Arctic Air Next Week?

Note: this can change

Next week: models today have started hinting at really cold air coming in next week.

The reason for this cold is the upper level high over us currently is going to move west. But how far it moves west will make it depend on how cold it will get.

The image below shows today's mornings 12z GFS-WRF 500mb temps.

Notice how the cold air (purple color) is right over Washington and Oregon

however 

Tonight's 00z GFS-WRF 

Notice how the purple has moved more east on this run 

So bottom line is it will depend on how far this high pressure moves west if it moves not to far then no arctic air, if it moves farther away then we get arctic air.

Also here is a image of the 12z euro ensembles showing the 850mb temps

   Most of them are scattered  but there is a large group that brings the temps down to -10c

For skiers and snow boarders:

Timberline forecast:

Thursday: Sunny, with a high near 34. East wind between 11 and 15 mph, with gusts as high as 18 mph. 

Thursday Night: Mostly clear, with a low around 20. Light wind becoming west northwest between 12 and 15 mph. Winds could gust as high as 20 mph.

Friday: Sunny, with a high near 32. North wind between 7 and 16 mph, with gusts as high as 20 mph. 

Friday Night: Mostly clear, with a low around 24. East northeast wind between 7 and 9 mph. 

Saturday: Sunny, with a high near 34. 

Saturday Night: Mostly clear, with a low around 33. 

Sunday: Sunny, with a high near 35. 

Thanks for reading 

-Michael