Alert archive / California / Wind Advisories in 2017
Wind Advisory 18, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this wind advisory at Oct 6, 2017, 12:44 PM PDT for 5 counties in California. It took effect at Oct 8, 2017, 7:00 PM PDT. It was in force for 14 hr.
The area
The counties it named.
The facts
- Issued
- Oct 6, 2017, 12:44 PM PDT (19:44 UTC)
- In effect from
- Oct 8, 2017, 7:00 PM PDT
- Expired
- Oct 9, 2017, 9:06 AM PDT
- In force
- 14 hr
- Issued by
- NWS San Francisco Bay Area, CA
Counties Alameda County, CA, Contra Costa County, CA, Marin County, CA, Napa County, CA, Sonoma County, CA
The radar
The Sacramento radar (KDAX), 73 km from the middle of the area, began a volume at 19:50 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, 7.7 hours before the alert went out and 47 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
- 2597 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 9 m²/s²
- 0-3 km storm-relative helicity
- 2 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
242 WWUS76 KMTR 061944 NPWMTR URGENT - WEATHER MESSAGE National Weather Service San Francisco Bay Area 1244 PM PDT Fri Oct 6 2017 CAZ506-507-510-071200- /O.NEW.KMTR.WI.Y.0018.171009T0200Z-171009T1800Z/ North Bay Interior Valleys-North Bay Mountains- East Bay Interior Valleys- Including the cities of Santa Rosa, South Santa Rosa, Napa, San Rafael, Petaluma, Novato, Rohnert Park, Angwin, Lagunitas-Forest Knolls, Woodacre, Concord, Antioch, Livermore, Walnut Creek, Pleasanton, Pittsburg, and San Ramon 1244 PM PDT Fri Oct 6 2017 ...WIND ADVISORY IN EFFECT FROM 7 PM SUNDAY TO 11 AM PDT MONDAY... The National Weather Service in San Francisco has issued a Wind Advisory, which is in effect from 7 PM Sunday to 11 AM PDT Monday. Gusty northerly winds can be expected during this time over much of the North Bay plus the East Bay Hills. Winds will increase through Sunday evening into the overnight hours with local gusts over 55 mph possible at higher elevation locations. For lower elevation areas including the North Bay Valley communities, local gusts over 40 mph are possible. 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. Winds this strong can also bring down branches. && $$
5 follow-up statements
327 WWUS76 KMTR 071146 NPWMTR URGENT - WEATHER MESSAGE National Weather Service San Francisco Bay Area 446 AM PDT Sat Oct 7 2017 CAZ506-507-510-072300- /O.CON.KMTR.WI.Y.0018.171009T0200Z-171009T1800Z/ North Bay Interior Valleys-North Bay Mountains- East Bay Interior Valleys- Including the cities of Santa Rosa, South Santa Rosa, Napa, San Rafael, Petaluma, Novato, Rohnert Park, Angwin, Lagunitas-Forest Knolls, Woodacre, Concord, Antioch, Livermore, Walnut Creek, Pleasanton, Pittsburg, and San Ramon 446 AM PDT Sat Oct 7 2017 ...WIND ADVISORY REMAINS IN EFFECT FROM 7 PM SUNDAY TO 11 AM PDT MONDAY... a Wind Advisory remains in effect from 7 PM Sunday to 11 AM PDT Monday. Gusty northerly winds can be expected during this time over much of the North Bay plus the East Bay Hills. Winds will increase through Sunday evening into the overnight hours with local gusts over 55 mph possible at higher elevation locations. For lower elevation areas including the North Bay Valley communities, local gusts over 40 mph are possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Wind Advisory means that winds of 35 mph are expected. Winds this strong can make driving difficult...especially for high profile vehicles. Use extra caution. Winds this strong can also bring down branches. && $$
