Alert archive / California / Wind Advisories in 2017

Wind Advisory 8, NWS San Francisco Bay Area, CA

February 6, 201710 counties in California

NWS San Francisco Bay Area, CA issued this wind advisory at Feb 6, 2017, 2:25 AM PST for 10 counties in California. It took effect at Feb 6, 2017, 9:00 PM PST. It was in force for 16 hr.

The area

The counties it named.

The facts

Issued
Feb 6, 2017, 2:25 AM PST (10:25 UTC)
In effect from
Feb 6, 2017, 9:00 PM PST
Expired
Feb 7, 2017, 1:00 PM PST
In force
16 hr
Issued by
NWS San Francisco Bay Area, CA

Counties Alameda County, CA, City and County of San Francisco, CA, Contra Costa County, CA, Marin County, CA, Monterey County, CA, San Benito County, CA, San Mateo County, CA, Santa Clara County, CA, Santa Cruz County, CA, Sonoma County, CA

The radar

The San Francisco radar (KMUX), 35 km from the middle of the area, began a volume at 10:27 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Oakland, CA (KOAK), launched 00:00Z, 10.4 hours before the alert went out and 34 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Oakland, CA at 00:00Z on 2017-02-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Oakland, CA at 00:00Z on 2017-02-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 136 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
4 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
1061 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
136 m²/s²
0-3 km storm-relative helicity
162 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

532 
WWUS76 KMTR 061025
NPWMTR

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
225 AM PST MON FEB 6 2017

CAZ006-505-507>513-517-518-528>530-062300-
/O.NEW.KMTR.WI.Y.0008.170207T0500Z-170207T1400Z/
SAN FRANCISCO-
COASTAL NORTH BAY INCLUDING POINT REYES NATIONAL SEASHORE-
NORTH BAY MOUNTAINS-SAN FRANCISCO BAY SHORELINE-
SAN FRANCISCO PENINSULA COAST-EAST BAY INTERIOR VALLEYS-
EAST BAY HILLS AND THE DIABLO RANGE-SANTA CRUZ MOUNTAINS-
SANTA CLARA VALLEY INCLUDING SAN JOSE-
SANTA LUCIA MOUNTAINS AND LOS PADRES NATIONAL FOREST-
MOUNTAINS OF SAN BENITO COUNTY AND INTERIOR MONTEREY COUNTY
INCLUDING PINNACLES NATIONAL PARK-
NORTHERN SALINAS VALLEY/HOLLISTER VALLEY AND CARMEL VALLEY-
NORTHERN MONTEREY BAY-SOUTHERN MONTEREY BAY AND BIG SUR COAST-
INCLUDING THE CITIES OF...SAN FRANCISCO...TAMALPAIS-HOMESTEAD...
SAUSALITO...ANGWIN...LAGUNITAS-FOREST KNOLLS...WOODACRE...
OAKLAND...FREMONT...HAYWARD...DALY CITY...BERKELEY...PACIFICA...
CONCORD...ANTIOCH...LIVERMORE...WALNUT CREEK...PLEASANTON...
PITTSBURG...SAN RAMON...BLACKHAWK...SCOTTS VALLEY...
BOULDER CREEK...DAY VALLEY...SAN JOSE...SALINAS...SANTA CRUZ...
WATSONVILLE...LIVE OAK...SEASIDE...MONTEREY...MARINA
225 AM PST MON FEB 6 2017

...WIND ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO 6 AM PST
TUESDAY...

THE NATIONAL WEATHER SERVICE IN SAN FRANCISCO HAS ISSUED A WIND
ADVISORY...WHICH IS IN EFFECT FROM 9 PM THIS EVENING TO 6 AM PST
TUESDAY. 

* TIMING...9 PM THIS EVENING TO 6 AM TUESDAY MORNING

* WINDS...SOUTHERLY WINDS OF 15 TO 30 MPH WITH LOCAL GUSTS TO
  OVER 40 MPH IN LOWER ELEVATION LOCATIONS. GUSTS TO OVER 50 MPH
  FOR HIGHER ELEVATIONS.

