Avalanche & Snowfall Warnings in Washington & Oregon Today | 5-12″ of Snow Forecast

WeatherBrains | | WeatherWeather
image: noaa, today
image: noaa, today

NOAA has issued a Winter Weather Advisory for Washington state today and tomorrow and a Winter Storm Watch for the Mt. Hood, OR region.

5-12″ of snow are forecast in WA and 2-6″ in OR.

* SNOW ACCUMULATIONS...5 TO 10 INCHES IN THE PASSES AND OVER 1
  FOOT ABOVE 5000 FEET THROUGH MONDAY MORNING.
  - NOAA Seattle, WA today

* SNOW ACCUMULATION...2 TO 4 INCHES LIKELY FOR THE CENTRAL
  COLUMBIA GORGE...BUT 4 TO 6 INCHES EXPECTED IN THE UPPER HOOD
  RIVER VALLEY. 
  - NOAA Portland, OR today
Up to 19" of snow forecast on Mt. St. Helens, WA. image: noaa, today
Up to 19″ of snow forecast on Mt. St. Helens, WA. image: noaa, today

An Avalanche Warning as also been issued that is calling for HIGH avalanche danger in Washington on Monday.

Avalanche danger is also currently rated as HIGH in the Mt. Hood, OR region.

AVALANCHE DANGER...
THE AVALANCHE DANGER IS EXPECTED TO BECOME HIGH IN THESE AREAS
MONDAY. - NOAA, Seattle, WA today
Crystal Mountain, WA forecast looking good this week. image: noaa, today
Crystal Mountain, WA forecast looking good this week. image: noaa, today

Crystal Mountain has a 32-45″ snowpack.

Mt. Baker has a 79-120″ snowpack.

“It will be windy tonight through Monday morning for much of western Washington, with the strongest winds in the North Interior, North Coast, Hood Canal, and around Everett. Downed tree limbs and local power outages are possible. The Cascades will see 7 to 13 inches of snow by Monday morning. This will make travel difficult, including in the passes. Also, the avalanche danger will be high for Cascades for Monday.” – NOAA, Seattle, WA today

screen-shot-2016-12-18-at-10-42-26-pm

image: nwac, today
image: nwac, today

AVALANCHE WARNING for WASHINGTON & OREGON:

BULLETIN-IMMEDIATE BROADCAST REQUESTED
BACKCOUNTRY AVALANCHE WARNING
NORTHWEST AVALANCHE CENTER SEATTLE WASHINGTON
RELAYED BY NATIONAL WEATHER SERVICE SEATTLE WASHINGTON
400 PM PST SUN DEC 18 2016

THE NORTHWEST AVALANCHE CENTER HAS ISSUED AN AVALANCHE WARNING...

TIMING...
DAYLIGHT HOURS MONDAY DECEMBER 19 2016.

LOCATION...
THE WEST SLOPES OF THE WASHINGTON CASCADES AND MT HOOD.

AVALANCHE DANGER...
THE AVALANCHE DANGER IS EXPECTED TO BECOME HIGH IN THESE AREAS
MONDAY.

REASON...
INCREASING HEAVY SNOW WILL LOAD POTENTIAL WEAK LAYERS
FORMED DURING THE RECENT COLD WEATHER AND BUILD NEW POTENTIAL
UNSTABLE LAYERS ON MONDAY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...
PLEASE VISIT NWAC.US FOR FURTHER INFORMATION.

ADDITIONAL INFORMATION...
THIS WARNING DOES NOT APPLY TO SKI AREAS WHERE AVALANCHE MITIGATION
MEASURES ARE PERFORMED.

TRANSMITTED AT THE REQUEST OF NORTHWEST AVALANCHE CENTER IN SEATTLE,
WASHINGTON.

WINTER STORM WARNING for OREGON:

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE PORTLAND OR
227 PM PST SUN DEC 18 2016

UPPER HOOD RIVER VALLEY-CENTRAL COLUMBIA RIVER GORGE-
INCLUDING THE CITIES OF...ODELL...HOOD RIVER...CARSON...UNDERWOOD

...WINTER STORM WARNING FOR SNOW AND FREEZING RAIN IN EFFECT FROM
4 AM TO 1 PM MONDAY FOR THE UPPER HOOD RIVER VALLEY AND THE
CENTRAL COLUMBIA RIVER GORGE...

THE NATIONAL WEATHER SERVICE IN PORTLAND HAS ISSUED A WINTER
STORM WARNING...WHICH IS IN EFFECT FROM 4 AM TO 1 PM PST MONDAY.

* TIMING...SNOW DEVELOPING LATE TONIGHT...AND CONTINUING THROUGH
  MONDAY MORNING. THERE WILL BE A PERIOD WHEN SNOW WILL MIX WITH
  OR TURN TO SLEET AND FREEZING RAIN...LIKELY AFTER 11 AM...AND
  LASTING INTO THE EARLY AFTERNOON. PRECIPITATION SHOULD TURN TO
  JUST RAIN IN THE AFTERNOON.

* ACCUMULATION/SNOW LEVELS...SNOW LEVEL WILL BE AT THE SURFACE...
  BUT RISING TO 2000 FEET OR HIGHER IN THE EARLY AFTERNOON.

* SNOW ACCUMULATION...2 TO 4 INCHES LIKELY FOR THE CENTRAL
  COLUMBIA GORGE...BUT 4 TO 6 INCHES EXPECTED IN THE UPPER HOOD
  RIVER VALLEY.

* ICE ACCUMULATION...GENERALLY 0.10 TO 0.20 INCH OF ICE
  ACCUMULATION FROM FREEZING RAIN AND SLEET.

* IMPACTS...TRAVEL WILL BE QUITE TREACHEROUS FROM THE MORNING INTO
  THE EARLY AFTERNOON. EVEN THOUGH PRECIPITATION WILL TURN TO
  MOSTLY RAIN IN THE AFTERNOON...TRAVEL WILL REMAIN SOMEWHAT
  DANGEROUS DUE TO SLICK CONDITIONS.

* EXPECT SOME PONDING OF WATER DUE SNOW-CLOGGED DRAINS AND ON
  ROADS WHERE PLOWED SNOW MAY BLOCK NORMAL DRAINAGES...ESPECIALLY
  FROM THE AFTERNOON INTO THE EVENING.

WINTER WEATHER ADVISORY for WASHINGTON:

URGENT - WINTER WEATHER MESSAGE...CORRECTED
NATIONAL WEATHER SERVICE SEATTLE WA
1022 PM PST SUN DEC 18 2016

CASCADES OF WHATCOM AND SKAGIT COUNTIES-
CASCADES OF SNOHOMISH AND KING COUNTIES-
CASCADES OF PIERCE AND LEWIS COUNTIES-

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON PST MONDAY...

* SNOW ACCUMULATIONS...5 TO 10 INCHES IN THE PASSES AND OVER 1
  FOOT ABOVE 5000 FEET THROUGH MONDAY MORNING.

* SOME AFFECTED LOCATIONS...STEVENS PASS AND SNOQUALMIE PASS.

* TIMING...SNOW WILL INCREASE AROUND MIDNIGHT TONIGHT AND BECOME
  HEAVY AT TIMES LATER TONIGHT AND MONDAY MORNING. A TAPER TO
  SNOW SHOWERS WILL OCCUR BY MIDDAY MONDAY.

* MAIN IMPACT...SUB FREEZING TEMPERATURES IN THE PASSES WILL
  CREATE VERY SLICK AND DIFFICULT TRAVEL CONDITIONS.

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