Alert archive / California / Wind Advisories in 2021
Wind Advisory 15, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this wind advisory at Dec 15, 2021, 7:14 PM PST for 9 counties in California. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Dec 15, 2021, 7:14 PM PST (03:14 UTC)
- Expired
- Dec 16, 2021, 3:09 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, Monterey County, CA, San Mateo County, CA, Santa Clara County, CA, Santa Cruz County, CA, Sonoma County, CA
The radar
The San Francisco radar (KMUX), 48 km from the middle of the area, began a volume at 03:12 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, 3.2 hours before the alert went out and 22 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
- 995 m above ground
- 0-6 km bulk shear
- 80 kt
- 0-1 km storm-relative helicity
- 144 m²/s²
- 0-3 km storm-relative helicity
- 339 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
300 WWUS76 KMTR 160314 NPWMTR URGENT - WEATHER MESSAGE National Weather Service San Francisco Bay Area 714 PM PST Wed Dec 15 2021 CAZ505-507-160800- /O.NEW.KMTR.WI.Y.0015.211216T0314Z-211216T0800Z/ Coastal North Bay Including Point Reyes National Seashore- North Bay Mountains- Including the cities of Tamalpais-Homestead, Sausalito, Angwin, Lagunitas-Forest Knolls, and Woodacre 714 PM PST Wed Dec 15 2021 ...WIND ADVISORY IN EFFECT UNTIL MIDNIGHT PST TONIGHT... * WHAT...Southwest winds 15 to 25 mph with gusts up to 50 mph. * WHERE...Coastal North Bay Including Point Reyes National Seashore and North Bay Mountains. * WHEN...Until midnight PST tonight. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ CAZ006-508-509-512-517-529-530-161115- /O.NEW.KMTR.WI.Y.0015.211216T0314Z-211216T1200Z/ San Francisco-San Francisco Bay Shoreline- San Francisco Peninsula Coast-Santa Cruz Mountains- Santa Lucia Mountains and Los Padres National Forest- Northern Monterey Bay-Southern Monterey Bay and Big Sur Coast- Including the cities of San Francisco, Oakland, Fremont, Hayward, Daly City, Berkeley, Pacifica, Scotts Valley, Boulder Creek, Day Valley, Santa Cruz, Watsonville, Live Oak, Seaside, Monterey, and Marina 714 PM PST Wed Dec 15 2021 ...WIND ADVISORY IN EFFECT UNTIL 4 AM PST THURSDAY... * WHAT...Southwest winds 15 to 25 mph with gusts up to 45 mph. * WHERE...Portions of northern California. * WHEN...Until 4 AM PST Thursday. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ For more information from the National Weather Service visit http://weather.gov/mtr
3 follow-up statements
654 WWUS76 KMTR 160634 NPWMTR URGENT - WEATHER MESSAGE National Weather Service San Francisco Bay Area 1034 PM PST Wed Dec 15 2021 CAZ511-161200- /O.EXA.KMTR.WI.Y.0015.000000T0000Z-211216T1200Z/ East Bay Hills and the Diablo Range- Including the city of Blackhawk 1034 PM PST Wed Dec 15 2021 ...WIND ADVISORY IN EFFECT UNTIL 4 AM PST THURSDAY... * WHAT...Southwest winds 20 to 30 mph with gusts up to 55 mph. * WHERE...East Bay Hills and the Diablo Range. * WHEN...Until 4 AM PST Thursday. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ CAZ505-507-160800- /O.CON.KMTR.WI.Y.0015.000000T0000Z-211216T0800Z/ Coastal North Bay Including Point Reyes National Seashore- North Bay Mountains- Including the cities of Tamalpais-Homestead, Sausalito, Angwin, Lagunitas-Forest Knolls, and Woodacre 1034 PM PST Wed Dec 15 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT PST TONIGHT... * WHAT...Southwest winds 15 to 25 mph with gusts up to 55 mph. * WHERE...Coastal North Bay Including Point Reyes National Seashore and North Bay Mountains. * WHEN...Until midnight PST tonight. