Updated Saturday 11:30 p.m.
Saturday was the 'tweener' day...a break between vigorous late fall storms. Scattered showers alternated with sunbreaks, both in the lowlands and over the Cascades. In general, the passes were much more 'pass-able' than they were during the white-out conditions on Friday, but occasional snow still made driving tricky over both Stevens and Snoqualmie Pass. Some of the showers included thunder, lightning and hail, but for the most part it was a quieter weather day. Highs maxed out on either side of 50 degrees, which is pretty typical for late November.
A juicy, gusty storm plows in our direction overnight, so look for increasing rain and wind on Sunday. Southerly winds will blow to about 35 mph over the waters of Puget Sound, and 40 to 45 near the coastal headlands by the Pacific. Rain amounts could tally between a quarter inch to an inch in the low terrain, and heavy mountain snow to the tune of 6 to 12" will fly over the Cascades. The heavier amounts will tally up near the volcanic peaks, but even the passes will have a solid coating. Sunday is always a major travel day over the mountains, but traffic may be even heavier tomorrow due to it being Thanksgiving week. Any mountain travelers should prepare for winter driving conditions, so pack blankets, flashlights, gloves and chains if you're heading between Eastern and Western Washington on Sunday. Afternoon highs from Everett to Olympia will hover again near the 50 degree mark, but it will be a soggier, more blustier '50' than the day before..!
Monday will provide another relative respite before another round of November moisture moves over us on Tuesday. The rest of the week looks similar, with new disturbances due in about every 36 hours. Our upper air pattern will be a bit ridge-y, so temps will hit the middle 50s (warmer than average by several degrees) by mid-week. Regardless, it will still be wet at times right through Thanksgiving and on into next weekend, too.
Have a great weekend,
Meteorologist Shannon O'Donnell
The KOMO4 Forecast Team