Alert archive / California / Red Flag Warnings in 2021
Red Flag Warning 8, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this red flag warning at Oct 10, 2021, 3:03 AM PDT for 7 counties in California. It took effect at Oct 10, 2021, 11:00 PM PDT. It was in force for 42 hr. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Oct 10, 2021, 3:03 AM PDT (10:03 UTC)
- In effect from
- Oct 10, 2021, 11:00 PM PDT
- Expired
- Oct 12, 2021, 5:00 PM PDT
- In force
- 42 hr
- Issued by
- NWS San Francisco Bay Area, CA
Counties Alameda County, CA, Contra Costa County, CA, Monterey County, CA, San Benito County, CA, San Mateo County, CA, Santa Clara County, CA, Santa Cruz County, CA
The radar
The San Francisco radar (KMUX), 12 km from the middle of the area, began a volume at 10:10 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Oct 11, 6:00 AM PDT | NON-TSTM WND DMG | El Granada, CA | THREE VEHICLES DESTROYED ONE HOME DAMAGED DUE TO WINDS. PHOTOS ON SOCIAL MEDIA SHOW DOWNED TREE ON ONE OR MORE VEHICLES. |
| Oct 11, 1:03 PM PDT | NON-TSTM WND DMG | 2 Se Del Monte Forest, CA | TREE DOWN ACROSS ROADWAY AT CARPENTER RD AND VALLEY WAY. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Oakland, CA (KOAK), launched 00:00Z, 10.1 hours before the alert went out and 74 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
- 2068 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- -48 m²/s²
- 0-3 km storm-relative helicity
- -32 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
166 WWUS86 KMTR 101003 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 303 AM PDT Sun Oct 10 2021 ...Gusty northerly winds and dry conditions late Sunday evening through late Tuesday afternoon for the interior areas of the North Bay mountains, the East Bay hills, and the East Bay valleys... ...Gusty northerly winds and dry conditions early Monday morning through late Tuesday afternoon for the Santa Cruz Mountains... ...Gusty northerly winds and dry conditions Monday morning through late Tuesday afternoon for the Mountains of San Benito and interior Monterey County, and the Santa Lucia Mountains... .A strong inside slider will move southward through the Great Basin late Sunday into Monday, with increasing offshore gradients expected. North winds will quickly increase late Sunday night, especially over more interior portions of the North and East Bay, before spreading into the Santa Cruz Mountains as well as the Mountains of San Benito and interior Monterey County, the Santa Lucia Mountains, and the Los Padres National Forest. The gradient becomes north to northeast Monday night into Tuesday. These winds, combined with low humidity and dry fuels, may result in critical fire weather conditions. CAZ507-510-511-101815- /O.UPG.KMTR.FW.A.0007.211011T0600Z-211013T0000Z/ /O.NEW.KMTR.FW.W.0008.211011T0600Z-211013T0000Z/ North Bay Mountains-East Bay Interior Valleys- East Bay Hills and the Diablo Range- 303 AM PDT Sun Oct 10 2021 ...RED FLAG WARNING IN EFFECT FROM 11 PM THIS EVENING TO 5 PM PDT TUESDAY FOR GUSTY NORTH TO NORTHEAST WINDS AND LOW HUMIDITY FOR THE INTERIOR NORTH BAY MOUNTAINS, EAST BAY HILLS, AND THE EAST BAY VALLEYS... The National Weather Service in San Francisco has issued a Red Flag Warning for gusty north to northeast winds and low humidity, which is in effect from 11 PM this evening to 5 PM PDT Tuesday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zone 507 North Bay Mountains, Fire Weather Zone 510 East Bay Interior Valleys and Fire Weather Zone 511 East Bay Hills and the Diablo Range. * TIMING...Sunday night into Tuesday. Strong winds will be more widespread during the day Monday. * WINDS...North to Northeast 15 to 25 mph with gusts 35 to 45 mph, locally higher gusts up to 60 mph. Strongest winds are expected along the eastern areas of Napa, Contra Costa, and Alameda counties. * HUMIDITY...Minimum day time humidities 10-20 percent. Overnight recoveries 20-40 percent for the interior mountains of Sonoma County, Napa County, and East Bay, but higher recoveries of 50-65 percent for coastal mountains. * IMPACTS...Any fire starts would likely see rapid spread due to dry fuels, low humidity and gusty winds. Outdoor burning is not recommended. 