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October 5-6, 2019
Warning in effect for elevations above 1000 feet Saturday evening through 10AM Sunday morning.
Marin County, CA -- The National Weather Service has issued a Red Flag Warning for the North Bay Mountains and other parts of the Bay Area above 1000 feet, which is in effect from 8 PM Saturday to 10 AM Sunday.
A Red Flag Warning means that critical fire weather conditions are expected during this time frame. The National Weather Service has forecasted a combination of strong off shore winds with gusts to 20-35 miles per hour and low relative humidities ranging from 18-28%.
The affected area includes higher terrain areas of Marin, Napa, Sonoma and East Bay counties. The concerns of this weather system are that fires that develop will likely spread rapidly.
The following land use restrictions are in effect for the Marin Municipal Water District, Mount Tamalpais State Park, Marin Open Space, and The Point Reyes National Seashore during the Red Flag conditions.
Residents are advised to exercise extreme caution during the Red Flag Warning because a simple spark could cause a major wildfire, including the use of equipment and machinery as well as smoking.
URGENT - FIRE WEATHER MESSAGE
National Weather Service San Francisco CA, Fri Oct 4 2019
Red Flag Warning Saturday Night for the North Bay Mountains...
A warming trend will develop by Saturday with temperatures into the 80s. As the sun goes down Saturday night a burst of dry northerly winds will pass over the mountains of Napa County with gusts to 35 mph across the hills. This will occur with little or no humidity recovery. The winds will ease by Sunday morning but the weather will remain hot and dry through Sunday afternoon.
RED FLAG WARNING REMAINS IN EFFECT FROM 8 PM SATURDAY TO 10 AM PDT SUNDAY FOR DRY OFFSHORE WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONE 507...
* AFFECTED AREA... Fire weather zone 507. The North Bay Mountains above 1000 feet in Napa, Sonoma and Marin Counties.
Note: The original message incorrectly noted on one line that the Red Flag Warning was in effect until Wednesday. The current forecast has the Warning in effect until Sunday at 10AM. The message also indicated that Marin fire agencies were staffing additional fire engines for this event. This was not correct. We apologize for any confusion this caused.