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From the Portland National Weather Service office in Portland



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WWUS46 KPQR 161304
WSWPQR

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE PORTLAND OR
504 AM PST MON JAN 16 2017

...MAJOR ICE STORM APPEARING LIKELY TUESDAY AND WEDNESDAY FOR THE
HOOD RIVER AND WIND RIVER VALLEYS...THE COLUMBIA RIVER GORGE...AS
WELL AS MANY VALLEYS WITHIN THE GIFFORD PINCHOT NATIONAL FOREST...

...SIGNIFICANT ICING ALSO POSSIBLE TUESDAY FOR THE GREATER
PORTLAND AND VANCOUVER METRO AREA...NEARBY VALLEYS IN THE COAST
RANGE AND CASCADES...AND THE CENTRAL WILLAMETTE VALLEY...

.YET ANOTHER ICE STORM IS APPEARING MORE LIKELY FOR THE INLAND
VALLEYS OF SOUTHWEST WASHINGTON AND EXTREME NORTHWEST OREGON
TUESDAY...LIKELY LASTING INTO WEDNESDAY IN AND NEAR THE COLUMBIA
RIVER GORGE. TEMPERATURES WILL BE SLOW TO RECOVER FROM SEVERAL
DAYS OF SUBFREEZING WEATHER...ESPECIALLY WHERE THERE IS SNOW LEFT
ON THE GROUND FROM LAST WEEKS PORTLAND AREA SNOWSTORM.

TEMPERATURES ARE EXPECTED TO REMAIN NEAR OR BELOW FREEZING UNDER
VALLEY INVERSIONS TODAY...THEN REMAIN STEADY NEAR OR BELOW
FREEZING TONIGHT AND TUESDAY MORNING. MEANWHILE...A VERY MOIST
PACIFIC FRONTAL SYSTEM WILL SPREAD RAIN ACROSS THE REGION TUESDAY
MORNING...INCREASING TUESDAY AFTERNOON AND EVENING. THERE WILL
LIKELY BE SEVERAL HOURS OF RAIN BEFORE WARM AIR ALOFT CAN WORK ITS
WAY DOWN TO THE VALLEY FLOORS...LEADING TO THE POTENTIAL OF
SEVERAL HOURS OF FREEZING RAIN. AREAS IN AND NEAR THE COLUMBIA
GORGE WILL BE HARDEST HIT...AS THEY WILL BE THE LAST TO CLIMB
ABOVE FREEZING. IT IS VERY POSSIBLE THAT LOCALLY OVER AN INCH OF
ICE WILL ACCUMULATE IN THE COLUMBIA GORGE...HOOD RIVER...AND WIND
RIVER VALLEYS BY THE TIME TEMPERATURES CRAWL ABOVE FREEZING
WEDNESDAY.


ORZ006-WAZ039-170000-
/O.NEW.KPQR.WS.A.0002.170117T1200Z-170118T0200Z/
GREATER PORTLAND METRO AREA-GREATER VANCOUVER AREA-
INCLUDING THE CITIES OF...HILLSBORO...PORTLAND...OREGON CITY...
GRESHAM...VANCOUVER...BATTLE GROUND...WASHOUGAL
504 AM PST MON JAN 16 2017

...WINTER STORM WATCH IN EFFECT FROM EARLY TUESDAY MORNING THROUGH
TUESDAY AFTERNOON FOR THE GREATER PORTLAND AND VANCOUVER METRO
AREA...

THE NATIONAL WEATHER SERVICE IN PORTLAND HAS ISSUED A WINTER
STORM WATCH FOR SIGNIFICANT ICING...WHICH IS IN EFFECT FROM EARLY
TUESDAY MORNING THROUGH TUESDAY AFTERNOON.

* TIMING...FREEZING RAIN IS EXPECTED TO DEVELOP EARLY TUESDAY
  MORNING...INCREASING THROUGHOUT THE DAY. TEMPERATURES ARE
  EXPECTED TO SLOWLY CLIMB ABOVE FREEZING TUESDAY...WITH AREAS
  EAST OF INTERSTATE 205 LIKELY BEING THE LAST TO CHANGE TO PLAIN
  RAIN LATE IN THE AFTERNOON OR DURING THE EVENING.

* ICE ACCUMULATION...0.20 TO 0.40 INCH...EXCEPT 0.50 TO 0.75 INCH
  TROUTDALE AND GRESHAM EASTWARD.

