Alert archive / California / Wind Advisories in 2018
Wind Advisory 8, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this wind advisory at Nov 21, 2018, 2:28 PM PST for Marin County, Napa County, Sonoma County, California. It took effect at Nov 22, 2018, 4:00 PM PST. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- Nov 21, 2018, 2:28 PM PST (22:28 UTC)
- In effect from
- Nov 22, 2018, 4:00 PM PST
- Expired
- Nov 22, 2018, 9:23 PM PST
- In force
- 5 hr
- Issued by
- NWS San Francisco Bay Area, CA
Counties Marin County, CA, Napa County, CA, Sonoma County, CA
The radar
The Sacramento radar (KDAX), 88 km from the middle of the area, began a volume at 22:30 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 12:00Z, 10.5 hours before the alert went out and 81 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 861 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 177 m²/s²
- 0-3 km storm-relative helicity
- 225 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
156 WWUS76 KMTR 212228 NPWMTR URGENT - WEATHER MESSAGE National Weather Service San Francisco Bay Area 228 PM PST Wed Nov 21 2018 .A storm system arriving Thanksgiving afternoon will bring gusty southwesterly winds across the North Bay through Friday afternoon. Southwest winds will be locally strongest along the coast and over the higher terrain of the North Bay. In addition, gusty crosswinds will impact the Golden Gate Bridge, Richmond San Rafael Bridge, and Carquinez Bridge, bringing difficult travel for motorists. CAZ505>507-221400- /O.NEW.KMTR.WI.Y.0008.181123T0000Z-181124T0000Z/ Coastal North Bay Including Point Reyes National Seashore- North Bay Interior Valleys-North Bay Mountains- Including the cities of Tamalpais-Homestead, Sausalito, Santa Rosa, South Santa Rosa, Napa, San Rafael, Petaluma, Novato, Rohnert Park, Angwin, Lagunitas-Forest Knolls, and Woodacre 228 PM PST Wed Nov 21 2018 ...WIND ADVISORY IN EFFECT FROM 4 PM THURSDAY TO 4 PM PST FRIDAY... The National Weather Service in San Francisco has issued a Wind Advisory, which is in effect from 4 PM Thursday to 4 PM PST Friday. * WINDS...Southwest winds 15 to 25 mph with gusts 30 to 35 mph for valley locations including most urban towns and cities. Southwest winds 20 to 30 mph with gusts 35 to 50 mph for the Marin and Sonoma coastline as well as interior North Bay elevations above 1000 feet. Locally stronger winds over the highest mountain peaks and ridges across the North Bay. * TIMING... Southwest winds will strengthen across the Northern San Francisco Bay between Thursday afternoon and Friday afternoon. * IMPACTS...Damaging winds may blow down weakened trees and branches. Downed power lines may lead to isolated power outages. Travel will be difficult for high profile vehicles. Unsecured objects will be blown around or knocked over. 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. && $$
3 follow-up statements
216 WWUS76 KMTR 221219 NPWMTR URGENT - WEATHER MESSAGE National Weather Service San Francisco Bay Area 419 AM PST Thu Nov 22 2018 .A storm system arriving Thanksgiving afternoon will bring gusty southwesterly winds across the North Bay through Friday afternoon. Southwest winds will be locally strongest along the coast and over the higher terrain of the North Bay. In addition, gusty crosswinds will impact the Golden Gate Bridge, Richmond San Rafael Bridge, and Carquinez Bridge, bringing difficult travel for motorists. CAZ505>507-230000- /O.CON.KMTR.WI.Y.0008.181123T0000Z-181124T0000Z/ Coastal North Bay Including Point Reyes National Seashore- North Bay Interior Valleys-North Bay Mountains- Including the cities of Tamalpais-Homestead, Sausalito, Santa Rosa, South Santa Rosa, Napa, San Rafael, Petaluma, Novato, Rohnert Park, Angwin, Lagunitas-Forest Knolls, and Woodacre 419 AM PST Thu Nov 22 2018 ...WIND ADVISORY REMAINS IN EFFECT FROM 4 PM THIS AFTERNOON TO 4 PM PST FRIDAY... * WINDS...Southwest winds 15 to 25 mph with gusts 30 to 35 mph for valley locations including most urban towns and cities. Southwest winds 20 to 30 mph with gusts 35 to 50 mph for the Marin and Sonoma coastline as well as interior North Bay elevations above 1000 feet. Locally stronger winds over the highest mountain peaks and ridges across the North Bay. * TIMING... Southwest winds will strengthen across the Northern San Francisco Bay between Thursday afternoon and Friday afternoon. * IMPACTS...Damaging winds may blow down weakened trees and branches. Downed power lines may lead to isolated power outages. Travel will be difficult for high profile vehicles. Unsecured objects will be blown around or knocked over. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Wind Advisory means that winds of 35 mph are expected. Winds this strong can make driving difficult...especially for high profile vehicles. Use extra caution. && $$
318 WWUS76 KMTR 222352 NPWMTR URGENT - WEATHER MESSAGE National Weather Service San Francisco Bay Area 352 PM PST Thu Nov 22 2018 .A storm system arriving in the North Bay Thanksgiving afternoon will bring gusty southwesterly winds to portions of the North Bay from late Thursday afternoon through Friday afternoon. Southwest winds will be strongest along the coast and over the higher terrain of the North Bay. In addition, gusty crosswinds will impact the Golden Gate Bridge, Richmond San Rafael Bridge, and Carquinez Bridge, resulting in difficult travel for motorists. CAZ506-230100- /O.CAN.KMTR.WI.Y.0008.181123T0000Z-181124T0000Z/ North Bay Interior Valleys- Including the cities of Santa Rosa, South Santa Rosa, Napa, San Rafael, Petaluma, Novato, and Rohnert Park 352 PM PST Thu Nov 22 2018 ...WIND ADVISORY IS CANCELLED... The National Weather Service San Francisco Bay Area has cancelled the Wind Advisory for the North Bay Valleys. Winds are not expected to reach advisory levels in the valleys. $$ CAZ505-507-231400- /O.CON.KMTR.WI.Y.0008.181123T0000Z-181124T0000Z/ Coastal North Bay Including Point Reyes National Seashore- North Bay Mountains- Including the cities of Tamalpais-Homestead, Sausalito, Angwin, Lagunitas-Forest Knolls, and Woodacre 352 PM PST Thu Nov 22 2018 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST FRIDAY... * WINDS...Southwest winds 15 to 30 mph with gusts 35 to 45 mph for the Marin and Sonoma County coastlines as well as the North Bay Mountains. Locally stronger gusts are possible over the highest mountain peaks and ridges in the North Bay. * TIMING... Southwest winds will strengthen across the North Bay late Thursday afternoon and then remain locally strong and gusty through Friday afternoon. * IMPACTS...Winds may topple dead or diseased trees. Downed power lines may lead to isolated power outages. Travel will be difficult for high profile vehicles. Unsecured objects will be blown around or knocked over. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Wind Advisory means that wind gusts of at least 45 mph are expected. Winds this strong can make driving difficult...especially for high profile vehicles. Use extra caution. && $$
880 WWUS76 KMTR 230523 NPWMTR URGENT - WEATHER MESSAGE National Weather Service San Francisco Bay Area 923 PM PST Thu Nov 22 2018 CAZ505-507-230630- /O.CAN.KMTR.WI.Y.0008.000000T0000Z-181124T0000Z/ Coastal North Bay Including Point Reyes National Seashore- North Bay Mountains- Including the cities of Tamalpais-Homestead, Sausalito, Angwin, Lagunitas-Forest Knolls, and Woodacre 923 PM PST Thu Nov 22 2018 ...WIND ADVISORY IS CANCELLED... The National Weather Service San Francisco Bay Area has cancelled the Wind Advisory for Coastal North Bay and the North Bay Mountains. Southwest winds peaked in intensity early on Thursday evening and have since begun to subside. Although gusty winds will continue across the North Bay through Friday, winds are no longer expected to reach advisory levels, except perhaps at a few isolated higher peaks. Therefore, the Wind Advisory for the North Bay Mountains and Coastal North Bay has been cancelled. $$
The office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 21, 3:09 PM PST | Gale Warning | MTR | 29 hr | |
| Nov 21, 3:09 PM PST | Small Craft Advisory | MTR | 48 hr |
Nearby
Wind Advisories in California, 2018Every wind advisory in 2018
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.