textproduct: Portland

This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.

SYNOPSIS

Dry and seasonable conditions continue through tomorrow with highs in the 50s along the coast and 60s inland. Rain chances return late Sunday into Monday as the pattern becomes more active. A stronger system is expected late Tuesday into Wednesday, bringing rain and the potential for impactful Cascade snow through Thursday.

AVIATION

Zonal westerly flow aloft and dry conditions will continue to maintain VFR conditions through the TAF period. Gusty winds through the Columbia River Gorge into KTTD with gusts around 20-25 kt except above 2000 ft where gusts up to 40 kt are possible. While most other terminals will likely stay northerly to northwesterly under 10 kt, coastal terminals will see increased winds of around 10-15 kt with gusts up to 20-25 kt through the evening. 20% chance of gusts up to 30 kt from Lincoln City southward.

KPDX AND APPROACHES...No concerns. Northerly winds through the periods with VFR CIGs/VIS. Easterly winds around 2000 ft may gust up to 30 kt, but given the lack of vertical profile, have omitted LLWS. -27

MARINE

High pressure over the area with a more typical summer like pattern of northerly winds and northwesterly seas. Overall will see low end small craft winds over all of the outer waters with the inner waters south of Tillamook beginning to increase. These winds will persist through the evening before easing by early Saturday morning. Peak wind speeds appear to be between 5 PM to midnight (Saturday). Seas will see minimal change, rising to 6-9 ft at 11 seconds with isolated seas to 10 ft when the winds and seas align. The next system of concern arises on Sunday night into Monday when we start to see a pattern shift as a weak front nears the area. Winds again begin to increase on Monday leading to another period of low end small craft winds.

The day to keep on your radar is Tuesday night into Wednesday. We are seeing a robust frontal system moving into the area with the potential for impactful winds and seas. The hints of a weak coastal jet are beginning to form. Some models show around a 10-20% chance of Gale Force wind gusts south of Tillamook. Seas too would build into the "teens" given the wind and wave coupling. Confidence remains low at this time. -27

PQR WATCHES/WARNINGS/ADVISORIES

OR...None.

WA...None.

PZ...Small Craft Advisory until 2 AM PDT Saturday for PZZ252-253.

Small Craft Advisory until midnight PDT tonight for PZZ271.

Small Craft Advisory until 5 AM PDT Saturday for PZZ272-273.


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