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. && $$ CAZ512-101815- /O.UPG.KMTR.FW.A.0007.211011T0900Z-211013T0000Z/ /O.NEW.KMTR.FW.W.0008.211011T0900Z-211013T0000Z/ Santa Cruz Mountains- 303 AM PDT Sun Oct 10 2021 ...RED FLAG WARNING IN EFFECT FROM 2 AM MONDAY TO 5 PM PDT TUESDAY FOR GUSTY NORTH WINDS AND LOW HUMIDITY FOR THE SANTA CRUZ MOUNTAINS... The National Weather Service in San Francisco has issued a Red Flag Warning for gusty north to northeast winds, which is in effect from 2 AM Monday to 5 PM PDT Tuesday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zone 512 Santa Cruz Mountains. * WINDS...North 15 to 30 mph with gusts 40 to 50 mph. Locally higher gusts up to 60 mph are possible over peaks. * HUMIDITY...15-25 percent except up to 40 percent closer to the coast. Overnight recoveries 30-50 percent. * IMPACTS...Any fire starts would likely see rapid spread due to dry fuels, low humidity and gusty winds. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ CAZ517-518-101815- /O.UPG.KMTR.FW.A.0007.211011T1200Z-211013T0000Z/ /O.NEW.KMTR.FW.W.0008.211011T1200Z-211013T0000Z/ Santa Lucia Mountains and Los Padres National Forest- Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park- 303 AM PDT Sun Oct 10 2021 ...RED FLAG WARNING IN EFFECT FROM 5 AM MONDAY TO 5 PM PDT TUESDAY FOR GUSTY NORTH TO NORTHEAST WINDS AND LOW HUMIDITY FOR THE MOUNTAINS OF SAN BENITO COUNTY AND INTERIOR MONTEREY COUNTY INCLUDING PINNACLES NATIONAL PARK AS WELL AS THE SANTA LUCIA MOUNTAINS AND THE LOS PADRES NATIONAL FOREST... The National Weather Service in San Francisco has issued a Red Flag Warning for gusty north to northeast winds and low humidity, which is in effect from 5 AM Monday to 5 PM PDT Tuesday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zone 517 Santa Lucia Mountains and Los Padres National Forest and Fire Weather Zone 518 Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park. * WIND...North to Northeast 15 to 30 mph with gusts 40 to 50 mph. * HUMIDITY...Overnight recoveries 20-40%. Minimum daytime humidities 10-20%. * IMPACTS...Any fire starts would likely see rapid spread due to dry fuels, low humidity and gusty winds. Outdoor burning is not recommended. 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. && $$ Bingaman
6 follow-up statements
929 WWUS86 KMTR 101916 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 1216 PM PDT Sun Oct 10 2021 ...Gusty northerly winds and dry conditions late Sunday evening through late Tuesday afternoon for the interior areas of the North Bay mountains, the East Bay hills, and the East Bay valleys... ...Gusty northerly winds and dry conditions early Monday morning through late Tuesday afternoon for the Santa Cruz Mountains... ...Gusty northerly winds and dry conditions Monday morning through late Tuesday afternoon for the Mountains of San Benito and interior Monterey County, and the Santa Lucia Mountains... .A strong inside slider will move southward through the Great Basin late Sunday into Monday, with increasing offshore gradients expected. North winds will quickly increase late Sunday night, especially over more interior portions of the North and East Bay, before spreading into the Santa Cruz Mountains as well as the Mountains of San Benito and interior Monterey County, the Santa Lucia Mountains, and the Los Padres National Forest. The gradient becomes north to northeast