Palo Alto, CA

3:05 PM PST on February 20, 2017 (GMT -0800)
almost Professorville | | Change Station

Elev 33 ft 37.44 °N, 122.15 °W | Updated 1 minute ago

Light Rain
Light Rain
56.5 °F
Feels Like 56.5 °F
N
0.0
Wind Variable Wind from ESE

Today
High -- | Low -- °F
--% Chance of Precip.
Yesterday
High -- | Low -- °F
Precip. -- in
Pressure 29.90 in
Visibility 3.0 miles
Clouds Scattered Clouds 1000 ft
Overcast 3500 ft
Dew Point 56 °F
Humidity 98%
Rainfall 1.48 in
Snow Depth Not available.
6:51 AM 5:53 PM
Waning Crescent, 30% visible
METAR KPAO 202247Z 11012KT 3SM -RA SCT010 OVC035 13/13 A2990
Pressure 29.90 in
Visibility 3.0 miles
Clouds Scattered Clouds 1000 ft
Overcast 3500 ft
Dew Point 56 °F
Humidity 98%
Rainfall 1.48 in
Snow Depth Not available.
6:51 AM 5:53 PM
Waning Crescent, 30% visible
METAR KPAO 202247Z 11012KT 3SM -RA SCT010 OVC035 13/13 A2990

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What may become known as the President’s Day Storm of 2017 barreled into the San Francisco Bay area on Monday morning. Heavy rains and localized flooding may develop across the region. High winds later Monday could bring down trees and cause widespread, prolonged power outages from the Bay Area toward Sacramento.

10-Day Weather Forecast

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Feb. 20, 2017 Rise Set
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Minimum magnitude displayed is 2.5.

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Station Location Temp. Windchill Dew Point Humidity Wind Precip. Elev Updated Type
                   

Watches & Warnings

Flash Flood Warning
Issued: 10:26 AM PST Feb. 20, 2017 – National Weather Service

The National Weather Service in the San Francisco Bay area has issued
a

* Flash Flood Warning for...
south central Alameda County in northern California...

* until 430 PM PST Monday

* at 1022 am PST, stream gages on Alameda creek are reporting
rapidly rising water levels which have surpassed local flood
stages in Niles Canyon and in the upper watershed above the Sunol
regional wilderness. Forecast streamflow suggest water levels will
continue to rise into moderate flood category. Additionally,
social media reports indicate rockfalls and slope stability issues
in the area.

* Some locations that will experience flooding include...
Niles Canyon, areas near Alameda creek and local tributary
creeks.

Precautionary/preparedness actions...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.


Lat... Lon 3761 12195 3761 12184 3760 12180 3758 12176
      3755 12175 3753 12177 3756 12180 3755 12183
      3752 12181 3750 12174 3749 12176 3749 12183
      3758 12191 3758 12194 3756 12195 3758 12200


Mws


1013 am PST Mon Feb 20 2017

The National Weather Service in the San Francisco Bay area has issued
a

* Flash Flood Warning for...
southeastern Santa Clara County in northern California...
northwestern San Benito County in central California...

* until 400 PM PST

* at 1007 am PST, stream gage reports indicated rapidly rising water
levels on Pacheco creek near Dunneville. Current water levels are
at 8.09 feet. Because of prior levee breaches, flooding begins
around 10 feet. The previously established flood stage is 12
feet. Streamflow forecasting suggests water levels may reach 19.2
feet by tonight around 10pm local time. Ponding of water on the
floodplain may already be occurring.

* Some locations that will experience flooding include...
Lovers Lane, Frazier Lake, soap/San Felipe Lake, and lower Pacheco
creek north of Hollister.

Precautionary/preparedness actions...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.


Lat... Lon 3711 12127 3683 12127 3692 12152 3701 12150
      3701 12139 3710 12131


Mws


939 am PST Mon Feb 20 2017

... Flood Warning extended until further notice... the Flood Warning
continues for
the Coyote creek near Edenvale
* from this evening until further notice
* at 08am Monday the stage was 8.7 feet
* minor flooding is forecast
* flood stage is 10.0 feet
* forecast to rise above flood stage by this evening and continue to
rise to near 11.9 feet by early tomorrow morning. Additional rises
are forecast for Tuesday when levels should reach 12.7 feet in the early
afternoon.
* At 12.0 feet... moderate flooding possible along portions of Coyote
creek south of I-880.
* At 10.0 feet... minor localized flooding likely.


Lat... Lon 3745 12193 3739 12184 3723 12171 3722 12176
      3729 12186 3744 12196


Precautionary/preparedness actions...

All those affected by river conditions should remain alert for rapid
changes and for possible forecast revisions.





Areal Flood Advisory, Areal Flood Watch
Issued: 2:40 PM PST Feb. 20, 2017 – National Weather Service

The National Weather Service in the San Francisco Bay area has issued
a

* urban and small stream flood advisory for...
central San Mateo County in northern California...

* until 345 PM PST

* at 239 PM PST, Doppler radar indicated a heavy rain band
approaching the coast that will cause local urban and small stream
flooding in the advisory area.

* Some locations that will experience flooding include...
San Mateo, Redwood City, Palo Alto, Pacifica, Menlo Park,
Burlingame, San Carlos, Belmont, Half Moon Bay, Hillsborough,
Atherton, Woodside, El Granada, Highlands-Baywood Park, Portola
Valley, Pulgas RAWS, Highlands, Emerald Lake hills, La Honda RAWS
and Montara.

