Wet Spell

Last day of the week; last day of dry conditions for a spell.  Classic chilly late October morn’n at hand, so Mug up and read on.

A fairly small-scale Low pressure system is charting to arrive later this evening from the west, with most of the rain/wind impacting NW WA, southern BC.  Oregon will get some precip overnight tonight (Fri), as well.  Breezy.  Another, stronger system, charts to arrive Saturday night.  With plenty of cold air support, this storm will push a decent rain band inland as Sunday morning gets underway.  Blustery, with possible thunderstorm here & there around the PNW.  Notably cooler!  Snow level will drop in the Cascades, so expect several inches above the passes by Mon the 28th, as the Low center drifts south along the WA coast, moving onshore around Astoria.  Cumulative weekend precip range around 3/4" to 1.25", depending on your location.  

Next week will start out with lingering showers on Mon, with a short break Tue (leaf cleanup day), cool temps.  Next system will present itself on Wed Oct 30 with lots of moderate rainfall and another dip in the temperatures after the front passes.  Blustery day, as well.  Thu, Halloween, will be chilly & showery, as the storm’s center Low pressure moves onshore farther south than Sunday’s system - say, Lincoln City area - around noon.  Blustery.  Trick or Treat time should be dry, but quite chilly for the costume walkers.  Friday, the first day of November, looks dry until late night, as another weak storm moves onshore overnight into Sat.  Not much precip with this one.

Sat/Sun Nov 2,3 trends as dry & and a bit warmer than the previous several days.  Could be foggy Sunday morning.

Models have ’struggled’ with solutions for the early week of November, as we indicated previously.  Latest models runs keep it generally DRY and relatively mild from the first weekend in November through Tue Nov 5 - ELECTION DAY - except for the far NW corner of WA and Vancouver Island region on the 5th.  A small, tightly packed Low may move onshore over southern BC, draping a rain band across western WA overnight Tue.  Dry elsewhere on through the balance of the week, Nov 4-8.

Early yet, but the PNW could move into another wet/cold cycle around Nov 11, as the Pacific High could shift farther west over the Gulf of Alaska, setting up the potential for development of a 'Yukon Dome’ and lower elevation snow mid-Nov.  All conjecture, of course, but worthy of a ponder.