- Winter Storm Watch in effect from Tuesday, 4:00 AM PST until Tuesday, 6:00 PM PST.
- Area Flood Watch in effect from Tuesday, 10:00 AM PST until Thursday, 4:00 AM PST.
Source: U.S. National Weather Service
…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.
…FLOOD WATCH IN EFFECT FOR THE NORTH OREGON COAST AND COAST RANGE…PORTLAND/ VANCOUVER METRO AREA…COLUMBIA RIVER GORGE…AND SOUTHWEST WASHINGTON FROM THE WILLAPA HILLS TO THE SOUTH WASHINGTON CASCADES…FROM TUESDAY MORNING THROUGH LATE WEDNESDAY NIGHT…
* FLOOD WATCH FOR PORTIONS OF NORTHWEST OREGON AND SOUTHWEST WASHINGTON…INCLUDING THE FOLLOWING AREAS…IN NORTHWEST OREGON…CENTRAL COLUMBIA RIVER GORGE…COAST RANGE OF NORTHWEST OREGON…GREATER PORTLAND METRO AREA…LOWER COLUMBIA…NORTH OREGON COAST…UPPER HOOD RIVER VALLEY AND WESTERN COLUMBIA RIVER GORGE. IN SOUTHWEST WASHINGTON…CENTRAL COLUMBIA RIVER GORGE…GREATER VANCOUVER AREA…I-5 CORRIDOR IN COWLITZ COUNTY…SOUTH WASHINGTON CASCADE FOOTHILLS…SOUTH WASHINGTON CASCADES… SOUTH WASHINGTON COAST…WESTERN COLUMBIA RIVER GORGE AND WILLAPA HILLS.
* FROM TUESDAY MORNING THROUGH LATE WEDNESDAY NIGHT
* FREEZING LEVELS WILL RISE TO OVER 8000 FEET MONDAY NIGHT LEADING TO RAPID SNOW MELT. IN ADDITION…HEAVY RAIN BEGINNING TUESDAY WILL CAUSE SHARP RISES ON RIVERS AND CREEKS DRAINING THE COAST RANGE…SOUTH WASHINGTON CASCADES…AND WILLAPA HILLS.
* RAINFALL AMOUNTS THROUGH THURSDAY…
*PORTLAND/VANCOUVER METRO AREA……1.5 TO 3 INCHES
*NORTH COAST RANGE/WILLAPA HILLS….4 TO 8 INCHES
*SOUTH WASHINGTON CASCADES……….4 TO 8 INCHES
* IMPACTS…
*STREET FLOODING IS POSSIBLE IN URBAN AREAS WHERE ICE AND SNOW MAY BLOCK STORM DRAINS.
* RIVERS OF CONCERN INCLUDE THE GRAYS IN WAHKIAKUM COUNTY…THE LOWER NEHALEM AND WILSON IN TILLAMOOK COUNTY…THE UPPER TUALATIN IN WASHINGTON COUNTY…THE MARYS IN BENTON COUNTY…AND JOHNSON CREEK IN CLACKAMAS COUNTY.
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.
LANDSLIDES AND DEBRIS FLOWS ARE POSSIBLE DURING THIS FLOOD EVENT. PEOPLE…STRUCTURES AND ROADS LOCATED BELOW STEEP SLOPES…IN CANYONS AND NEAR THE MOUTHS OF CANYONS MAY BE AT SERIOUS RISK FROM RAPIDLY MOVING LANDSLIDES.
