Alert archive / California / Red Flag Warnings in 2024
Red Flag Warning 6, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this red flag warning at Oct 15, 2024, 9:46 AM PDT for 11 counties in California. It took effect at Oct 17, 2024, 11:00 PM PDT. It was in force for 42 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Oct 15, 2024, 9:46 AM PDT (16:46 UTC)
- In effect from
- Oct 17, 2024, 11:00 PM PDT
- Expired
- Oct 19, 2024, 5:00 PM PDT
- In force
- 42 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, Napa County, CA, San Benito County, CA, San Mateo County, CA, Santa Clara County, CA, Santa Cruz County, CA, Sonoma County, CA
The radar
The San Francisco radar (KMUX), 46 km from the middle of the area, began a volume at 16:50 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, 4.8 hours before the alert went out and 24 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
- 1031 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 21 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
472 WWUS86 KMTR 151646 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 946 AM PDT Tue Oct 15 2024 ...RED FLAG WARNING NOW IN EFFECT THURSDAY NIGHT THROUGH SATURDAY EVENING FOR THE BAY AREA AND CENTRAL COAST AS STRONG OFFSHORE WINDS AND CRITICALLY DRY CONDITIONS ARE EXPECTED TO DEVELOP... .Gusty north-northeast winds are expected to develop as an "inside slider" system moves into the Great Basin this weekend. Humidities will still be on the higher end at the start of the event on Thursday, but are expected to quickly dry out as low as 10% Friday and Saturday. Peak winds are expected overnight Thursday night into Friday morning for the North Bay and Bay Area. Most areas across the region will be affected to some degree, with likely exceptions being the immediate Big Sur coast, Monterey Bay coast, and the Marin/Sonoma coast. Winds largely on the order of 25-35 mph can be expected with gusts to 45 mph...isolated gusts to 65 mph across the highest terrain and ridgetops, most notably the North Bay Interior Mountains and the Diablo Range. CAZ006-502>504-506-508>510-512>515-160500- /O.UPG.KMTR.FW.A.0003.241017T1800Z-241020T0300Z/ /O.NEW.KMTR.FW.W.0006.241018T0600Z-241020T0000Z/ San Francisco-Marin Coastal Range-Sonoma Coastal Range- North Bay Interior Mountains-North Bay Interior Valleys- San Francisco Bay Shoreline-San Francisco Peninsula Coast- East Bay Interior Valleys-Santa Cruz Mountains- Santa Clara Valley Including San Jose-Eastern Santa Clara Hills- East Bay Hills- 946 AM PDT Tue Oct 15 2024 ...RED FLAG WARNING IN EFFECT FROM 11 PM THURSDAY TO 5 PM PDT SATURDAY FOR STRONG OFFSHORE WINDS AND CRITICALLY DRY CONDITIONS FOR ALL INTERIOR BAY AREA ZONES, AS WELL AS THE CITY OF SAN FRANCISCO, THE SAN FRANCISCO PENINSULA COAST, AND THE BAY SHORELINE... * AFFECTED AREA...Fire Weather Zone 006 San Francisco, Fire Weather Zone 502 Marin Coastal Range, Fire Weather Zone 503 Sonoma Coastal Range, Fire Weather Zone 504 North Bay Interior Mountains, Fire Weather Zone 506 North Bay Interior Valleys, Fire Weather Zone 508 San Francisco Bay Shoreline, Fire Weather Zone 509 San Francisco Peninsula Coast, Fire Weather Zone 510 East Bay Interior Valleys, Fire Weather Zone 512 Santa Cruz Mountains, Fire Weather Zone 513 Santa Clara Valley Including San Jose, Fire Weather Zone 514 Eastern Santa Clara Hills and Fire Weather Zone 515 East Bay Hills. * TIMING...11 PM Thursday until 5 PM Saturday * WINDS...North and northeast 20 to 30 mph with gusts up to 45 mph. Potential for gusts up to 65 mph along ridgetops and the highest terrain. * RELATIVE HUMIDITY...As low as 10 percent. * LIGHTNING...None. * IMPACTS...The combination of gusty winds and low humidity can cause fire to rapidly grow in size and intensity. Outdoor burning is not recommended. Despite recent cool weather and high humidity, we are expecting a widespread and prolonged offshore wind event which will likely dry fuels out very quickly given their volatility over the past several weeks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ CAZ516>518-528-160500- /O.UPG.KMTR.FW.A.0003.241017T1800Z-241020T0300Z/ /O.NEW.KMTR.FW.W.0006.241018T0600Z-241020T0000Z/ Southern Salinas Valley/Arroyo Seco and Lake San Antonio- Santa Lucia Mountains and Los Padres National Forest- Mountains of San Benito County And Interior Monterey County including Pinnacles National Park- Northern Salinas Valley/Hollister Valley and Carmel Valley- 946 AM PDT Tue Oct 15 2024 ...RED FLAG WARNING IN EFFECT FROM 11 PM THURSDAY TO 5 PM PDT SATURDAY FOR STRONG OFFSHORE WINDS FOR THE INTERIOR CENTRAL COAST... * AFFECTED AREA...Fire Weather Zone 516 Southern Salinas Valley/Arroyo Seco and Lake San Antonio, Fire Weather Zone 517 Santa Lucia Mountains and Los Padres National Forest, Fire Weather Zone 518 Mountains of San Benito County And Interior Monterey County including Pinnacles National Park and Fire Weather Zone 528 Northern Salinas Valley/Hollister Valley and Carmel Valley. * TIMING...11 PM Thursday until 5 PM Saturday * WINDS...Northwest 20 to 30 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...As low as 15 percent. * LIGHTNING...None. * IMPACTS...The combination of gusty winds and low humidity can cause fire to rapidly grow in size and intensity. Outdoor burning is not recommended. Despite recent cool weather and high humidity, we are expecting a widespread and prolonged offshore wind event which will likely dry fuels out very quickly given their volatility over the past several weeks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
11 follow-up statements
932 WWUS86 KMTR 160344 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 844 PM PDT Tue Oct 15 2024 ...RED FLAG WARNING NOW IN EFFECT THURSDAY NIGHT THROUGH SATURDAY EVENING FOR THE BAY AREA AND CENTRAL COAST AS STRONG OFFSHORE WINDS AND CRITICALLY DRY CONDITIONS ARE EXPECTED TO DEVELOP... .Gusty north-northeast winds are expected to develop as an "inside slider" system moves into the Great Basin this weekend. Humidities will still be on the higher end at the start of the event on Thursday, but are expected to quickly dry out as low as 10% Friday and Saturday. Peak winds are expected overnight Thursday night into Friday morning for the North Bay and Bay Area. Most areas across the region will be affected to some degree, with likely exceptions being the immediate Big Sur coast, Monterey Bay coast, and the Marin/Sonoma coast. Winds largely on the order of 25-35 mph can be expected with gusts to 45 mph... isolated gusts to 65 mph across the highest terrain and ridgetops, most notably the North Bay Interior Mountains and the Diablo Range. CAZ006-502>504-506-508>510-512>515-161300- /O.CON.KMTR.FW.W.0006.241018T0600Z-241020T0000Z/ San Francisco-Marin Coastal Range-Sonoma Coastal Range- North Bay Interior Mountains-North Bay Interior Valleys- San Francisco Bay Shoreline-San Francisco Peninsula Coast- East Bay Interior Valleys-Santa Cruz Mountains- Santa Clara Valley Including San Jose-Eastern Santa Clara Hills- East Bay Hills- 844 PM PDT Tue Oct 15 2024 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 PM THURSDAY TO 5 PM PDT SATURDAY FOR STRONG OFFSHORE WINDS AND CRITICALLY DRY CONDITIONS FOR ALL INTERIOR BAY AREA ZONES, AS WELL AS THE CITY OF SAN FRANCISCO, THE SAN FRANCISCO PENINSULA COAST, AND THE BAY SHORELINE... * AFFECTED AREA...Fire Weather Zone 006 San Francisco, Fire Weather Zone 502 Marin Coastal Range, Fire Weather Zone 503 Sonoma Coastal Range, Fire Weather Zone 504 North Bay Interior Mountains, Fire Weather Zone 506 North Bay Interior Valleys, Fire Weather