A Pacific storm and atmospheric river will impact the Pacific Northwest states and northern Rockies this weekend, bringing locally heavy low elevations rain and heavy high elevation snow in the mountains. By Sunday over the Interior Northwest, rain combined with snowmelt will increase the risk of flood hazards. Flood Watches are in effect. Read More >
| Wind Event April 8th 2013 | |||||||
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Strong and gusty northwest winds impacted much of the Bay Area resulting in downed trees, downed power lines, rough seas and even broken windows. A weak cold front moved through the Bay Area during the overnight hours of April 8th. The frontal passage brought light to moderate rainfall to the region with amounts totaling a few tenths of an inch. More importantly, the frontal passage brought damaging winds to the region. As the cold front exited quickly to the south and east of the Bay Area high pressure began to build over the Pacific Northwest and Northern California. As a result, the northerly pressure gradient increased rapidly during the early morning hours of April 8th. In fact, the San Francisco to Las Vegas gradient was greater than 20 mb while the San Francisco to Sacramento gradient was greater than 4 mb. The rather strong northerly pressure gradient helped to produce widespread wind gusts in excess of 35 mph with a few locations over 60 mph. (complete list of wind gusts). Numerous reports of downed trees and power lines were received as a result of the strong winds(complete list of damage reports). The strong winds also impacted KSFO airport and a Airport Weather Warning (AWW) was issued for gusts up to 40 kts. The last major wind event to impact the Bay Area was January 4th, 2008 where 100 mph gusts were reported. Over the coastal waters the strong winds helped to produce hazardous conditions with steep wind waves and confused seas. Gale Warnings were in effect for much of the coastal waters including San Francisco Bay. Buoy observations indicated many locations were near storm force conditions with several gusts up to 47 kts. Buoy 26, east of the Farallon Islands, reported one hour of storm force conditions with a gust up to 49 kts. The strong winds and fresh swell also resulted in combined seas up to 20 feet, as noted by the Half Moon Bay Buoy (Buoy 12). |
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| Local Storm Report (LSR) - Wind Gusts and Wind Damage | |||||||
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
247 AM PDT TUE APR 9 2013
...TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
...DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0712 AM NON-TSTM WND DMG 5 NE BEN LOMOND 37.17N 122.03W
04/08/2013 SANTA CRUZ CA LAW ENFORCEMENT
10 INCH DIAMETER TREE LIMB DOWN AND BLOCKING
WESTBOUND LANE OF BEAR CREEK ROAD
0700 AM NON-TSTM WND DMG 3 W MONTEREY 36.60N 121.94W
04/08/2013 MONTEREY CA LAW ENFORCEMENT
TREES AND POWER LINES IN THE ROADWAY ON
MISSION ROAD.
0645 AM NON-TSTM WND GST 6 WNW BIG SUR VILLAGE 36.31N 121.90W
04/08/2013 M65 MPH MONTEREY CA OTHER FEDERAL
MEASURED AT POINT SUR LIGHT STATION - NPS OBSERVATION.
0639 AM NON-TSTM WND DMG 3 NW INVERNESS 38.11N 122.89W
04/08/2013 MARIN CA LAW ENFORCEMENT
TREE DOWN BLOCKING ROADWAY
0544 AM NON-TSTM WND DMG 10 SSE SALINAS 36.55N 121.55W
04/08/2013 MONTEREY CA LAW ENFORCEMENT
EUCALYPTUS TREE DOWN BLOCKING NORTHBOUND
LANE OF RIVER ROAD.
0540 AM NON-TSTM WND DMG 6 NE DALY CITY 37.75N 122.41W
04/08/2013 SAN FRANCISCO CA DEPT OF HIGHWAYS
LARGE TREE FELL ON OVERHEAD UTILITY POLE.
VIA TWITTER.
