Alert archive / California / Red Flag Warnings in 2018
Red Flag Warning 2, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this red flag warning at Jun 28, 2018, 10:07 AM PDT. It took effect at Jun 29, 2018, 11:00 PM PDT. It was in force for 40 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
- Jun 28, 2018, 10:07 AM PDT (17:07 UTC)
- In effect from
- Jun 29, 2018, 11:00 PM PDT
- Expired
- Jul 1, 2018, 3:00 PM PDT
- In force
- 40 hr
- Issued by
- NWS San Francisco Bay Area, CA
The text
As transmitted.
233 WWUS86 KMTR 281707 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 1007 AM PDT Thu Jun 28 2018 ...Gusty northerly winds coupled with low humidity values Friday Night through Saturday... .Dry northerly flow is forecast to develop over the North Bay during the day Friday with temperatures warming to above seasonal averages. Northeast winds will strengthen Friday night into early Saturday morning with poor relative humidity recoveries followed by even warmer and drier conditions during the day Saturday. The areas of greatest concern will be located in higher terrain of Napa County as well as far eastern Sonoma County. Any fire starts may spread rapidly in these conditions. Avoid activities that may lead to fire ignition, including lawn work, driving on grass, tossing cigarettes, lighting campfires or fireworks, especially Friday night into Saturday afternoon. CAZ507-290500- /O.NEW.KMTR.FW.W.0002.180630T0600Z-180701T0600Z/ North Bay Mountains- 1007 AM PDT Thu Jun 28 2018 ...RED FLAG WARNING IN EFFECT FROM 11 PM FRIDAY TO 11 PM PDT SATURDAY FOR GUSTY NORTHERLY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 507... The National Weather Service in San Francisco has issued a Red Flag Warning, which is in effect from 11 PM Friday to 11 PM PDT Saturday. * AFFECTED AREA...Fire weather zone 507, especially higher elevations of Napa County and far eastern Sonoma County. * WIND...Northerly winds of 15 to 30 mph with gusts to 40 mph. Isolated peaks and ridges could experience locally stronger winds, especially Friday night. * HUMIDITY...Minimum humidity readings of 10 to 20% will be common during the day, with the driest locations dropping into the single digit range during the warmest, driest, windiest times of the day. Overnight humidity recoveries will be poor and less than 30%. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning or other activities that may lead to fire creation are 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
663 WWUS86 KMTR 290344 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 844 PM PDT Thu Jun 28 2018 ...Gusty northerly winds coupled with low humidity values Friday Night through Saturday... .Dry northerly flow is forecast to develop over the North Bay during the day Friday with temperatures warming to above seasonal averages. Northeast winds will strengthen Friday night into early Saturday morning with poor relative humidity recoveries followed by even warmer and drier conditions during the day Saturday. The areas of greatest concern will be located in higher terrain of Napa County as well as far eastern Sonoma County. Any fire starts may spread rapidly in these conditions. Avoid activities that may lead to fire ignition, including lawn work, driving on grass, tossing cigarettes, lighting campfires or fireworks, especially Friday night into Saturday afternoon. CAZ507-291230- /O.CON.KMTR.FW.W.0002.180630T0600Z-180701T0600Z/ North Bay Mountains- 844 PM PDT Thu Jun 28 2018 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 PM FRIDAY TO 11 PM PDT SATURDAY FOR GUSTY NORTHERLY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 507... * AFFECTED AREA...Fire weather zone 507, especially higher elevations of Napa County and far eastern Sonoma County. * WIND...Northerly winds of 15 to 30 mph with gusts to 40 mph. Isolated peaks and ridges could experience locally stronger winds, especially Friday night. * HUMIDITY...Minimum humidity readings of 10 to 20% will be common during the day, with the driest locations dropping into the single digit range during the warmest, driest, windiest times of the day. Overnight humidity recoveries will be poor and less than 30%. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning or other activities that may lead to fire creation are 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. && $$
732 WWUS86 KMTR 291142 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 442 AM PDT Fri Jun 29 2018 ...Gusty northerly winds coupled with low humidity values tonight through Saturday... .Dry northerly flow is forecast to develop over the North Bay during the day today with temperatures warming to above seasonal averages. Northeast winds will strengthen tonight into early Saturday morning with poor relative humidity recoveries followed by even warmer and drier conditions during the day Saturday. The areas of greatest concern will be located in higher terrain of Napa County as well as far eastern Sonoma County. Any fire starts may spread rapidly in these conditions. Avoid activities that may lead to fire ignition, including lawn work, driving on grass, tossing cigarettes, lighting campfires or fireworks, especially tonight into Saturday