Zone 508 San Francisco Bay Shoreline, Fire Weather Zone 509 San Francisco Peninsula Coast, Fire Weather Zone 510 East Bay Interior Valleys, Fire Weather Zone 512 Santa Cruz Mountains, Fire Weather Zone 513 Santa Clara Valley Including San Jose, Fire Weather Zone 514 Eastern Santa Clara Hills and Fire Weather Zone 515 East Bay Hills. * TIMING...11 PM Thursday until 5 PM Saturday * WINDS...North 10 to 20 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...As low as 12 percent. * LIGHTNING...None. * IMPACTS...The combination of gusty winds and low humidity can cause fire to rapidly grow in size and intensity. Outdoor burning is not recommended. Despite recent cool weather and high humidity, we are expecting a widespread and prolonged offshore wind event which will likely dry fuels out very quickly given their volatility over the past several weeks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ CAZ516>518-528-161300- /O.CON.KMTR.FW.W.0006.241018T0600Z-241020T0000Z/ Southern Salinas Valley/Arroyo Seco and Lake San Antonio- Santa Lucia Mountains and Los Padres National Forest- Mountains of San Benito County And Interior Monterey County including Pinnacles National Park- Northern Salinas Valley/Hollister Valley and Carmel Valley- 844 PM PDT Tue Oct 15 2024 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 PM THURSDAY TO 5 PM PDT SATURDAY FOR STRONG OFFSHORE WINDS FOR THE INTERIOR CENTRAL COAST... * AFFECTED AREA...Fire Weather Zone 516 Southern Salinas Valley/Arroyo Seco and Lake San Antonio, Fire Weather Zone 517 Santa Lucia Mountains and Los Padres National Forest, Fire Weather Zone 518 Mountains of San Benito County And Interior Monterey County including Pinnacles National Park and Fire Weather Zone 528 Northern Salinas Valley/Hollister Valley and Carmel Valley. * TIMING...11 PM Thursday until 5 PM Saturday * WINDS...North 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 14 percent. * LIGHTNING...None. * IMPACTS...The combination of gusty winds and low humidity can cause fire to rapidly grow in size and intensity. Outdoor burning is not recommended. Despite recent cool weather and high humidity, we are expecting a widespread and prolonged offshore wind event which will likely dry fuels out very quickly given their volatility over the past several weeks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
762 WWUS86 KMTR 161230 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 530 AM PDT Wed Oct 16 2024 ...RED FLAG WARNING NOW IN EFFECT THURSDAY NIGHT THROUGH SATURDAY EVENING FOR THE BAY AREA AND CENTRAL COAST AS STRONG OFFSHORE WINDS AND CRITICALLY DRY CONDITIONS ARE EXPECTED TO DEVELOP... .Gusty north-northeast winds are expected to develop as an "inside slider" system moves into the Great Basin this weekend. Humidities will still be on the higher end at the start of the event on Thursday, but are expected to quickly dry out as low as 10% Friday and Saturday. Peak winds are expected overnight Thursday night into Friday morning for the North Bay and Bay Area. Most areas across the region will be affected to some degree, with likely exceptions being the immediate Big Sur coast, Monterey Bay coast, and the Marin/Sonoma coast. Winds largely on the order of 25-35 mph can be expected with gusts to 50 mph... isolated gusts to 65 mph across the highest terrain and ridgetops, most notably the North Bay Interior Mountains and the Diablo Range. CAZ006-502>504-506-508>510-512>515-162030- /O.CON.KMTR.FW.W.0006.241018T0600Z-241020T0000Z/ San Francisco-Marin Coastal Range-Sonoma Coastal Range- North Bay Interior Mountains-North Bay Interior Valleys- San Francisco Bay Shoreline-San Francisco Peninsula Coast- East Bay Interior Valleys-Santa Cruz Mountains- Santa Clara Valley Including San Jose-Eastern Santa Clara Hills- East Bay Hills- 530 AM PDT Wed Oct 16 2024 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 PM THURSDAY TO 5 PM PDT SATURDAY FOR STRONG OFFSHORE WINDS AND CRITICALLY DRY CONDITIONS FOR ALL INTERIOR BAY AREA ZONES, AS WELL AS THE CITY OF SAN FRANCISCO, THE SAN FRANCISCO PENINSULA COAST, AND THE BAY SHORELINE... * AFFECTED AREA...Fire Weather Zone 006 San Francisco, Fire Weather Zone 502 Marin Coastal Range, Fire Weather Zone 503 Sonoma Coastal Range, Fire Weather Zone 504 North Bay Interior Mountains, Fire Weather Zone 506 North Bay Interior Valleys, Fire Weather Zone 508 San Francisco Bay Shoreline, Fire Weather Zone 509 San Francisco Peninsula Coast, Fire Weather Zone 510 East Bay Interior Valleys, Fire Weather Zone 512 Santa Cruz Mountains, Fire Weather Zone 513 Santa Clara Valley Including San Jose, Fire Weather Zone 514 Eastern Santa Clara Hills and Fire Weather Zone 515 East Bay Hills. * TIMING...11 PM Thursday until 5 PM Saturday * WINDS...North 25 to 35 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...As low as 12 percent. * LIGHTNING...None. * IMPACTS...The combination of gusty winds and low humidity can cause fire to rapidly grow in size and intensity. Outdoor burning is not recommended. Despite recent cool weather and high humidity, we are expecting a widespread and prolonged offshore wind event which will likely dry fuels out very quickly given their volatility over the past several weeks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ CAZ516>518-528-162030- /O.CON.KMTR.FW.W.0006.241018T0600Z-241020T0000Z/ Southern Salinas Valley/Arroyo Seco and Lake San Antonio- Santa Lucia Mountains and Los Padres National Forest- Mountains of San Benito County And Interior Monterey County including Pinnacles National Park- Northern Salinas Valley/Hollister Valley and Carmel Valley- 530 AM PDT Wed Oct 16 2024 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 PM THURSDAY TO 5 PM PDT SATURDAY FOR STRONG OFFSHORE WINDS FOR THE INTERIOR CENTRAL COAST... * AFFECTED AREA...Fire Weather Zone 516 Southern Salinas Valley/Arroyo Seco and Lake San Antonio, Fire Weather Zone 517 Santa Lucia Mountains and Los Padres National Forest, Fire Weather Zone 518 Mountains of San Benito County And Interior Monterey County including Pinnacles National Park and Fire Weather Zone 528 Northern Salinas Valley/Hollister Valley and Carmel Valley. * TIMING...11 PM Thursday until 5 PM Saturday * WINDS...North 25 to 35 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...As low as 13 percent. * LIGHTNING...None. * IMPACTS...The combination of gusty winds and low humidity can cause fire to rapidly grow in size and intensity. Outdoor burning is not recommended. Despite recent cool weather and high humidity, we are expecting a widespread and prolonged offshore wind event which will likely dry fuels out very quickly given their volatility over the past several weeks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