* IMPACTS...MANY ROADS REMAIN SNOW AND ICE COVERED FROM LAST WEEKS
  SNOWSTORM. ADDITIONALLY...SEVERAL DAYS OF VERY COLD TEMPERATURES
  WILL MAKE GROUND SURFACES LIKE ROADS AND SIDEWALKS VERY
  RECEPTIVE TO ICE ACCUMULATION. IT MAY TAKE A COUPLE HOURS OF
  TEMPERATURES ABOVE FREEZING TO COMPLETELY END THE FREEZING RAIN
  THREAT AT ANY GIVEN LOCATION. ROADS MAY AGAIN BECOME DIFFICULT
  FOR TRAVEL ACROSS THE GREATER PORTLAND AND VANCOUVER METRO AREA
  TUESDAY. ICE ACCUMULATION ON TREES AND POWER LINES MAY RESULT IN
  DOWNED BRANCHES AND LINES...WHICH WOULD BRING THE THREAT OF
  POWER OUTAGES TUESDAY INTO TUESDAY NIGHT. 



PRECAUTIONARY/PREPAREDNESS ACTIONS...

THERE IS A POTENTIAL FOR SIGNIFICANT ICE ACCUMULATIONS. FUTURE
DRIVING...BICYCLING...AND WALKING CONDITIONS MAY BECOME
HAZARDOUS...SO IT IS IMPORTANT TO MONITOR THE LATEST FORECASTS.
ALSO...BE PREPARED FOR POTENTIAL POWER OUTAGES AS ICE MAY BRING
BRANCHES AND POWER LINES DOWN TUESDAY.

&&

$$

ORZ007-170000-
/O.NEW.KPQR.WS.A.0002.170117T1200Z-170117T2200Z/
CENTRAL WILLAMETTE VALLEY-
INCLUDING THE CITIES OF...SALEM...MCMINNVILLE
504 AM PST MON JAN 16 2017

...WINTER STORM WATCH IN EFFECT FROM EARLY TUESDAY MORNING THROUGH
TUESDAY AFTERNOON FOR THE CENTRAL WILLAMETTE VALLEY...

THE NATIONAL WEATHER SERVICE IN PORTLAND HAS ISSUED A WINTER
STORM WATCH FOR SIGNIFICANT ICING...WHICH IS IN EFFECT FROM EARLY
TUESDAY MORNING THROUGH TUESDAY AFTERNOON.

* TIMING...FREEZING RAIN IS EXPECTED TO DEVELOP EARLY TUESDAY
  MORNING...INCREASING THROUGHOUT THE DAY. TEMPERATURES ARE
  EXPECTED TO SLOWLY CLIMB ABOVE FREEZING AROUND MIDDAY
  TUESDAY...ENDING THE FREEZING RAIN THREAT TUESDAY AFTERNOON.

* ICE ACCUMULATION...AROUND ONE QUARTER INCH...MAINLY NEAR NEWBERG
  AND MCMINNVILLE. OTHER AREAS SUCH AS SALEM AND AUMSVILLE ARE
  EXPECTED TO SEE LESS ICING...GENERALLY AROUND ONE TENTH OF AN
  INCH OR LESS.

* IMPACTS...SEVERAL DAYS OF VERY COLD TEMPERATURES WILL MAKE
  GROUND SURFACES LIKE ROADS AND SIDEWALKS VERY RECEPTIVE TO ICE
  ACCUMULATION. IT MAY TAKE A COUPLE HOURS OF TEMPERATURES ABOVE
  FREEZING TO COMPLETELY END THE FREEZING RAIN THREAT AT ANY GIVEN
  LOCATION. ICE ACCUMULATION ON TREES AND POWER LINES MAY RESULT
  IN DOWNED BRANCHES AND LINES...WHICH WOULD BRING THE THREAT OF
  POWER OUTAGES TUESDAY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THERE IS A POTENTIAL FOR SIGNIFICANT ICE ACCUMULATIONS. FUTURE
DRIVING...BICYCLING...AND WALKING CONDITIONS MAY BECOME
HAZARDOUS...SO IT IS IMPORTANT TO MONITOR THE LATEST FORECASTS.
ALSO...BE PREPARED FOR POTENTIAL POWER OUTAGES AS ICE MAY BRING
BRANCHES AND POWER LINES DOWN TUESDAY.

