A ridge of high pressure can be seen on satellite imagery this morning by the clearing skies that are spilling into Washington from British Columbia. Northcentral Washington today will see a break in the active weather, although it will be slightly cooler, just below seasonal normal for temperatures, afternoon highs should be in the lower to mid-40’s.
The quiet weather pattern will come to an end early Thursday as the winds aloft begin backing in from the north to the west with the approaching weather system moving into northwest Washington. There is a winter storm watch for the Cascades from Thursday morning to Friday evening where anywhere from 8-12” of snow could fall. Winds Thursday will become breezy to gusty out of the west mainly across the southern Columbia Basin before shifting to the west early Friday. Forecast for tomorrow calling for cloudy skies with a 30% chance of rain mixed with snow and windy out of the west 10-20 mph with afternoon highs in the mid 40’s.
Another shortwave trough of low pressure will push into the region from the north Friday morning following the one on Thursday. This will bring the potential for very light lowland rain mixed with snow, but most of the precipitation looks to be confined to the mountains. West winds will also persist on Friday with gusts up to 30 to 40 mph for the east slopes of the Cascades across the Columbia Basin. Expect cloudy skies Friday with a 40% chance of mainly rain showers, west wind 15-25 mph and gusty at times with afternoon high temperatures generally in the mid 40’s.
Our weather pattern turns much quieter for the weekend as an upper level ridge pushes into the Pacific Northwest Saturday late Saturday morning and continuing through the weekend. Weather forecast Saturday and Sunday calling for mostly sunny to partly cloudy skies each day and slightly warmer with highs in the mid to upper 40’s.
Monday and Tuesday will be nice as well with partly cloudy to mostly sunny skies and warmer with afternoon highs each day in the upper 40’s.