« View county listAvalanche Watch
URGENT - IMMEDIATE BROADCAST REQUESTED
U.S. FOREST SERVICE SIERRA AVALANCHE CENTER
RELAYED BY NATIONAL WEATHER SERVICE RENO NV
859 AM PST SUN FEB 19 2017
THE FOLLOWING MESSAGE IS TRANSMITTED AT THE REQUEST OF THE U.S.
FOREST SERVICE SIERRA AVALANCHE CENTER.
...AN AVALANCHE WATCH IS IN EFFECT FOR MONDAY MORNING THROUGH
A STRONG WINTER STORM BACKED BY AN ATMOSPHERIC RIVER WILL BEGIN TO
IMPACT THE REGION STARTING LATE TONIGHT AND CONTINUING THROUGH
MONDAY NIGHT. THIS STORM WILL BRING STRONG, GUSTY WINDS AND
SEVERAL FEET OF NEW SNOW TO THE SIERRA.
THE CURRENT AVALANCHE DANGER IS MODERATE. THE AVALANCHE DANGER IS
EXPECTED TO RISE TO HIGH BY 7 AM MONDAY MORNING.
THIS WATCH WAS POSTED AT 9 AM SUNDAY MORNING AND COVERS THE
SIERRA NEVADA MOUNTAINS BETWEEN YUBA PASS ON THE NORTH AND EBBETTS
PASS ON THE SOUTH, AND INCLUDES THE GREATER LAKE TAHOE BASIN.
THIS WATCH APPLIES ONLY TO BACKCOUNTRY AREAS OUTSIDE OF
ESTABLISHED SKI AREA BOUNDARIES. THE INFORMATION IN THIS STATEMENT
IS PROVIDED BY THE U.S. FOREST SERVICE, WHICH IS SOLELY
RESPONSIBLE FOR ITS CONTENT. THIS WATCH DESCRIBES GENERAL
AVALANCHE CONDITIONS AND LOCAL VARIATIONS ALWAYS OCCUR. THIS
AVALANCHE WATCH WILL BE UPDATED BY 7 AM MONDAY MORNING.
FOR ADDITIONAL INFORMATION GO TO WWW.SIERRAAVALANCHECENTER.ORG OR
CALL THE AVALANCHE HOTLINE AT 530 587 3558.
Colusa CA-Yolo CA-Sutter CA-Solano CA-Plumas CA-Alpine CA-Placer CA-
Shasta CA-Lassen CA-Amador CA-Tuolumne CA-Sacramento CA-Lake CA-
Stanislaus CA-San Joaquin CA-El Dorado CA-Calaveras CA-Tehama CA-
Butte CA-Glenn CA-Sierra CA-Yuba CA-Nevada CA-
959 AM PST SUN FEB 19 2017
...A FLOOD WARNING FOR URBAN AREAS AND SMALL STREAMS REMAINS IN
EFFECT UNTIL 400 PM PST THURSDAY FOR COLUSA...YOLO...SUTTER...
* Interior Northern California will experience another significant
uptick in flooding problems starting late tonight and continuing
through Monday night as an intense Atmospheric River type storm
* Our entire region has saturated soils and many flooded areas
already. This will enhance the impact of additional heavy rains
* Additional stress will be placed on levees, rivers, creeks, and
* We may see flooding in locations which haven't been impacted in
* We are strongly advising all residents in interior Northern
California to be prepared for flooding.
Be prepared to evacuate if flooding should affect your area. Gather
a "go bag" with important items like medications and hard to replace
documents. Do not forget to plan for you pets and animals.
Please never drive across flooded waters and roadways, especially
flowing water. Most people who are killed or injured during floods
are attempting to drive through flooded waters. Turn around, don't
LAT...LON 3725 12146 3810 12157 3808 12230 3832 12206
3884 12229 3867 12262 3907 12309 3950 12306
3955 12288 4033 12307 4058 12269 4117 12246
4118 12250 4118 12133 4059 12132 3835 11963
3776 11988 3780 12018 3713 12122
Greater Lake Tahoe Area-
Including the cities of South Lake Tahoe, Tahoe City, Truckee,
Markleeville, Stateline, Glenbrook, and Incline Village
330 PM PST Sun Feb 19 2017
...FLOOD WATCH REMAINS IN EFFECT FROM 1 AM PST MONDAY THROUGH
The Flood Watch continues for
* Portions of east central California and western Nevada,
including the following areas, in east central California,
Greater Lake Tahoe Area. In western Nevada, Greater Lake Tahoe
* From 1 AM PST Monday through Tuesday morning
* A strong atmospheric river will bring heavy rain with high snow
levels. Moderate to heavy rain and snow melt below 7000 feet
will contribute to increasing flows on rivers and streams with
an enhanced flood potential late tonight through Tuesday
* The highest risk of flooding is along creeks, streams, and poor
drainage areas, including the Upper Truckee River in South Lake
Tahoe. The Truckee and Carson River are forecast to rise to near
monitor stage Monday night into Tuesday, but at this time are
expected to remain below flood stage.