&&

$$

ORZ003-005-170000-
/O.NEW.KPQR.WS.A.0002.170117T1000Z-170117T2200Z/
COAST RANGE OF NORTHWEST OREGON-LOWER COLUMBIA-
INCLUDING THE CITIES OF...VERNONIA...ST. HELENS
504 AM PST MON JAN 16 2017

...WINTER STORM WATCH IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY
AFTERNOON FOR THE LOWER COLUMBIA AND VALLEYS BELOW 1000 FEET IN
THE NORTH OREGON COAST RANGE...

THE NATIONAL WEATHER SERVICE IN PORTLAND HAS ISSUED A WINTER
STORM WATCH FOR SIGNIFICANT ICING IN THE VALLEYS BELOW 1000
FEET ELEVATION...WHICH IS IN EFFECT FROM LATE TONIGHT THROUGH
TUESDAY AFTERNOON.

* TIMING...RAIN IS EXPECTED TO DEVELOP LATE TONIGHT OR EARLY
  TUESDAY MORNING...INCREASING THROUGHOUT THE DAY. SUBFREEZING AIR
  TRAPPED IN THE COAST RANGE VALLEYS WILL LIKELY CAUSE FREEZING
  RAIN AND SIGNIFICANT ICE ACCUMULATION TUESDAY MORNING. VALLEY
  TEMPERATURES ARE EXPECTED TO CLIMB ABOVE FREEZING AROUND MIDDAY
  TUESDAY...ENDING THE FREEZING RAIN THREAT TUESDAY AFTERNOON.

* ICE ACCUMULATION...VALLEY ICE ACCUMULATION OF UP TO ONE HALF
  INCH IS POSSIBLE. RIDGETOP TEMPERATURES WILL BE SIGNIFICANTLY
  WARMER...SO NO SIGNIFICANT ICING IS EXPECTED IN THE HIGHER
  TERRAIN.

* IMPACTS...SEVERAL DAYS OF VERY COLD TEMPERATURES WILL MAKE
  GROUND SURFACES LIKE ROADS AND SIDEWALKS VERY RECEPTIVE TO ICE
  ACCUMULATION. IT MAY TAKE A COUPLE HOURS OF TEMPERATURES ABOVE
  FREEZING TO COMPLETELY END THE FREEZING RAIN THREAT AT ANY GIVEN
  LOCATION. ICE ACCUMULATION ON TREES AND POWER LINES MAY RESULT
  IN DOWNED BRANCHES AND LINES...WHICH WOULD BRING THE THREAT OF
  POWER OUTAGES TUESDAY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THERE IS A POTENTIAL FOR SIGNIFICANT ICE ACCUMULATIONS. FUTURE
DRIVING...BICYCLING...AND WALKING CONDITIONS MAY BECOME
HAZARDOUS...SO IT IS IMPORTANT TO MONITOR THE LATEST FORECASTS.
ALSO...BE PREPARED FOR POTENTIAL POWER OUTAGES AS ICE MAY BRING
BRANCHES AND POWER LINES DOWN TUESDAY.

&&

$$

WAZ040-170000-
/O.NEW.KPQR.WS.A.0002.170117T1200Z-170117T2200Z/
SOUTH WASHINGTON CASCADE FOOTHILLS-
INCLUDING THE CITIES OF...TOUTLE...LAKE MERWIN...COUGAR
504 AM PST MON JAN 16 2017

...WINTER STORM WATCH IN EFFECT FROM EARLY TUESDAY MORNING THROUGH
TUESDAY AFTERNOON FOR THE VALLEYS BELOW 1500 FEET IN THE SOUTH
WASHINGTON CASCADE FOOTHILLS...

THE NATIONAL WEATHER SERVICE IN PORTLAND HAS ISSUED A WINTER
STORM WATCH FOR SIGNIFICANT ICING IN THE VALLEYS BELOW 1500 FEET
ELEVATION...WHICH IS IN EFFECT FROM EARLY TUESDAY MORNING THROUGH
TUESDAY AFTERNOON.

