Alert archive / California / Red Flag Warnings in 2017
Red Flag Warning 7, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this red flag warning at Oct 10, 2017, 11:14 AM PDT for 5 counties in California. It took effect at Oct 11, 2017, 5:00 PM PDT. It was in force for 24 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 10, 2017, 11:14 AM PDT (18:14 UTC)
- In effect from
- Oct 11, 2017, 5:00 PM PDT
- Expired
- Oct 12, 2017, 5:00 PM PDT
- In force
- 24 hr
- Issued by
- NWS San Francisco Bay Area, CA
Counties 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), 33 km from the middle of the area, began a volume at 18:20 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, 6.2 hours before the alert went out and 102 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
- 2360 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 66 m²/s²
- 0-3 km storm-relative helicity
- 194 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
243 WWUS86 KMTR 101814 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 1114 AM PDT Tue Oct 10 2017 ...RED FLAG WARNING FOR WEDNESDAY AFTERNOON THROUGH THURSDAY AFTERNOON FOR NORTH AND EAST BAY HILLS/MOUNTAINS... .Increasing northerly winds and drying conditions are forecast to return to the region late Wednesday and persist through Thursday afternoon in wake of a weak, dry frontal passage. Low humidity and gusty northerly winds will combine with dry fuels to produce critical fire weather conditions, especially in higher elevations of the North and East Bay Hills/Mountains. CAZ507-110400- /O.NEW.KMTR.FW.W.0007.171012T0000Z-171013T0000Z/ North Bay Mountains- 1114 AM PDT Tue Oct 10 2017 ...RED FLAG WARNING IN EFFECT FROM 5 PM WEDNESDAY TO 5 PM PDT THURSDAY FOR OFFSHORE WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONE 507... The National Weather Service in San Francisco has issued a Red Flag Warning, which is in effect from 5 PM Wednesday to 5 PM PDT Thursday. * AFFECTED AREA...Fire weather zone 507. * WIND...Northeast winds of 15 to 30 MPH with gusts to 45 MPH. * HUMIDITY...Minimum daytime values between 10-20 percent with night time recovery values between 30-40 percent. * HIGHEST THREAT...In the Napa County hills as well as around Mount Saint Helena and the hills of Marin around Mount Tamalpais. * IMPACTS...Any fires that develop will likely spread rapidly. 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. && $$ CAZ511-110400- /O.NEW.KMTR.FW.W.0007.171012T0600Z-171013T0000Z/ East Bay Hills and the Diablo Range- 1114 AM PDT Tue Oct 10 2017 ...RED FLAG WARNING IN EFFECT FROM 11 PM WEDNESDAY TO 5 PM PDT THURSDAY FOR OFFSHORE WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONE 511... The National Weather Service in San Francisco has issued a Red Flag Warning, which is in effect from 11 PM Wednesday to 5 PM PDT Thursday. * AFFECTED AREA...Fire weather zone 511. * WIND...Northeast winds of 15 to 30 MPH with gusts to 45 MPH, especially in elevations above 1500 ft. * HUMIDITY...Minimum daytime values between 10-20 percent with night time recovery values between 30-40 percent, especially in elevations above 1500 ft. * HIGHEST THREAT...Around Mount Diablo and the East Bay Hills between Interstate 880 and 680. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
9 follow-up statements
776 WWUS86 KMTR 110404 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 904 PM PDT Tue Oct 10 2017 ...RED FLAG WARNING FOR WEDNESDAY AFTERNOON THROUGH THURSDAY AFTERNOON FOR NORTH AND EAST BAY HILLS/MOUNTAINS... .Increasing northerly winds and drying conditions are forecast to return to the region late Wednesday and persist through Thursday afternoon in wake of a weak, dry frontal passage. Low humidity and gusty northerly winds will combine with dry fuels to produce critical fire weather conditions, especially in higher elevations of the North and East Bay