Alert archive / California / Wind Advisories in 2011

Wind Advisory 2, NWS San Francisco Bay Area, CA

February 15, 20119 counties in California

NWS San Francisco Bay Area, CA issued this wind advisory at Feb 15, 2011, 5:22 PM PST for 9 counties in California. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued
Feb 15, 2011, 5:22 PM PST (01:22 UTC)
Expired
Feb 16, 2011, 1:00 AM PST
In force
8 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, Napa County, CA, San Mateo County, CA, Santa Clara County, CA, Santa Cruz County, CA, Sonoma County, CA

The radar

The San Francisco radar (KMUX), 78 km from the middle of the area, began a volume at 01:22 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, 1.4 hours before the alert went out and 9 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 2011-02-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 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 2011-02-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 126 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1236 m above ground
0-6 km bulk shear
66 kt
0-1 km storm-relative helicity
126 m²/s²
0-3 km storm-relative helicity
221 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

015 
WWUS76 KMTR 160122
NPWMTR

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
522 PM PST TUE FEB 15 2011

...STRONG AND GUSTY SOUTHEAST WINDS UNTIL 1 AM PST EARLY WEDNESDAY MORNING...

CAZ006-505>512-529-160900-
/O.NEW.KMTR.WI.Y.0002.110216T0122Z-110216T0900Z/
SAN FRANCISCO-
COASTAL NORTH BAY...INCLUDING POINT REYES NATIONAL SEASHORE-
NORTH BAY INTERIOR VALLEYS-NORTH BAY MOUNTAINS-
SAN FRANCISCO BAY SHORELINE-SAN FRANCISCO PENINSULA COAST-
EAST BAY INTERIOR VALLEYS-EAST BAY HILLS AND DIABLO RANGE-
SANTA CRUZ MOUNTAINS-NORTHERN MONTEREY BAY-
522 PM PST TUE FEB 15 2011

...WIND ADVISORY IN EFFECT UNTIL 1 AM PST WEDNESDAY...

A STRONG COLD FRONT WILL SLIDE SOUTHEAST ACROSS THE BAY AREA THIS
EVENING WITH HEAVY WINDS AND RAIN.

* TIMING: STRONG AND GUSTY WINDS UNTIL 1 AM PST EARLY WEDNESDAY
  MORNING.

* WINDS: SOUTHEAST WINDS 35 TO 45 MPH WITH GUSTS TO 50 MPH
  POSSIBLE.

* IMPACTS: STRONG GUSTY WINDS WILL MAKE DRIVING HIGH PROFILE
  VEHICLES DIFFICULT. IN ADDITION...WINDS OF THIS STRENGTH ALONG
  WITH HEAVY DOWNPOURS CAN BRING DOWN LARGE TREES...POWER LINES
  AND WEAKENED TREE LIMBS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND ADVISORY MEANS THAT WINDS OF 35 TO 45 MPH ARE EXPECTED.
WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY FOR HIGH
PROFILE VEHICLES. USE EXTRA CAUTION.

&&

$$

CANEPA
1 follow-up statement
666 
WWUS76 KMTR 160859
NPWMTR

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
1259 AM PST WED FEB 16 2011


CAZ006-505>512-529-161000-
/O.EXP.KMTR.WI.Y.0002.000000T0000Z-110216T0900Z/
SAN FRANCISCO-
COASTAL NORTH BAY...INCLUDING POINT REYES NATIONAL SEASHORE-
NORTH BAY INTERIOR VALLEYS-NORTH BAY MOUNTAINS-
SAN FRANCISCO BAY SHORELINE-SAN FRANCISCO PENINSULA COAST-
EAST BAY INTERIOR VALLEYS-EAST BAY HILLS AND DIABLO RANGE-
SANTA CRUZ MOUNTAINS-NORTHERN MONTEREY BAY-
1259 AM PST WED FEB 16 2011

...WIND ADVISORY WILL EXPIRE AT 1 AM PST EARLY THIS MORNING...

THE WIND ADVISORY FOR THE GREATER SAN FRANCISCO BAY AREA WILL
EXPIRE AT 1 AM PST. WIND SPEEDS WITH THE PASSING COLD FRONT HAVE
STARTED TO DECREASE...ALTHOUGH LOCALLY GUSTY WINDS ARE EXPECTED TO
CONTINUE THROUGH THE NIGHT.

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 15, 5:41 PM PSTHigh Surf AdvisoryMTRMarin, Monterey, City and County of San Francisco, San Mateo, Santa Cruz, Sonoma20 hr

Nearby

Wind Advisories in California, 2011Every wind advisory in 2011

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.