051 WWUS86 KMTR 161949 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 1249 PM PDT Wed Oct 16 2024 ...RED FLAG WARNING NOW IN EFFECT THURSDAY NIGHT THROUGH SATURDAY EVENING FOR THE BAY AREA AND CENTRAL COAST AS STRONG OFFSHORE WINDS AND CRITICALLY DRY CONDITIONS ARE EXPECTED TO DEVELOP... .Gusty north-northeast winds are expected to develop as an "inside slider" system moves into the Great Basin this weekend. Humidities will still be on the higher end at the start of the event on Thursday, but are expected to quickly dry out as low as 10% Friday and Saturday. Peak winds are expected overnight Thursday night into Friday morning for the North Bay and Bay Area. Most areas across the region will be affected to some degree, with likely exceptions being the immediate Big Sur coast and the Marin/Sonoma coast. Winds largely on the order of 25-35 mph can be expected with gusts to 50 mph...isolated gusts to 65 mph across the highest terrain and ridgetops, most notably the North Bay Interior Mountains and the Diablo Range. CAZ529-170500- /O.EXA.KMTR.FW.W.0006.241018T0600Z-241020T0000Z/ Northern Monterey Bay- 1249 PM PDT Wed Oct 16 2024 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 PM THURSDAY TO 5 PM PDT SATURDAY FOR STRONG OFFSHORE WINDS FOR THE SANTA CRUZ COAST AND NORTHERN MONTEREY BAY COAST... * AFFECTED AREA...Fire Weather Zone 529 Northern Monterey Bay. * TIMING...11 PM Thursday until 5 PM Saturday * WINDS...North 15 to 25 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...As low as 15 percent. * LIGHTNING...None. * IMPACTS...The combination of gusty winds and low humidity can cause fire to rapidly grow in size and intensity. Outdoor burning is not recommended. Despite recent cool weather and high humidity, we are expecting a widespread and prolonged offshore wind event which will likely dry fuels out very quickly given their volatility over the past several weeks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ CAZ006-502>504-506-508>510-512>515-170500- /O.CON.KMTR.FW.W.0006.241018T0600Z-241020T0000Z/ San Francisco-Marin Coastal Range-Sonoma Coastal Range- North Bay Interior Mountains-North Bay Interior Valleys- San Francisco Bay Shoreline-San Francisco Peninsula Coast- East Bay Interior Valleys-Santa Cruz Mountains- Santa Clara Valley Including San Jose-Eastern Santa Clara Hills- East Bay Hills- 1249 PM PDT Wed Oct 16 2024 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 PM THURSDAY TO 5 PM PDT SATURDAY FOR STRONG OFFSHORE WINDS AND CRITICALLY DRY CONDITIONS FOR ALL INTERIOR BAY AREA ZONES, AS WELL AS THE CITY OF SAN FRANCISCO, THE SAN FRANCISCO PENINSULA COAST, AND THE BAY SHORELINE... * AFFECTED AREA...Fire Weather Zone 006 San Francisco, Fire Weather Zone 502 Marin Coastal Range, Fire Weather Zone 503 Sonoma Coastal Range, Fire Weather Zone 504 North Bay Interior Mountains, Fire Weather Zone 506 North Bay Interior Valleys, Fire Weather Zone 508 San Francisco Bay Shoreline, Fire Weather Zone 509 San Francisco Peninsula Coast, Fire Weather Zone 510 East Bay Interior Valleys, Fire Weather Zone 512 Santa Cruz Mountains, Fire Weather Zone 513 Santa Clara Valley Including San Jose, Fire Weather Zone 514 Eastern Santa Clara Hills and Fire Weather Zone 515 East Bay Hills. * TIMING...11 PM Thursday until 5 PM Saturday * WINDS...North 15 to 25 mph with gusts up to 50 mph. Isolated gusts up to 65 mph in the highest terrain and ridgetops. * RELATIVE HUMIDITY...As low as 10 percent. * LIGHTNING...None. * IMPACTS...The combination of gusty winds and low humidity can cause fire to rapidly grow in size and intensity. Outdoor burning is not recommended. Despite recent cool weather and high humidity, we are expecting a widespread and prolonged offshore wind event which will likely dry fuels out very quickly given their volatility over the past several weeks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ CAZ516>518-528-170500- /O.CON.KMTR.FW.W.0006.241018T0600Z-241020T0000Z/ Southern Salinas Valley/Arroyo Seco and Lake San Antonio- Santa Lucia Mountains and Los Padres National Forest- Mountains of San Benito County And Interior Monterey County including Pinnacles National Park- Northern Salinas Valley/Hollister Valley and Carmel Valley- 1249 PM PDT Wed Oct 16 2024 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 PM THURSDAY TO 5 PM PDT SATURDAY FOR STRONG OFFSHORE WINDS FOR THE INTERIOR CENTRAL COAST... * AFFECTED AREA...Fire Weather Zone 516 Southern Salinas Valley/Arroyo Seco and Lake San Antonio, Fire Weather Zone 517 Santa Lucia Mountains and Los Padres National Forest, Fire Weather Zone 518 Mountains of San Benito County And Interior Monterey County including Pinnacles National Park and Fire Weather Zone 528 Northern Salinas Valley/Hollister Valley and Carmel Valley. * TIMING...11 PM Thursday until 5 PM Saturday * WINDS...North 10 to 20 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...As low as 10 percent. * LIGHTNING...None. * IMPACTS...The combination of gusty winds and low humidity can cause fire to rapidly grow in size and intensity. Outdoor burning is not recommended. Despite recent cool weather and high humidity, we are expecting a widespread and prolonged offshore wind event which will likely dry fuels out very quickly given their volatility over the past several weeks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
713 WWUS86 KMTR 170431 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 931 PM PDT Wed Oct 16 2024 ...RED FLAG WARNING NOW IN EFFECT THURSDAY NIGHT THROUGH SATURDAY EVENING FOR THE BAY AREA AND CENTRAL COAST AS STRONG OFFSHORE WINDS AND CRITICALLY DRY CONDITIONS ARE EXPECTED TO DEVELOP... .Gusty north-northeast winds are expected to develop as an "inside slider" system moves into the Great Basin this weekend. Humidities will still be on the higher end at the start of the event on Thursday, but are expected to quickly dry out as low as 10% Friday and Saturday. Peak winds are expected overnight Thursday night into Friday morning for the North Bay and Bay Area. Most areas across the region will be affected to some degree, with likely exceptions being the immediate Big Sur coast and the Marin/Sonoma coast. Winds largely on the order of 25- 35 mph can be expected with gusts to 50 mph...isolated gusts to 65 mph across the highest terrain and ridgetops, most notably the North Bay Interior Mountains and the Diablo Range. CAZ006-502>504-506-508>510-512>515-529-171245- /O.CON.KMTR.FW.W.0006.241018T0600Z-241020T0000Z/ San Francisco-Marin Coastal Range-Sonoma Coastal Range- North Bay Interior Mountains-North Bay Interior Valleys- San Francisco Bay Shoreline-San Francisco Peninsula Coast- East Bay Interior Valleys-Santa Cruz Mountains- Santa Clara Valley Including San Jose-Eastern Santa Clara Hills- East Bay Hills-Northern Monterey Bay- 931 PM PDT Wed Oct 16 2024 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 PM THURSDAY TO 5 PM PDT SATURDAY FOR STRONG OFFSHORE WINDS AND CRITICALLY DRY CONDITIONS FOR ALL INTERIOR BAY AREA ZONES, AS WELL AS THE CITY OF SAN FRANCISCO, THE SAN FRANCISCO PENINSULA COAST, AND THE BAY SHORELINE... * AFFECTED AREA...Fire Weather Zone 006 San Francisco, Fire Weather Zone 502 Marin Coastal Range, Fire Weather Zone 503 Sonoma Coastal Range, Fire Weather Zone 504 North Bay Interior Mountains, Fire Weather Zone 506 North Bay Interior Valleys, Fire Weather Zone 508 San Francisco Bay Shoreline, Fire Weather Zone 509 San Francisco Peninsula Coast, Fire Weather Zone 510 East Bay Interior Valleys, Fire Weather Zone 512 Santa Cruz Mountains, Fire Weather Zone 513 Santa Clara Valley Including San Jose, Fire Weather Zone 514 Eastern Santa Clara Hills, Fire Weather Zone 515 East Bay Hills and Fire Weather Zone 529 Northern Monterey Bay. * TIMING...11 PM Thursday until 5 PM Saturday * WINDS...North 25 to 35 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...As low as 9 percent. * LIGHTNING...None. * IMPACTS...The combination of gusty winds and low humidity can cause fire to rapidly grow in size and intensity. Outdoor burning is not recommended. Despite recent cool weather and high humidity, we are expecting a widespread and prolonged offshore wind event which will likely dry fuels out very quickly given their volatility over the past several weeks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ CAZ516>518-528-171245- /O.CON.KMTR.FW.W.0006.241018T0600Z-241020T0000Z/ Southern Salinas Valley/Arroyo