Area Forecast Discussion
Issued by NWS Seattle/Tacoma, WA
Issued by NWS Seattle/Tacoma, WA
753 FXUS66 KSEW 070253 AFDSEW Area Forecast Discussion National Weather Service Seattle WA 753 PM PDT Sun Jul 6 2025 .SYNOPSIS...Western Washington will see a warming trend as a ridge of high pressure dominates into Tuesday. A weak system will bring a brief cool down and a chance of light showers midweek before high pressure rebuilds for the latter part of the week leading to a return of warmer temperatures and dry conditions. && .SHORT TERM /TONIGHT THROUGH WEDNESDAY/...Temps were in the upper 70s to lower 80s in the interior today and we`ll see Monday`s readings a few degrees warmer. NW winds will keep the coast cooler and in the 60s. 33 Previous discussion...An upper level ridge of high pressure will continue to strengthen and move over Western Washington through Monday. This will lead to continued clear skies and a warming trend. Temperatures will be several degrees above seasonal averages. The Seattle metro area southward has a moderate HeatRisk on Tuesday, affecting heat-sensitive individuals. Ensemble guidance indicates that a weak trough crossing British Columbia will have some influence on Western Washington Tuesday night into Wednesday. This will promote increased cool onshore flow and a chance for light showers, especially along the coast and in the North Cascades. .LONG TERM /THURSDAY THROUGH SUNDAY/...Conditions should start to rebound slightly on Thursday. While some lingering clouds and isolated light showers are possible, the overall trend will be towards partly sunny skies and temperatures in the 70s for interior areas. As the midweek trough moves eastward, upper level ridging is expected to rebuild over the region by late week. Temperatures will begin to climb back into the mid 70s to low 80s across the interior lowlands. Another weak front might brush the area late next weekend. && .AVIATION...Northwesterly to westerly flow aloft as ridging gradually builds over western Washington. Onshore flow will continue in the lower levels. VFR conditions will continue to persist at all terminals this evening as benign conditions remain. Marine stratus will hug the coast tonight and into Monday morning, likely bringing MVFR/IFR conditions to KHQM and potentially KOLM. Elsewhere, VFR will remain through Monday. Northerly winds persist around 8 to 12 knots. KSEA...VFR conditions will continue throughout the TAF period. N/NE winds 8 to 12 knots throughout the evening will decrease overnight to 4 to 8 knots and will increase again Monday afternoon. Mazurkiewicz/18 && .MARINE...Surface high pressure currently offshore will remain there until early this week. Diurnally driven westerly pushes down the Strait will continue over the next several evenings as lower pressure remains inland. The westerly push tonight is weaker than the previous couple of nights and looks to remain above any small craft criteria. Although, cannot rule out a few rogue gusts of small craft strength here and there, as it will remain rather brief. A quick-moving frontal system will cross the waters Tuesday night into Wednesday, bringing an uptick in wind and seas, but at this time it looks too weak to have any significant impact. Combined seas generally around 4 to 6 feet will stay throughout the first half of the week. Continuous northerly winds may create steep seas at times throughout the week. Mazurkiewicz/18 && .SEW WATCHES/WARNINGS/ADVISORIES... WA...None. PZ...None. && $$