* TIMING...RAIN IS EXPECTED TO DEVELOP EARLY TUESDAY MORNING...
  INCREASING THROUGHOUT THE DAY. SUBFREEZING AIR TRAPPED IN THE
  CASCADE VALLEYS WILL LIKELY CAUSE FREEZING RAIN AND SIGNIFICANT
  ICE ACCUMULATION TUESDAY MORNING. VALLEY TEMPERATURES ARE
  EXPECTED TO CLIMB ABOVE FREEZING AROUND MIDDAY TUESDAY...ENDING
  THE FREEZING RAIN THREAT TUESDAY AFTERNOON.

* ICE ACCUMULATION...VALLEY ICE ACCUMULATION OF UP TO ONE HALF
  INCH IS POSSIBLE. RIDGETOP TEMPERATURES WILL BE SIGNIFICANTLY
  WARMER...SO NO SIGNIFICANT ICING IS EXPECTED IN THE HIGHER
  TERRAIN. 

* IMPACTS...SEVERAL DAYS OF VERY COLD TEMPERATURES WILL MAKE
  GROUND SURFACES LIKE ROADS AND SIDEWALKS VERY RECEPTIVE TO ICE
  ACCUMULATION. IT MAY TAKE A COUPLE HOURS OF TEMPERATURES ABOVE
  FREEZING TO COMPLETELY END THE FREEZING RAIN THREAT AT ANY GIVEN
  LOCATION. ICE ACCUMULATION ON TREES AND POWER LINES MAY RESULT
  IN DOWNED BRANCHES AND LINES...WHICH WOULD BRING THE THREAT OF
  POWER OUTAGES TUESDAY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THERE IS A POTENTIAL FOR SIGNIFICANT ICE ACCUMULATIONS. FUTURE
DRIVING...BICYCLING...AND WALKING CONDITIONS MAY BECOME
HAZARDOUS...SO IT IS IMPORTANT TO MONITOR THE LATEST FORECASTS.
ALSO...BE PREPARED FOR POTENTIAL POWER OUTAGES AS ICE MAY BRING
BRANCHES AND POWER LINES DOWN TUESDAY.

&&

$$

ORZ010-011-170000-
/O.NEW.KPQR.WS.A.0002.170117T1400Z-170118T0200Z/
NORTHERN OREGON CASCADE FOOTHILLS-NORTHERN OREGON CASCADES-
INCLUDING THE CITIES OF...SANDY...ESTACADA...SWEET HOME
504 AM PST MON JAN 16 2017

...WINTER STORM WATCH IN EFFECT FROM TUESDAY MORNING THROUGH
TUESDAY AFTERNOON FOR THE VALLEYS BELOW 2000 FEET IN THE NORTH
OREGON CASCADES AND FOOTHILLS...

THE NATIONAL WEATHER SERVICE IN PORTLAND HAS ISSUED A WINTER
STORM WATCH FOR SIGNIFICANT ICING IN THE VALLEYS BELOW 2000
FEET...WHICH IS IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY
AFTERNOON.

* TIMING...RAIN IS EXPECTED TO DEVELOP TUESDAY MORNING...
  INCREASING THROUGHOUT THE DAY. SUBFREEZING AIR TRAPPED IN THE
  CASCADE VALLEYS WILL LIKELY CAUSE FREEZING RAIN AND SIGNIFICANT
  ICE ACCUMULATION TUESDAY MORNING. VALLEY TEMPERATURES ARE
  EXPECTED TO SLOWLY CLIMB ABOVE FREEZING TUESDAY AFTERNOON...
  ENDING THE FREEZING RAIN THREAT TUESDAY EVENING.

* ICE ACCUMULATION...VALLEY ICE ACCUMULATION OF UP TO ONE THIRD
  OF AN INCH. RIDGETOP TEMPERATURES WILL BE SIGNIFICANTLY
  WARMER...SO NO SIGNIFICANT ICING IS EXPECTED IN THE HIGHER
  TERRAIN. 

* IMPACTS...SEVERAL DAYS OF VERY COLD TEMPERATURES WILL MAKE
  GROUND SURFACES LIKE ROADS AND SIDEWALKS VERY RECEPTIVE TO ICE
  ACCUMULATION. IT MAY TAKE A COUPLE HOURS OF TEMPERATURES ABOVE
  FREEZING TO COMPLETELY END THE FREEZING RAIN THREAT AT ANY GIVEN
  LOCATION. ICE ACCUMULATION ON TREES AND POWER LINES MAY RESULT
  IN DOWNED BRANCHES AND LINES...WHICH WOULD BRING THE THREAT OF
  POWER OUTAGES TUESDAY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THERE IS A POTENTIAL FOR SIGNIFICANT ICE ACCUMULATIONS. FUTURE
DRIVING...BICYCLING...AND WALKING CONDITIONS MAY BECOME
HAZARDOUS...SO IT IS IMPORTANT TO MONITOR THE LATEST FORECASTS.
ALSO...BE PREPARED FOR POTENTIAL POWER OUTAGES AS ICE MAY BRING
BRANCHES AND POWER LINES DOWN TUESDAY.

