110 FXUS66 KPQR 290504 AAA AFDPQR Area Forecast Discussion...UPDATED National Weather Service Portland OR 1004 PM PDT Sun Jun 28 2026 Updated Aviation Discussion .SYNOPSIS...A cool marine pattern remains in place through much of the upcoming week, keeping daytime temperatures below normal and skies generally cloudier than what is typical for late June. A few light showers will linger into this evening, mainly over the Cascades and nearby foothills, while most lowland locations trend drier. Shower chances stay limited Monday through Wednesday, then increase a bit on Thursday before a gradual warming trend develops heading into Friday and next weekend. && .DISCUSSION...Now through Saturday night...The overall forecast remains on track this late afternoon, with onshore flow still firmly established across northwest Oregon and southwest Washington. Northwest flow aloft and a cool marine air mass continue to favor below average temperatures across the area, and that general setup is not expected to change much through Friday. For most of the coming week, highs should top out in the mid 60s to low or mid 70s (coolest at the coast and mildest across the Willamette Valley and Portland metro). Cloud cover has behaved much as expected today, with extensive low clouds during the morning gradually giving way to at least partial afternoon clearing in some spots. This pattern of mostly cloudy nights and mornings followed by occasional afternoon breaks should continue through much of the work week. As for precipitation, shower coverage has diminished compared to Saturday, and much of the lowlands will remain dry for today. The main exception continues to be the Cascades and Cascade foothills, where moist upslope flow is helping maintain the best chance for occasional light showers into this evening. Amounts remain light, and no meaningful rainfall impacts are expected. Looking ahead to Monday through Wednesday, the forecast continues to favor mainly dry conditions for the interior lowlands, with only spotty light showers at times over the Cascades. Thursday brings a slight uptick in shower chances, now only focused around the north Oregon and south Washington coast and Coast Range, which is not surprising as the weak signal for measurable rainfall means forecasted amounts and location of rainfall can change quickly. Current guidance still supports only low-end probabilities for precipitation. Even at these locations, expected rainfall amounts appear light. By Friday into the holiday weekend, temperatures should begin to recover as the broader troughing influence weakens. Confidence remains higher in a warming trend than in the exact magnitude of that warming. At this point, the most likely scenario is for inland highs to climb into the mid to upper 70s Friday and then into the lower 80s by Saturday, July 4, while the coast likely remains in the 60s. Dry weather is favored during that period, but confidence on exact temperatures is still somewhat limited given the remaining model spread (72 to 83 degrees on Friday, 75 to 88 degrees on Saturday). ~12 && .AVIATION...Currently VFR inland and a mixture of MVFR/VFR along the coast. A weak upper level impulse, around 10Z-13Z Monday, will bring predominately MVFR conditions as well as a 15-20% chance of IFR conditions along the coast and a 35-60% chance for MVFR conditions for inland locations. After 19Z-21Z Monday conditions inland look to improve back towards VFR with CIGs between FL030-FL045, with MVFR conditions expected to persist along the coast with these conditions expected to persist through the remainder of the TAF period. North/northwest winds generally 5-10 kt, strongest from 22Z Monday through 05Z Tuesday. Gusts up to 20 kt possible through the same time period. KPDX AND APPROACHES...VFR conditions expected through the TAF period. A weak frontal passage around 10Z-13Z Monday will bring a 35-60% chance for MVFR conditions. After 19Z-21Z Monday conditions inland look to improve back towards VFR with CIGs between FL030-FL045. North/northwest winds generally 5-10 kt with gusts up to 20 kt possible 22Z Monday through 05Z Tuesday. /42 && .MARINE...Northwest winds around 10 to 20 kt with steep seas near 7 to 9 ft at 9 seconds driven mainly by a fresh northwest swell will continue through tonight. Weak high pressure builds over the coastal waters on Monday, however northwest winds will continue to build the ongoing northwest swell with significant wave heights increasing to 8 to 12 ft. Seas will be highest over the outer waters. There is a 30-50% chance significant wave heights will peak over 11 ft beyond 30 NM offshore on Monday, mainly to the north of Cape Falcon. Northwest winds and a fresh northwest swell then continues Tuesday through Wednesday, maintaining steep seas and hazardous conditions for small craft. Winds and seas will ease significantly Wednesday. Given steep seas and wind gusts upwards of 20 kt, a Small Craft Advisory is in effect through Tuesday evening, except through Sunday evening for the central and southern inner waters where winds and seas are relatively lower. ~12/23 && .PQR WATCHES/WARNINGS/ADVISORIES... OR...None. WA...None. PZ...Small Craft Advisory until 5 PM PDT Tuesday for PZZ251-271>273. && $$ www.weather.gov/portland Interact with us via social media: www.facebook.com/NWSPortland x.com/NWSPortland