San Jose, CA Weather Alerts

...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.

The Fire Weather Watch has been replaced. Please see the latest information from NWS San Francisco CA on this developing situation.

...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. Gusts up to
65 mph in the highest peaks of the North Bay Interior Mountains
and the Diablo Range.

* RELATIVE HUMIDITY...As low as 9 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.

* WHAT...Dangerously hot conditions with temperatures up to 105.

* WHERE...San Francisco Bay Shoreline, East Bay Interior Valley,
Santa Cruz Mountains, Santa Clara Valley, Santa Lucia
Mountains and Los Padres National Forest, Mountains of San
Benito and Interior Monterey County.

* WHEN...Until 11 PM PDT Saturday.

* IMPACTS...Extreme heat will significantly increase the
potential for heat related illnesses, particularly for those
working or participating in outdoor activities.

* ADDITIONAL DETAILS...Major HeatRisk (level 3 of 4) in the
valleys. Extreme HeatRisk (level 4 of 4) in the mountains.

* WHAT...Dangerously hot conditions with temperatures up to 102.

* WHERE...San Francisco Bay Shoreline, East Bay Interior Valley,
Santa Cruz Mountains, Santa Clara Valley, Santa Lucia Mountains
and Los Padres National Forest, Mountains of San Benito and
Interior Monterey County.

* WHEN...Until 11 PM PDT Friday.

* IMPACTS...Extreme heat will significantly increase the
potential for heat related illnesses, particularly for those
working or participating in outdoor activities.

* WHAT...High temperatures in the mid to upper 90s expected.

* WHERE...Santa Cruz Mountains, Santa Clara Valley, including
San Jose and Eastern Santa Clara Hills.

* WHEN...From 11 AM to 8 PM PDT Monday.

* IMPACTS...Moderate HeatRisk in the warned areas. This level of
heat affects most individuals sensitive to heat, especially
those without effective cooling and/or adequate hydration.

* WHAT...Dangerously hot conditions with temperatures up to 110
with limited overnight cooling in higher elevations expected.

* WHERE...North Bay Interior Mountains, East Bay Interior
Valleys, Santa Clara Valley, including San Jose, Eastern Santa
Clara Hills and East Bay Hills.

* WHEN...From 11 AM Wednesday to 8 PM PDT Friday.

* IMPACTS...Most individuals will be at risk for heat-related
illnesses without effective cooling or adequate hydration,
especially with prolonged outdoor exposure. Without effective
cooling and/or adequate hydration, heat-related illnesses
including heat stroke will be a risk to everyone. Overnight
lows will warm as well leading to poor relief from the heat
specifically in elevated terrain and interior areas.

* ADDITIONAL DETAILS...An exceptionally dangerous situation will
unfold over the next couple of days we move through this
deadly heat event for inland areas. Another couple days of
temperatures well above normal will lead to compounding
effects among people and infrastructure, with the possibility
of numerous heat related fatalities.

* WHAT...Dangerously hot conditions with temperatures in the
upper 90's to 115F expected. Limited overnight relief with low
temperatures in the mid 60s to low 80s. Resultant widespread
Major HeatRisk, with areas of Extreme HeatRisk.

* WHERE...Marin Coastal Range, Sonoma Coastal Range, North Bay
Interior Mountains, North Bay Interior Valleys, East Bay
Interior Valleys, Santa Cruz Mountains, Santa Clara Valley,
Eastern Santa Clara Hills, East Bay Hills, Southern Salinas
Valley, Santa Lucia Mountains and Los Padres National Forest,
and Mountains of San Benito and Interior Monterey.

* WHEN...Until 11 PM PDT Wednesday.

* IMPACTS...Most individuals will be at risk for heat-related
illnesses without effective cooling or adequate hydration,
especially with prolonged outdoor exposure. Without effective
cooling and/or adequate hydration, heat-related illnesses
including heat stroke will be a risk to everyone. Overnight
lows will warm as well leading to poor relief from the heat
specifically in elevated terrain and interior areas.

* ADDITIONAL DETAILS...An exceptionally dangerous situation is
expected to unfold during this potentially historic and deadly
heat event. Several days of temperatures well above normal
will lead to compounding effects among people and
infrastructure, with the possibility of numerous heat related
fatalities. It cannot be stressed enough that while one day at
these temperatures may be manageable for some, an event of
this scale, magnitude, and longevity will likely rival
anything we've seen in the last 18 years. Heat is the number
one weather related killer in the United States. By this
weekend, it is VERY LIKELY that we add to that statistic if
preparations are not taken seriously.

* WHAT...Dangerously hot conditions with temperatures in the upper
90's to 110F expected. Limited overnight relief with low
temperatures in the mid 60s to low 80s. Resultant widespread
Major HeatRisk, with areas of Extreme HeatRisk.

* WHERE...Marin Coastal Range, Sonoma Coastal Range, North Bay
Interior Mountains, North Bay Interior Valleys, East Bay
Interior Valleys, Santa Cruz Mountains, Santa Clara Valley,
Eastern Santa Clara Hills, East Bay Hills, Southern Salinas
Valley, Santa Lucia Mountains and Los Padres National Forest,
and Mountains of San Benito and Interior Monterey.

* WHEN...From 11 AM Tuesday to 11 PM PDT Friday.

* IMPACTS...Most individuals will be at risk for heat-related
illnesses without effective cooling or adequate hydration,
especially with prolonged outdoor exposure. Without effective
cooling and/or adequate hydration, heat-related illnesses
including heat stroke will be a risk to everyone. Overnight lows
will warm as well leading to poor relief from the heat
specifically in elevated terrain and interior areas.

* WHAT...Dangerously hot, well above average temperatures with
limited overnight cooling.

* WHERE...Areas away from the immediate coast in the Bay Area and
Central Coast.

* WHEN...From Tuesday morning through Friday evening.

* IMPACTS...Most individuals will be at risk for heat-related
illnesses without effective cooling or adequate hydration,
especially with prolonged outdoor exposure. Without effective
cooling and/or adequate hydration, heat-related illnesses
including heat stroke will be a risk to everyone. Overnight lows
will warm as well leading to poor relief from the heat
specifically in elevated terrain and interior areas.