Hills/Mountains. CAZ507-111800- /O.CON.KMTR.FW.W.0007.171012T0000Z-171013T0000Z/ North Bay Mountains- 904 PM PDT Tue Oct 10 2017 ...RED FLAG WARNING REMAINS IN EFFECT FROM 5 PM WEDNESDAY TO 5 PM PDT THURSDAY FOR OFFSHORE WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONE 507... * AFFECTED AREA...Fire weather zone 507. * WIND...Northeast winds of 15 to 30 MPH with gusts to 45 MPH. * HUMIDITY...Minimum daytime values between 10-20 percent with night time recovery values between 30-40 percent. * HIGHEST THREAT...In the Napa County hills as well as around Mount Saint Helena and the hills of Marin around Mount Tamalpais. * IMPACTS...Any fires that develop will likely spread rapidly. 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. && $$ CAZ511-111800- /O.CON.KMTR.FW.W.0007.171012T0600Z-171013T0000Z/ East Bay Hills and the Diablo Range- 904 PM PDT Tue Oct 10 2017 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 PM WEDNESDAY TO 5 PM PDT THURSDAY FOR OFFSHORE WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONE 511... * AFFECTED AREA...Fire weather zone 511. * WIND...Northeast winds of 15 to 30 MPH with gusts to 45 MPH, especially in elevations above 1500 ft. * HUMIDITY...Minimum daytime values between 10-20 percent with night time recovery values between 30-40 percent, especially in elevations above 1500 ft. * HIGHEST THREAT...Around Mount Diablo and the East Bay Hills between Interstate 880 and 680. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
569 WWUS86 KMTR 110414 CCA RFWMTR URGENT - FIRE WEATHER MESSAGE...CORRECTED National Weather Service San Francisco CA 914 PM PDT Tue Oct 10 2017 ...RED FLAG WARNING FOR WEDNESDAY AFTERNOON THROUGH THURSDAY AFTERNOON FOR NORTH AND EAST BAY HILLS/MOUNTAINS... .Increasing northerly winds and drying conditions are forecast to return to the region late Wednesday and persist through Thursday afternoon in wake of a weak, dry frontal passage. Low humidity and gusty northerly winds will combine with dry fuels to produce critical fire weather conditions, especially in higher elevations of the North and East Bay Hills/Mountains. CAZ507-111800- /O.COR.KMTR.FW.W.0007.171012T0000Z-171013T0000Z/ North Bay Mountains- 914 PM PDT Tue Oct 10 2017 ...RED FLAG WARNING REMAINS IN EFFECT FROM 5 PM WEDNESDAY TO 5 PM PDT THURSDAY FOR OFFSHORE WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONE 507... * AFFECTED AREA...Fire weather zone 507. * WIND...North to northeast winds of 20 to 30 MPH with gusts to 50 MPH. * HUMIDITY...Minimum daytime values between 10-20 percent with night time recovery values between 30-40 percent. * HIGHEST THREAT...In the Napa County hills as well as around Mount Saint Helena and the hills of Marin around Mount Tamalpais. * IMPACTS...Any fires that develop will likely spread rapidly. 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. && $$ CAZ511-111800- /O.COR.KMTR.FW.W.0007.171012T0600Z-171013T0000Z/ East Bay Hills and the Diablo Range- 914 PM PDT Tue Oct 10 2017 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 PM WEDNESDAY TO 5 PM PDT THURSDAY FOR OFFSHORE WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONE 511... * AFFECTED AREA...Fire weather zone 511. * WIND...North to northeast winds of 15 to 30 MPH with gusts to 45 MPH, especially in elevations above 1500 ft. * HUMIDITY...Minimum daytime values between 10-20 percent with night time recovery values between 30-40 percent, especially in elevations above 1500 ft. * HIGHEST THREAT...Around Mount Diablo and the East Bay Hills between Interstate 880 and 680. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
