wxmet

Low is further south on the GFS 18z result in cooler conditions closer to the surface especially with wet-bulbing. Also has increased the winds from the North at 950mb from 20 to 25 knots which should help with the CAA.

ECMWF 12z has a lot of precip early Sunday morning. Shows temps in the upper 30s though which is probably why the snow maps are not showing snow in the WPSL.

KSEA SREF means have jumped up a bit from previous runs (latest blue). Probably due to tracking the low closer. http://i65.tinypic.com/10yhx5k.png

Not much a difference between the GFS 00z and 12z as far as Seattle metro is concerned. Top-down Skew-T still looks similar aside from increased forcing in the dendritic growth zone combined with 10-20 mph winds from the North which should help support snow. Wet-Bulbling may help drop temps a degree in the lowest 25mb.

Pretty clean setup for 1-3 inches in the PSL, although surface temperatures will likely keep things on the lower end on that range. High pressure to the north flowing down NNE winds and low pressure tracking to the south.

Agree. The snow maps aren't really reflecting the potential. Strong CAA down the Pugent Sound Sunday morning. http://wx.graphics/models/ecmwf/2017110400/washington/ecmwf_uv10m_washington_42.png

GFS 00z Downtown Seattle Skew-T Sounding looks for pretty optimistic Sunday morning. Saturated dendritic growth zone combined with some decent mid-level lifting.

RGEM 00z 1-3" around Seattle with higher amounts to the south and east. Rain transitioning to moderate snow.

Like the look of the GFS 12z. Multiple opportunities for snow in the coming week. Shows it snowing the entire day on Friday.

Looks backed with Fraser River Outflow. Pretty windy through the Sound. http://www.tropicaltidbits.com/analysis/models/gfs/2017030500/gfs_mslp_wind_nwus_27.png

00z GFS looks pretty incredible for next weekend. Too bad we're not looking at this inside 48 hours. High pressure to the north keeping cold air in place and the low tracking to south with the best 700mb frontogenetical forcing to the north and west of the surface low is a prime setup for significant snowfall.

So far it's doing a good job of staying just north of the Metro

It's currently snow lightly downtown near the waterfront.

I wouldn't rely on it. Surface observations are the best bet.

Nice band heading to the southeast towards Seattle. Looks like it's strengthening with time.