0518 AM NON-TSTM WND DMG 4 WNW FELTON 37.06N 122.15W
04/08/2013 SANTA CRUZ CA LAW ENFORCEMENT
POWER LINES AND A POLE DOWN IN THE ROADWAY
WITH A TREE ACROSS TEH ROADWAY NEAR THE
INTERSECTION OF PINE FLAT AND ICE CREAM
GRADE ROADS.
0438 AM NON-TSTM WND DMG 3 S WOODSIDE 37.39N 122.26W
04/08/2013 SAN MATEO CA LAW ENFORCEMENT
DOWNED POWER LINES BLOCKING HWY 84.
0315 AM NON-TSTM WND DMG 3 NW SAN FRANCISCO 37.80N 122.45W
04/08/2013 SAN FRANCISCO CA LAW ENFORCEMENT
TREE BLOCKING SOUTH BOUND 101 JUST SOUTH OF
THE GOLDEN GATE BRIDGE.
0257 AM NON-TSTM WND GST 57 SE HOLLISTER 36.35N 120.60W
04/08/2013 M60 MPH SAN BENITO CA MESONET
REPORTED AT SANTA RITA RAWS
0252 AM NON-TSTM WND DMG PETALUMA 38.24N 122.63W
04/08/2013 SONOMA CA BROADCAST MEDIA
TREE BRANCHES KNOCKED DOWN...DEBRIS ON
STREETS. VIA TWITTER
0242 AM NON-TSTM WND DMG NNE MONTE RIO 38.47N 123.01W
04/08/2013 SONOMA CA LAW ENFORCEMENT
LARGE TREE BRANCH BLOCKING THE MIDDLE OF THE
LANE AT STATE ROAD 116 AND F STREET.
0215 AM NON-TSTM WND DMG DALY CITY 37.69N 122.47W
04/08/2013 SAN MATEO CA BROADCAST MEDIA
REPORT VIA TWITTER - BLOWN OUT FRONT HOUSE
WINDOW WITH GLASS EVERYWHERE.
0212 AM NON-TSTM WND GST 1 SE COLMA 37.66N 122.44W
04/08/2013 M60 MPH SAN MATEO CA ASOS
REPORTED AT ASOS STATION SFO
0157 AM NON-TSTM WND GST 5 W SAN FRANCISCO 37.77N 122.51W
04/08/2013 M75 MPH SAN FRANCISCO CA MESONET
REPORTED AT APRSWXNET STATION DW5422
0151 AM NON-TSTM WND GST 1 SSW WOODACRE 37.99N 122.64W
04/08/2013 M59 MPH MARIN CA MESONET
REPORTED AT WOODACRE RAWS
0143 AM NON-TSTM WND GST 5 W SAN FRANCISCO 37.78N 122.51W
04/08/2013 M62 MPH SAN FRANCISCO CA PUBLIC
MEASURED 62 MPH WIND GUST NEAR OCEAN BEACH
0100 AM NON-TSTM WND GST 3 NW DALY CITY 37.71N 122.50W
04/08/2013 M62 MPH SAN FRANCISCO CA MESONET
MEASURED 62 MPH WIND GUST AT FORT FUNSTON
1218 AM NON-TSTM WND GST 9 ENE FREMONT 37.55N 121.84W
04/08/2013 M61 MPH ALAMEDA CA MESONET
REPORTED AT GOES STATION PEAC1
&&
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JOHNSON/MEHLE
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| Public Information Statement (PNS) - Wind Gusts for various sites | |||||||