* IMPACTS...GUSTY WINDS WILL MAKE DRIVING DIFFICULT...ESPECIALLY 
  FOR DRIVERS OF HIGH PROFILE VEHICLES. SINCE THE SOILS ARE 
  SATURATED...THERE IS A HEIGHTENED POTENTIAL FOR DOWNED TREES 
  AND POWER OUTAGES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND ADVISORY MEANS THAT WINDS OF 35 MPH ARE EXPECTED. WINDS
THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY FOR HIGH
PROFILE VEHICLES. USE EXTRA CAUTION.

&&

$$
3 follow-up statements
176 
WWUS76 KMTR 062243
NPWMTR

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
243 PM PST MON FEB 6 2017


CAZ006-505-507>513-517-518-528>530-071400-
/O.CON.KMTR.WI.Y.0008.170207T0500Z-170207T1400Z/
SAN FRANCISCO-
COASTAL NORTH BAY INCLUDING POINT REYES NATIONAL SEASHORE-
NORTH BAY MOUNTAINS-SAN FRANCISCO BAY SHORELINE-
SAN FRANCISCO PENINSULA COAST-EAST BAY INTERIOR VALLEYS-
EAST BAY HILLS AND THE DIABLO RANGE-SANTA CRUZ MOUNTAINS-
SANTA CLARA VALLEY INCLUDING SAN JOSE-
SANTA LUCIA MOUNTAINS AND LOS PADRES NATIONAL FOREST-
MOUNTAINS OF SAN BENITO COUNTY AND INTERIOR MONTEREY COUNTY
INCLUDING PINNACLES NATIONAL PARK-
NORTHERN SALINAS VALLEY/HOLLISTER VALLEY AND CARMEL VALLEY-
NORTHERN MONTEREY BAY-SOUTHERN MONTEREY BAY AND BIG SUR COAST-
INCLUDING THE CITIES OF...SAN FRANCISCO...TAMALPAIS-HOMESTEAD...
SAUSALITO...ANGWIN...LAGUNITAS-FOREST KNOLLS...WOODACRE...
OAKLAND...FREMONT...HAYWARD...DALY CITY...BERKELEY...PACIFICA...
CONCORD...ANTIOCH...LIVERMORE...WALNUT CREEK...PLEASANTON...
PITTSBURG...SAN RAMON...BLACKHAWK...SCOTTS VALLEY...
BOULDER CREEK...DAY VALLEY...SAN JOSE...SALINAS...SANTA CRUZ...
WATSONVILLE...LIVE OAK...SEASIDE...MONTEREY...MARINA
243 PM PST MON FEB 6 2017

...WIND ADVISORY REMAINS IN EFFECT FROM 9 PM THIS EVENING TO 6 AM
PST TUESDAY...

* TIMING...9 PM THIS EVENING TO 6 AM TUESDAY MORNING

* WINDS...SOUTHERLY WINDS OF 15 TO 30 MPH WITH LOCAL GUSTS TO 
  OVER 40 MPH IN LOWER ELEVATION LOCATIONS. GUSTS TO OVER 50 MPH 
  FOR HIGHER ELEVATIONS. 

* IMPACTS...GUSTY WINDS WILL MAKE DRIVING DIFFICULT...ESPECIALLY 
  FOR DRIVERS OF HIGH PROFILE VEHICLES. SINCE THE SOILS ARE 
  SATURATED...THERE IS A HEIGHTENED POTENTIAL FOR DOWNED TREES 
  AND POWER OUTAGES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND ADVISORY MEANS THAT WINDS OF 35 MPH ARE EXPECTED. WINDS
THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY FOR HIGH
PROFILE VEHICLES. USE EXTRA CAUTION.

&&

$$
276 
WWUS76 KMTR 071224
NPWMTR

URGENT - WEATHER MESSAGE
National Weather Service San Francisco Bay Area
424 AM PST Tue Feb 7 2017

...Gusty Southwest winds continue through midday...

.Another front is moving through the Bay Area this morning with
gusty southwest winds continuing along the coast and in the hills.

