This snow drama was at all times going to to be in three acts. The first was a teaser, the second was the principle act, and the third would be the transition from snow to rain.
The second act introduced substantial snow to the area, notably from 11 PM Friday via 9 AM this morning. Here are just a few reviews from this morning…and take into account that many had one other inch or two after these reviews.
Around 15 inches close to Olympia. 12 inches at Ocean shores. Seattle reaches Eight to 11 inches.
Public Information Statement
National Weather Service Seattle WA
1236 PM PST Sat Feb 13 2021
Location Amount Time/Date Lat/Lon/Elev (ft.)
Carbonado 18.zero in 1041 AM 02/13 47.08N/122.05W
9 WNW Alder 16.zero in 1016 AM 02/13 46.83N/122.47W
Three N Olympia 15.5 in 1135 AM 02/13 47.09N/122.89W
2 N Tanglewilde-Thomps 15.zero in 1118 AM 02/13 47.08N/122.77W
2 NNE Melbourne 15.zero in 1027 AM 02/13 46.98N/123.61W
Olympia 14.zero in 0950 AM 02/13 47.04N/122.89W
2 ESE Graham 14.zero in 1119 AM 02/13 47.05N/122.26W
5 SE Roy 14.zero in 0932 AM 02/13 46.94N/122.47W
Four SSE Rainier 13.zero in 1042 AM 02/13 46.84N/122.64W
2 SE Tanglewilde-Thomps 13.zero in 0855 AM 02/13 47.03N/122.75W
6 N Tanglewilde-Thomps 12.5 in 1000 AM 02/13 47.14N/122.80W
7 NW Dupont 12.5 in 1117 AM 02/13 47.18N/122.76W
5 S Vaughn 12.5 in 0909 AM 02/13 47.28N/122.77W
6 S Port Orchard 12.5 in 1206 PM 02/13 47.45N/122.66W
9 W Alder 12.zero in 1037 AM 02/13 46.82N/122.48W
1 SSE Lacey 12.zero in 1001 AM 02/13 47.03N/122.80W
1 NNE Stanwood 12.zero in 1110 AM 02/13 48.26N/122.34W
1 NE Bellevue 12.zero in 0745 AM 02/13 47.62N/122.19W
Ocean Shores 12.zero in 0930 AM 02/13 46.97N/124.16W
A snowfall map for the final 24 hr from the National Weather Service reveals the heaviest quantities between Portland and Olympia (as a lot as 15-20 inches), with 8-12 inches extending to the central Sound. Lighter quantities (4-6 inches) over Northwest WA.
The forecast fashions weren’t unhealthy, however overplayed the east-west variations. I might be trying into this deficiency through the subsequent few weeks (one in all my tasks is to enhance precipitation prediction by numerical fashions).
Now in regards to the third act!
Tomorrow morning, a trough of low strain related to a weak entrance will approaching our coast (see floor climate map for 10 AM under, the stable traces point out strain, the colour shading present low-level temperatures, and I put a dashed oval across the function of curiosity).
We may have some residual chilly air at low ranges and the preliminary precipitation might be snow, however it should slowly transition to a rain/snow combine through the late morning and afternoon.
This combined scenario is indicated by the forecast precipitation fro 10AM Sunday, with colours indicating snow and grey shades exhibiting rain.
By the night tomorrow will probably be all rain within the lowlands under 1500 ft and snow above. And Monday, we are going to see all rain and temperatures zooming up into the decrease 40s.
Finally, I ought to be aware that Portland and NW Oregon had a big freezing rain even in a single day, as warming temperatures aloft allowed rain above the floor that fell into subfreezing air close to the floor. As a consequence, the rain grew to become supercooled (nonetheless liquid water however under freezing) after which froze on contact with the chilly floor.
Portland and neighborhood are notably inclined to ice storms due to the prepared provide of chilly air popping out of the Columbia River Gorge. Seattle has no such chilly air supply, so ice storms are uncommon.
Here are some pictures from Oregon DOT:
The freezing rain weighed down branches and powerlines and resulted in over a quarter-million PGE clients loosing energy (that’s in all probability round 3/Four million folks). Here is the facility outage map this morning.
Enjoy the snow….it’s lovely. And will in all probability be the final lowland snow occasion this season.