I do not need to hype the scenario, however I do suppose some snowflakes will descend on parts of the western lowlands subsequent Tuesday and Wednesday.
For instance, beneath you discover the ocean stage stress and temperature (925 hPa, about 800 m aloft) for Tuesday at 4AM. Blue colours are chilly sufficient for snow—and such chilly air extends over a lot of the area.
The every day highs and lows in Seattle for the subsequent week from the Nationwide Climate Service Nationwide Mix of Fashions, exhibits the cooling pattern all the way down to highs within the mid-40s. Not almost as chilly as in December, however Tuesday and Wednesday mornings might be chilly sufficient for snow.
However will there be moisture?
A entrance will transfer by tonight, bringing rain to the western lowlands and lightweight snow within the mountains. The truth is, the newest radar imagery clearly exhibits the rain, which quickly reaches Puget Sound.
The quantity of snow within the mountains tonigth might be comparatively modest (see complete by 1 AM Saturday beneath). Only some inches.
The second half of Friday, Saturday, and most of Sunday ought to be comparatively dry, with highs within the lowlands round 50F. Affordable for a stroll, run, or cleansing up the backyard.
However then on late Sunday and Monday morning, a reasonably sturdy upper-level trough will transfer in (see beneath), which can usher in cooler air and a few precipitation on Monday and early Tuesday.
Will there be any precipitation round when it turns into chilly sufficient to snow on Tuesday morning?
The snowfall complete by Tuesday morning from the European Middle mannequin suggests loads of snow within the mountain, and sure, a band of sunshine snow close to SeaTac, and extra snow over SW Washington (see beneath).
Keep tuned. Extra particulars as we get nearer in time.