Seco and Lake San Antonio- Santa Lucia Mountains and Los Padres National Forest- Mountains of San Benito County And Interior Monterey County including Pinnacles National Park- Northern Salinas Valley/Hollister Valley and Carmel Valley- 931 PM PDT Wed Oct 16 2024 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 PM THURSDAY TO 5 PM PDT SATURDAY FOR STRONG OFFSHORE WINDS FOR THE INTERIOR CENTRAL COAST... * AFFECTED AREA...Fire Weather Zone 516 Southern Salinas Valley/Arroyo Seco and Lake San Antonio, Fire Weather Zone 517 Santa Lucia Mountains and Los Padres National Forest, Fire Weather Zone 518 Mountains of San Benito County And Interior Monterey County including Pinnacles National Park and Fire Weather Zone 528 Northern Salinas Valley/Hollister Valley and Carmel Valley. * TIMING...11 PM Thursday until 5 PM Saturday * WINDS...North 25 to 35 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...As low as 12 percent. * LIGHTNING...None. * IMPACTS...The combination of gusty winds and low humidity can cause fire to rapidly grow in size and intensity. Outdoor burning is not recommended. Despite recent cool weather and high humidity, we are expecting a widespread and prolonged offshore wind event which will likely dry fuels out very quickly given their volatility over the past several weeks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
868 WWUS86 KMTR 171159 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 459 AM PDT Thu Oct 17 2024 ...RED FLAG WARNING NOW IN EFFECT THURSDAY NIGHT THROUGH SATURDAY EVENING FOR THE BAY AREA AND CENTRAL COAST AS STRONG OFFSHORE WINDS AND CRITICALLY DRY CONDITIONS ARE EXPECTED TO DEVELOP... .Gusty north-northeast winds are expected to develop as an "inside slider" system moves into the Great Basin this weekend. Humidities will still be on the higher end at the start of the event on Thursday, but are expected to quickly dry out as low as 10% Friday and Saturday. Peak winds are expected overnight Thursday night into Friday morning for the North Bay and Bay Area. Most areas across the region will be affected to some degree, with likely exceptions being the immediate Big Sur coast and the Marin/Sonoma coast. Winds largely on the order of 25- 35 mph can be expected with gusts to 50 mph...isolated gusts to 65 mph across the highest terrain and ridgetops, most notably the North Bay Interior Mountains and the Diablo Range. CAZ006-502>504-506-508>510-512>515-529-172100- /O.CON.KMTR.FW.W.0006.241018T0600Z-241020T0000Z/ San Francisco-Marin Coastal Range-Sonoma Coastal Range- North Bay Interior Mountains-North Bay Interior Valleys- San Francisco Bay Shoreline-San Francisco Peninsula Coast- East Bay Interior Valleys-Santa Cruz Mountains- Santa Clara Valley Including San Jose-Eastern Santa Clara Hills- East Bay Hills-Northern Monterey Bay- 459 AM PDT Thu Oct 17 2024 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO 5 PM PDT SATURDAY FOR STRONG OFFSHORE WINDS AND CRITICALLY DRY CONDITIONS FOR ALL INTERIOR BAY AREA ZONES, AS WELL AS THE CITY OF SAN FRANCISCO, THE SAN FRANCISCO PENINSULA COAST, AND THE BAY SHORELINE... * AFFECTED AREA...Fire Weather Zone 006 San Francisco, Fire Weather Zone 502 Marin Coastal Range, Fire Weather Zone 503 Sonoma Coastal Range, Fire Weather Zone 504 North Bay Interior Mountains, Fire Weather Zone 506 North Bay Interior Valleys, Fire Weather Zone 508 San Francisco Bay Shoreline, Fire Weather Zone 509 San Francisco Peninsula Coast, Fire Weather Zone 510 East Bay Interior Valleys, Fire Weather Zone 512 Santa Cruz Mountains, Fire Weather Zone 513 Santa Clara Valley Including San Jose, Fire Weather Zone 514 Eastern Santa Clara Hills, Fire Weather Zone 515 East Bay Hills and Fire Weather Zone 529 Northern Monterey Bay. * TIMING...11 PM Thursday until 5 PM Saturday * WINDS...North 25 to 35 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...As low as 9 percent. * LIGHTNING...None. * IMPACTS...The combination of gusty winds and low humidity can cause fire to rapidly grow in size and intensity. Outdoor burning is not recommended. Despite recent cool weather and high humidity, we are expecting a widespread and prolonged offshore wind event which will likely dry fuels out very quickly given their volatility over the past several weeks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ CAZ516>518-528-172100- /O.CON.KMTR.FW.W.0006.241018T0600Z-241020T0000Z/ Southern Salinas Valley/Arroyo Seco and Lake San Antonio- Santa Lucia Mountains and Los Padres National Forest- Mountains of San Benito County And Interior Monterey County including Pinnacles National Park- Northern Salinas Valley/Hollister Valley and Carmel Valley- 459 AM PDT Thu Oct 17 2024 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO 5 PM PDT SATURDAY FOR STRONG OFFSHORE WINDS FOR THE INTERIOR CENTRAL COAST... * AFFECTED AREA...Fire Weather Zone 516 Southern Salinas Valley/Arroyo Seco and Lake San Antonio, Fire Weather Zone 517 Santa Lucia Mountains and Los Padres National Forest, Fire Weather Zone 518 Mountains of San Benito County And Interior Monterey County including Pinnacles National Park and Fire Weather Zone 528 Northern Salinas Valley/Hollister Valley and Carmel Valley. * TIMING...11 PM Thursday until 5 PM Saturday * WINDS...North 25 to 35 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...As low as 11 percent. * LIGHTNING...None. * IMPACTS...The combination of gusty winds and low humidity can cause fire to rapidly grow in size and intensity. Outdoor burning is not recommended. Despite recent cool weather and high humidity, we are expecting a widespread and prolonged offshore wind event which will likely dry fuels out very quickly given their volatility over the past several weeks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
477 WWUS86 KMTR 172024 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 124 PM PDT Thu Oct 17 2024 ...RED FLAG WARNING NOW IN EFFECT THURSDAY NIGHT THROUGH SATURDAY EVENING FOR THE BAY AREA AND CENTRAL COAST AS STRONG OFFSHORE WINDS AND CRITICALLY DRY CONDITIONS ARE EXPECTED TO DEVELOP... .Gusty north-northeast winds are expected to develop as an "inside slider" system moves into the Great Basin this weekend. Humidities will still be on the higher end at the start of the event on Thursday, but are expected to quickly dry out as low as the upper single digits Friday and Saturday. Peak winds are expected overnight tonight into Friday morning for the North Bay and Bay Area. Most areas across the region will be affected to some degree, with likely exceptions being the immediate Big Sur coast and the Marin/Sonoma coast. Winds largely on the order of 25-35 mph can be expected with gusts to 50 mph, isolated gusts to 65 mph across the highest terrain and ridgetops, most notably the North Bay Interior Mountains and the Diablo Range. CAZ006-502>504-506-508>510-512>515-529-181200- /O.CON.KMTR.FW.W.0006.241018T0600Z-241020T0000Z/ San Francisco-Marin Coastal Range-Sonoma Coastal Range- North Bay Interior Mountains-North Bay Interior Valleys- San Francisco Bay Shoreline-San Francisco Peninsula Coast- East Bay Interior Valleys-Santa Cruz Mountains- Santa Clara Valley Including San Jose-Eastern Santa Clara Hills- East Bay Hills-Northern Monterey Bay- 124 PM PDT Thu Oct 17 2024 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO 5 PM PDT SATURDAY FOR STRONG OFFSHORE WINDS AND CRITICALLY DRY CONDITIONS FOR ALL INTERIOR BAY AREA ZONES, AS WELL AS THE CITY OF SAN FRANCISCO, THE SAN FRANCISCO PENINSULA COAST, AND THE BAY SHORELINE... * AFFECTED AREA...Fire Weather Zone 006 San Francisco, Fire