Monday night into Tuesday. These winds, combined with low humidity and dry fuels, may result in critical fire weather conditions. CAZ507-510-511-111200- /O.CON.KMTR.FW.W.0008.211011T0600Z-211013T0000Z/ North Bay Mountains-East Bay Interior Valleys- East Bay Hills and the Diablo Range- 1216 PM PDT Sun Oct 10 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO 5 PM PDT TUESDAY FOR GUSTY NORTH TO NORTHEAST WINDS AND LOW HUMIDITY FOR THE INTERIOR NORTH BAY MOUNTAINS, EAST BAY HILLS, AND THE EAST BAY VALLEYS... * AFFECTED AREA...Fire Weather Zone 507 North Bay Mountains, Fire Weather Zone 510 East Bay Interior Valleys and Fire Weather Zone 511 East Bay Hills and the Diablo Range. * TIMING...Tonight into Tuesday. Strong winds will be more widespread during the day Monday. * WINDS...North 15 to 30 mph with gusts up to 50 mph. Locally higher gusts 60 to 70 mph over the favored peaks. Strongest winds are expected along the eastern areas of Napa, Contra Costa, and Alameda counties. * HUMIDITY...Minimum day time humidities 10-20 percent. Overnight recoveries 20-40 percent for the interior mountains of Sonoma County, Napa County, and East Bay, but higher recoveries of 50- 65 percent for coastal mountains. * IMPACTS...Any fire starts would likely see rapid spread due to dry fuels, low humidity and gusty winds. Outdoor burning is not recommended. 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. && $$ CAZ512-111200- /O.CON.KMTR.FW.W.0008.211011T0900Z-211013T0000Z/ Santa Cruz Mountains- 1216 PM PDT Sun Oct 10 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 2 AM MONDAY TO 5 PM PDT TUESDAY FOR GUSTY NORTH WINDS AND LOW HUMIDITY FOR THE SANTA CRUZ MOUNTAINS... * AFFECTED AREA...Fire Weather Zone 512 Santa Cruz Mountains. * WINDS...North 15 to 30 mph with gusts up to 50 mph. Locally higher gusts up to 60 mph are possible over peaks. * HUMIDITY...15-25 percent except up to 40 percent closer to the coast. Overnight recoveries 30-50 percent. * IMPACTS...Any fire starts would likely see rapid spread due to dry fuels, low humidity and gusty winds. Outdoor burning is not recommended. 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. && $$ CAZ517-518-111200- /O.CON.KMTR.FW.W.0008.211011T1200Z-211013T0000Z/ Santa Lucia Mountains and Los Padres National Forest- Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park- 1216 PM PDT Sun Oct 10 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 5 AM MONDAY TO 5 PM PDT TUESDAY FOR GUSTY NORTH TO NORTHEAST WINDS AND LOW HUMIDITY FOR THE MOUNTAINS OF SAN BENITO COUNTY AND INTERIOR MONTEREY COUNTY INCLUDING PINNACLES NATIONAL PARK AS WELL AS THE SANTA LUCIA MOUNTAINS AND THE LOS PADRES NATIONAL FOREST... * AFFECTED AREA...Fire Weather Zone 517 Santa Lucia Mountains and Los Padres National Forest and Fire Weather Zone 518 Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park. * WIND...North to Northeast 15 to 30 mph with gusts 40 to 50 mph. * HUMIDITY...Overnight recoveries 20-40%. Minimum daytime humidities 10-20%. * IMPACTS...Any fire starts would likely see rapid spread due to dry fuels, low humidity and gusty winds. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ Palmer
062 WWUS86 KMTR 111204 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 504 AM PDT Mon Oct 11 2021 ...Gusty northerly winds and dry conditions late Sunday evening through late Tuesday afternoon for the interior areas of the North Bay mountains, the East Bay hills, and the East Bay valleys... ...Gusty northerly winds and dry conditions early Monday morning through late Tuesday afternoon for the Santa Cruz Mountains... ...Gusty northerly winds and dry conditions Monday morning through late Tuesday afternoon for the Mountains of San Benito and interior Monterey County, and the Santa Lucia Mountains... .A strong