CAZ006-505-507>513-517-518-528>530-072030-
/O.EXT.KMTR.WI.Y.0008.000000T0000Z-170207T2100Z/
San Francisco-
Coastal North Bay Including Point Reyes National Seashore-
North Bay Mountains-San Francisco Bay Shoreline-
San Francisco Peninsula Coast-East Bay Interior Valleys-
East Bay Hills and the Diablo Range-Santa Cruz Mountains-
Santa Clara Valley Including San Jose-
Santa Lucia Mountains and Los Padres National Forest-
Mountains Of San Benito County And Interior Monterey County
Including Pinnacles National Park-
Northern Salinas Valley/Hollister Valley and Carmel Valley-
Northern Monterey Bay-Southern Monterey Bay and Big Sur Coast-
Including the cities of...San Francisco...Tamalpais-Homestead...
Sausalito...Angwin...Lagunitas-Forest Knolls...Woodacre...
Oakland...Fremont...Hayward...Daly City...Berkeley...Pacifica...
Concord...Antioch...Livermore...Walnut Creek...Pleasanton...
Pittsburg...San Ramon...Blackhawk...Scotts Valley...
Boulder Creek...Day Valley...San Jose...Salinas...Santa Cruz...
Watsonville...Live Oak...Seaside...Monterey...Marina
424 AM PST Tue Feb 7 2017

...WIND ADVISORY NOW IN EFFECT UNTIL 1 PM PST THIS AFTERNOON...

* TIMING...Until 1 pm Tuesday afternoon

* WINDS...Southerly winds of 15 to 30 mph with local gusts to 45
  mph in lower elevations. Gusts to over 50 mph for the hills
  above 1500 feet.

* IMPACTS...Gusty winds will make driving difficult...especially
  for drivers of high profile vehicles. Since the soils are
  saturated...there is a heightened potential for downed trees and
  power outages.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A wind advisory means that winds of 35 mph are expected. Winds
this strong can make driving difficult...especially for high
profile vehicles. Use extra caution.

&&

$$
431 
WWUS76 KMTR 072048
NPWMTR

URGENT - WEATHER MESSAGE
National Weather Service San Francisco Bay Area
1248 PM PST Tue Feb 7 2017

CAZ006-505-507>513-517-518-528>530-072200-
/O.EXP.KMTR.WI.Y.0008.000000T0000Z-170207T2100Z/
San Francisco-
Coastal North Bay Including Point Reyes National Seashore-
North Bay Mountains-San Francisco Bay Shoreline-
San Francisco Peninsula Coast-East Bay Interior Valleys-
East Bay Hills and the Diablo Range-Santa Cruz Mountains-
Santa Clara Valley Including San Jose-
Santa Lucia Mountains and Los Padres National Forest-
Mountains Of San Benito County And Interior Monterey County
Including Pinnacles National Park-
Northern Salinas Valley/Hollister Valley and Carmel Valley-
Northern Monterey Bay-Southern Monterey Bay and Big Sur Coast-
Including the cities of...San Francisco...Tamalpais-Homestead...
Sausalito...Angwin...Lagunitas-Forest Knolls...Woodacre...
Oakland...Fremont...Hayward...Daly City...Berkeley...Pacifica...
Concord...Antioch...Livermore...Walnut Creek...Pleasanton...
Pittsburg...San Ramon...Blackhawk...Scotts Valley...
Boulder Creek...Day Valley...San Jose...Salinas...Santa Cruz...
Watsonville...Live Oak...Seaside...Monterey...Marina
1248 PM PST Tue Feb 7 2017

...WIND ADVISORY WILL EXPIRE AT 1 PM PST THIS AFTERNOON...

The period of strongest winds has ended as the front is moving
south and east of the region. Gusty southwest winds will continue
to ease through the rest of the afternoon and evening.  

The next strong front is due to arrive Thursday when another round
of strong and damaging winds may be possible.

$$
rww

The office that day

Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 6, 2:11 AM PSTSmall Craft AdvisoryMTR4 days
Feb 6, 9:17 AM PSTFlash Flood WatchMTRMarin, Monterey, Napa, San Mateo, Santa Clara, Santa Cruz and 1 more31 hr
Feb 6, 2:04 PM PSTGale WarningMTR21 hr

Nearby

Wind Advisories in California, 2017Every wind advisory in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.