afternoon. CAZ507-292300- /O.CON.KMTR.FW.W.0002.180630T0600Z-180701T0600Z/ North Bay Mountains- 442 AM PDT Fri Jun 29 2018 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO 11 PM PDT SATURDAY FOR GUSTY NORTHERLY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 507... * AFFECTED AREA...Fire weather zone 507, especially higher elevations of Napa County and far eastern Sonoma County. * WIND...Northerly winds of 15 to 30 mph with gusts to 40 mph. Isolated peaks and ridges could experience locally stronger winds, especially tonight. * HUMIDITY...Minimum humidity readings of 10 to 20% will be common during the day, with the driest locations dropping into the single digit range during the warmest, driest, windiest times of the day. Overnight humidity recoveries will be poor and less than 30%. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning or other activities that may lead to fire creation are 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. && $$
484 WWUS86 KMTR 291437 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 737 AM PDT Fri Jun 29 2018 ...Gusty northerly winds coupled with low humidity values tonight through Saturday... .Dry northerly flow is forecast to develop over the North Bay during the day today with temperatures warming to above seasonal averages. Northeast winds will strengthen tonight into early Saturday morning with poor relative humidity recoveries followed by even warmer and drier conditions during the day Saturday. The areas of greatest concern will be located in higher terrain of Napa County as well as far eastern Sonoma County. Any fire starts may spread rapidly in these conditions. Avoid activities that may lead to fire ignition, including lawn work, driving on grass, tossing cigarettes, lighting campfires or fireworks, especially tonight into Saturday afternoon. CAZ507-300245- /O.CON.KMTR.FW.W.0002.180630T0600Z-180701T0600Z/ North Bay Mountains- 737 AM PDT Fri Jun 29 2018 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO 11 PM PDT SATURDAY FOR GUSTY NORTHERLY WINDS AND LOW RELATIVE HUMIDITY FOR ELEVATIONS ABOVE 1000 FT IN NAPA COUNTY AND FAR EASTERN SONOMA COUNTY IN FIRE WEATHER ZONE 507... * AFFECTED AREA...Higher elevations of Napa County and far eastern Sonoma County. * WIND...Northerly winds of 15 to 30 mph with gusts to 40 mph. Isolated peaks and ridges could experience locally stronger winds, especially tonight. * HUMIDITY...Minimum humidity readings of 10 to 20% will be common during the day, with the driest locations dropping into the single digit range during the warmest, driest, windiest times of the day. Overnight humidity recoveries will be poor and less than 30%. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning or other activities that may lead to fire creation are 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. && $$
099 WWUS86 KMTR 300223 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 723 PM PDT Fri Jun 29 2018 ...Gusty northerly winds coupled with low humidity values tonight through Saturday... .Dry northerly winds will strengthen tonight into early Saturday morning with poor relative humidity recoveries tonight followed by even warmer and drier conditions during the day Saturday. The areas of greatest concern will be the higher terrain of Napa County as well as far eastern Sonoma County. Any fire starts may spread rapidly in these conditions. Avoid activities that may lead to fire ignition, including lawn work, driving on grass, tossing cigarettes, lighting campfires or fireworks, especially tonight through Saturday afternoon. CAZ507-301300- /O.CON.KMTR.FW.W.0002.180630T0600Z-180701T0600Z/ North Bay Mountains- 723 PM PDT Fri Jun 29 2018 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO 11 PM PDT SATURDAY FOR GUSTY NORTHERLY WINDS AND LOW RELATIVE HUMIDITY FOR ELEVATIONS ABOVE 1000 FT IN NAPA COUNTY AND FAR EASTERN SONOMA COUNTY IN FIRE WEATHER ZONE 507... * AFFECTED AREA...Higher elevations of Napa County and far eastern Sonoma County. * WIND...Northerly winds of 15 to 30 mph with gusts to 40 mph. Isolated peaks and ridges could experience locally stronger winds, especially late tonight. * HUMIDITY...Minimum humidity readings of 10 to 20% will be common during the day, with the driest locations dropping into the single digit range during the warmest, driest, windiest times of the day. Overnight humidity recoveries will be poor and less than 30%. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning or other activities that may lead to fire creation are 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. && $$
901 WWUS86 KMTR 301012 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 312 AM PDT Sat Jun 30 2018 CAZ507-302100- /O.CON.KMTR.FW.W.0002.000000T0000Z-180701T0600Z/ North Bay Mountains- 312 AM PDT Sat Jun 30 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS EVENING FOR GUSTY NORTHERLY WINDS AND LOW RELATIVE HUMIDITY FOR ELEVATIONS ABOVE 1000 FT IN NAPA COUNTY AND FAR EASTERN SONOMA COUNTY IN FIRE WEATHER ZONE 507... * AFFECTED AREA...Higher elevations of Napa County and far eastern Sonoma County. * WIND...Northerly winds of 15 to 30 mph with gusts to 40 mph. Isolated peaks and ridges could experience locally stronger winds, especially late tonight. * HUMIDITY...Minimum humidity readings of 10 to 20% will be common during the day, with the driest locations dropping into the single digit range during the warmest, driest, windiest times of the day. Overnight humidity recoveries will be poor and less than 30%. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning or other activities that may lead to fire creation are not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
