Posted October 14, 2017 at 5:07:00 PM PDT

...RED FLAG WARNING REMAINS IN EFFECT THROUGH 8 AM PDT SUNDAY FOR

THE NORTH BAY MOUNTAINS...



...RED FLAG WARNING NOW IN EFFECT THROUGH 8 AM PDT SUNDAY FOR THE

EAST BAY HILLS AND THE DIABLO RANGE...



...RED FLAG WARNING FOR THE NORTH BAY VALLEYS WILL BE ALLOWED TO

EXPIRE AT 5 PM PDT SATURDAY...



.Northeast to east winds had decreased in most areas late Saturday

afternoon and are expected to remain mostly light through

Saturday evening. However, easterly winds are forecast to

increase in the hills of the North and East Bay late tonight.

Winds in the hills tonight are not expected to be as strong as

last night, but still strong enough to create critical fire

weather conditions when combined with the warm and very dry

airmass and dry fuels. Expect very poor overnight humidity

recoveries in the North Bay Mountains and East Bay Hills tonight

with relative humidity values remaining below 30 percent, and even

below 20 percent on the higher ridges. Minimum relative humidity

values on Sunday are forecast to be 10 to 20 percent and as low as

the single digits in the hills. In addition, high temperatures on

Sunday are forecast to be warmer than Saturday by about five

degrees. Overnight relative humidity recoveries are expected to

be better for North Bay Valleys and winds will mostly be light in

the valleys.

Warm and very dry conditions are forecast to continue into Monday,

but winds will generally be light, even in the hills, from mid

morning Sunday through Monday.



...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 AM PDT SUNDAY FOR

LOW RELATIVE HUMIDITIES AND OFFSHORE WINDS FOR FIRE WEATHER ZONE

507...



* AFFECTED AREA...Fire weather zone 507. North Bay Mountains.



* WIND...North to northeast winds of 10 to 15 mph with gusts of 25

and with isolated gusts to 30 mph possible on highest ridges and

peaks. Strongest winds expected in the Napa Hills and hills of

eastern Sonoma County between midnight and sunrise early Sunday

morning.



* HUMIDITY...Minimum daytime values between 5 to 15 percent

with night time recovery values between 15 to 35 percent.



* HIGHEST THREAT...The Napa County hills, around Mount Saint

Helena, hills of eastern Sonoma County.



* IMPACTS...Any fires that develop will likely spread rapidly.

Outdoor burning is not recommended.