766 WWUS76 KMTR 072237 NPWMTR URGENT - WEATHER MESSAGE National Weather Service San Francisco Bay Area 337 PM PDT Sat Oct 7 2017 ...Windy conditions expected across portions of the San Francisco Bay Area late Sunday through early Monday... .A classic autumn offshore wind event is forecast to develop later this weekend. North to northeast winds will increase late Sunday and peak in intensity on Sunday night and early Monday before gradually decreasing late Monday morning and Monday afternoon. Strongest winds are expected across the North Bay Mountains where gusts as high as 55 mph are possible. Windy conditions are also expected in the East Bay Hills with gusts to 50 mph likely. In addition, locally windy conditions will develop in the North and East Bay Valleys where wind gusts as high as 45 mph are possible. CAZ511-081300- /O.EXA.KMTR.WI.Y.0018.171009T0200Z-171009T1800Z/ East Bay Hills and the Diablo Range- Including the city of Blackhawk 337 PM PDT Sat Oct 7 2017 ...WIND ADVISORY IN EFFECT FROM 7 PM SUNDAY TO 11 AM PDT MONDAY... The National Weather Service San Francisco Bay Area has issued a Wind Advisory, which is in effect from 7 PM Sunday to 11 AM PDT Monday. Gusty northerly winds can be expected from late Sunday through early Monday over much of the East Bay. Winds will increase late Sunday and Sunday night with local gusts up to 45 mph likely. Winds are forecast to gradually decrease on Monday. 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. Winds this strong can also bring down weakened trees and powerlines. Power outages are possible. && $$ CAZ506-507-510-081300- /O.CON.KMTR.WI.Y.0018.171009T0200Z-171009T1800Z/ North Bay Interior Valleys-North Bay Mountains- East Bay Interior Valleys- Including the cities of Santa Rosa, South Santa Rosa, Napa, San Rafael, Petaluma, Novato, Rohnert Park, Angwin, Lagunitas-Forest Knolls, Woodacre, Concord, Antioch, Livermore, Walnut Creek, Pleasanton, Pittsburg, and San Ramon 337 PM PDT Sat Oct 7 2017 ...WIND ADVISORY REMAINS IN EFFECT FROM 7 PM SUNDAY TO 11 AM PDT MONDAY... A Wind Advisory remains in effect from 7 PM Sunday to 11 AM PDT Monday. Strong and gusty northerly winds can be expected from late Sunday through early Monday over much of the North and East Bay. Winds will increase late Sunday and Sunday night with local gusts up to 55 mph possible at higher elevation locations of the North Bay. Elsewhere, wind gusts up to 45 mph are possible. Winds are forecast to gradually decrease on Monday. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Wind Advisory means that wind gusts of at least 45 mph are expected. Winds this strong can make driving difficult...especially for high profile vehicles. Use extra caution. Winds this strong can also bring down weakened trees and powerlines. Power outages are possible. && $$
198 WWUS76 KMTR 081211 NPWMTR URGENT - WEATHER MESSAGE National Weather Service San Francisco Bay Area 511 AM PDT Sun Oct 8 2017 ...Windy conditions expected across portions of the San Francisco Bay Area late Today through early Monday... .A classic autumn offshore wind event is forecast to develop by late today. North to northeast winds will increase this afternoon and evening and reach peak intensity tonight and early Monday. Strongest winds are forecast across the North Bay Mountains. Windy conditions are also expected in the East Bay Hills and Valleys and North Bay Valleys. Winds will decrease in all areas by midday Monday. CAZ506-507-510-511-090100- /O.CON.KMTR.WI.Y.0018.171009T0200Z-171009T1800Z/ North Bay Interior Valleys-North Bay Mountains- East Bay Interior Valleys-East Bay Hills and the Diablo Range- Including the cities of Santa Rosa, South Santa Rosa, Napa, San Rafael, Petaluma, Novato, Rohnert Park, Angwin, Lagunitas-Forest Knolls, Woodacre, Concord, Antioch, Livermore, Walnut Creek, Pleasanton, Pittsburg, San Ramon, and Blackhawk 511 AM PDT Sun Oct 8 2017 ...WIND ADVISORY REMAINS IN EFFECT FROM 7 PM THIS EVENING TO 11 AM PDT MONDAY... A Wind Advisory remains in effect from 7 PM this evening to 11 AM PDT Monday. Strong and gusty northerly winds can be expected from late Sunday through early Monday over much of the North and East Bay. Winds will increase this afternoon and evening, and wind gusts in excess of 50 mph are possible in the hills of the North Bay by tonight. Elsewhere, wind gusts of between 30 and 45 mph are likely. Winds are forecast to gradually decrease on Monday. 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. Winds this strong can also bring down weakened trees and powerlines. Power outages are possible. && $$