PUBLIC INFORMATION STATEMENT NATIONAL WEATHER SERVICE SAN FRANCISCO CA 313 AM PDT TUE APR 9 2013 ...WIND GUSTS IN EXCESS OF 35 MPH IN THE PAST 36 HOURS... ...LOCATION... ...TIME... ...WIND... 5 W SAN FRANCISCO (SAN FRANCISCO CA) 157 AM APR 8 75 MPH DRAKES BAY - PT REYES (MARINE ) 218 AM APR 8 62 MPH CALAVERAS RD RAWS (ALAMEDA CA) (GOES) 1218 AM APR 8 61 MPH SANTA RITA GOES (SAN BENITO CA) (GOES) 257 AM APR 8 60 MPH SAN FRANCISCO WSO AP (SAN MATEO CA) 212 AM APR 8 60 MPH WOODACRE RAWS (MARIN CA) (MTR-ALERT) 151 AM APR 8 59 MPH LOS VAQUEROS RAWS (CONTRA COSTA CA) 245 PM APR 8 57 MPH BUOY 26 (MARINE ) (MARITIME) 250 AM APR 8 56 MPH BUOY 13 (MARINE ) (MARITIME) 1250 AM APR 8 54 MPH BUOY 12 (MARINE ) (MARITIME) 450 AM APR 8 54 MPH 2 NW VINE HILL (MARINE ) (NOS-PORTS) 112 AM APR 8 54 MPH 8 NW INVERNESS (MARIN CA) (WXFLOW) 125 AM APR 8 53 MPH 3 WSW CUPERTINO (SANTA CLARA CA) 410 AM APR 8 52 MPH 2 ENE REDWOOD CITY (SAN MATEO CA) 330 AM APR 8 52 MPH 28 WSW SANTA CRUZ (MARINE ) (MARITIME) 350 AM APR 8 51 MPH BUOY 28 (MARINE ) (MARITIME) 650 AM APR 8 51 MPH 1 E BURLINGAME (SAN MATEO CA) (WXFLOW) 300 AM APR 8 51 MPH 3 NW SAN FRANCISCO (MARINE ) 948 PM APR 7 50 MPH 25 SW GREENFIELD (MONTEREY CA) 210 AM APR 8 50 MPH 8 NE YOUNTVILLE (NAPA CA) (RAWS) 1229 AM APR 8 50 MPH 2 ENE SAN MATEO (SAN MATEO CA) (WXFLOW) 339 AM APR 8 49 MPH HALF MOON BAY AIRPORT (SAN MATEO CA) 415 AM APR 8 49 MPH EMERALD LAKE HILLS (SAN MATEO CA) 411 AM APR 8 49 MPH 3 SE TIBURON (MARIN CA) (10 FT)(WXFLOW) 1056 PM APR 7 49 MPH PULGAS RAWS (SAN MATEO CA) (GOES) 318 AM APR 8 48 MPH METROPOLITAN INTL APT (ALAMEDA CA) 159 AM APR 8 48 MPH 12 WSW INVERNESS (MARIN CA) (MESOWEST) 220 PM APR 8 48 MPH 9 WSW BOULDER CREEK (SANTA CRUZ CA) 515 AM APR 8 47 MPH BLACK MOUNTAIN (SAN BENITO CA) (GOES) 207 AM APR 8 47 MPH 1 W BODEGA BAY (MARINE ) (WXFLOW) 1240 AM APR 8 47 MPH 1 WSW EL GRANADA (SAN MATEO CA) 328 AM APR 8 47 MPH 1 ESE EAST PALO ALTO (SANTA CLARA CA) 346 AM APR 8 47 MPH 4 WNW WEST PITTSBURG (MARINE ) 1136 PM APR 7 47 MPH 2 WNW VINE HILL (MARINE ) (NOS-PORTS) 1218 AM APR 8 47 MPH 4 WSW SAN LEANDRO (MARINE ) (WXFLOW) 1219 AM APR 8 46 MPH 1 SW SAN FRANCISCO (SAN FRANCISCO CA) 218 AM APR 8 46 MPH 1 NNW REDWOOD CITY (SAN MATEO CA) 315 AM APR 8 46 MPH 26 SW GREENFIELD (MONTEREY CA) 420 PM APR 8 46 MPH 2 WSW RODEO (CONTRA COSTA CA) (WXFLOW) 1250 AM APR 8 46 MPH ALTAMONT (ALAMEDA CA) (1436 FT)(GOES) 712 PM APR 7 45 MPH BLACK DIAMOND RAWS (CONTRA COSTA CA) 128 AM APR 8 45 MPH BARNABY RAWS (MARIN CA) (820 FT)(GOES) 228 AM APR 8 45 MPH TAMALPAIS-HOMESTEAD (MARIN CA) 1100 PM APR 7 45 MPH SAN JOSE INTERNATIONAL AIRPORT 337 AM APR 8 44 MPH 2 SSE FAIRVIEW (ALAMEDA CA) (APRSWXNET) 400 PM APR 8 44 MPH BRIONES RAWS (CONTRA COSTA CA) (GOES) 128 AM APR 8 44 MPH 3 SSW RICHMOND (CONTRA COSTA CA) 127 AM APR 8 44 MPH 2 ENE SAN MATEO (SAN MATEO CA) (WXFLOW) 308 AM APR 8 44 MPH 4 N SAN FRANCISCO (SAN FRANCISCO CA) 1107 PM APR 7 44 MPH 2 N PITTSBURG (CONTRA COSTA CA) 124 AM APR 8 43 MPH 5 WSW BERKELEY (MARINE ) (WXFLOW) 1121 PM APR 7 43 MPH 1 WNW RODEO (MARINE ) (NOS-PORTS) 1254 AM APR 8 43 MPH 4 W LAS LOMAS (SANTA CRUZ CA) 1243 AM APR 8 43 MPH 3 NW SAN JOSE (SANTA CLARA CA) 405 AM APR 8 43 MPH PINNACLES RAWS (SAN BENITO CA) (GOES) 437 AM APR 8 42 MPH MONTEREY (MONTEREY CA) (NOS-NWLON) 630 AM APR 8 42 MPH 1 N BRISBANE (SAN MATEO CA) (WXFLOW) 306 AM APR 8 42 MPH CORTE MADERA (MARIN CA) (12 FT)(WXFLOW) 115 AM APR 8 42 MPH 1 WSW BERKELEY (ALAMEDA CA) (WXFLOW) 1057 PM APR 7 42 MPH HASTINGS RAWS (MONTEREY CA) (GOES) 511 AM APR 8 42 MPH 3 WNW NOVATO (MARIN CA) (APRSWXNET) 1148 PM APR 7 42 MPH ROSE PEAK RAWS (ALAMEDA CA) (GOES) 1228 AM APR 8 42 MPH 3 N SAN FRANCISCO (MARINE ) (WXFLOW) 1137 PM APR 7 42 MPH 2 SE RICHMOND (CONTRA COSTA CA) 1217 AM APR 8 42 MPH MONTEREY PENINSULA AIRPORT 440 AM APR 8 41 MPH 1 W POINT ARENA (MARINE ) (NOS-NWLON) 936 PM APR 7 41 MPH HAWKEYE RAWS (SONOMA CA) (RAWS) 256 AM APR 8 41 MPH 3 NW SAN FRANCISCO (MARINE ) (WXFLOW) 300 AM APR 8 41 MPH SALINAS AP (MONTEREY CA) (74 FT)(ASOS) 324 AM APR 8 40 MPH CONCORD BUCHANAN FIELD 104 AM APR 8 40 MPH 5 SSW BERKELEY (ALAMEDA CA) (NOS-PORTS) 1112 PM APR 7 40 MPH 12 SSE SANTA CRUZ (MARINE ) (MARITIME) 401 AM APR 8 40 MPH CORDOZA RIDGE RAWS (SANTA CLARA CA) 302 AM APR 8 39 MPH 3 SSW SAUSALITO (MARIN CA) (WXFLOW) 1148 PM APR 7 39 MPH BRADLEY RAWS (MONTEREY CA) (GOES) 612 PM APR 8 39 MPH 3 S RICHMOND (CONTRA COSTA CA) 118 AM APR 8 39 MPH 3 W OAKLAND (ALAMEDA CA) (WXFLOW) 1200 AM