Alert archive / California / Wind Advisories in 2005

Wind Advisory 7, NWS San Francisco Bay Area, CA

December 20, 2005Marin County, Sonoma County, California

NWS San Francisco Bay Area, CA issued this wind advisory at Dec 20, 2005, 2:52 AM PST for Marin County, Sonoma County, California. It took effect at Dec 20, 2005, 3:00 AM PST. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued
Dec 20, 2005, 2:52 AM PST (10:52 UTC)
In effect from
Dec 20, 2005, 3:00 AM PST
Expired
Dec 20, 2005, 12:00 PM PST
In force
9 hr
Issued by
NWS San Francisco Bay Area, CA

Counties Marin County, CA, Sonoma County, CA

The radar

The Sacramento radar (KDAX), 104 km from the middle of the area, began a volume at 10:53 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, 10.9 hours before the alert went out and 84 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 2005-12-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2005-12-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 113 square meters per square second.193958Sfc1 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
1261 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
113 m²/s²
0-3 km storm-relative helicity
287 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.

000 
WWUS76 KMTR 201052
NPWMTR

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
252 AM PST TUE DEC 20 2005

...WIND ADVISORY FOR THE NORTH BAY COAST AND MOUNTAINS UNTIL NOON
TODAY... 

.A VIGOROUS STORM SYSTEM APPROACHING THE NORTHERN CALIFORNIA THIS
MORNING WILL PRODUCE GUSTY WINDS ALONG THE COAST AND HILLS OF THE
NORTH BAY THIS MORNING.

CAZ505-507-202000-
/O.NEW.KMTR.WI.Y.0007.051220T1100Z-051220T2000Z/
COASTAL NORTH BAY...INCLUDING POINT REYES NATIONAL SEASHORE-
NORTH BAY MOUNTAINS-
252 AM PST TUE DEC 20 2005

...WIND ADVISORY IN EFFECT UNTIL NOON PST TODAY...

THE NATIONAL WEATHER SERVICE IN SAN FRANCISCO HAS ISSUED A WIND
ADVISORY...WHICH IS IN EFFECT UNTIL NOON PST TODAY. 

SOUTHEASTERLY WINDS WILL INCREASE RAPIDLY THIS MORNING AS A
VIGOROUS FRONTAL SYSTEM APPROACHES THE DISTRICT. SUSTAINED WINDS
AS HIGH AS 35 MPH WITH GUSTS TO 50 MPH CAN BE EXPECTED WITH THIS
SYSTEM. WINDS WILL DECREASE THIS AFTERNOON AS THE FRONT MOVES EAST
OF THE REGION.

A WIND ADVISORY MEANS THAT WINDS ARE OR WILL SOON BE IN EXCESS OF
35 MPH WITH FREQUENT GUSTS GREATER THAN 45 MPH. MOTORISTS IN THE
ADVISORY AREA SHOULD BE PREPARED FOR SUDDEN GUSTY CROSS WINDS.

$$

KENNEDY
1 follow-up statement
000 
WWUS76 KMTR 201959
NPWMTR

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
1159 AM PST TUE DEC 20 2005


CAZ505-507-202100-
/O.EXP.KMTR.WI.Y.0007.000000T0000Z-051220T2000Z/
COASTAL NORTH BAY...INCLUDING POINT REYES NATIONAL SEASHORE-
NORTH BAY MOUNTAINS-
1159 AM PST TUE DEC 20 2005

...WIND ADVISORY WILL EXPIRE AT NOON PST TODAY...

THE WIND ADVISORY WILL EXPIRE AT NOON PST TODAY AS WINDS HAVE
DECREASED OVER THE NORTH BAY.

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 20, 6:22 AM PSTMarine Weather StatementMTR3 hr
Dec 20, 7:37 AM PSTSpecial Marine WarningMTR53 min

Nearby

Wind Advisories in California, 2005Every wind advisory in 2005

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.