inside slider will move southward through the Great Basin late Sunday into Monday, with increasing offshore gradients expected. North winds will quickly increase late Sunday night, especially over more interior portions of the North and East Bay, before spreading into the Santa Cruz Mountains as well as the Mountains of San Benito and interior Monterey County, the Santa Lucia Mountains, and the Los Padres National Forest. The gradient becomes north to northeast Monday night into Tuesday. These winds, combined with low humidity and dry fuels, may result in critical fire weather conditions. CAZ507-510-511-112200- /O.CON.KMTR.FW.W.0008.000000T0000Z-211013T0000Z/ North Bay Mountains-East Bay Interior Valleys- East Bay Hills and the Diablo Range- 504 AM PDT Mon Oct 11 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT TUESDAY FOR GUSTY NORTH TO NORTHEAST WINDS AND LOW HUMIDITY FOR THE INTERIOR NORTH BAY MOUNTAINS, EAST BAY HILLS, AND THE EAST BAY VALLEYS... * AFFECTED AREA...Fire Weather Zone 507 North Bay Mountains, Fire Weather Zone 510 East Bay Interior Valleys and Fire Weather Zone 511 East Bay Hills and the Diablo Range. * TIMING...Tonight into Tuesday. Strong winds will be more widespread during the day Monday. * WINDS...North 15 to 30 mph with gusts up to 50 mph. Locally higher gusts 60 to 70 mph over the favored peaks. Strongest winds are expected along the eastern areas of Napa, Contra Costa, and Alameda counties. * HUMIDITY...Minimum day time humidities 10-20 percent. Overnight recoveries 20-40 percent for the interior mountains of Sonoma County, Napa County, and East Bay, but higher recoveries of 50- 65 percent for coastal mountains. * IMPACTS...Any fire starts would likely see rapid spread due to dry fuels, low humidity and gusty winds. Outdoor burning is not recommended. 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. && $$ CAZ512-112200- /O.CON.KMTR.FW.W.0008.000000T0000Z-211013T0000Z/ Santa Cruz Mountains- 504 AM PDT Mon Oct 11 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT TUESDAY FOR GUSTY NORTH WINDS AND LOW HUMIDITY FOR THE SANTA CRUZ MOUNTAINS... * AFFECTED AREA...Fire Weather Zone 512 Santa Cruz Mountains. * WINDS...North 15 to 30 mph with gusts up to 50 mph. Locally higher gusts up to 60 mph are possible over peaks. * HUMIDITY...15-25 percent except up to 40 percent closer to the coast. Overnight recoveries 30-50 percent. * IMPACTS...Any fire starts would likely see rapid spread due to dry fuels, low humidity and gusty winds. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ CAZ517-518-112200- /O.CON.KMTR.FW.W.0008.000000T0000Z-211013T0000Z/ Santa Lucia Mountains and Los Padres National Forest- Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park- 504 AM PDT Mon Oct 11 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT TUESDAY FOR GUSTY NORTH TO NORTHEAST WINDS AND LOW HUMIDITY FOR THE MOUNTAINS OF SAN BENITO COUNTY AND INTERIOR MONTEREY COUNTY INCLUDING PINNACLES NATIONAL PARK AS WELL AS THE SANTA LUCIA MOUNTAINS AND THE LOS PADRES NATIONAL FOREST... * AFFECTED AREA...Fire Weather Zone 517 Santa Lucia Mountains and Los Padres National Forest and Fire Weather Zone 518 Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park. * WIND...North to Northeast 15 to 30 mph with gusts 40 to 50 mph. * HUMIDITY...Overnight recoveries 20-40%. Minimum daytime humidities 10-20%. * IMPACTS...Any fire starts would likely see rapid spread due to dry fuels, low humidity and gusty winds. Outdoor burning is not recommended. 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. && $$ ED
