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What is a red flag warning?

A Red Flag Warning is issued for weather events which may result in extreme fire behavior that will occur within 24 hours. A Red Flag Warning is the highest alert. During these times extreme caution is urged by all residents, because a simple spark can cause a major wildfire. A Fire Weather Watch is one...

Poor Air Quality & Fire Weather Watch upgraded to Red Flag Warning, Wed-Thurs

Update: September 20th, 2:52 PM: The National Weather Service has upgraded and extended the Fire Weather Watch to a Red Flag Warning for the North Bay interior mountains. The warning is in effect beginning at 11:00 p.m. Wednesday (9/20) to 5:00 p.m. Thursday (9/21). Read the full warning. Original Post Fire Weather Watch The National...

Red Flag Warning for North Bay Interior Mountains through Tuesday night through Wednesday

The National Weather Service has issued a Red Flag Warning for North Bay Interior Mountains in effect from 11:00 PM Tuesday (8/29) to 8:00 PM Wednesday (8/30) due to forecasted gusty northerly winds and poor overnight humidity recovery. North wind speeds of 15 to 25 mph with gusts up to 40 mph are possible. The...

Red Flag Warning for North Bay Mountains through Tuesday, Wind Advisory through Monday

UPDATE 10/11, The National Weather Service upgraded the Fire Weather Watch to a RED FLAG WARNING for the North Bay Mountains is in effect through 5pm Tuesday - WIND ADVISORY in effect for the entire region 9am - 8pm Monday While no PG&E PSPS outages have been announced for Sonoma Valley, we encourage you to...

Weather Awareness - Red Flag Warning for North Bay Hills 11 PM Wed. - 11 AM Thurs.

The National Weather Service has issued a Red Flag Warning for gusty north to northeast winds and low humidity, which is in effect from 11 PM this evening (9/29) to 11 AM (9/30) Thursday for North Bay Mountains focused on the Vaca and Mayacamas ranges in Napa County and including the border area of Sonoma and...

Red Flag Warning & Possible PSPS for North Bay Hills Sunday 11 PM - Monday 8 PM

The National Weather Service upgraded the Fire Weather Watch issued yesterday to a Red Flag Warning for much of the Bay Area including the North Bay Hills due to dry northerly offshore winds that are expected to arrive at 11 pm Sunday night. The initial burst of winds will occur while humidity values remain fairly moist....

Weather Awareness - Fire Weather Watch upgraded to Red Flag Warning for North Bay Mountains 11 PM Sunday - 8 PM Monday

UPDATE 9/19 1:00 PM: The National Weather Service upgraded the Fire Weather Watch issued yesterday to a Red Flag Warning for much of the Bay Area including the North Bay Hills due to dry northerly offshore winds that are expected to arrive at 11 pm Sunday night. The initial burst of winds will occur while humidity...

UPDATE 2PM - Red Flag Warning Thursday (9/9) 5PM - Friday (9/10) 11AM

UPDATED 9/9, 2:00 PM: The National Weather Service upgraded the Fire Weather Watch issued yesterday to a Red Flag Warning for much of the Bay Area including all of Sonoma County for dry lightning potential from Thursday afternoon (9/9) through Friday morning (9/10). Thunderstorms will be more dry than wet, and given how dry vegetation...

August 17th - Red Flag Warning begins tonight, PSPS not expected to impact City of Sonoma

PG&E is expected to proactively shut off power to parts of Sonoma County, including some customers in Sonoma Valley tonight, Tuesday, August 17th. At this time, it appears that the City of Sonoma will not be impacted. Look up an address on the PG&E power outage map to see if a particular location is included in this...

CANCELLED - Fire Weather Watch for North Bay Mountains upgraded to Red Flag Warning Sunday, July 18th - Monday, July 19th

7/19, 8:00 am: THE RED FLAG WARNING HAS BEEN CANCELLED UPDATE 7/18, 11:00 am: The National Weather Service (NW S) in San Francisco has upgraded the Fire Weather Watch to a Red Flag Warning in the North Bay Mountains due to the increased chance of thunderstorms and potential for lighting. The Red Flag warning is...

