000 FXUS66 KSEW 262201 AFDSEW Area Forecast Discussion National Weather Service Seattle WA 301 PM PDT Fri Apr 26 2024 .SYNOPSIS...A series of frontal systems will impact the region into early next week. A trend toward somewhat drier conditions and temperatures closer to normal is expected for the later half of next week. && .SHORT TERM /TONIGHT THROUGH MONDAY/...Scattered showers continue across Western Washington this afternoon as an upper trough axis shifts eastward across the area. Thanks to a few sun breaks, high temperatures will nudge upward slightly over yesterday. After a brief drying trend overnight, another front will spread additional precipitation across the region Saturday into Saturday night. Another system arrives on Sunday with a trailing upper trough moving onshore on Monday to keep conditions damp and cool. Temperatures aloft cool enough on Monday to support at least a slight chance of thunderstorms. Snow levels will gradually come down over the weekend...with some light snowfall expected in the passes Sunday night into early Monday. .LONG TERM /TUESDAY THROUGH FRIDAY/...Another trough and associated front sweeps across the area on Tuesday. The latest suite of ensembles are beginning to hint at a modest warming and drying trend for the later half of next week with some weak upper ridging taking up residence offshore. There is still considerable uncertainty regarding its strength. And, accordingly, the 50th percentile NBM numbers retain chance PoPs and temperatures near normal Wednesday through Friday. A fair number of the GFS ensemble members suggest that Seattle could crack 70 degrees late next week while Euro members remain, as they often do, on the more conservative side. Either way, the distant portion of the extended forecast looks more promising if you`re on team spring. 27 && .AVIATION...Upper level trough moving east later tonight into Saturday morning. Next front reaching the area late Saturday afternoon/Saturday evening. Ceilings around 5000 feet improving to aoa 7000 feet after 06z. Ceilings lowering 17z-21z to MVFR with MVFR ceilings continuing into Saturday night. KSEA...Ceilings aoa 6000 feet lowering to MVFR 18z-21z Saturday. MVFR ceilings continuing into Saturday night. Variable wind 4 to 6 knots becoming southerly 4 to 8 knots by 04z. Felton && .MARINE...Weak surface low over the coastal waters will dissipate this evening. Next front reaching the coastal waters Saturday afternoon moving inland late Saturday afternoon/Saturday evening. Small craft advisory winds over the coastal waters with and behind the front Saturday into Sunday morning. POssible small craft advisory winds behind the front in the Central and Eastern Strait of Juan de Fuca late Saturday night. Weak surface high pressure over the waters Sunday and Monday with another front arriving Tuesday. Stronger high pressure building over the waters behind the front Tuesday night into Wednesday. && .HYDROLOGY...No river flooding is expected over the next seven days. && .SEW WATCHES/WARNINGS/ADVISORIES... WA...None. PZ...Small Craft Advisory from 8 AM Saturday to 2 AM PDT Sunday for Coastal Waters From Cape Flattery To James Island 10 To 60 Nm-Coastal Waters From Cape Flattery To James Island Out 10 Nm-Coastal Waters From James Island To Point Grenville 10 To 60 Nm-Coastal Waters From James Island To Point Grenville Out 10 Nm-Coastal Waters From Point Grenville To Cape Shoalwater 10 To 60 Nm-Coastal Waters From Point Grenville To Cape Shoalwater Out 10 Nm. && $$
NWS SEW Office Area Forecast Discussion