San Ramon, CA (94583)

10:50 PM PST on February 20, 2017 (GMT -0800)
Danville South | | Change Station

Elev 463 ft 37.79 °N, 121.98 °W | Updated 27 seconds ago

Overcast
Overcast
57.5 °F
Feels Like 57.5 °F
N
5.0
Wind Variable Wind from SSE
Gusts 9.0 mph

Today
High -- | Low -- °F
--% Chance of Precip.
Yesterday
High -- | Low -- °F
Precip. -- in
Pressure 30.02 in
Visibility 10.0 miles
Clouds Few 2300 ft
Mostly Cloudy 4700 ft
Overcast 5500 ft
Dew Point 52 °F
Humidity 83%
Rainfall 2.71 in
Snow Depth Not available.
6:50 AM 5:52 PM
Waning Crescent, 27% visible
SPECI KLVK 210604Z AUTO 20011KT 10SM FEW023 BKN047 OVC055 14/11 A3002 RMK AO2 T01390106 TSNO
Pressure 30.02 in
Visibility 10.0 miles
Clouds Few 2300 ft
Mostly Cloudy 4700 ft
Overcast 5500 ft
Dew Point 52 °F
Humidity 83%
Rainfall 2.71 in
Snow Depth Not available.
6:50 AM 5:52 PM
Waning Crescent, 27% visible
SPECI KLVK 210604Z AUTO 20011KT 10SM FEW023 BKN047 OVC055 14/11 A3002 RMK AO2 T01390106 TSNO

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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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City Distance Mag. Time & Date
Minimum magnitude displayed is 2.5.

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

Watches & Warnings

Areal Flood Warning, Flash Flood Warning
Issued: 10:42 PM PST Feb. 20, 2017 – National Weather Service

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

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

* until 1045 am PST Tuesday

* at 1015 PM PST Monday, the stream gage on Alameda creek in Niles
Canyon indicated a stream level of 14.6 feet. Flood stage at this
location is 9 feet. Moderate flooding continues along The Alameda
creek in Niles Canyon. In addition, a stream gage upstream on The
Alameda creek near Sunol indicated continued moderate flooding.
Rainfall has mostly ended across the area, but runoff from heavy
rain earlier on Monday will continue to maintain flooding along
The Alameda creek for much of Monday night and into Tuesday
morning.

* 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.

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

A Flood Warning means that flooding is imminent or occurring. All
interested parties should take necessary precautions immediately.


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




1001 PM PST Mon Feb 20 2017

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

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

* until 1245 am PST

* at 930 PM PST, stream gage reports indicate continued moderate
flooding on the Arroyo de la Laguna at Verona Road. At 9:30 PM PST
the water level there was at 17.7 feet. Moderate flooding begins
at 17 feet. The water level was beginning to recede, but runoff
from heavy rain earlier today continues which will mean water
levels will drop slowly overnight.

* Some locations that will experience flooding include...
areas near and along Pleasanton Sunol Road between Pleasanton and
Sunol.

Precautionary/preparedness actions...

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

Please report flooding to your local law enforcement agency when you
can do so safely.

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 3765 12188 3759 12187 3758 12188 3765 12191



Areal Flood Watch
Issued: 10:48 PM PST Feb. 20, 2017 – National Weather Service

... The flood advisory has been cancelled for south central Alameda
County...

The flood advisory for The Alameda creek in south central Alameda
County was upgraded to a Flood Warning. Therefore the flood advisory
is cancelled.

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




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.





High Wind Warning
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.






Gale Warning
Issued: 9:09 PM PST Feb. 20, 2017 – National Weather Service

... Gale Warning remains 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.