Weather Awareness - Red Flag Warning Issued for North Bay Hills This Weekend

The National Weather Service has issued a Red Flag Warning for parts of the Bay Area including the North Bay Hills in effect from 11:00 p.m. tonight (Friday) to 6:00 a.m. Monday due to forecasted dry offshore winds out of the northeast, low humidity and dryer than normal vegetation. Wind speeds of 15 to 30...

Red Flag Warning & Wind Advisory Begins Sunday (12/6) 11PM - Monday (12/7) 11AM

UPDATE: The Red Flag Warning has been extended to Monday at 5:00 PM. The National Weather Service has issued a Red Flag Warning & Wind Advisory for much of the Bay Area including the Sonoma City and Valley and is in effect from 11:00 p.m. tonight (Sunday) to 11:00 a.m. tomorrow (Monday) due to forecasted...

Red Flag Warning & Potential Power Shutoff beginning Sunday (10/25)

The National Weather Service has issued a Red Flag Warning beginning Sunday at 11:00 AM for North Bay Mountains and 8:00 PM for all other locations. Winds are expected to be the strongest of the 2020 fire season with critically dry conditions. While the winds are currently forecasted to be strongest Sunday night into Monday...

10/21, 2:15PM: Red Flag Warning begins tonight, PSPS not expected to impact City of Sonoma

PG&E is expected to proactively shut off power to parts of Sonoma County, including some customers in Sonoma Valley tomorrow morning, Thursday, October 22nd. At this time, it appears that the City of Sonoma will not be impacted. Look up an address on the PG&E power outage map to see if a particular location is included in...

Red Flag Warning, Fire Weather Watch & PSPS "Watch" this week

Update 10/20, 10:00 AM - Pacific Gas and Electric Company (PG&E) is monitoring forecasted high winds and dry conditions due to arrive this week and has begun their advance notifications to customers in areas where PG&E may need to proactively turn off the power. The potential PSPS starting Thursday morning could impact a portion of Sonoma...

10/16, 3:30PM: Power Restored to City Customers, Red Flag Warning Extended

PG&E has restored power to customers in Sonoma city limits affected by the Public Safety Power Shutoff (PSPS) event and expects to restore power to all affected Sonoma County customers by 10:00 PM tonight (10/16) - weather and safety permitting. Please refer to PG&E’s PSPS Updates page for the most current outage map and power...

PG&E Planned Power Shutoff "WATCH" & Red Flag Warning This Week

UPDATED 10/13, 10:48 AM The National Weather Service has issued a 'Red Flag Warning' due to dry conditions and gusty winds in the North Bay Mountains beginning Wednesday, October 14th at 5:00 AM through Friday, October 16th at 11:00 AM. Due to these conditions, PG&E ‪has raised the Public Safety Power Shutoff (PSPS) potential to...

UPDATE 10/1: Red Flag Warning issued Through Saturday, 6:00 AM | Heat Advisory Through Friday, 8:00 PM

UPDATE 10/1, 1:45 PM: The National Weather Service has extended the Red Flag Warning through Saturday, October 3rd at 6:00 AM (originally Friday at 6:00 PM) and has extended the Heat Advisory through Friday, October 2nd at 8:00 PM (originally Thursday at 8:00 PM). ORIGINAL POST: Hot, dry...

UPDATE: Red Flag Warning Extended, Heat Advisory in Effect, Smoke Drift Expected

UPDATE: SUNDAY, 9/27, 11:40 AM Hot, dry and windy weather has led to several warnings and advisories for the North Bay Area. As evidenced by the Glass Fire in St. Helena this morning, any fires that develop will spread rapidly in these conditions. It is important that we all use extreme caution during periods of...

Red Flag Warning 10 PM Monday - 8 AM Wednesday / Flex Alert in Effect

Red Flag Warning Monday Night - Wednesday Morning The US National Weather Service has upgraded the Fire Weather Watch for the North Bay Mountains to a Red Flag Warning due to hot and dry conditions combined with increasing offshore winds starting at 10:00 PM Monday through 8:00 AM Wednesday. A Red Flag Warning means that...

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