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ CAZ006-508-509-512-517-529-530-161200- /O.CON.KMTR.WI.Y.0015.000000T0000Z-211216T1200Z/ San Francisco-San Francisco Bay Shoreline- San Francisco Peninsula Coast-Santa Cruz Mountains- Santa Lucia Mountains and Los Padres National Forest- Northern Monterey Bay-Southern Monterey Bay and Big Sur Coast- Including the cities of San Francisco, Oakland, Fremont, Hayward, Daly City, Berkeley, Pacifica, Scotts Valley, Boulder Creek, Day Valley, Santa Cruz, Watsonville, Live Oak, Seaside, Monterey, and Marina 1034 PM PST Wed Dec 15 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST THURSDAY... * WHAT...Southwest winds 15 to 25 mph with gusts up to 55 mph. * WHERE...Portions of northern California. * WHEN...Until 4 AM PST Thursday. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ For more information from the National Weather Service visit http://weather.gov/mtr
220 WWUS76 KMTR 160754 NPWMTR URGENT - WEATHER MESSAGE National Weather Service San Francisco Bay Area 1154 PM PST Wed Dec 15 2021 CAZ505-507-160900- /O.CAN.KMTR.WI.Y.0015.000000T0000Z-211216T0800Z/ Coastal North Bay Including Point Reyes National Seashore- North Bay Mountains- Including the cities of Tamalpais-Homestead, Sausalito, Angwin, Lagunitas-Forest Knolls, and Woodacre 1154 PM PST Wed Dec 15 2021 ...WIND ADVISORY IS CANCELLED... Winds are decreasing across the area. However a few stronger gusts may persist in the higher elevations over the next hour or so. $$ CAZ006-508-509-511-512-517-529-530-161200- /O.CON.KMTR.WI.Y.0015.000000T0000Z-211216T1200Z/ San Francisco-San Francisco Bay Shoreline- San Francisco Peninsula Coast-East Bay Hills and the Diablo Range- Santa Cruz Mountains- Santa Lucia Mountains and Los Padres National Forest- Northern Monterey Bay-Southern Monterey Bay and Big Sur Coast- Including the cities of San Francisco, Oakland, Fremont, Hayward, Daly City, Berkeley, Pacifica, Blackhawk, Scotts Valley, Boulder Creek, Day Valley, Santa Cruz, Watsonville, Live Oak, Seaside, Monterey, and Marina 1154 PM PST Wed Dec 15 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST THURSDAY... * WHAT...Southwest winds 15 to 25 mph with gusts up to 55 mph. * WHERE...Portions of northern California. * WHEN...Until 4 AM PST Thursday. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ For more information from the National Weather Service visit http://weather.gov/mtr
407 WWUS76 KMTR 161109 NPWMTR URGENT - WEATHER MESSAGE National Weather Service San Francisco Bay Area 309 AM PST Thu Dec 16 2021 CAZ006-508-509-511-512-517-529-530-161215- /O.CAN.KMTR.WI.Y.0015.000000T0000Z-211216T1200Z/ San Francisco-San Francisco Bay Shoreline- San Francisco Peninsula Coast-East Bay Hills and the Diablo Range- Santa Cruz Mountains- Santa Lucia Mountains and Los Padres National Forest- Northern Monterey Bay-Southern Monterey Bay and Big Sur Coast- Including the cities of San Francisco, Oakland, Fremont, Hayward, Daly City, Berkeley, Pacifica, Blackhawk, Scotts Valley, Boulder Creek, Day Valley, Santa Cruz, Watsonville, Live Oak, Seaside, Monterey, and Marina 309 AM PST Thu Dec 16 2021 ...WIND ADVISORY IS CANCELLED... Wind speeds continue to diminish across the region ahead of and in wake of the frontal boundary moving across the Central Coast early this Thursday morning. $$ For more information from the National Weather Service visit http://weather.gov/mtr
The office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 15, 8:47 PM PST | Areal Flood Warning | MTR | Sonoma | 5 hr |
| Dec 15, 9:21 PM PST | Areal Flood Advisory | MTR | Marin, Napa, City and County of San Francisco, Sonoma | 3 hr |
| Dec 15, 10:09 PM PST | Special Marine Warning | MTR | 96 min | |
| Dec 15, 10:43 PM PST | Areal Flood Advisory | MTR | Alameda, Contra Costa, Marin, City and County of San Francisco, San Mateo | 2 hr |
| Dec 15, 11:16 PM PST | Special Marine Warning | MTR | 59 min |
Nearby
Wind Advisories in California, 2021Every wind advisory in 2021
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.