126 WWUS86 KMTR 110936 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 236 AM PDT Wed Oct 11 2017 ...RED FLAG WARNING FOR WEDNESDAY AFTERNOON THROUGH THURSDAY AFTERNOON FOR NORTH AND EAST BAY HILLS/MOUNTAINS... .Increasing northerly winds and drying conditions are forecast to return to the region later today and persist through Thursday afternoon in wake of a weak, dry frontal passage. Low humidity and gusty northerly winds will combine with dry fuels to produce critical fire weather conditions, especially in higher elevations of the North and East Bay Hills/Mountains. CAZ507-120200- /O.CON.KMTR.FW.W.0007.171012T0000Z-171013T0000Z/ North Bay Mountains- 236 AM PDT Wed Oct 11 2017 ...RED FLAG WARNING REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM PDT THURSDAY FOR OFFSHORE WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONE 507... * AFFECTED AREA...Fire weather zone 507. * WIND...North to northeast winds of 20 to 30 MPH with local gusts over 50 MPH. * HUMIDITY...Minimum daytime values between 10-20 percent with night time recovery values between 30-40 percent. * HIGHEST THREAT...In the Napa County hills as well as around Mount Saint Helena and the hills of Marin around Mount Tamalpais. * IMPACTS...Any fires that develop will likely spread rapidly. 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. && $$ CAZ511-120200- /O.CON.KMTR.FW.W.0007.171012T0600Z-171013T0000Z/ East Bay Hills and the Diablo Range- 236 AM PDT Wed Oct 11 2017 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO 5 PM PDT THURSDAY FOR OFFSHORE WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONE 511... * AFFECTED AREA...Fire weather zone 511. * WIND...North to northeast winds of 20 to 30 MPH with gusts to 50 MPH, especially in elevations above 1500 ft. * HUMIDITY...Minimum daytime values between 10-20 percent with night time recovery values between 30-40 percent, especially in elevations above 1500 ft. * HIGHEST THREAT...Around Mount Diablo and the East Bay Hills between Interstate 880 and 680. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
794 WWUS86 KMTR 111931 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 1231 PM PDT Wed Oct 11 2017 ...RED FLAG WARNING THROUGH THURSDAY AFTERNOON FOR NORTH BAY MOUNTAINS, EAST BAY HILLS AND SANTA CRUZ MOUNTAINS... .Increasing northerly winds and drying conditions are forecast to return to the region later today and persist through Thursday afternoon in wake of a weak, dry frontal passage. Low humidity and gusty northerly winds will combine with dry fuels to produce critical fire weather conditions, especially in higher elevations of the North Bay Mountains, East Bay Hills and Santa Cruz Mountains. CAZ512-120400- /O.EXA.KMTR.FW.W.0007.171012T0600Z-171013T0000Z/ Santa Cruz Mountains- 1231 PM PDT Wed Oct 11 2017 ...RED FLAG WARNING IN EFFECT FROM 11 PM THIS EVENING TO 5 PM PDT THURSDAY FOR OFFSHORE WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONE 511... The National Weather Service in San Francisco has issued a Red Flag Warning, which is in effect from 11 PM this evening to 5 PM PDT Thursday. * AFFECTED AREA...Fire weather zone 511. * WIND...North to northeast winds of 20 to 30 MPH with gusts to 50 MPH, especially in elevations above 1500 ft. * HUMIDITY...Minimum daytime values between 10-20 percent with night time recovery values between 30-40 percent, especially in elevations above 1500 ft. * HIGHEST THREAT...In elevations above 1500 ft. * IMPACTS...Any fires that develop will likely spread rapidly. 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. && $$ CAZ507-120400- /O.CON.KMTR.FW.W.0007.171012T0000Z-171013T0000Z/ North Bay Mountains- 1231 PM PDT Wed Oct 11 2017 ...RED FLAG WARNING REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM PDT THURSDAY FOR OFFSHORE WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONE 507... * AFFECTED AREA...Fire weather zone 507. * WIND...North to northeast winds of 20 to 30 MPH with local gusts over 50 MPH. * HUMIDITY...Minimum daytime values between 10-20 percent with night time recovery values between 30-40 percent. * HIGHEST THREAT...In the Napa County hills as well as around Mount Saint Helena and the hills of Marin around Mount Tamalpais. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ CAZ511-120400- /O.CON.KMTR.FW.W.0007.171012T0600Z-171013T0000Z/ East Bay Hills and the Diablo Range- 1231 PM PDT Wed Oct 11 2017 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO 5 PM PDT THURSDAY FOR OFFSHORE WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONE 511... * AFFECTED AREA...Fire weather zone 511. * WIND...North to northeast winds of 20 to 30 MPH with gusts to 50 MPH, especially in elevations above 1500 ft. * HUMIDITY...Minimum daytime values between 10-20 percent with night time recovery values between 30-40 percent, especially in elevations above 1500 ft. * HIGHEST THREAT...Around Mount Diablo and the East Bay Hills between Interstate 880 and 680. * IMPACTS...Any fires that develop will likely spread rapidly. 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. && $$
679 WWUS86 KMTR 112303 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 403 PM PDT Wed Oct 11 2017 ...RED FLAG WARNING THROUGH THURSDAY AFTERNOON FOR ELEVATIONS ABOVE 1000 FEET IN THE SAN FRANCISCO... .Increasing northerly winds and drying conditions are forecast to return to the region Wednesday evening and persist through Thursday afternoon in wake of a weak, dry frontal passage. Strongest winds will occur between late Wednesday evening and mid morning on Thursday. Low humidity and gusty northerly winds will combine with dry fuels to produce critical fire weather conditions, especially in higher elevations of the North Bay Mountains, East Bay Hills, Santa Cruz Mountains, the Santa Lucia Mountains, and the mountains of San Benito County and Interior Monterey County. CAZ517-518-121300- /O.EXA.KMTR.FW.W.0007.171012T0600Z-171013T0000Z/ Santa Lucia Mountains and Los Padres National Forest- Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park- 403 PM PDT Wed Oct 11 2017 ...RED FLAG WARNING IN EFFECT FROM 11 PM WEDNESDAY EVENING TO 5 PM PDT THURSDAY FOR OFFSHORE WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 517 AND 518... The National Weather Service San Francisco Bay Area has issued a Red Flag Warning, which is in effect from 11 PM Wednesday evening to 5 PM PDT Thursday. * AFFECTED AREA...Fire weather zoneS 517 AND 518. * WIND...North to northeast winds of 15 to 25 mph with gusts to 45 mph, especially at elevations above 1500 ft. * HUMIDITY...Minimum daytime values between 10-20 percent with night time recovery values between 25-35 percent, especially in elevations above 1500 ft. * HIGHEST THREAT...The Santa Lucia Range above the Big Sur Coast as well as higher ridges and peaks elsewhere across Monterey and San Benito Counties. * IMPACTS...Any fires that develop will likely spread rapidly. 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. && $$ CAZ507-121300- /O.CON.KMTR.FW.W.0007.171012T0000Z-171013T0000Z/ North Bay Mountains- 403 PM PDT Wed Oct 11 2017 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT THURSDAY FOR OFFSHORE WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONE 507... * AFFECTED AREA...Fire weather zone 507. * WIND...North to northeast winds of 20 to 30 MPH with local gusts over 50 MPH. * HUMIDITY...Minimum daytime values between 10-20 percent with night time recovery values between 25-35 percent. * HIGHEST THREAT...The Napa County hills, around Mount Saint Helena, hills of eastern Sonoma County, and the hills of Marin County around Mount Tamalpais. * IMPACTS...Any fires that develop will likely spread rapidly. 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. && $$ CAZ511-512-121300- /O.CON.KMTR.FW.W.0007.171012T0600Z-171013T0000Z/ East Bay Hills and the Diablo Range-Santa Cruz Mountains- 403 PM PDT Wed Oct 11 2017 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 PM WEDNESDAY EVENING TO 5 PM PDT THURSDAY FOR OFFSHORE WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONE 511... * AFFECTED AREA...Fire weather zone 511. * WIND...North to northeast winds of 15 to 30 MPH with gusts as high as 50 MPH, especially in elevations above 1500 ft. * HUMIDITY...Minimum daytime values between 10-20 percent with night time recovery values between 25-35 percent, especially in elevations above 1500 ft. * HIGHEST THREAT...At elevations above 1500 ft. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
