Severe weather alert
Red Flag (Fire Weather) Warning
California
Official updates
From National Weather ServiceLast updated 9 hours ago
RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT SATURDAY FOR STRONG OFFSHORE WINDS AND CRITICALLY DRY CONDITIONS FOR ALL INTERIOR BAY AREA ZONES, AS WELL AS THE CITY OF SAN FRANCISCO, THE SAN FRANCISCO PENINSULA COAST, AND THE BAY SHORELINE
...RED FLAG WARNING NOW IN EFFECT THURSDAY NIGHT THROUGH SATURDAY
EVENING FOR THE BAY AREA AND CENTRAL COAST AS STRONG OFFSHORE
WINDS AND CRITICALLY DRY CONDITIONS ARE EXPECTED TO DEVELOP...
.Gusty north-northeast winds are expected to develop as an
"inside slider" system moves into the Great Basin this weekend.
Humidities will still be on the higher end at the start of the
event on Thursday, but are expected to quickly dry out as low as
the upper single digits Friday and Saturday. Peak winds are
expected overnight tonight into Friday morning for the North Bay
and Bay Area. Most areas across the region will be affected to
some degree, with likely exceptions being the immediate Big Sur
coast and the Marin/Sonoma coast. Winds largely on the order of
25-35 mph can be expected with gusts to 50 mph, isolated gusts to
65 mph across the highest terrain and ridgetops, most notably the
North Bay Interior Mountains and the Diablo Range.
* AFFECTED AREA...Fire Weather Zone 006 San Francisco, Fire
Weather Zone 502 Marin Coastal Range, Fire Weather Zone 503
Sonoma Coastal Range, Fire Weather Zone 504 North Bay Interior
Mountains, Fire Weather Zone 506 North Bay Interior Valleys,
Fire Weather Zone 508 San Francisco Bay Shoreline, Fire
Weather Zone 509 San Francisco Peninsula Coast, Fire Weather
Zone 510 East Bay Interior Valleys, Fire Weather Zone 512
Santa Cruz Mountains, Fire Weather Zone 513 Santa Clara Valley
Including San Jose, Fire Weather Zone 514 Eastern Santa Clara
Hills, Fire Weather Zone 515 East Bay Hills and Fire Weather
Zone 529 Northern Monterey Bay.
* TIMING...11 PM Thursday until 5 PM Saturday
* WINDS...North 25 to 35 mph with gusts up to 50 mph.
* RELATIVE HUMIDITY...As low as 8 percent.
* LIGHTNING...None.
* IMPACTS...The combination of gusty winds and low humidity can
cause fire to rapidly grow in size and intensity. Outdoor
burning is not recommended. Despite recent cool weather and
high humidity, we are expecting a widespread and prolonged
offshore wind event which will likely dry fuels out very
quickly given their volatility over the past several weeks.
...RED FLAG WARNING NOW IN EFFECT THURSDAY NIGHT THROUGH SATURDAY
EVENING FOR THE BAY AREA AND CENTRAL COAST AS STRONG OFFSHORE
WINDS AND CRITICALLY DRY CONDITIONS ARE EXPECTED TO DEVELOP...
.Gusty north-northeast winds are expected to develop as an
"inside slider" system moves into the Great Basin this weekend.
Humidities will still be on the higher end at the start of the
event on Thursday, but are expected to quickly dry out as low as
the upper single digits Friday and Saturday. Peak winds are
expected overnight tonight into Friday morning for the North Bay
and Bay Area. Most areas across the region will be affected to
some degree, with likely exceptions being the immediate Big Sur
coast and the Marin/Sonoma coast. Winds largely on the order of
25-35 mph can be expected with gusts to 50 mph, isolated gusts to
65 mph across the highest terrain and ridgetops, most notably the
North Bay Interior Mountains and the Diablo Range.
* AFFECTED AREA...Fire Weather Zone 006 San Francisco, Fire
Weather Zone 502 Marin Coastal Range, Fire Weather Zone 503
Sonoma Coastal Range, Fire Weather Zone 504 North Bay Interior
Mountains, Fire Weather Zone 506 North Bay Interior Valleys,
Fire Weather Zone 508 San Francisco Bay Shoreline, Fire
Weather Zone 509 San Francisco Peninsula Coast, Fire Weather
Zone 510 East Bay Interior Valleys, Fire Weather Zone 512
Santa Cruz Mountains, Fire Weather Zone 513 Santa Clara Valley
Including San Jose, Fire Weather Zone 514 Eastern Santa Clara
Hills, Fire Weather Zone 515 East Bay Hills and Fire Weather
Zone 529 Northern Monterey Bay.
* TIMING...11 PM Thursday until 5 PM Saturday
* WINDS...North 25 to 35 mph with gusts up to 50 mph.
* RELATIVE HUMIDITY...As low as 8 percent.
* LIGHTNING...None.
* IMPACTS...The combination of gusty winds and low humidity can
cause fire to rapidly grow in size and intensity. Outdoor
burning is not recommended. Despite recent cool weather and
high humidity, we are expecting a widespread and prolonged
offshore wind event which will likely dry fuels out very
quickly given their volatility over the past several weeks.
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