Low snow levels Monday ovenight
By Rod Hill on 2023-02-11
A strong cold front from the Gulf Of Alaska will bring sharply colder air arriving Monday. Weather models continue to show less than .50” of total precipitation in the valley Monday morning through early Tuesday with a sharp cutoff of measurable moisture around 5:00 a.m. Tuesday morning.
The snow level forecast in place looks good, calling for Monday snow levels to lower to 1,500’ by mid-afternoon and sticking snow possible down to 200 - 500 feet Monday overnight, ending early Tuesday morning. The low level moisture window is narrow, likely limiting snow accumulation below 1,000 feet to a dusting to 3” at most. Downtown Portland and other low level elevations will likely see ground temps hold in the mid 30s overnight into Tuesday morning, leaving roadways wet with snow or a snow mix of showers in the air Monday overnight. The snow forecast for 1,000 to 1,500 feet shows a possible 4 - 6” of snow. The precip may be showery in nature, meaning scattered variance in snow totals.
Over a foot of Monday through Monday night snow will fall over the Cascades at pass level and 6-8” of snow will be possible over the Coast Range. The forecast goes completely dry Tuesday afternoon with cold nights Wednesday morning showing coldest valley low temps in the mid 20s and widespread freezing temps Thursday morning.
Rod Hill
Arctic Air, Snow Track Update