Weather Zone 502 Marin Coastal Range, Fire Weather Zone 503 Sonoma Coastal Range, Fire Weather Zone 504 North Bay Interior Mountains, Fire Weather Zone 506 North Bay Interior Valleys, Fire Weather Zone 508 San Francisco Bay Shoreline, Fire Weather Zone 509 San Francisco Peninsula Coast, Fire Weather Zone 510 East Bay Interior Valleys, Fire Weather Zone 512 Santa Cruz Mountains, Fire Weather Zone 513 Santa Clara Valley Including San Jose, Fire Weather Zone 514 Eastern Santa Clara Hills, Fire Weather Zone 515 East Bay Hills and Fire Weather Zone 529 Northern Monterey Bay. * TIMING...11 PM Thursday until 5 PM Saturday * WINDS...North 25 to 35 mph with gusts up to 50 mph. Gusts up to 65 mph in the highest peaks of the North Bay Interior Mountains and the Diablo Range. * RELATIVE HUMIDITY...As low as 9 percent. * LIGHTNING...None. * IMPACTS...The combination of gusty winds and low humidity can cause fire to rapidly grow in size and intensity. Outdoor burning is not recommended. Despite recent cool weather and high humidity, we are expecting a widespread and prolonged offshore wind event which will likely dry fuels out very quickly given their volatility over the past several weeks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ CAZ516>518-528-181200- /O.CON.KMTR.FW.W.0006.241018T0600Z-241020T0000Z/ Southern Salinas Valley/Arroyo Seco and Lake San Antonio- Santa Lucia Mountains and Los Padres National Forest- Mountains of San Benito County And Interior Monterey County including Pinnacles National Park- Northern Salinas Valley/Hollister Valley and Carmel Valley- 124 PM PDT Thu Oct 17 2024 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO 5 PM PDT SATURDAY FOR STRONG OFFSHORE WINDS FOR THE INTERIOR CENTRAL COAST... * AFFECTED AREA...Fire Weather Zone 516 Southern Salinas Valley/Arroyo Seco and Lake San Antonio, Fire Weather Zone 517 Santa Lucia Mountains and Los Padres National Forest, Fire Weather Zone 518 Mountains of San Benito County And Interior Monterey County including Pinnacles National Park and Fire Weather Zone 528 Northern Salinas Valley/Hollister Valley and Carmel Valley. * TIMING...11 PM Thursday until 5 PM Saturday * WINDS...North 25 to 35 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...As low as 11 percent. * LIGHTNING...None. * IMPACTS...The combination of gusty winds and low humidity can cause fire to rapidly grow in size and intensity. Outdoor burning is not recommended. Despite recent cool weather and high humidity, we are expecting a widespread and prolonged offshore wind event which will likely dry fuels out very quickly given their volatility over the past several weeks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
355 WWUS86 KMTR 181104 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 404 AM PDT Fri Oct 18 2024 ...RED FLAG WARNING NOW IN EFFECT THURSDAY NIGHT THROUGH SATURDAY EVENING FOR THE BAY AREA AND CENTRAL COAST AS STRONG OFFSHORE WINDS AND CRITICALLY DRY CONDITIONS ARE EXPECTED TO DEVELOP... .Gusty north-northeast winds are expected to develop as an "inside slider" system moves into the Great Basin this weekend. Humidities will still be on the higher end at the start of the event on Thursday, but are expected to quickly dry out as low as the upper single digits Friday and Saturday. Peak winds are expected overnight tonight into Friday morning for the North Bay and Bay Area. Most areas across the region will be affected to some degree, with likely exceptions being the immediate Big Sur coast and the Marin/Sonoma coast. Winds largely on the order of 25-35 mph can be expected with gusts to 50 mph, isolated gusts to 65 mph across the highest terrain and ridgetops, most notably the North Bay Interior Mountains and the Diablo Range. CAZ006-502>504-506-508>510-512>515-529-182100- /O.CON.KMTR.FW.W.0006.000000T0000Z-241020T0000Z/ San Francisco-Marin Coastal Range-Sonoma Coastal Range- North Bay Interior Mountains-North Bay Interior Valleys- San Francisco Bay Shoreline-San Francisco Peninsula Coast- East Bay Interior Valleys-Santa Cruz Mountains- Santa Clara Valley Including San Jose-Eastern Santa Clara Hills- East Bay Hills-Northern Monterey Bay- 404 AM PDT Fri Oct 18 2024 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT SATURDAY FOR STRONG OFFSHORE WINDS AND CRITICALLY DRY CONDITIONS FOR ALL INTERIOR BAY AREA ZONES, AS WELL AS THE CITY OF SAN FRANCISCO, THE SAN FRANCISCO PENINSULA COAST, AND THE BAY SHORELINE... * AFFECTED AREA...Fire Weather Zone 006 San Francisco, Fire Weather Zone 502 Marin Coastal Range, Fire Weather Zone 503 Sonoma Coastal Range, Fire Weather Zone 504 North Bay Interior Mountains, Fire Weather Zone 506 North Bay Interior Valleys, Fire Weather Zone 508 San Francisco Bay Shoreline, Fire Weather Zone 509 San Francisco Peninsula Coast, Fire Weather Zone 510 East Bay Interior Valleys, Fire Weather Zone 512 Santa Cruz Mountains, Fire Weather Zone 513 Santa Clara Valley Including San Jose, Fire Weather Zone 514 Eastern Santa Clara Hills, Fire Weather Zone 515 East Bay Hills and Fire Weather Zone 529 Northern Monterey Bay. * TIMING...11 PM Thursday until 5 PM Saturday * WINDS...North 25 to 35 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...As low as 8 percent. * LIGHTNING...None. * IMPACTS...The combination of gusty winds and low humidity can cause fire to rapidly grow in size and intensity. Outdoor burning is not recommended. Despite recent cool weather and high humidity, we are expecting a widespread and prolonged offshore wind event which will likely dry fuels out very quickly given their volatility over the past several weeks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ CAZ516>518-528-182100- /O.CON.KMTR.FW.W.0006.000000T0000Z-241020T0000Z/ Southern Salinas Valley/Arroyo Seco and Lake San Antonio- Santa Lucia Mountains and Los Padres National Forest- Mountains of San Benito County And Interior Monterey County including Pinnacles National Park- Northern Salinas Valley/Hollister Valley and Carmel Valley- 404 AM PDT Fri Oct 18 2024 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT SATURDAY FOR STRONG OFFSHORE WINDS FOR THE INTERIOR CENTRAL COAST... * AFFECTED AREA...Fire Weather Zone 516 Southern Salinas Valley/Arroyo Seco and Lake San Antonio, Fire Weather Zone 517 Santa Lucia Mountains and Los Padres National Forest, Fire Weather Zone 518 Mountains of San Benito County And Interior Monterey County including Pinnacles National Park and Fire Weather Zone 528 Northern Salinas Valley/Hollister Valley and Carmel Valley. * TIMING...11 PM Thursday until 5 PM Saturday * WINDS...North 25 to 35 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...As low as 10 percent. * LIGHTNING...None. * IMPACTS...The combination of gusty winds and low humidity can cause fire to rapidly grow in size and intensity. Outdoor burning is not recommended. Despite recent cool weather and high humidity, we are expecting a widespread and prolonged offshore wind event which will likely dry fuels out very quickly given their volatility over the past several weeks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