APR 8 39 MPH 7 E LIVERMORE (ALAMEDA CA) (AIRNOW) 100 PM APR 8 39 MPH MOFFETT FIELD NAVAL AIR STATION 322 AM APR 8 39 MPH 4 SE OCCIDENTAL (SONOMA CA) (APRSWXNET) 1103 PM APR 7 39 MPH 1 N SAN MATEO (SAN MATEO CA) 249 AM APR 8 39 MPH 3 WSW RICHMOND (MARINE ) (NOS-PORTS) 218 AM APR 8 39 MPH 1 E LARKSPUR (MARIN CA) (20 FT)(WXFLOW) 310 AM APR 8 39 MPH 2 SSE SAN RAFAEL (MARIN CA) (WXFLOW) 301 AM APR 8 38 MPH PT REYES RCA (MARIN CA) (MESOWEST) 220 PM APR 8 38 MPH 4 SSW BERKELEY (MARINE ) (NOS-PORTS) 1206 AM APR 8 38 MPH 2 SSE EAST PALO ALTO (SANTA CLARA CA) 357 AM APR 8 38 MPH 1 NNE HIGHLANDS (SAN MATEO CA) 412 AM APR 8 38 MPH 2 SW SARATOGA (SANTA CLARA CA) 310 AM APR 8 38 MPH 3 S RICHMOND (CONTRA COSTA CA) 103 AM APR 8 38 MPH MALLORY RIDGE RAWS (CONTRA COSTA CA) 802 PM APR 7 38 MPH 2 SW EL CERRITO (MARINE ) (WXFLOW) 1205 AM APR 8 37 MPH 2 NE SAN JOSE (SANTA CLARA CA) (AWOS) 350 PM APR 8 37 MPH 1 W BRENTWOOD (CONTRA COSTA CA) 1245 PM APR 8 37 MPH 4 E EAST FOOTHILLS (SANTA CLARA CA) 200 AM APR 8 37 MPH 1 S ANTIOCH (CONTRA COSTA CA) 1250 AM APR 8 37 MPH 3 SE HAYWARD (ALAMEDA CA) (APRSWXNET) 1229 AM APR 8 37 MPH LIVERMORE MUNICIPAL AIRPORT 1203 AM APR 8 37 MPH 3 N PIEDMONT (ALAMEDA CA) (APRSWXNET) 1228 AM APR 8 37 MPH NAPA COUNTY AIRPORT (NAPA CA) (ASOS) 1250 PM APR 8 37 MPH 3 NW HEALDSBURG (SONOMA CA) 835 AM APR 8 37 MPH 9 NNE ANGWIN (NAPA CA) (APRSWXNET) 1241 PM APR 8 36 MPH 1 SW SAN FRANCISCO (SAN FRANCISCO CA) 229 AM APR 8 36 MPH 3 ENE GILROY (SANTA CLARA CA) 403 AM APR 8 36 MPH 2 N BROADMOOR (SAN FRANCISCO CA) 309 AM APR 8 36 MPH 5 NE DAY VALLEY (SANTA CLARA CA) 443 AM APR 8 36 MPH SAN MARTIN (SANTA CLARA CA) (AWOS) 355 AM APR 8 36 MPH SANTA ROSA SONOMA CO AP (SONOMA CA) 318 AM APR 8 36 MPH 4 W SAN FRANCISCO (SAN FRANCISCO CA) 314 AM APR 8 35 MPH HAYWARD AIR TERMINAL (ALAMEDA CA) 116 PM APR 8 35 MPH BLACKHAWK (CONTRA COSTA CA) (APRSWXNET) 1207 AM APR 9 35 MPH OBSERVATIONS ARE COLLECTED FROM A VARIETY OF SOURCES WITH VARYING EQUIPMENT AND EXPOSURES. NOT ALL DATA LISTED IS CONSIDERED OFFICIAL. THE NATIONAL WEATHER SERVICE THANKS ITS PRIVATE AND PUBLIC PARTNERS FOR PROVIDING US WITH THIS DATA. $$ |
MMEHLE
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