289 WWUS86 KMTR 112306 AAA RFWMTR URGENT - FIRE WEATHER MESSAGE...UPDATED National Weather Service San Francisco CA 406 PM PDT Wed Oct 11 2017 ...RED FLAG WARNING THROUGH THURSDAY AFTERNOON FOR ELEVATIONS ABOVE 1000 FEET IN THE SAN FRANCISCO BAY AREA AS WELL AS ELEVATIONS ABOVE 1000 FEET ACROSS MONTEREY COUNTY AND SAN BENITO COUNTY... .Increasing northerly winds and drying conditions are forecast to return to the region Wednesday evening and persist through Thursday afternoon in wake of a weak, dry frontal passage. Strongest winds will occur between late Wednesday evening and mid morning on Thursday. Low humidity and gusty northerly winds will combine with dry fuels to produce critical fire weather conditions, especially in higher elevations of the North Bay Mountains, East Bay Hills, Santa Cruz Mountains, the Santa Lucia Mountains, and the mountains of San Benito County and Interior Monterey County. CAZ507-120715- /O.CON.KMTR.FW.W.0007.171012T0000Z-171013T0000Z/ North Bay Mountains- 406 PM PDT Wed Oct 11 2017 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT THURSDAY FOR OFFSHORE WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONE 507... * AFFECTED AREA...Fire weather zone 507. * WIND...North to northeast winds of 20 to 30 MPH with local gusts over 50 MPH. * HUMIDITY...Minimum daytime values between 10-20 percent with night time recovery values between 25-35 percent. * HIGHEST THREAT...The Napa County hills, around Mount Saint Helena, hills of eastern Sonoma County, and the hills of Marin County around Mount Tamalpais. * IMPACTS...Any fires that develop will likely spread rapidly. 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. && $$ CAZ511-512-517-518-120715- /O.CON.KMTR.FW.W.0007.171012T0600Z-171013T0000Z/ East Bay Hills and the Diablo Range-Santa Cruz Mountains- Santa Lucia Mountains and Los Padres National Forest- Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park- 406 PM PDT Wed Oct 11 2017 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO 5 PM PDT THURSDAY FOR OFFSHORE WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 517 AND 518... * AFFECTED AREA...Fire weather zoneS 517 AND 518. * WIND...North to northeast winds of 15 to 25 mph with gusts to 45 mph, especially at elevations above 1500 ft. * HUMIDITY...Minimum daytime values between 10-20 percent with night time recovery values between 25-35 percent, especially in elevations above 1500 ft. * HIGHEST THREAT...The Santa Lucia Range above the Big Sur Coast as well as higher ridges and peaks elsewhere across Monterey and San Benito Counties. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
768 WWUS86 KMTR 120435 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 935 PM PDT Wed Oct 11 2017 ...RED FLAG WARNING THROUGH THURSDAY AFTERNOON FOR ELEVATIONS ABOVE 1000 FEET IN THE SAN FRANCISCO BAY AREA AS WELL AS ELEVATIONS ABOVE 1000 FEET ACROSS MONTEREY COUNTY AND SAN BENITO COUNTY... .Increasing northerly winds and drying conditions are forecast to return to the region by late Wednesday evening and persist into Thursday. Strongest winds will occur between midnight Wednesday night and mid morning on Thursday. Low humidity and gusty northerly winds will combine with dry fuels to produce critical fire weather conditions, especially across higher elevations of the North Bay Mountains, East Bay Hills, Santa Cruz Mountains, the Santa Lucia Mountains, and the mountains of San Benito County and Interior Monterey