San Ramon, CA

11:01 AM PST on February 20, 2017 (GMT -0800)
Bollinger Hills | | Change Station

Elev 535 ft 37.75 °N, 121.96 °W | Updated 7 seconds ago

Rain
Rain
57.4 °F
Feels Like 57.4 °F
N
2.2
Wind Variable Wind from SW
Gusts 5.4 mph

Today
High -- | Low -- °F
--% Chance of Precip.
Yesterday
High -- | Low -- °F
Precip. -- in
Pressure 29.99 in
Visibility 7.0 miles
Clouds Few 2000 ft
Overcast 7000 ft
Dew Point 53 °F
Humidity 86%
Rainfall 0.91 in
Snow Depth Not available.
6:50 AM 5:52 PM
Waning Crescent, 32% visible
METAR KLVK 201853Z 00000KT 7SM -RA FEW020 OVC070 13/11 A2999 RMK AO2 SLP155 P0005 T01330111
Pressure 29.99 in
Visibility 7.0 miles
Clouds Few 2000 ft
Overcast 7000 ft
Dew Point 53 °F
Humidity 86%
Rainfall 0.91 in
Snow Depth Not available.
6:50 AM 5:52 PM
Waning Crescent, 32% visible
METAR KLVK 201853Z 00000KT 7SM -RA FEW020 OVC070 13/11 A2999 RMK AO2 SLP155 P0005 T01330111

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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


Areal Flood Watch
Issued: 5:12 AM PST Feb. 20, 2017 – National Weather Service

... 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.





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

... Wind Advisory remains in effect until 1 PM PST this
afternoon...
... High Wind Warning remains in effect from 1 PM this afternoon
to 3 am PST Tuesday...

* timing... southeast winds increase through this morning and then
further intensify this afternoon. 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 25 to 40 mph this afternoon and evening
with gusts to 60 mph.

* Impacts... winds may be strong enough to cause property damage.
Strong and 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.

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.






Special Statement
Issued: 3:19 AM PST Feb. 20, 2017 – National Weather Service

... Potent storm system and atmospheric river likely to result in
widespread flooding, strong winds and increased threat for
rock/mud slides, shallow landslides and potential debris flows in
hilly terrain and recent burn scar areas through today...

Rainfall and winds continue to increase in coverage and intensity
early this Monday morning and will continue to do so through this
afternoon. Rainfall will be heavy at times, especially in the
North Bay region and along the southwest facing coastal slopes
resulting in the potential for life-threatening flooding. If you
have experienced flooding at any time this winter season, either
near your home or on your daily commute, the potential exists for
additional flooding in these areas during the next 12 to 18
hours.

In addition, southerly winds will increase this afternoon and
result in a heightened threat for downed trees and power lines
with the potential for isolated to scattered power outages. The
combination of heavy rainfall and strong winds will also give way
to widespread rock/mud slides, shallow landslides and potential
debris flows in hilly terrain and recent burn scar areas.

Residents are urged to remain vigilant and encouraged to stay up-
to-date with the lastest weather information throughout the day.
Those taking to area roadways should also check the latest
information from the California Highway patrol and California
Department of Transportation for potential Road closures.
Remember, "turn around, don't drown" when encountering flooded
roadways. It is never safe to drive or walk into flood waters.


Rgass


319 am PST Mon Feb 20 2017

... Potent storm system and atmospheric river likely to result in
widespread flooding, strong winds and increased threat for
rock/mud slides, shallow landslides and potential debris flows in
hilly terrain and recent burn scar areas through today...

Rainfall and winds continue to increase in coverage and intensity
early this Monday morning and will continue to do so through this
afternoon. Rainfall will be heavy at times, especially in the
North Bay region and along the southwest facing coastal slopes
resulting in the potential for life-threatening flooding. If you
have experienced flooding at any time this winter season, either
near your home or on your daily commute, the potential exists for
additional flooding in these areas during the next 12 to 18
hours.

In addition, southerly winds will increase this afternoon and
result in a heightened threat for downed trees and power lines
with the potential for isolated to scattered power outages. The
combination of heavy rainfall and strong winds will also give way
to widespread rock/mud slides, shallow landslides and potential
debris flows in hilly terrain and recent burn scar areas.

Residents are urged to remain vigilant and encouraged to stay up-
to-date with the lastest weather information throughout the day.
Those taking to area roadways should also check the latest
information from the California Highway patrol and California
Department of Transportation for potential Road closures.
Remember, "turn around, don't drown" when encountering flooded
roadways. It is never safe to drive or walk into flood waters.


Rgass