Some instability in the upper atmosphere has allowed some cumulus clouds to form, hence the snow showers. High pressure is still expected to strengthen today for a period of dry and mostly clear weather.
Long-range: The high pressure cell is expected to be pushed south on Thursday allowing another round of fronts to track through the PNW. This system is entraining a large warm air mass which will likely cause rain below 5000’ on Thursday and Friday. Models diverge on their predictions for the weekend, but it will probably be rainy with a chance of some mixed snow.
24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = .10 Snow equivalent = Trace
Total inches of water by noon tomorrow = .10
Total inches of snow by noon tomorrow = Trace
Trend and Timing:
This morning’s radar has scattered snow shower centered over the mountains. The Puget Sound area is already clearing. Dry and more stable conditions develop during the next 12-24hrs.
24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 22 High: 32
Freezing level: 3000’ 4000’
Trend and Timing:
Temperatures and freezing levels will vary between 3000’ and 5000’ for the next few days. Freezing levels are expected to rise above 5000’ on Thursday/Friday.
24hr Winds Speed (mph)/Direction Starting at Noon Today:
Base: 0-5 NE
Ridge Top: 5-10 NNE
Trend and Timing:
North east flow will continue through the night. Westerly flow will take over tomorrow.
J.Meriwether
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