County. CAZ511-512-517-518-130000- /O.CON.KMTR.FW.W.0007.171012T0600Z-171013T0000Z/ East Bay Hills and the Diablo Range-Santa Cruz Mountains- Santa Lucia Mountains and Los Padres National Forest- Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park- 935 PM PDT Wed Oct 11 2017 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT THURSDAY FOR OFFSHORE WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 517 AND 518... * AFFECTED AREA...Fire weather zoneS 517 AND 518. * WIND...North to northeast winds of 15 to 25 mph with gusts to 45 mph, especially at elevations above 1500 ft. * HUMIDITY...Minimum daytime values between 10-20 percent with night time recovery values between 25-35 percent, especially in elevations above 1500 ft. * HIGHEST THREAT...The Santa Lucia Range above the Big Sur Coast as well as higher ridges and peaks elsewhere across Monterey and San Benito Counties. * IMPACTS...Any fires that develop will likely spread rapidly. 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. && $$ CAZ507-130000- /O.CON.KMTR.FW.W.0007.000000T0000Z-171013T0000Z/ North Bay Mountains- 935 PM PDT Wed Oct 11 2017 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT THURSDAY FOR OFFSHORE WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONE 507... * AFFECTED AREA...Fire weather zone 507. * WIND...North to northeast winds of 20 to 30 MPH with local gusts over 50 MPH. * HUMIDITY...Minimum daytime values between 10-20 percent with night time recovery values between 25-35 percent. * HIGHEST THREAT...The Napa County hills, around Mount Saint Helena, hills of eastern Sonoma County, and the hills of Marin County around Mount Tamalpais. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
754 WWUS86 KMTR 121245 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 545 AM PDT Thu Oct 12 2017 ...RED FLAG WARNING THROUGH THURSDAY AFTERNOON FOR ELEVATIONS ABOVE 1000 FEET IN THE SAN FRANCISCO BAY AREA AS WELL AS ELEVATIONS ABOVE 1000 FEET ACROSS MONTEREY COUNTY AND SAN BENITO COUNTY... ...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY AFTERNOON THROUGH SATURDAY EVENING FOR GUSTY OFFSHORE WIND AND LOW HUMIDITY FOR NORTH BAY MOUNTAINS AND DIABLO RANGE... .Low humidity and gusty northerly winds will combine with dry fuels to produce critical fire weather conditions, especially across higher elevations of the North Bay Mountains, East Bay Hills, Santa Cruz Mountains, the Santa Lucia Mountains, and the mountains of San Benito County and Interior Monterey County. Another round of very dry conditions and gusty offshore winds will arrive late Friday though early Saturday for the North Bay Mountains and Diablo Range. CAZ507-511-130000- /O.NEW.KMTR.FW.A.0004.171014T0000Z-171015T0600Z/ /O.CON.KMTR.FW.W.0007.000000T0000Z-171013T0000Z/ North Bay Mountains-East Bay Hills and the Diablo Range- 545 AM PDT Thu Oct 12 2017 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT THIS AFTERNOON FOR WIND AND LOW HUMIDITY FOR FIRE WEATHER ZONES 507 AND 511... ...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY AFTERNOON THROUGH SATURDAY EVENING FOR GUSTY OFFSHORE WIND AND LOW HUMIDITY FOR FIRE WEATHER ZONES 507 AND 511... The National Weather Service in San Francisco has issued a Fire Weather Watch, which is in effect from Friday afternoon through Saturday evening. * AFFECTED AREA...Fire weather zones 507 and 511. * WIND...North to northeast winds of 20 to 30 MPH with isolated local gusts up to 50 MPH early Thursday. North to northeast winds 25 to 35 MPH with local gusts approaching 60 MPH Friday night. * HUMIDITY...Minimum daytime values between 10-20 percent with night time recovery values between 25-35 percent. * HIGHEST THREAT...The Napa County hills, around Mount Saint Helena, hills of eastern Sonoma County, and the hills of Marin County around Mount Tamalpais. * IMPACTS...Any fires that develop will likely spread rapidly. 