333 WWUS86 KMTR 182032 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 132 PM PDT Fri Oct 18 2024 ...RED FLAG WARNING NOW IN EFFECT THURSDAY NIGHT THROUGH SATURDAY EVENING FOR THE BAY AREA AND CENTRAL COAST AS STRONG OFFSHORE WINDS AND CRITICALLY DRY CONDITIONS ARE EXPECTED TO DEVELOP... .Gusty north-northeast winds are expected to develop as an "inside slider" system moves into the Great Basin this weekend. Humidities will still be on the higher end at the start of the event on Thursday, but are expected to quickly dry out as low as the upper single digits Friday and Saturday. Peak winds are expected overnight tonight into Friday morning for the North Bay and Bay Area. Most areas across the region will be affected to some degree, with likely exceptions being the immediate Big Sur coast and the Marin/Sonoma coast. Winds largely on the order of 25-35 mph can be expected with gusts to 50 mph, isolated gusts to 65 mph across the highest terrain and ridgetops, most notably the North Bay Interior Mountains and the Diablo Range. CAZ006-502>504-506-508>510-512>515-529-190445- /O.CON.KMTR.FW.W.0006.000000T0000Z-241020T0000Z/ San Francisco-Marin Coastal Range-Sonoma Coastal Range- North Bay Interior Mountains-North Bay Interior Valleys- San Francisco Bay Shoreline-San Francisco Peninsula Coast- East Bay Interior Valleys-Santa Cruz Mountains- Santa Clara Valley Including San Jose-Eastern Santa Clara Hills- East Bay Hills-Northern Monterey Bay- 132 PM PDT Fri Oct 18 2024 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT SATURDAY FOR STRONG OFFSHORE WINDS AND CRITICALLY DRY CONDITIONS FOR ALL INTERIOR BAY AREA ZONES, AS WELL AS THE CITY OF SAN FRANCISCO, THE SAN FRANCISCO PENINSULA COAST, AND THE BAY SHORELINE... * AFFECTED AREA...Fire Weather Zone 006 San Francisco, Fire Weather Zone 502 Marin Coastal Range, Fire Weather Zone 503 Sonoma Coastal Range, Fire Weather Zone 504 North Bay Interior Mountains, Fire Weather Zone 506 North Bay Interior Valleys, Fire Weather Zone 508 San Francisco Bay Shoreline, Fire Weather Zone 509 San Francisco Peninsula Coast, Fire Weather Zone 510 East Bay Interior Valleys, Fire Weather Zone 512 Santa Cruz Mountains, Fire Weather Zone 513 Santa Clara Valley Including San Jose, Fire Weather Zone 514 Eastern Santa Clara Hills, Fire Weather Zone 515 East Bay Hills and Fire Weather Zone 529 Northern Monterey Bay. * TIMING...11 PM Thursday until 5 PM Saturday * WINDS...North 10 to 20 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 8 percent. * TEMPERATURES...Up to 83. * LIGHTNING...None. * IMPACTS...The combination of gusty winds and low humidity can cause fire to rapidly grow in size and intensity. Outdoor burning is not recommended. Despite recent cool weather and high humidity, we are expecting a widespread and prolonged offshore wind event which will likely dry fuels out very quickly given their volatility over the past several weeks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ CAZ516>518-528-190445- /O.CON.KMTR.FW.W.0006.000000T0000Z-241020T0000Z/ Southern Salinas Valley/Arroyo Seco and Lake San Antonio- Santa Lucia Mountains and Los Padres National Forest- Mountains of San Benito County And Interior Monterey County including Pinnacles National Park- Northern Salinas Valley/Hollister Valley and Carmel Valley- 132 PM PDT Fri Oct 18 2024 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT SATURDAY FOR STRONG OFFSHORE WINDS FOR THE INTERIOR CENTRAL COAST... * AFFECTED AREA...Fire Weather Zone 516 Southern Salinas Valley/Arroyo Seco and Lake San Antonio, Fire Weather Zone 517 Santa Lucia Mountains and Los Padres National Forest, Fire Weather Zone 518 Mountains of San Benito County And Interior Monterey County including Pinnacles National Park and Fire Weather Zone 528 Northern Salinas Valley/Hollister Valley and Carmel Valley. * TIMING...11 PM Thursday until 5 PM Saturday * WINDS...Northeast 10 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 10 percent. * TEMPERATURES...Up to 79. * LIGHTNING...None. * IMPACTS...The combination of gusty winds and low humidity can cause fire to rapidly grow in size and intensity. Outdoor burning is not recommended. Despite recent cool weather and high humidity, we are expecting a widespread and prolonged offshore wind event which will likely dry fuels out very quickly given their volatility over the past several weeks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
714 WWUS86 KMTR 190359 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 859 PM PDT Fri Oct 18 2024 ...RED FLAG WARNING NOW IN EFFECT THURSDAY NIGHT THROUGH SATURDAY EVENING FOR THE BAY AREA AND CENTRAL COAST AS STRONG OFFSHORE WINDS AND CRITICALLY DRY CONDITIONS ARE EXPECTED TO DEVELOP... .Gusty north-northeast winds are expected to develop as an "inside slider" system moves into the Great Basin this weekend. Humidities will still be on the higher end at the start of the event on Thursday, but are expected to quickly dry out as low as the upper single digits Friday and Saturday. Peak winds are expected overnight tonight into Friday morning for the North Bay and Bay Area. Most areas across the region will be affected to some degree, with likely exceptions being the immediate Big Sur coast and the Marin/Sonoma coast. Winds largely on the order of 25-35 mph can be expected with gusts to 50 mph, isolated gusts to 65 mph across the highest terrain and ridgetops, most notably the North Bay Interior Mountains and the Diablo Range. CAZ006-502>504-506-508>510-512>515-529-191200- /O.CON.KMTR.FW.W.0006.000000T0000Z-241020T0000Z/ San Francisco-Marin Coastal Range-Sonoma Coastal Range- North Bay Interior Mountains-North Bay Interior Valleys- San Francisco Bay Shoreline-San Francisco Peninsula Coast- East Bay Interior Valleys-Santa Cruz Mountains- Santa Clara Valley Including San Jose-Eastern Santa Clara Hills- East Bay Hills-Northern Monterey Bay- 859 PM PDT Fri Oct 18 2024 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT SATURDAY FOR STRONG OFFSHORE WINDS AND CRITICALLY DRY CONDITIONS FOR ALL INTERIOR BAY AREA ZONES, AS WELL AS THE CITY OF SAN FRANCISCO, THE SAN FRANCISCO PENINSULA COAST, AND THE BAY SHORELINE... * AFFECTED AREA...Fire Weather Zone 006 San Francisco, Fire Weather Zone 502 Marin Coastal Range, Fire Weather Zone 503 Sonoma Coastal Range, Fire Weather Zone 504 North Bay Interior Mountains, Fire Weather Zone 506 North Bay Interior Valleys, Fire Weather Zone 508 San Francisco Bay Shoreline, Fire Weather Zone 509 San Francisco Peninsula Coast, Fire Weather Zone 510 East Bay Interior Valleys, Fire Weather Zone 512 Santa Cruz Mountains, Fire Weather Zone 513 Santa Clara Valley Including San Jose, Fire Weather Zone 514 Eastern Santa Clara Hills, Fire Weather Zone 515 East Bay Hills and Fire Weather Zone 529 Northern Monterey Bay. * TIMING...11 PM Thursday until 5 PM Saturday * WINDS...North 10 to 20 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 10 percent. * TEMPERATURES...Up to 83. * LIGHTNING...None. * IMPACTS...The combination of gusty winds and low humidity can cause fire to rapidly grow in size and intensity. Outdoor burning is not recommended. Despite recent cool weather and high humidity, we are expecting a widespread and prolonged offshore wind event which will likely dry fuels out very quickly given their volatility over the past several weeks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ CAZ516>518-528-191200- /O.CON.KMTR.FW.W.0006.000000T0000Z-241020T0000Z/ Southern Salinas Valley/Arroyo Seco and Lake San Antonio- Santa Lucia Mountains and Los Padres National Forest- Mountains of San Benito County And Interior Monterey County including Pinnacles National Park- Northern Salinas Valley/Hollister Valley and Carmel Valley- 859 PM PDT Fri Oct 18 2024 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT SATURDAY FOR STRONG OFFSHORE WINDS FOR THE INTERIOR CENTRAL COAST... * AFFECTED AREA...Fire Weather Zone 516 Southern Salinas Valley/Arroyo Seco and Lake San Antonio, Fire Weather Zone 517 Santa Lucia Mountains and Los Padres National Forest, Fire Weather Zone 518 Mountains of San Benito County And Interior Monterey County including Pinnacles National Park and Fire Weather Zone 528 Northern Salinas Valley/Hollister Valley and Carmel Valley. * TIMING...11 PM Thursday until 5 PM Saturday * WINDS...Southeast 10 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 12 percent. * TEMPERATURES...Up to 79. * LIGHTNING...None. * IMPACTS...The combination of gusty winds and low humidity can cause fire to rapidly grow in size and intensity. Outdoor burning is not recommended. Despite recent cool weather and high humidity, we are expecting a widespread and prolonged offshore wind event which will likely dry fuels out very quickly given their volatility over the past several weeks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
