TILLAMOOK COUNTY EMERGENCY MANAGEMENT: Continuation of Winter Weather into the Weekend

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KEY POINTS

  • Heavy snow to continue in the Cascades and Cascade foothills into the weekend.
  • Snow levels will drop to near the valley floor early Friday.
  • Several inches expected in east Columbia River Gorge and Upper Hood River Valley through Friday.
  • Strong winds to produce high end Gale Force winds and hazardous seas across the coastal waters Friday.

Coast Range and Willapa Hills above 1500 feet

Snow

     Impacts:  Accumulating snow at elevations above 1000 feet.

     Timing: Today through Friday afternoon

     Confidence: Moderate to High

• Snow showers to continue Wednesday becoming heavy overnight into Thursday    morning

• 3 to 5 inches likely starting Wednesday afternoon through Thursday afternoon between 1000-1500 ft

• Highest accumulations are expected in the Oregon Coast Range between Jewell and Eddyville

• Accumulations up to 10 inches possible across the highest terrain by Thursday afternoon.

• Snow showers will weaken Thursday but will bring another round of snow late Thursday night in Friday.

River Flooding

          Impacts:  Potential for river flooding in the Coast Range

         Timing:  Friday night into Saturday

          Confidence:  Low

• Band of heavy precipitation will form just offshore Friday night into Saturday if it shifts inland by 50 miles 1-2″ of rain are possible.

• Rapid rises on coastal rivers become possible.

 

Coast and Coastal Waters

Marine / Coastal

        Impacts: Strong Gales and Hazardous Seas

        Timing: Friday

       Confidence: High

• Strong southerly winds will produce wind gusts 50-55 mph along beaches and headlands.

• Strong Gales expected ahead of a cold front Friday afternoon with wind gusts to at least 50 mph.

• Coastal jet will setup for a 2-3 hour period potentially reaching into Storm Force gusts near the surface right ahead of the front but

probabilities are low, less than 10% at this time.

• Seas will easily build into the mid to upper teens within the southerly winds producing Hazardous Seas into Friday night.

• 20-30% chance seas will build to 20 ft.

• A west, northwesterly swell will contribute in producing a chaotic sea state during this time.