856 WWUS86 KMTR 112147 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco Bay Area 247 PM PDT Mon Oct 11 2021 Default overview section CAZ507-510-511-120600- /O.CON.KMTR.FW.W.0008.000000T0000Z-211013T0000Z/ North Bay Mountains-East Bay Interior Valleys- East Bay Hills and the Diablo Range- 247 PM PDT Mon Oct 11 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT TUESDAY FOR GUSTY NORTH TO NORTHEAST WINDS AND LOW HUMIDITY FOR THE INTERIOR NORTH BAY MOUNTAINS, EAST BAY HILLS, AND THE EAST BAY VALLEYS... * AFFECTED AREA...Fire Weather Zone 507 North Bay Mountains, Fire Weather Zone 510 East Bay Interior Valleys and Fire Weather Zone 511 East Bay Hills and the Diablo Range. * TIMING...Tonight into Tuesday. Strong winds will be more widespread during the day Monday. * WINDS...North 15 to 30 mph with gusts up to 50 mph. Locally higher gusts 60 to 70 mph over the favored peaks. Strongest winds are expected along the eastern areas of Napa, Contra Costa, and Alameda counties. * HUMIDITY...Minimum day time humidities 10-20 percent. Overnight recoveries 20-40 percent for the interior mountains of Sonoma County, Napa County, and East Bay, but higher recoveries of 50- 65 percent for coastal mountains. * IMPACTS...Any fire starts would likely see rapid spread due to dry fuels, low humidity and gusty winds. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ CAZ512-120600- /O.CON.KMTR.FW.W.0008.000000T0000Z-211013T0000Z/ Santa Cruz Mountains- 247 PM PDT Mon Oct 11 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT TUESDAY FOR GUSTY NORTH WINDS AND LOW HUMIDITY FOR THE SANTA CRUZ MOUNTAINS... * AFFECTED AREA...Fire Weather Zone 512 Santa Cruz Mountains. * WINDS...North 15 to 30 mph with gusts up to 50 mph. Locally higher gusts up to 60 mph are possible over peaks. * HUMIDITY...15-25 percent except up to 40 percent closer to the coast. Overnight recoveries 30-50 percent. * IMPACTS...Any fire starts would likely see rapid spread due to dry fuels, low humidity and gusty winds. Outdoor burning is not recommended. 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. && $$ CAZ517-518-120600- /O.CON.KMTR.FW.W.0008.000000T0000Z-211013T0000Z/ Santa Lucia Mountains and Los Padres National Forest- Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park- 247 PM PDT Mon Oct 11 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT TUESDAY FOR GUSTY NORTH TO NORTHEAST WINDS AND LOW HUMIDITY FOR THE MOUNTAINS OF SAN BENITO COUNTY AND INTERIOR MONTEREY COUNTY INCLUDING PINNACLES NATIONAL PARK AS WELL AS THE SANTA LUCIA MOUNTAINS AND THE LOS PADRES NATIONAL FOREST... * AFFECTED AREA...Fire Weather Zone 517 Santa Lucia Mountains and Los Padres National Forest and Fire Weather Zone 518 Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park. * WIND...North to Northeast 15 to 30 mph with gusts 40 to 50 mph. * HUMIDITY...Overnight recoveries 20-40%. Minimum daytime humidities 10-20%. * IMPACTS...Any fire starts would likely see rapid spread due to dry fuels, low humidity and gusty winds. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
001 WWUS86 KMTR 120557 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 1057 PM PDT Mon Oct 11 2021 .A strong low pressure system over the Great Basin is resulting in strong northerly winds over elevated portions of the North Bay, East Bay, and the mountains of Santa Cruz, San Benito, and interior Monterey Counties. These winds, combined with low humidity and dry fuels, may result in critical fire weather conditions through Tuesday afternoon. CAZ507-510-511-121400- /O.CON.KMTR.FW.W.0008.000000T0000Z-211013T0000Z/ North Bay Mountains-East Bay Interior Valleys- East Bay Hills and the Diablo Range- 1057 PM PDT Mon Oct 11 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT TUESDAY FOR GUSTY NORTH TO NORTHEAST WINDS AND LOW HUMIDITY FOR THE INTERIOR NORTH BAY MOUNTAINS, EAST BAY HILLS, AND THE EAST BAY VALLEYS... * AFFECTED AREA...Fire Weather Zone 507 North Bay Mountains, Fire Weather Zone 510 East Bay Interior Valleys and