860 WWUS76 KMTR 082335 NPWMTR URGENT - WEATHER MESSAGE National Weather Service San Francisco Bay Area 435 PM PDT Sun Oct 8 2017 ...Windy conditions expected across portions of the San Francisco Bay Area through early Monday... .A strong offshore wind event is developing and will last through early Monday. North to northeast winds will increase this afternoon and evening and reach peak intensity tonight and early Monday. Strongest winds are forecast across the North Bay Mountains. Windy conditions are also expected in the East Bay Hills and Valleys and North Bay Valleys. Winds will decrease in all areas by midday Monday. CAZ506-507-510-511-091600- /O.CON.KMTR.WI.Y.0018.171009T0200Z-171009T1800Z/ North Bay Interior Valleys-North Bay Mountains- East Bay Interior Valleys-East Bay Hills and the Diablo Range- Including the cities of Santa Rosa, South Santa Rosa, Napa, San Rafael, Petaluma, Novato, Rohnert Park, Angwin, Lagunitas-Forest Knolls, Woodacre, Concord, Antioch, Livermore, Walnut Creek, Pleasanton, Pittsburg, San Ramon, and Blackhawk 435 PM PDT Sun Oct 8 2017 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 11 AM PDT MONDAY... a Wind Advisory remains in effect until 11 AM PDT Monday. A strong offshore wind event is developing which will result in strong and gusty northerly to northeasterly winds through early Monday over much of the North and East Bay. Winds will increase this afternoon and evening, and wind gusts in excess of 50 mph are expected in the hills of the North Bay by tonight. Elsewhere, wind gusts of between 30 and 45 mph are likely. Winds are forecast to gradually decrease on Monday. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Wind Advisory means that wind gusts of at least 45 mph are expected. Winds this strong can make driving difficult... especially for high profile vehicles. Use extra caution. Winds this strong can also bring down weakened trees and powerlines. Power outages are possible. && $$
754 WWUS76 KMTR 091606 NPWMTR URGENT - WEATHER MESSAGE National Weather Service San Francisco Bay Area 906 AM PDT Mon Oct 9 2017 CAZ506-507-510-511-091715- /O.CAN.KMTR.WI.Y.0018.000000T0000Z-171009T1800Z/ North Bay Interior Valleys-North Bay Mountains- East Bay Interior Valleys-East Bay Hills and the Diablo Range- Including the cities of Santa Rosa, South Santa Rosa, Napa, San Rafael, Petaluma, Novato, Rohnert Park, Angwin, Lagunitas-Forest Knolls, Woodacre, Concord, Antioch, Livermore, Walnut Creek, Pleasanton, Pittsburg, San Ramon, and Blackhawk 906 AM PDT Mon Oct 9 2017 ...WIND ADVISORY IS CANCELLED... The National Weather Service in San Francisco has cancelled the Wind Advisory. Wind speeds have fallen below advisory criteria this morning allowing the Wind Advisory to be cancelled. While winds have diminished, breezy conditions with locally gusty winds will remain possible through the morning and early afternoon. $$
The office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 5, 9:03 PM PDT | Small Craft Advisory | MTR | 3 days | |
| Oct 6, 2:40 AM PDT | Small Craft Advisory | MTR | 3 days | |
| Oct 6, 9:49 AM PDT | Red Flag Warning | MTR | Alameda, Contra Costa, Marin, Napa, San Mateo, Santa Clara and 2 more | 4 days |
| Oct 6, 1:53 PM PDT | Gale Warning | MTR | 55 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.