570 WWUS86 KMTR 191105 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 405 AM PDT Sat Oct 19 2024 ...RED FLAG WARNING NOW IN EFFECT THURSDAY NIGHT THROUGH SATURDAY EVENING FOR THE BAY AREA AND CENTRAL COAST AS STRONG OFFSHORE WINDS AND CRITICALLY DRY CONDITIONS ARE EXPECTED TO DEVELOP... .Gusty north-northeast winds are expected to develop as an "inside slider" system moves into the Great Basin this weekend. Humidities will still be on the higher end at the start of the event on Thursday, but are expected to quickly dry out as low as the upper single digits Friday and Saturday. Peak winds are expected overnight tonight into Friday morning for the North Bay and Bay Area. Most areas across the region will be affected to some degree, with likely exceptions being the immediate Big Sur coast and the Marin/Sonoma coast. Winds largely on the order of 25-35 mph can be expected with gusts to 50 mph, isolated gusts to 65 mph across the highest terrain and ridgetops, most notably the North Bay Interior Mountains and the Diablo Range. CAZ006-502>504-506-508>510-512>515-529-200000- /O.CON.KMTR.FW.W.0006.000000T0000Z-241020T0000Z/ San Francisco-Marin Coastal Range-Sonoma Coastal Range- North Bay Interior Mountains-North Bay Interior Valleys- San Francisco Bay Shoreline-San Francisco Peninsula Coast- East Bay Interior Valleys-Santa Cruz Mountains- Santa Clara Valley Including San Jose-Eastern Santa Clara Hills- East Bay Hills-Northern Monterey Bay- 405 AM PDT Sat Oct 19 2024 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT THIS AFTERNOON FOR STRONG OFFSHORE WINDS AND CRITICALLY DRY CONDITIONS FOR ALL INTERIOR BAY AREA ZONES, AS WELL AS THE CITY OF SAN FRANCISCO, THE SAN FRANCISCO PENINSULA COAST, AND THE BAY SHORELINE... * AFFECTED AREA...Fire Weather Zone 006 San Francisco, Fire Weather Zone 502 Marin Coastal Range, Fire Weather Zone 503 Sonoma Coastal Range, Fire Weather Zone 504 North Bay Interior Mountains, Fire Weather Zone 506 North Bay Interior Valleys, Fire Weather Zone 508 San Francisco Bay Shoreline, Fire Weather Zone 509 San Francisco Peninsula Coast, Fire Weather Zone 510 East Bay Interior Valleys, Fire Weather Zone 512 Santa Cruz Mountains, Fire Weather Zone 513 Santa Clara Valley Including San Jose, Fire Weather Zone 514 Eastern Santa Clara Hills, Fire Weather Zone 515 East Bay Hills and Fire Weather Zone 529 Northern Monterey Bay. * TIMING...11 PM Thursday until 5 PM Saturday * WINDS...North 25 to 35 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...As low as 13 percent. * TEMPERATURES...Up to 83. * LIGHTNING...None. * IMPACTS...The combination of gusty winds and low humidity can cause fire to rapidly grow in size and intensity. Outdoor burning is not recommended. Despite recent cool weather and high humidity, we are expecting a widespread and prolonged offshore wind event which will likely dry fuels out very quickly given their volatility over the past several weeks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ CAZ516>518-528-200000- /O.CON.KMTR.FW.W.0006.000000T0000Z-241020T0000Z/ Southern Salinas Valley/Arroyo Seco and Lake San Antonio- Santa Lucia Mountains and Los Padres National Forest- Mountains of San Benito County And Interior Monterey County including Pinnacles National Park- Northern Salinas Valley/Hollister Valley and Carmel Valley- 405 AM PDT Sat Oct 19 2024 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT THIS AFTERNOON FOR STRONG OFFSHORE WINDS FOR THE INTERIOR CENTRAL COAST... * AFFECTED AREA...Fire Weather Zone 516 Southern Salinas Valley/Arroyo Seco and Lake San Antonio, Fire Weather Zone 517 Santa Lucia Mountains and Los Padres National Forest, Fire Weather Zone 518 Mountains of San Benito County And Interior Monterey County including Pinnacles National Park and Fire Weather Zone 528 Northern Salinas Valley/Hollister Valley and Carmel Valley. * TIMING...11 PM Thursday until 5 PM Saturday * WINDS...North 25 to 35 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...As low as 11 percent. * TEMPERATURES...Up to 79. * LIGHTNING...None. * IMPACTS...The combination of gusty winds and low humidity can cause fire to rapidly grow in size and intensity. Outdoor burning is not recommended. Despite recent cool weather and high humidity, we are expecting a widespread and prolonged offshore wind event which will likely dry fuels out very quickly given their volatility over the past several weeks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
768 WWUS86 KMTR 192350 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 450 PM PDT Sat Oct 19 2024 CAZ006-502>504-506-508>510-512>515-529-200100- /O.EXP.KMTR.FW.W.0006.000000T0000Z-241020T0000Z/ San Francisco-Marin Coastal Range-Sonoma Coastal Range- North Bay Interior Mountains-North Bay Interior Valleys- San Francisco Bay Shoreline-San Francisco Peninsula Coast- East Bay Interior Valleys-Santa Cruz Mountains- Santa Clara Valley Including San Jose-Eastern Santa Clara Hills- East Bay Hills-Northern Monterey Bay- 450 PM PDT Sat Oct 19 2024 ...RED FLAG WARNING WILL EXPIRE AT 5 PM PDT THIS AFTERNOON FOR STRONG OFFSHORE WINDS AND CRITICALLY DRY CONDITIONS FOR ALL INTERIOR BAY AREA ZONES, AS WELL AS THE CITY OF SAN FRANCISCO, THE SAN FRANCISCO PENINSULA COAST, AND THE BAY SHORELINE... The Red Flag warning will be allowed to expire at 5 PM this evening as wind speeds continue to diminish. However, near critically dry conditions continue into the early work week, particularly at elevations above 1000 feet. People should continue to pay attention and take precautions to prevent the development and spread of wildfires as long as these dry conditions persist. $$ CAZ516>518-528-200100- /O.EXP.KMTR.FW.W.0006.000000T0000Z-241020T0000Z/ Southern Salinas Valley/Arroyo Seco and Lake San Antonio- Santa Lucia Mountains and Los Padres National Forest- Mountains of San Benito County And Interior Monterey County including Pinnacles National Park- Northern Salinas Valley/Hollister Valley and Carmel Valley- 450 PM PDT Sat Oct 19 2024 ...RED FLAG WARNING WILL EXPIRE AT 5 PM PDT THIS AFTERNOON FOR STRONG OFFSHORE WINDS FOR THE INTERIOR CENTRAL COAST... The Red Flag warning will be allowed to expire at 5 PM this evening as wind speeds continue to diminish. However, near critically dry conditions continue into the early work week, particularly at elevations above 1000 feet. People should continue to pay attention and take precautions to prevent the development and spread of wildfires as long as these dry conditions persist. $$
What forecasters said that day
The local office's own words before this red flag warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS San Francisco Bay Area, CA wrote its last area forecast discussion before this red flag warning went out at Oct 15, 4:43 AM PDT, 5 hours 3 minutes earlier.