Fire Weather Zone 511 East Bay Hills and the Diablo Range. * TIMING...Tonight into Tuesday. * WINDS...North 15 to 30 mph with gusts up to 40 mph. Locally higher gusts around 50 mph over the favored peaks. Strongest winds are expected along the eastern areas of Napa, Contra Costa, and Alameda counties. * HUMIDITY...Minimum day time humidities 10-20 percent. Overnight recoveries 20-40 percent for the interior mountains of Sonoma County, Napa County, and East Bay, but higher recoveries of 50- 65 percent for coastal mountains. * IMPACTS...Any fire starts would likely see rapid spread due to dry fuels, low humidity and gusty winds. Outdoor burning is not recommended. 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. && $$ CAZ512-121400- /O.CON.KMTR.FW.W.0008.000000T0000Z-211013T0000Z/ Santa Cruz Mountains- 1057 PM PDT Mon Oct 11 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT TUESDAY FOR GUSTY NORTH WINDS AND LOW HUMIDITY FOR THE SANTA CRUZ MOUNTAINS... * AFFECTED AREA...Fire Weather Zone 512 Santa Cruz Mountains. * TIMING...Tonight into Tuesday. * WINDS...North 15 to 30 mph with gusts up to 40 mph. * HUMIDITY...15-25 percent except up to 40 percent closer to the coast. Overnight recoveries 30-50 percent. * IMPACTS...Any fire starts would likely see rapid spread due to dry fuels, low humidity and gusty winds. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ CAZ517-518-121400- /O.CON.KMTR.FW.W.0008.000000T0000Z-211013T0000Z/ Santa Lucia Mountains and Los Padres National Forest- Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park- 1057 PM PDT Mon Oct 11 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT TUESDAY FOR GUSTY NORTH TO NORTHEAST WINDS AND LOW HUMIDITY FOR THE MOUNTAINS OF SAN BENITO COUNTY AND INTERIOR MONTEREY COUNTY INCLUDING PINNACLES NATIONAL PARK AS WELL AS THE SANTA LUCIA MOUNTAINS AND THE LOS PADRES NATIONAL FOREST... * AFFECTED AREA...Fire Weather Zone 517 Santa Lucia Mountains and Los Padres National Forest and Fire Weather Zone 518 Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park. * TIMING...Tonight into Tuesday. * WIND...North to Northeast 15 to 30 mph with gusts 40 to 50 mph. * HUMIDITY...Overnight recoveries 20-40%. Minimum daytime humidities 10-20%. * IMPACTS...Any fire starts would likely see rapid spread due to dry fuels, low humidity and gusty winds. Outdoor burning is not recommended. 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. && $$
785 WWUS86 KMTR 121354 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 654 AM PDT Tue Oct 12 2021 .A strong low pressure system over the Great Basin is resulting in strong northerly winds over elevated portions of the North Bay, East Bay, and the mountains of Santa Cruz, San Benito, and interior Monterey Counties. These winds, combined with low humidity and dry fuels, may result in critical fire weather conditions through Tuesday afternoon. CAZ507-510-511-130000- /O.CON.KMTR.FW.W.0008.000000T0000Z-211013T0000Z/ North Bay Mountains-East Bay Interior Valleys- East Bay Hills and the Diablo Range- 654 AM PDT Tue Oct 12 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT THIS AFTERNOON FOR GUSTY NORTH TO NORTHEAST WINDS AND LOW HUMIDITY FOR THE INTERIOR NORTH BAY MOUNTAINS, EAST BAY HILLS, AND THE EAST BAY VALLEYS... * AFFECTED AREA...Fire Weather Zone 507 North Bay Mountains, Fire Weather Zone 510 East Bay Interior Valleys and Fire Weather Zone 511 East Bay Hills and the Diablo Range. * TIMING...Tuesday through 5 PM. * WINDS...North 15 to 30 mph with gusts up to 40 mph. Locally higher gusts around 50 mph over the favored peaks. Strongest winds are expected along the eastern areas of Napa, Contra Costa, and Alameda counties. * HUMIDITY...Humidities will be highest this morning before dropping through the day. Minimum daytime humidities 10-20 percent. * IMPACTS...Any fire starts would likely see rapid spread due to dry fuels, low humidity and gusty winds. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ CAZ512-130000- /O.CON.KMTR.FW.W.0008.000000T0000Z-211013T0000Z/ Santa Cruz Mountains- 654 AM PDT Tue Oct 12 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT THIS AFTERNOON FOR GUSTY NORTH WINDS AND LOW HUMIDITY FOR THE SANTA CRUZ MOUNTAINS... * AFFECTED AREA...Fire Weather Zone 512 Santa Cruz Mountains. * TIMING...Tuesday through 5 PM. * WINDS...North 15 to 30 mph with gusts up to 40 mph. * HUMIDITY...Humidities will be highest this morning before dropping through the day. Minimum daytime humidities 15-25 percent except up to 40 percent closer to the coast. * IMPACTS...Any fire starts would likely see rapid spread due to dry fuels, low humidity and gusty winds. Outdoor burning is not recommended. 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. && $$ CAZ517-518-130000- /O.CON.KMTR.FW.W.0008.000000T0000Z-211013T0000Z/ Santa Lucia Mountains and Los Padres National Forest- Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park- 654 AM PDT Tue Oct 12 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT THIS AFTERNOON FOR GUSTY NORTH TO NORTHEAST WINDS AND LOW HUMIDITY FOR THE MOUNTAINS OF SAN BENITO COUNTY AND INTERIOR MONTEREY COUNTY INCLUDING PINNACLES NATIONAL PARK AS WELL AS THE SANTA LUCIA MOUNTAINS AND THE LOS PADRES NATIONAL FOREST... * AFFECTED AREA...Fire Weather Zone 517 Santa Lucia Mountains and Los Padres National Forest and Fire Weather Zone 518 Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park. * TIMING...Tuesday through 5 PM. * WIND...North to Northeast 15 to 30 mph with gusts 40 to 50 mph. * HUMIDITY...Humidities will be highest this morning before dropping through the day. Minimum daytime humidities 10-20 percent. * IMPACTS...Any fire starts would likely see rapid spread due to dry fuels, low humidity and gusty winds. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
397 WWUS86 KMTR 122357 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 457 PM PDT Tue Oct 12 2021 CAZ507-510-511-130100- /O.EXP.KMTR.FW.W.0008.000000T0000Z-211013T0000Z/ North Bay Mountains-East Bay Interior Valleys- East Bay Hills and the Diablo Range- 457 PM PDT Tue Oct 12 2021 ...RED FLAG WARNING WILL EXPIRE AT 5 PM PDT THIS AFTERNOON FOR THE INTERIOR NORTH BAY MOUNTAINS, EAST BAY HILLS, AND THE EAST BAY VALLEYS... Northerly winds decreasing tonight with good humidity recoveries tonight and Wednesday morning. The Red Flag Warning will be allowed to expire at 5 pm PDT. $$ CAZ512-130100- /O.EXP.KMTR.FW.W.0008.000000T0000Z-211013T0000Z/ Santa Cruz Mountains- 457 PM PDT Tue Oct 12 2021 ...RED FLAG WARNING WILL EXPIRE AT 5 PM PDT THIS AFTERNOON FOR THE SANTA CRUZ MOUNTAINS... Northerly winds decreasing tonight with good humidity recoveries tonight and Wednesday morning. The Red Flag Warning will be allowed to expire at 5 pm PDT. $$ CAZ517-518-130100- /O.EXP.KMTR.FW.W.0008.000000T0000Z-211013T0000Z/ Santa Lucia Mountains and Los Padres National Forest- Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park- 457 PM PDT Tue Oct 12 2021 ...RED FLAG WARNING WILL EXPIRE AT 5 PM PDT THIS AFTERNOON FOR THE MOUNTAINS OF SAN BENITO COUNTY AND INTERIOR MONTEREY COUNTY INCLUDING PINNACLES NATIONAL PARK AS WELL AS THE SANTA LUCIA MOUNTAINS AND THE LOS PADRES NATIONAL FOREST... Northerly winds decreasing tonight with moderate to good humidity recoveries Wednesday morning. The Red Flag Warning will be allowed to expire at 5 pm PDT. $$
The office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 10, 2:43 AM PDT | Gale Warning | MTR | 48 hr |
Nearby
Red Flag Warnings in California, 2021Every red flag warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.