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. A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$ CAZ512-517-518-130000- /O.CON.KMTR.FW.W.0007.000000T0000Z-171013T0000Z/ Santa Cruz Mountains- Santa Lucia Mountains and Los Padres National Forest- Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park- 545 AM PDT Thu Oct 12 2017 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT THIS AFTERNOON FOR WIND AND LOW HUMIDITY FOR FIRE WEATHER ZONES 512, 517, AND 518... * AFFECTED AREA...Fire weather zones 512, 517, and 518. * WIND...North to northeast winds of 15 to 25 mph with isolated gusts to 45 mph, especially at elevations above 1500 ft. * HUMIDITY...Minimum daytime values between 10-20 percent with night time recovery values between 25-35 percent, especially in elevations above 1500 ft. * HIGHEST THREAT...The Santa Lucia Range above the Big Sur Coast as well as higher ridges and peaks elsewhere across Monterey and San Benito Counties. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
221 WWUS86 KMTR 130018 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 518 PM PDT Thu Oct 12 2017 ...RED FLAG WARNING IN EFFECT FROM 5 PM FRIDAY THROUGH 11 PM SATURDAY FOR GUSTY OFFSHORE WINDS AND LOW HUMIDITY IN THE NORTH BAY MOUNTAINS AS WELL AS THE EAST BAY HILLS AND DIABLO RANGE... .Northerly winds will decrease for a time from Thursday evening through much of Friday, although local gusts up to 25 mph are still possible on higher ridges and peaks. North to northeast winds are then forecast to increase once again late Friday and become locally strong and gusty Friday night and Saturday. Strongest winds are expected to be at elevations above 1500 feet in the North Bay Mountains and East Bay hills on Friday night and Saturday morning. Winds are forecast to decrease by late Saturday. CAZ507-511-131300- /O.EXP.KMTR.FW.W.0007.000000T0000Z-171013T0000Z/ /O.UPG.KMTR.FW.A.0004.171014T0000Z-171015T0600Z/ /O.NEW.KMTR.FW.W.0008.171014T0000Z-171015T0600Z/ North Bay Mountains-East Bay Hills and the Diablo Range- 518 PM PDT Thu Oct 12 2017 ...RED FLAG WARNING IN EFFECT FROM 5 PM FRIDAY TO 11 PM PDT SATURDAY FOR LOCALLY STRONG AND GUSTY OFFSHORE WINDS AND LOW HUMIDITY... The National Weather Service San Francisco Bay Area has issued a Red Flag Warning, which is in effect from 5 PM Friday to 11 PM PDT Saturday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire weather zones 507 and 511...Elevations above 1000 feet in the North Bay Mountains and East Bay Hills. * WIND...North to northeast winds of 20 to 30 mph with gust of 40 to 50 mph with isolated gusts to 60 mph possible on highest ridges and peaks. Strongest winds are expected above 1500 feet from late Friday night into Saturday morning. * HUMIDITY...Minimum daytime values between 10-20 percent with night time recovery values between 25-35 percent. * HIGHEST THREAT...The Napa County hills, around Mount Saint Helena, hills of eastern Sonoma County, and the hills of Marin County around Mount Tamalpais. * IMPACTS...Any fires that develop will likely spread rapidly. 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. && $$ CAZ512-517-518-130130- /O.EXP.KMTR.FW.W.0007.000000T0000Z-171013T0000Z/ Santa Cruz Mountains- Santa Lucia Mountains and Los Padres National Forest- Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park- 518 PM PDT Thu Oct 12 2017 ...RED FLAG WARNING HAS EXPIRED FOR WIND AND LOW HUMIDITY FOR FIRE WEATHER ZONES 512, 517, AND 518... Winds have diminished in the Santa Cruz Mountains and across the higher elevations in Monterey and San Benito Counties. Therefore, the Red Flag Warning was allowed to expire at 5 pm Thursday. Another round of locally gusty offshore winds is forecast for the hills from Friday night into Saturday, along with low humidities. $$
Nearby
Red Flag Warnings in California, 2017Every red flag warning in 2017
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.