Lat... Lon 3758 12249 3757 12232 3740 12219 3738 12219
      3737 12220 3736 12220 3733 12218 3732 12219
      3731 12219 3724 12239


Blier


148 PM PST Mon Feb 20 2017

The National Weather Service in the San Francisco Bay area has issued
a

* urban and small stream flood advisory for...
southwestern Santa Clara County in northern California...
Santa Cruz County in northern California...
southeastern San Mateo County in northern California...

* until 445 PM PST

* at 145 PM PST, Doppler radar indicated moderate to heavy rain
continuing and causing urban and small stream flooding in the
advisory area. Additional moderate to heavy rainfall this
afternoon will likely lead to additional flooding.

* Some locations that will experience flooding include...
Palo Alto, Santa Cruz, Cupertino, Watsonville, Campbell, Saratoga,
Los Gatos, Corralitos, Scotts Valley, Capitola, Live Oak, Uvas
Canyon park, Aptos, Rio del Mar, Freedom, amesti, Ben Lomond,
Eureka Canyon Road, Soquel and Boulder Creek.

Precautionary/preparedness actions...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.


Lat... Lon 3733 12214 3725 12194 3716 12182 3706 12171
      3698 12168 3688 12181 3695 12187 3698 12194
      3695 12204 3697 12214 3708 12225 3714 12233
      3724 12239


Sims



132 PM PST Mon Feb 20 2017

The National Weather Service in the San Francisco Bay area has issued
a

* urban and small stream flood advisory for...
Napa County in northern California...
Sonoma County in northern California...
San Francisco County in northern California...
Marin County in northern California...
northwestern San Mateo County in northern California...

* until 430 PM PST

* at 130 PM PST, Doppler radar indicated heavy rain causing urban
and small stream flooding in the advisory area. Moderate to heavy
rain is expected through this afternoon leading to additional
flooding.

* Some locations that will experience flooding include...
San Francisco, Santa Rosa, Daly City, San Mateo, Napa, South San
Francisco, Petaluma, San Rafael, Novato, San Bruno, Rohnert Park,
Pacifica, Burlingame, Millbrae, Windsor, American Canyon, Mill
Valley, San Anselmo, Larkspur and Healdsburg.

Precautionary/preparedness actions...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.


Lat... Lon 3877 12354 3885 12282 3867 12261 3871 12246
      3881 12237 3886 12240 3883 12228 3833 12206
      3832 12221 3815 12220 3816 12240 3813 12235
      3811 12249 3794 12251 3757 12232 3758 12249
      3782 12252 3802 12286 3800 12302 3826 12297


Sims


512 am PST Mon Feb 20 2017

... Flood Watch remains in effect through late tonight...

The Flood Watch continues for

* a portion of western California... including the following
areas... coastal North Bay including Point Reyes National
Seashore... East Bay hills and the Diablo Range... East Bay
interior valleys... mountains of San Benito County and interior
Monterey County including Pinnacles National Park... North Bay
interior valleys... North Bay mountains... northern Monterey
Bay... northern Salinas valley/Hollister Valley and Carmel
Valley... San Francisco... San Francisco Bay shoreline... San
Francisco peninsula coast... Santa Clara Valley including San
Jose... Santa Cruz Mountains... Santa Lucia mountains and Los
Padres National Forest... southern Monterey Bay and Big Sur
coast and southern Salinas valley/Arroyo Seco and Lake San
Antonio.

* Through late tonight

* a prolonged period of moderate to heavy rainfall is anticipated
to fall on already saturated soils through Monday evening. This
will result in sharp rises on area creeks, streams and rivers and
will likely result in flooding.

* Impacts include enhanced runoff and associated flooding in low
lying areas and waterways, rising water levels and flooding on
area streams, creeks and rivers. Other impacts include increased
risk of rock/mud slides in steep terrain, downed trees and power
lines, and damaged to or washed out roadways.

Precautionary/preparedness actions...

A Flood Watch means there is a potential for flooding based on
current forecasts.

You should monitor later forecasts and be alert for possible
flood warnings. Those living in areas prone to flooding should be
prepared to take action should flooding develop.





Wind Advisory
Issued: 5:23 AM PST Feb. 20, 2017 – National Weather Service

... Wind Advisory remains in effect until 3 am PST Tuesday...

* timing... southeast winds increase through this morning.
Strongest southerly winds expected this afternoon and evening.
Winds diminish late tonight.

* Winds... sustained southerly winds 15 to 25 mph with gusts to 45
mph. Winds increasing to 20 to 30 mph this afternoon and evening
with gusts to 50 mph.

* Impacts... gusty winds will make driving difficult especially
for drivers of high profile vehicles. Saturated soils will
also contribute to an increased risk of downed trees and
powerlines.

Precautionary/preparedness actions...

A Wind Advisory means that wind gusts of at least 45 mph are
expected. Winds this strong can make driving difficult...
especially for high profile vehicles. Use extra caution. Winds
this strong combined with saturated soils can result in downed
trees and power outages.




Gale Warning
Issued: 2:24 PM PST Feb. 20, 2017 – National Weather Service

... Gale Warning now in effect until 2 am PST Tuesday...

* winds: southerly winds 25 to 35 kt... late afternoon and
evening storm force gusts to 50 kt.

Precautionary/preparedness actions...

A Gale Warning means winds of 34 to 47 knots are imminent or
occuring. Operating a vessel in gale conditions requires
experience and properly equipped vessels. It is highly
recommended that mariners without the proper experience seek safe
Harbor prior to the onset of gale conditions.