORELINE, CALIFORNIA
From 07-APR-17 04:55:00 to 07-APR-17 05:00:00 (PST-8)
Magnitude: 21.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Downed power lines in addition to a land slide on Aitken Dr in Oakland Hills, with homes threatened. Time unknown, location based on social media post by local media. Gust estimate from Lafayette COOP.

Strong Wind in SAN FRANCISCO BAY SHORELINE, CALIFORNIA
From 07-APR-17 05:48:00 to 07-APR-17 05:53:00 (PST-8)
Magnitude: 35.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Major wind damage to roof reported at 2054 Burroughs Ave in San Leandro. Winds likely occurred sometime overnight. Estimated gust from Hayward Airport RAWS.

High Surf in SAN FRANCISCO BAY SHORELINE, CALIFORNIA
From 07-APR-17 08:57:00 to 07-APR-17 09:57:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A BART barge sunk early this morning in the San Francisco Bay due to large surf, strong winds, and heavy rains. Wave heights overnight reached 11 ft and winds gusted to 45 kt off the San Francisco coast.

Strong Wind in SAN FRANCISCO BAY SHORELINE, CALIFORNIA
From 07-APR-17 09:23:00 to 07-APR-17 09:28:00 (PST-8)
Magnitude: 35.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Downed tree and power lines reported in front of house in San Lorenzo. Damage likely from previous night.

Strong Wind in SAN FRANCISCO BAY SHORELINE, CALIFORNIA
From 07-APR-17 09:34:00 to 07-APR-17 09:39:00 (PST-8)
Magnitude: 35.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Downed tree crushes a car in San Leandro. Damage likely from winds previous night. No injuries reported. Estimated gust from Hayward Airport.

Strong Wind in EAST BAY INTERIOR VALLEYS, CALIFORNIA
From 07-APR-17 09:49:00 to 07-APR-17 09:54:00 (PST-8)
Magnitude: 25.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Downed power lines in Walnut Creek. 500 plus homes without power. Wind damage likely from previous night. Estimated gust from Walnut Creek COOP.

Strong Wind in SAN FRANCISCO BAY SHORELINE, CALIFORNIA
From 07-APR-17 11:13:00 to 07-APR-17 11:18:00 (PST-8)
Magnitude: 34.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Tree limb down in Del Ray Park. Likely from overnight winds. Estimated gust from Hayward Airport.

Debris Flow in ALAMEDA, CALIFORNIA
From 07-APR-17 22:45:00 to 07-APR-17 23:45:00 (PST-8)
Location: CASTRO VLY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Half an inch of mud reported at Crow Canyon and Norris Canyon Road near Castro Valley causing cars to slide.

Extreme Cold/Wind Chill in NORTH BAY MOUNTAINS, CALIFORNIA
From 08-APR-17 07:00:00 to 08-APR-17 08:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Thirty people treated for hypothermia, one hospitalized after the swim portion of the Lake Berryessa Triathlon in Napa County. Morning temps were in the 30s with rain occurring. Combination of cold air temps, rain, and latent heat of evaporation lowered core body temps to critical levels. While not extreme cold, the impacts of cold were present.

Hail in SAN MATEO, CALIFORNIA
From 08-APR-17 12:54:00 to 08-APR-17 12:59:00 (PST-8)
Location: HALF MOON BAY
Magnitude: 0.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

High Wind in COASTAL NORTH BAY INCLUDING POINT REYES NATIONAL SEASHORE, CALIFORNIA
From 06-APR-17 17:10:00 to 06-APR-17 21:40:00 (PST-8)
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Gusts above 44 mph measured by mesonet through time period. Peak gust of 58 mph recorded.

Strong Wind in NORTH BAY MOUNTAINS, CALIFORNIA
From 06-APR-17 18:11:00 to 06-APR-17 19:11:00 (PST-8)
Magnitude: 39.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

RAWS measured gusts of at least 44 mph during time period with peak gust of 45 mph.

Strong Wind in SAN FRANCISCO PENINSULA COAST, CALIFORNIA
From 06-APR-17 21:55:00 to 06-APR-17 22:00:00 (PST-8)
Magnitude: 40.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Gust of 46 mph recorded at Half Moon Bay Airport.

High Wind in EAST BAY HILLS AND THE DIABLO RANGE, CALIFORNIA
From 06-APR-17 19:30:00 to 06-APR-17 23:30:00 (PST-8)
Magnitude: 43.00 MS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

Sustained wind speeds of over 40 mph recorded during the period with peak sustained speed of 49 mph and gust of 68 mph.

High Wind in SANTA CRUZ MOUNTAINS, CALIFORNIA
From 06-APR-17 19:32:00 to 07-APR-17 00:32:00 (PST-8)
Magnitude: 72.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

Los Gatos RAWS showed sustained winds above 40 mph during the period with gusts exceeding 70 mph. Peak gust was recorded at 83 mph.

Strong Wind in SAN FRANCISCO, CALIFORNIA
From 06-APR-17 19:32:00 to 06-APR-17 19:42:00 (PST-8)
Magnitude: 41.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet measured gusts of at least 44 mph with a peak gust of 47 mph.

Debris Flow in MARIN, CALIFORNIA
From 07-APR-17 23:19:00 to 08-APR-17 00:19:00 (PST-8)
Location: JEWELL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Rock slide blocking all west bound lanes near Samuel Taylor Park.