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Saturday, May 25, 2013 | 1:57 p.m.

Morgan Palmer's Weather Blog

Posted: 10:59 a.m. Sunday, Dec. 23, 2012

A White Christmas for some parts of Western Washington 

Snow in Kitsap County
Snow in Kitsap County

By Morgan Palmer

The forecast continues to be of great interest for Monday night and early Christmas morning as temperatures will support frozen precipitation as a moisture-laden front moves in from the west.

Most of the area will see a rain/snow mix or all snow Christmas morning, though accumulations are going to be spotty in the lowlands around Seattle, Tacoma and Everett.

The set-up

Temperatures will cool over the lowlands into the middle 30s by early Christmas morning as the approaching front begins to spread precipitation in at the coast.  Easterly wind will dry the atmosphere across the lowlands somewhat ahead of the precipitation, delaying the onset of snow.  

Forecast models continue to show precipitation -- falling as snow -- beginning before dawn over Hood Canal, and south/west of Olympia before spreading farther inland after 7 a.m.

Some of the trends I'm watching show a slightly later onset of precipitation across the Seattle area and other lowland locations, which will likely limit accumulation threats near the water.  

However, on higher hills, a few inches of slushy snow could accumulate in the few hours after dawn before snow or snow/rain mix turns over to rain.  

For most of us, this looks like a similar situation to Wednesday when a few spots around the metro got more persistent snow that stuck and briefly turned things white.  

Right now, we are not looking at a major lowland snow event along I-5 and metro areas from Tacoma to Seattle and north, but it will still bear close watching as an earlier onset of precipitation well before dawn will create a greater hazard.

A better chance of accumulating snow does reside in higher hills near Olympia and south/west, and possibly closer to the water in the South Sound.   

Seattle, on average, has a seven percent chance of seeing an inch of snow on the ground on Christmas Day.  It probably won't happen this year.  It last occurred four years ago.

 

Hood Canal once again looks to get slammed

The major attention looks to be be -- once again -- across Hood Canal and areas of Kitsap and Mason Counties.  

In fact, Tuesday could serve up an even more significant snow event in some spots than what was seen there last week.  

Snow will begin in these areas by 4 a.m. and linger well into the morning.  

Areas around Shelton across the southern tip of Hood Canal and into central and north Kitsap County may receive 3-6 inches of snow by mid-morning Tuesday before slowly turning over to rain around noon.  

Farther west, the Olympic Mountains will act as a "dam" to the southeasterly wind flow, and cold air will be trapped right along Hood Canal.  

Snow will continue throughout the morning and probably right into the afternoon along the western part of the Canal from Seabeck to Hoodsport.  

A few spots right at the base of the Olympics (like Hoodsport) could get dumped on to the tune of a foot of snow.  

If this scenario occurs, significant power outages are possible with tree limbs and trees coming down under this heavy, wet snow.

 

More fresh powder for the mountains

Santa couldn't have served up better snow for the resorts the past few weeks (though we've had travel troubles).

While we'll see light snow on Sunday and little or no snow Monday, the mountains will get plenty more dumpage starting Christmas Day.

Upwards of 1-2 feet of new snow remains forecast in the Tuesday-Wednesday time frame with some drying by late next week.

Avalanche danger will remain high. 

Morgan Palmer

About Morgan Palmer

Meteorologist Morgan Palmer serves as meteorologist for weekday editions of KIRO 7 Eyewitness News. Morgan began "chasing" storms as a Skywarn severe storm spotter while a teenager and continues to pursue severe storms when time permits.

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