Small creeks and streams are the most susceptible to flooding.
Excessive rainfall may also generate rock and mud slides in steep
terrain. Persons in the Lake Tahoe area should take action to
clear blocked drains and areas where snow berms would allow water
to collect and damage property. Persons living along small creeks
and streams should monitor the latest weather information at
weather.gov/reno and be prepared to take action should flooding
$$Winter Storm Warning
Greater Lake Tahoe Area-
258 PM PST Sun Feb 19 2017
...WINTER STORM WARNING NOW IN EFFECT FROM 10 PM THIS EVENING TO
4 PM PST TUESDAY ABOVE 6500 FEET...
The Winter Storm Warning above 6500 feet is now in effect from
10 PM this evening to 4 PM PST Tuesday.
* Timing: Periods of light snow today will increase this
evening, with heavy snow pushing into the region late tonight
and continuing through early Tuesday morning.
* Snow Accumulations: Above 7500 feet...2 to 5 feet. Between
6500 and 7500 feet...8 to 24 inches. Heaviest snow will be
west of Highway 89 and along the Sierra crest. Below 6500
feet...Up to 6 inches.
* Winds: South to Southwest winds 25 to 35 mph with gusts to 55
mph. Sierra ridge gusts over 130 mph.
* Snow Levels: Near 6000 feet through this evening, rising
overnight to near 7500 feet Monday morning, then falling
again Monday night to near 6500 feet.
* Impacts: Heavy snow will create dangerous conditions, with
travel being severely impacted over the Sierra passes.
Whiteout conditions are likely over the passes and in the
Avoid travel if possible tonight through Monday night, you could
be stuck in your vehicle for many hours. If you must travel,
prepare for long delays and carry an emergency kit with extra
food, water and clothing. If you stay home, have a backup plan in
case of power outages.
$$Winter Storm Warning
Western Plumas County/Lassen Park-
West Slope Northern Sierra Nevada-
Including the cities of Chester, Quincy, and Blue Canyon
330 AM PST Mon Feb 20 2017
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 PM PST
* MAIN IMPACTS: TRAVELERS MAY EXPERIENCE LONG DELAYS. CHAIN
CONTROLS LIKELY. POOR VISIBILITY DUE TO SNOW AND STRONG WINDS
WILL MAKE TRAVEL HAZARDOUS. CONCERN FOR MUDSLIDES ACROSS
* LOCATIONS...INTERSTATE 80 OVER DONNER PASS, HIGHWAY 50 OVER
ECHO SUMMIT, HIGHWAY 88 OVER CARSON PASS, AND LASSEN PARK.
* TIMING...PERIODS OF HEAVY SNOW THROUGH TUESDAY EVENING BEFORE
DROPPING OFF TO LIGHTER SNOW TUESDAY NIGHT.
* SNOW AMOUNTS...UP TO A FOOT OF SNOW EXPECTED DOWN TO ABOUT
5500 FEET WITH 2 TO 5 FEET OF SNOW POSSIBLE ABOVE 6000 FEET
BETWEEN TODAY AND TUESDAY EVENING.
* SNOW LEVELS...SNOW LEVELS AROUND 7000 FEET DROPPING ON TUESDAY
TO BETWEEN 4000 AND 5000 FEET.
A Winter Storm Warning for heavy snow means severe winter weather
conditions are expected or occurring. Significant amounts of
snow are forecast that will make travel dangerous. Only travel in
an emergency. If you must travel, keep an extra flashlight, food,
and water in your vehicle in case of an emergency. Strong winds
are also possible. This will make travel very hazardous or
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