The National Weather Service in Seattle is forecasting the possibilities of snow across Western Washington into Tuesday of the coming week. After a wet Saturday, a system south of the area could bring the potential for lowland snow late Sunday night and Monday.
However, a Saturday morning update says that models have backed off a bit on the potenal for lowland snow Monday, with one model in parcular reversing its solution significantly. As such, they have lightened the forecast slightly to fall in line with overall trends, keeping the highest chances for lowland snow confined to southern portions of Thurston and Pierce counes as well as Lewis county.
Snow levels this morning and again Sunday morning will remain low enough to allow for any morning precipitation to fall generally as a mix of rain and snow, although locations on hilltops may see some hit and miss snow showers. Temperatures both Saturday and Sunday are still expected to reach into the lower 40s and as such, any snowfall is not expected to stick to surfaces or accumulate.
Models have had a difficult time determining the track of a weather system to the south expected to mainly impact Oregon. Previous model forecasts have varied, sometimes wildly, with how far north associated precipitation, likely cold enough to be snow, will make it into Washington. A broad-strokes trend in most of the forecasts suggests that the best chances for any lowland snow will remain south of the Seattle Metro Area, although portions of Pierce, Thurston and Lewis counties could see some snow accumulation. Given that model forecasts have yet to approach a consensus, it is encouraged to stay tuned to future forecasts and briefings as hopefully, a clearer picture will emerge.
Today and Sunday
Scattered showers with a
Sunday night and Monday
Snow levels will fall once again to near sea level and will have difficulty recovering through the day Monday with afternoon high temperatures only reaching the upper 30s. A high degree of uncertainty surrounding which path a low pressure system will take as it passes through Oregon will affect how far north precipitation will extend into Washington. At this me, conditions will be cold enough so that any precipitation that does fall will fall as snow. Current forecast suggests lowland snowfall amounts from midnight Sunday night through midnight Monday night are expected to be less than 2 inches, but this will be spread out over the 24 hour period and, again, highly variable.