744 WWUS86 KMTR 302001 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 101 PM PDT Sat Jun 30 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS EVENING FOR ELEVATIONS ABOVE 1000 FT IN NAPA COUNTY AND FAR EASTERN SONOMA COUNTY IN FIRE WEATHER ZONE 507... CAZ507-010600- /O.CON.KMTR.FW.W.0002.000000T0000Z-180701T0600Z/ North Bay Mountains- 101 PM PDT Sat Jun 30 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS EVENING FOR ELEVATIONS ABOVE 1000 FT IN NAPA COUNTY AND FAR EASTERN SONOMA COUNTY IN FIRE WEATHER ZONE 507... * AFFECTED AREA...Higher elevations of Napa County and far eastern Sonoma County. * WIND...Northerly winds of 10 to 20 mph with local gusts to 30 mph. * HUMIDITY...Minimum humidity readings of 10 to 20% will be common during the day, with the driest locations dropping into the single digit range during the warmest, driest, windiest times of the day. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning or other activities that may lead to fire creation are 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. && $$
161 WWUS86 KMTR 010419 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 919 PM PDT Sat Jun 30 2018 ...RED FLAG WARNING HAS BEEN EXTENDED UNTIL 3 PM PDT SUNDAY FOR ELEVATIONS ABOVE 1000 FT IN NAPA COUNTY AND FAR EASTERN SONOMA COUNTY IN FIRE WEATHER ZONE 507... CAZ507-011230- /O.EXT.KMTR.FW.W.0002.000000T0000Z-180701T2200Z/ North Bay Mountains- 919 PM PDT Sat Jun 30 2018 ...RED FLAG WARNING NOW IN EFFECT UNTIL 3 PM PDT SUNDAY FOR ELEVATIONS ABOVE 1000 FT IN NAPA COUNTY AND FAR EASTERN SONOMA COUNTY IN FIRE WEATHER ZONE 507... * AFFECTED AREA...Higher elevations of Napa County and far eastern Sonoma County. Area of greatest concern is northern and eastern Napa County. * WIND...Northerly winds of 10 to 20 mph with local gusts to 30 mph. Strongest winds expected in northern and eastern Napa County on Saturday night. Winds will decrease on Sunday morning and then switch to a westerly direction by late Sunday afternoon. * HUMIDITY...Humidity recoveries on Saturday night are expected to be poor once again, with some of the higher hills not expected to see recoveries above 30 percent. Minimum humidity values will be in the 10 to 20 percent range on Sunday. Increasing humidity is expected by late Sunday afternoon as winds shift to the southwest. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning or other activities that may lead to fire creation are not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
418 WWUS86 KMTR 011053 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 353 AM PDT Sun Jul 1 2018 ...RED FLAG WARNING HAS BEEN EXTENDED UNTIL 3 PM PDT SUNDAY FOR ELEVATIONS ABOVE 1000 FT IN NAPA COUNTY AND FAR EASTERN SONOMA COUNTY IN FIRE WEATHER ZONE 507... CAZ507-012200- /O.CON.KMTR.FW.W.0002.000000T0000Z-180701T2200Z/ North Bay Mountains- 353 AM PDT Sun Jul 1 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 3 PM PDT THIS AFTERNOON FOR ELEVATIONS ABOVE 1000 FT IN NAPA COUNTY AND FAR EASTERN SONOMA COUNTY IN FIRE WEATHER ZONE 507... * AFFECTED AREA...Higher elevations of Napa County and far eastern Sonoma County. Area of greatest concern is across northern and eastern Napa County. * WIND...Northerly winds of 10 to 20 mph with local gusts to 30 mph. Winds will diminish later this morning and then switch to a westerly direction by late afternoon. * HUMIDITY...Humidity recoveries through this morning are expected to be poor once again, with some of the higher hills not expected to see recoveries above 30 percent. Minimum humidity values will be in the 10 to 20 percent range on Sunday. Increasing humidity is expected by late Sunday afternoon as winds shift to the southwest. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning or other activities that may lead to fire creation are 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. && $$
369 WWUS86 KMTR 012154 RFWMTR URGENT - FIRE WEATHER MESSAGE National Weather Service San Francisco CA 254 PM PDT Sun Jul 1 2018 CAZ507-012300- /O.EXP.KMTR.FW.W.0002.000000T0000Z-180701T2200Z/ North Bay Mountains- 254 PM PDT Sun Jul 1 2018 ...RED FLAG WARNING WILL EXPIRE AT 3 PM PDT THIS AFTERNOON FOR ELEVATIONS ABOVE 1000 FT IN NAPA COUNTY AND FAR EASTERN SONOMA COUNTY IN FIRE WEATHER ZONE 507... Onshore winds and a deeper marine layer are resulting in an increase in relative humidity across the North Bay Mountains. Therefore, the Red Flag Warning will be allowed to expire at 3 pm PDT. Winds are expected to be mostly light over the next few days, except local gusty west to southwest winds during the afternoon and evening hours. $$
Nearby
Red Flag Warnings in California, 2018Every red flag warning in 2018
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.