SHORT TERM
(Today through Saturday)...
Upper level trough moving across the Pacific NW early this morning.
While am not expecting any rain, will have an uptick of onshore flow across the region. This will allow for breezy west to northwest winds over the higher terrain, and through the Columbia Gorge.

Otherwise, high pressure offshore will build inland today into Saturday. After area of morning clouds, mainly along the coast and inland valleys (Cowlitz and lower Columbia into the lower Willamette), will have partly to mostly sunny skies. Temperatures will be down a few deg as compared to those yesterday.

Clearing tonight, and cool. Many areas will drop back into the mid-40s overnight for lowlands, and 30s across the higher Cascades.
After the cool start on Saturday, will see another quite pleasant late summer day, with temperatures back into the 60s along the coast, and lower to middle 70s for interior valleys. Looks like Mother Nature is giving us a nice last day of summer. /Rockey

LONG TERM
Sunday through Thursday...Sunday looks to feature a fairly zonal upper level flow regime across the Pacific Northwest, maintaining dry and seasonable weather with inland high temperatures in the mid to upper 70s. A weak upper level disturbance skirting the Canadian border will bring a slight chance of rain across southwest Washington and far northwest Oregon Sunday evening into Sunday night, but expect most locations to ultimately remain dry. Medium range guidance continues to converge on a warmer and drier solution for the start of next week, with ensemble clusters and 12z deterministic models both showing good agreement on an upper level ridge building over the Pacific Northwest on Monday and shifting inland on Tuesday. This will bring well above normal temperatures to the area on Tuesday as highs climb into the mid to perhaps upper 80s in the interior valleys. The potential for temperatures higher than that appears rather minimal as latest probabilistic guidance gives only about a 10 percent chance to reach 90 degrees in the Portland area and closer to a 30 percent chance from Salem to Eugene. Any heat concerns look to be limited to just Tuesday as the ridge shifts east of the region and temperatures trend back down mid to late week. Guidance also depicts a short lived period of offshore flow developing late Monday into early Tuesday. Not overly concerned about east winds at this time given the progressive nature of the pattern and fairly modest offshore pressure gradients, but will be something worth keeping an eye on for those in the fire weather community as roughly half of European ensemble members depict wind gusts reaching 25 mph in the vicinity of the Columbia River Gorge late Monday into early Tuesday. Still some uncertainty beyond Tuesday as the ridge shifts east to the Rockies, with guidance remaining split on the strength and timing of an upper level trough arriving Wednesday into Thursday. NBM mean solution depicts temperatures moderating to near seasonal norms with chance to slight chance PoPs returning to coastal and northern parts of the area during the middle of the week. /CB

AVIATION
High pressure continues to persist over the airspace through the weekend. Remaining clouds will continue to scour out over the next few hours, which will result in widespread VFR under mostly clear skies across the airspace. Winds will remain out of the north/northwest with gusts up to 25 along the coast. With said highest gusts near KONP and southward from 20Z Friday through 05Z Saturday.

Clearing skies today could result in some IFR/LIFR conditions for locations within the Willamette Valley. However, with the general warming trend for the air space, will only have a 10-20% probability of the IFR/LIFR conditions manifesting with a likely start time around 12Z-14Z Saturday.

PDX APPROACHES...VFR under clearing skies. 10-20% probability of IFR/LIFR conditions at or near the terminal starting around 12Z Saturday. /42

MARINE
Minimal changes in the marine environment as high pressure lingers over the area. Winds will be northwesterly through much of the week with the gustier conditions through the next 12 hours. While the Small Craft Advisory expires this morning, there may still be gusts up to 25 kt in the outer waters west of 30NM through 0700. Given they will not be widespread have not extended the advisory. Winds will slowly ease with gusts up to 20 kt for the foreseeable future due to the high pressure.

On Sunday, a weak front will move over the waters. This front is not overly strong so it will have minimal impact other than showers north of Tillamook. -Muessle

PQR WATCHES/WARNINGS/ADVISORIES

OR...None.
WA...None.
PZ...Small Craft Advisory from 4 PM this afternoon to 10 PM PDT this evening for PZZ210.