572 FXUS66 KSEW 282136 AFDSEW Area Forecast Discussion National Weather Service Seattle WA 236 PM PDT Sun Jun 28 2026 .SYNOPSIS... Cloudy skies and cooler temperatures will continue for the majority of this week with a broad upper level trough over Western Washington. Weak weather systems will move through the area throughout the week, bringing chances of showers primarily for the mountains. A warmer and drier pattern is favored to develop this weekend. && .SHORT TERM /TONIGHT THROUGH TUESDAY NIGHT/... A broad upper level trough will remain over the Pacific Northwest for the majority of the week, allowing weak disturbances to pass through the region. The majority of locations are expected to remain dry and the highest chances for showers will be limited to the mountains. Overcast skies in the morning and below normal temperatures this week, with temperatures generally in the 60s and low temperatures in the low 50s. May see some breaks in the clouds in the afternoon, but generally expect skies to remain fairly cloudy, especially along the coast. 29 && .LONG TERM /WEDNESDAY THROUGH SUNDAY/... Cloudy skies and below seasonal temperatures will continue into the latter part of the week as long term guidance is in good agreement in keeping the broad trough over the Pacific Northwest through Thursday. A shift in the weather pattern is favored starting Friday as the majority of ensemble members highlight an upper level ridge building offshore in the Pacific. While there is uncertainty regarding the intensity of the ridge and axis location, the majority of members are in good agreement that Western Washington will be under the influence of a ridge this weekend. This will trend towards warmer temperatures and drier conditions. 29 && .AVIATION... Ceilings have been slow to lift this afternoon with a mix of VFR and MVFR. Guidance continues to suggest improvement for the interior terminals this afternoon (now looking after 22z) and conditions rebounding to VFR. There is moderate to high chances (50-70%) for MVFR cigs to return tonight/Monday morning after 06z-09z. In addition, there is a slight chance (15-25%) for IFR cigs between 11z-17z for Puget Sound terminals. Improvement to VFR expected for interior terminals after 22z-23z. Southwesterly winds 6-13 kt this afternoon for the interior terminals and more west-northwesterly along the coast/Strait of Juan de Fuca. Breezy winds this afternoon south of BFI, with gusts to 15-18 kt. KSEA...MVFR cigs continue to slow lift this afternoon, but still expecting VFR conditions this afternoon. There is moderate confidence (50-70%) for MVFR cigs to return as early as 09z Monday and low confidence (15%) for IFR cigs between 13z-17z. Improvement to VFR likely after 22z. Southwesterly winds generally between 6-10 kt through the TAF Period. Breezy winds this afternoon with gusts generally around 15 kt. 29 && .MARINE... The dominant weather feature will involve broad high pressure over the Pacific and lower pressure over the interior that will promote onshore flow through the week. This will lead to gusty northwesterlies over the coastal waters and steep, choppy seas. In addition, the central and east portions of the Strait of Juan de Fuca will likely see diurnally driven increases in westerlies that may reach small craft advisory strength at times. A small craft advisory is set to go into effect this evening. Wednesday looks to be the next strongest push, with probabilities around 45-65% of winds exceeding 21 kt. The offshore ridge looks to weaken late this week for lighter winds and subsiding seas. && .FIRE WEATHER... Little in the way of fire weather concerns remain in the picture well into the week ahead with upper troughing maintaining cool conditions, high RH, and periodic chances for shower activity. A trend toward more seasonable temperatures is indicated toward late week, but a significant warm and dry spell is not expected in the next 7 days. && .SEW WATCHES/WARNINGS/ADVISORIES... WA...None. PZ...Small Craft Advisory from 5 PM this afternoon to 1 AM PDT Monday for Central U.S. Waters Strait Of Juan De Fuca- East Entrance U.S. Waters Strait Of Juan De Fuca. Small Craft Advisory until 5 AM PDT Tuesday 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. && $$