Marine Weather and Tide Forecast for Westport, OR

UPDATE
Saturday morning through Sunday...A surface cold front did bring a quick-moving band of light rain to most of southwest WA and northwest OR early Saturday morning around sunrise, however observed rain amounts with this band of rain generally ranged between a trace to a few hundredths of an inch. Just enough to wet the ground is most locations, but that was about it. Although rain is over with for the remainder of the day, still expecting occasional light rain showers to return on Sunday, especially during the afternoon hours with daytime heating. Forecast soundings suggest convection on Sunday will be quite shallow, thus limiting the potential for small hail or lightning. Thunder probabilities are less than 5-10% and are not high enough to warrant a mention of thunderstorms in the forecast. No impacts are expected with the showery activity on Sunday, and any rain that does fall will be beneficial as the area is now running below normal for precipitation so far this month due to recent warm and dry weather. -TK

DISCUSSION
Saturday through Friday...A very weak shortwave trough in the process of moving through the area right now, bringing a switch to weak onshore northwesterly flow throughout Saturday. Gusts generally below 10-12 kts throughout the upcoming weekend, with the exception of The eastern Gorge (Hood River County and eastward), which could see slightly stronger wind gusts up to 20-25 kts. No precipitation expected Saturday, as the system is just too weak, and the surface layer too dry for any precipitation to really reach the surface. Temperatures generally in the mid 60s in the Willamette Valley and SW Washington lowlands, closer to the low/mid 50s at the coast. With a moister airmass incoming, afternoon RH values on Saturday around 40 percent.

Sunday through Tuesday, a few weak disturbances pass through the area, with little/no accumulating rainfall expected for most of them.
Sunday sees the best chance; between 5am Sunday to 5am Monday, around 0.05-0.15 inches of rainfall possible north of Salem only. For areas further south, just dry conditions expected Sunday. The remainder of the upcoming week sees only a 20-50% chance of any accumulating rainfall. Winds in Hood River County remain somewhat elevated through Monday as onshore flow continues, with gusts up to 20 kts at times.
Everywhere else, fairly benign onshore flow under 10 kt gusts during this time. Daytime high temperatures in the begin in the lower 60s Sunday and Monday but gradually increase through the middle of the week toward the low 70s. No frost/freeze/fog concerns during this period. WPC Cluster guidance shows around a 60% chance of a slightly more impactful trough moving in next Thursday. There remains plenty of uncertainty in exact intensity and impacts with this late week system. /JLiu

AVIATION
Northwest flow aloft will continue today as a front continues to move east of the Cascades. A few areas of MVFR cigs lingering this morning will lift this afternoon, with predominately VFR conditions expected through this evening.
Northwest winds along the coast increase this afternoon with gusts up to 20-25 kt. Another weak front pushes inland later tonight into Sunday morning, with increasing clouds and chances for rain showers, mainly north of KSLE. CIGs likely to drop back into MVFR along the north Oregon coast after 06z Sunday, while inland locations are more likely to see a mix of VFR and MVFR conditions after 12Z Sunday, with about a 30-60% chance of MVFR CIGs , highest near KPDX and KTTD.

PDX AND APPROACHES...Predominately VFR conditions expected through tonight. Lingering shallow MVFR clouds near KTTD through 20z today. CIGs lower again after 12z Sunday with a chance of rain showers through Sunday morning. Northwest winds expected around 6-10 kt today. /DH

MARINE
Strong high pressure offshore will maintain northerly winds across the coastal waters through the weekend. A weak surface front is moving across the waters this morning. Northerly winds with gusts 20-25 kts will peak this morning with gusts up to 25-30 kt. Additionally, will build to 8 to 10 ft at 10 seconds this morning, continuing through the evening. Will maintain the Small Craft Advisory through Saturday evening. Winds decrease tonight with gusts below 20 kts as do waves to 5 to 8 ft at 10 to 11 seconds.

Another weak front moves across the waters on Sunday night.
Northerly winds increase slightly with occasional gusts 20-25 kts, though not widespread enough to consider a Small Craft Advisory at this time. Waves will also increase slightly to 8 to 10 feet at 10 seconds Sunday night and early Monday morning. By late Monday, the thermal trough strengthens over the southern Oregon coast, increasing the northerly pressure gradients again for early next week. Northerly winds off the central Oregon coast could increase to gusts of 20-25 kts. Seas are expected to persist around 6 to 7 ft at 10-13 seconds. -DH/HEC

PQR WATCHES/WARNINGS/ADVISORIES

OR...None.
WA...None.
PZ...Small Craft Advisory until 11 PM PDT this evening for PZZ251>253-271>273.