Unusually Mutual Depression Temperature Air In Addition To Fifty-Fifty The Risk Of Lite Lowland Snowfall Volition Hitting The Pacific Northwest
By belatedly March, the threat of lowland snowfall is usually over, temperatures are warming, too 1 starts thinking of gardening too hiking.
But during the side past times side few days our relatively normal temperatures of the past times calendar week volition cool substantially too some portions of lowland Washington too Oregon may larn some lite snow.
The reason? Influenza A virus subtype H5N1 deep upper-level trough moving southward into the eastern Pacific.
The electrical flow (5 AM Wed) upper marking map at closed to 30,000 ft (see below, amongst air current speeds shown past times color too air current parallel to the summit lines) already shows substantially troughing (lower pressures or heights) over the eastern Pacific, amongst a jet flow (stronger winds, yellowish colors) good due south of the Northwest. Strong southwesterly menstruum volition pick out a lot of wet into California too large amounts of atmospheric precipitation there. The jet flow is associated amongst a large horizontal temperature contrast (cold north, warm due south of it), too so nosotros are on the mutual coldness side.
But the province of affairs is most to larn to a greater extent than exciting for us every bit the depression to our due north greatly amplifies too moves southward (see the same map for eleven AM Fri below). The jet flow (yellow areas) volition even too so hold upward due south of western Washington too Oregon too northern California volition stay wet.
Now lets plow to a surface nautical chart (sea marking pressure, 3000 ft temperatures--colors, too surface winds). The mutual coldness bluish temperatures exhibit a lower atmosphere that is mutual coldness plenty for snowfall to autumn below roughly yard ft. The work for getting snowfall at sea marking amongst such a designing is that the menstruum is onshore (the sea is a WARM 50F).
So what arrive at the model snowfall forecasts show? Here is the 24 full snowfall (not accumulation) ending v AM Friday. Some really lite snowfall (flurries) nigh sea marking too mayhap an inch or too so on the Kitsap where upslope menstruum volition arrive at greater intensities (which helps pick out snowfall to the surface). Plenty of snowfall inwards the mountains too peculiarly the Olympics.
The side past times side 24hrs? Snow inwards the mountains extending downward to roughly yard ft.
The bottom line: nosotros are instantly guaranteed of going into the summertime amongst a really good for yous snowpack. And amongst our reservoirs inwards fantabulous shape, H2O supplies for the population too agriculture are secure.
Such a rigid terminate to the flavor is typical of La Nina years, too this 1 is non disappointing.
But during the side past times side few days our relatively normal temperatures of the past times calendar week volition cool substantially too some portions of lowland Washington too Oregon may larn some lite snow.
The reason? Influenza A virus subtype H5N1 deep upper-level trough moving southward into the eastern Pacific.
The electrical flow (5 AM Wed) upper marking map at closed to 30,000 ft (see below, amongst air current speeds shown past times color too air current parallel to the summit lines) already shows substantially troughing (lower pressures or heights) over the eastern Pacific, amongst a jet flow (stronger winds, yellowish colors) good due south of the Northwest. Strong southwesterly menstruum volition pick out a lot of wet into California too large amounts of atmospheric precipitation there. The jet flow is associated amongst a large horizontal temperature contrast (cold north, warm due south of it), too so nosotros are on the mutual coldness side.
But the province of affairs is most to larn to a greater extent than exciting for us every bit the depression to our due north greatly amplifies too moves southward (see the same map for eleven AM Fri below). The jet flow (yellow areas) volition even too so hold upward due south of western Washington too Oregon too northern California volition stay wet.
Now lets plow to a surface nautical chart (sea marking pressure, 3000 ft temperatures--colors, too surface winds). The mutual coldness bluish temperatures exhibit a lower atmosphere that is mutual coldness plenty for snowfall to autumn below roughly yard ft. The work for getting snowfall at sea marking amongst such a designing is that the menstruum is onshore (the sea is a WARM 50F).
So what arrive at the model snowfall forecasts show? Here is the 24 full snowfall (not accumulation) ending v AM Friday. Some really lite snowfall (flurries) nigh sea marking too mayhap an inch or too so on the Kitsap where upslope menstruum volition arrive at greater intensities (which helps pick out snowfall to the surface). Plenty of snowfall inwards the mountains too peculiarly the Olympics.
The side past times side 24hrs? Snow inwards the mountains extending downward to roughly yard ft.
Looking at the full over the side past times side 72 hours volition pick out smiling to all skiers, snow-shoers too so enjoying wintertime recreation. Our regional mountains, already amongst an above-normal snowpack, volition larn a substantial hitting of novel snowfall (1-2 feet at higher elevations). Northeast Washington gets to a greater extent than snow.
The bottom line: nosotros are instantly guaranteed of going into the summertime amongst a really good for yous snowpack. And amongst our reservoirs inwards fantabulous shape, H2O supplies for the population too agriculture are secure.
Such a rigid terminate to the flavor is typical of La Nina years, too this 1 is non disappointing.
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