&&

$$

ORZ014>016-WAZ019-045-046-170000-
/O.NEW.KPQR.WS.A.0002.170117T1400Z-170119T0200Z/
UPPER HOOD RIVER VALLEY-WESTERN COLUMBIA RIVER GORGE-
CENTRAL COLUMBIA RIVER GORGE-SOUTH WASHINGTON CASCADES-
INCLUDING THE CITIES OF...ODELL...CORBETT...HOOD RIVER...CARSON...
UNDERWOOD
504 AM PST MON JAN 16 2017

...WINTER STORM WATCH IN EFFECT FROM TUESDAY MORNING THROUGH
WEDNESDAY AFTERNOON FOR THE WESTERN AND CENTRAL COLUMBIA RIVER
GORGE...THE HOOD RIVER VALLEY...AND SOUTH WASHINGTON CASCADE
VALLEYS BELOW 2500 FEET...

THE NATIONAL WEATHER SERVICE IN PORTLAND HAS ISSUED A WINTER
STORM WATCH FOR SIGNIFICANT ICING IN THE VALLEYS BELOW 2500
FEET...WHICH IS IN EFFECT FROM TUESDAY MORNING THROUGH WEDNESDAY
AFTERNOON.

* TIMING...FREEZING RAIN IS EXPECTED TO DEVELOP EARLY TUESDAY
  MORNING...INCREASING THROUGHOUT THE DAY. FREEZING RAIN WILL
  BECOME HEAVY AT TIMES TUESDAY NIGHT AND WEDNESDAY. TEMPERATURES
  WILL BE VERY SLOW TO CLIMB UNDER VALLEY INVERSIONS...AND MANY
  LOCATIONS MAY NOT CLIMB ABOVE FREEZING UNTIL WEDNESDAY AFTERNOON
  OR EVENING. PRECIPITATION WILL TAPER TO SHOWERS WEDNESDAY NIGHT.

* ICE ACCUMULATION...MAJOR ICE STORM IS POSSIBLE...WITH ICE
  ACCUMULATIONS OF ONE HALF INCH TO ONE INCH EXPECTED TO BE FAIRLY
  WIDESPREAD. SOME LOCATIONS MAY EXCEED ONE INCH OF ICE FROM THIS
  STORM.

* IMPACTS...THIS MAY BE YET ANOTHER MAJOR ICE STORM FOR THE
  WESTERN AND CENTRAL COLUMBIA GORGE AND SURROUNDING VALLEYS.
  HEAVY ICE ACCUMULATION WILL LIKELY BRING DOWN SOME LARGE
  BRANCHES AND POWER LINES. POWER OUTAGES MAY LAST MULTIPLE DAYS
  DEPENDING ON HOW WIDESPREAD THESE IMPACTS ARE. THIS EVENT WILL
  ONLY ADD TO THE EXISTING HEAVY SNOW AND ICE LOADING ON
  ROOFTOPS...WHICH MAY CAUSE SOME ROOFTOPS TO FAIL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THERE IS THE POTENTIAL FOR THIS TO BE A MAJOR ICE STORM WITH SOME
AREAS POTENTIALLY EXCEEDING ONE INCH OF ICE ACCUMULATION.
RESIDENTS SHOULD BE PREPARED FOR EXTENDED POWER OUTAGES WHICH
COULD POTENTIALLY LAST MULTIPLE DAYS. ANYONE WITH TRAVEL PLANS
THROUGH THE GORGE TUESDAY OR WEDNESDAY SHOULD CONSIDER ALTERNATE
ROUTES, AS FREEZING RAIN IS EXPECTED TO MAKE CONDITIONS
TREACHEROUS ON AREA ROADS.

&&

$$

WEAGLE/NEUMAN
Updated: January 16, 2017 — 5:26 AM

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