Marine Weather and Tide Forecast for Westport, OR

DISCUSSION
Saturday afternoon through Friday...Showers continue across NW Oregon and SW Washington this afternoon, more isolated in nature everywhere except for the Cascades where showers are more widespread as the front moves east of the Cascades. Rain last night and early this morning over performed in some areas, with many locations stretching from eastern Clark County, WA to around the Salem area and the adjacent foothills receiving around 0.5-1 inch of rain through 8 AM. Scattered showers will continue across the region this evening as another upper level low moves south to the Vancouver Island area. There's a slight (10-20%) chance of stronger showers and thunderstorms this afternoon and evening, as well. Any impacts of stronger showers or thunderstorms would be limited to heavy rain, brief gusty winds, and potentially a lightning strike or two.

Conditions trend drier on Sunday, though light isolated showers will persist into the afternoon as the disturbance over Vancouver Island becomes a cut-off low in eastern Washington. Weak ridging will build over the eastern Pacific and western Washington and Oregon, supporting partly sunny skies during the afternoon, though temps will remain 5- 8 degrees below average, topping out in the low 60s inland. Ensemble guidance is in good agreement for another weak weather system to cross through the PacNW on Monday with another round of light rain showers expected. Totals of 0.10-0.25 inches expected across the inland lowlands with totals of 0.3-0.5 inch across the coast and higher terrain of the Cascades. Zonal flow with another embedded disturbance passing to the north across southern Canada may maintain light showers into Tuesday and keeping daytime temperatures inland in the mid to upper 60s.

Ensemble agreement degrades for the middle to end of next week with WPC 500mb cluster analysis showing solutions split pretty equally between weak ridging and troughing developing. NBM guidance maintains minimal rain chances (generally 15% or less) Wednesday through Friday and continues to suggest temperatures gradually warm closer to average (around 69-70 degrees) toward the latter part of next week. -HEC/Batz

AVIATION
A weak front moves east of the Cascades, resulting in dissipating showers and improving conditions. As of 20Z Saturday, most of the airspace is VFR with CIGs around FL035 to FL050. Looks like a few terminals may bounce between VFR and MVFR until 21-22Z Saturday. Expect northwesterly winds around 10-15 kt with a few gusts to 20 kt between 20Z Saturday to 06Z Sunday. Winds will then shift westerly and remain around 5-10 kt.

There remains a 15-20% chance of thunderstorms across the Willamette Valley until 00-03Z Sunday. Any of these storms will be capable of producing small hail, gusty winds, and temporarily reduced CIGs and VIS, but probabilities are too low for inclusion in TAFs at this time.

PDX AND APPROACHES...Expect VFR conditions through the TAF period. Could see a brief return of MVFR conditions between 06-12Z Sunday (15-25% chance of MVFR CIGs ). Expect northwesterly winds around 10-15 kt with gusts to 20 kt until 06Z Sunday, then westerly around 5-10 kt for the remainder of the period.
~Hall

MARINE
Fresh northwest breezes will continue over the coastal waters today as a result of a frontal passage this morning. With resulting frontal passage conditions, expect low end Small Craft Advisory conditions through early Sunday as winds gust to around 25 kt. Seas will range from 6 to 8 ft, primarily driven by a westerly swell of 6 to 7 ft with a period of 9 to 10 seconds.

Calmer conditions are expected during the day on Sunday as high pressure moves overhead, bringing lighter west winds as the westerly swell persists at 5-6 ft. Another front will approach Sunday into Monday, strengthening winds and shifting them southerly. This front will likely warrant another round of headlines as models depict a 60-80% probability of wind gusts to 30 kt Sunday night through Monday afternoon. Additionally, there is a 20-40% chance of wind gusts reaching 35 kt. Seas look to increase towards the middle of next week as westerly swell builds to around 10 ft on Tuesday. ~Hall/CB

PQR WATCHES/WARNINGS/ADVISORIES

OR...None.
WA...None.
PZ...Small Craft Advisory until 11 AM PDT Sunday for PZZ210-251>253- 271>273.