Area forecast discussion, Oct 15, 4:43 AM PDT, 5 hours 3 minutes before
Area Forecast Discussion
National Weather Service San Francisco CA
443 AM PDT Tue Oct 15 2024
...New AVIATION, MARINE...
.SYNOPSIS...
Issued at 144 AM PDT Tue Oct 15 2024
Relatively quiet weather today as shortwave ridging continues to
dominate. An inside slider event will result in critical fire
weather conditions Thursday through the weekend.
&&
.SHORT TERM...
(Today and tonight)
Issued at 144 AM PDT Tue Oct 15 2024
Shortwave ridging will result in near normal temperatures and a
compressed/shallow marine layer through the day. The pattern
begins to change tonight as troughing from a deep upper-level low
in Canada and an associated cold front drops into the area. With
no location expected to receive more than 0.05" inches of
precipitation, this will do nothing to damper the critical fire
weather conditions expected beginning Thursday.
&&
.LONG TERM...
(Wednesday through Monday)
Issued at 144 AM PDT Tue Oct 15 2024
Confidence is increasing in an inside slider event as 60% of global
ensemble members continue to trend towards a stronger, further west
cutoff low solution, this is a reasonable worst case scenario. The
biggest contributors to uncertainty at this time lie in the location
and strength of the cutoff low. As the deep upper-level low digs
into the Great Basin Thursday, strong northerly winds will develop
across the region. Fortunately for fire weather concerns the wind on
Thursday will not yet have an easterly component. This changes as
the upper-level low becomes a cutoff low and digs further south
Friday and winds become northeasterly/offshore, promoting rapid
drying and compressional warming. Relative humidity recovery and
retention will be poor Thursday through Saturday with Thursday night
into Friday morning and Friday night into Saturday morning being the
windiest timeframes. All of this to say critical fire weather
conditions are going to be prevalent Thursday through Saturday.
Extreme precautions should be taken and extreme fire safety should
be exercised this week.
&&
.AVIATION...
(12Z TAFS)
Issued at 425 AM PDT Tue Oct 15 2024
Patchwork stratus this morning, with the major Bay Area commercial
terminals (SFO, OAK, SJC) enjoying a clear window. The North Bay
is dealing with IFR and below visibility and ceilings which will
persist through mid-morning. Winds will stay moderate across the
area during the TAF period and may flip to offshore overnight.
High clouds will begin to roll in towards the end of the TAF
period, signaling a disturbance that will cause the marine layer
to expand and should improve aviation weather conditions tonight.
Vicinity of SFO...Somewhat surprisingly the 3 main Bay Area
terminals are still VFR this morning. Guidance is still suggesting
a sunrise surprise will form in the SF Bay and expand in all
directions, even reaching as far as SJC. Since the guidance was
too aggressive with the marine layer stratus so far this morning,
the TAFs are more optimistic and keep all 3 sites VFR through the
day. Otherwise the typical moderate to strong onshore winds will
develop at SFO this afternoon. Looking beyond the TAF period,
there is a good chance for near gale force gusts at SFO on
Thursday afternoon and/or evening as a cold front pushes through.
SFO Bridge Approach...Currently VFR, though a small cloud deck in
the East Bay is expanding over the bridge and may impact the
approach through the morning hours.
Monterey Bay Terminals...LIFR ceilings at both MRY and SNS, with
visibility dropping at both sites. Both sites will be in the junk
through mid morning before a few hours of VFR conditions in the
afternoon. An early return of IFR or worse stratus is expected
before the sun sets.
&&
.MARINE...
(Today through Sunday)
Issued at 425 AM PDT Tue Oct 15 2024
Rough to very rough seas continue across the exposed waters, with
buoys reporting significant wave heights of 10 to 13 feet in a NW
swell, and a fresh to strong NW breeze. Conditions will gradually
improve through Wednesday as the long period swell abates. This
reprieve will be short lived as conditions deteriorate again by
Thursday. A stronger system will bring the possibility for gale
force gusts and rebuild rough seas across the coastal waters.
&&
.FIRE WEATHER...
Issued at 149 AM PDT Tue Oct 15 2024
A Fire Weather Watch is in effect from 11 AM Thursday until 8 PM
Saturday. Normal temperatures, excellent relative humidity
recoveries, and onshore flow will keep fire weather concerns at
ease through Wednesday. Fire weather concerns will be high
Thursday through the weekend as an inside slider event comes to
town. While fuels are near average, they are expected to dry out
as the week progresses. Northerly winds will develop Thursday as
a deep upper-level low digs into the Great Basin. As this digs
further south and becomes a cutoff low, winds will become
northeasterly/offshore. These winds will lead to rapid drying,
compressional warming, poor relative humidity recovery and
retention as low as 15%, and a nonexistent marine layer. The
windiest timeframes will be Thursday night into Friday morning and
Friday night into Saturday morning with winds largely on the
order of 20-30 mph with gusts to 40 mph, isolated gusts to 50 mph
across the highest terrain and ridgetops and through gaps and
passes.
&&
.BEACHES...
Issued at 850 PM PDT Sun Oct 13 2024
Long period northwesterly swell of 13-17 seconds with wave heights
approaching 10 feet will result in a moderate risk of sneaker waves
across all Pacific Coast beaches through at least Wednesday. Large
waves can sweep across the beach without warning, pulling people
into the sea from rocks, jetties, and beaches. Beachgoers should
always remember to observe the ocean for 20 minutes before relaxing
near the water, keep your pets on a leash and away from the water,
and never turn your back on the ocean.
&&
.MTR WATCHES/WARNINGS/ADVISORIES...
CA...Beach Hazards Statement through Wednesday evening for CAZ006-505-
509-529-530.
Fire Weather Watch from Thursday morning through Saturday
evening for CAZ006-502>504-506-508>510-512>518-528.
PZ...Small Craft Advisory until 9 AM PDT this morning for Pigeon Pt
to Pt Pinos 10-60 NM-Pt Arena to Pt Reyes 10-60 NM-Pt Pinos
to Pt Piedras Blancas 0-10 nm.
&&
SHORT TERM...Sarment
LONG TERM....Sarment
AVIATION...Flynn
MARINE...Flynn
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www.twitter.com/nwsbayarea
www.youtube.com/nwsbayareaThe office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 15, 2:33 PM PDT | Small Craft Advisory | MTR | 42 hr |
Nearby
Red Flag Warnings in California, 2024Every red flag warning in 2024
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.