Marine Weather Net

Florence to Cape Blanco OR from 10 to 60 NM Marine Forecast


10 - 20


15 - 20


10 - 15


10 - 15

The Marine Weather Forecast In Detail:
PZZ370 Forecast Issued: 845 AM PDT Sat May 21 2022

Today...Nw Wind 10 To 20 Kt. Wind Waves 3 To 5 Ft. Swell N 4 To 5 Ft At 7 Seconds.
Tonight...N Wind 15 To 20 Kt. Wind Waves 3 To 4 Ft. Mixed Swell N 4 Ft At 7 Seconds And Sw 2 Ft At 16 Seconds.
Sun...N Wind 10 To 15 Kt. Wind Waves 3 Ft. Swell N 4 Ft At 7 Seconds And W 2 Ft At 12 Seconds... Shifting To The W 3 Ft At 11 Seconds And Sw 2 Ft At 16 Seconds In The Afternoon.
Sun Night...N Wind 10 To 15 Kt. Wind Waves 2 Ft Or Less. Mixed Swell W 3 Ft And Sw 2 Ft.
Mon...N Wind 10 Kt...Rising To 15 To 20 Kt In The Afternoon. Wind Waves 2 Ft Or Less. Mixed Swell W 3 To 4 Ft And Sw 2 Ft.
Mon Night...N Wind 20 Kt. Wind Waves 4 To 5 Ft. Mixed Swell W 3 Ft And Sw 2 Ft.
Tue...N Wind 15 To 20 Kt. Wind Waves 4 To 5 Ft. Mixed Swell W 2 To 3 Ft And Sw 2 Ft.
Wed...N Wind 15 Kt. Wind Waves 4 To 5 Ft. Mixed Swell W 2 To 3 Ft And Sw 1 To 2 Ft.
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Area Forecast Discussion
National Weather Service Medford OR
1056am PDT Sat May 21 2022

Updated the aviation and marine sections.

Updated 800am PDT Saturday 21 May 2022. Gusty north winds and wind driven seas will continue through early next week. Winds and seas will rise again this afternoon and evening as a thermal trough strengthens over the south coast. This thermal trough is not strong when compared to typical summer strength, yet it should keep conditions hazardous to small craft through the weekend into early next week. The thermal trough pattern will weaken a bit on Sunday, then likely strengthen again for Monday and Tuesday. Winds and seas will remain highest within the southern portion of the waters. -Smith/DW

/Issued 858am PDT Sat May 21 2022/

This morning saw another day of very unseasonably cold low temperatures. Widespread frost with isolated pockets of below freezing temperatures occured in the valleys in Jackson, Josephine and central and western Siskiyou counties. Below freezing temperatures were widespread east of the Cascades, but that is not unusual this time of year. With the upper low over northern Idaho weakening, the flow of the unusually cold air is shifting east, and temperatures will be warmer tonight, with continued warming into mid next week. -Sven

/Issued 259am PDT Sat May 21 2022/

As the broad upper level trough finally begins to shift to the east today, another shortwave will rotate through, producing a slight chance of showers along and east of the Cascade this afternoon and evening. While the chance for lightning with these showers isn't zero, the bulk of the energy and instability will be well to the northeast, and we would therefore be highly unlikely to see even a solitary strike within our forecast area.

With the departure of the trough, ridging will begin to build in overhead, producing a steady warming and drying trend through the weekend and early next week. Daytime temperatures are expected to rise well above normal by early to mid next week, more akin to late June and early July than May, and some inland West Side valleys could even approach 90 degrees by Wednesday. Meanwhile, a thermal trough will develop and hang out along the southern Oregon Coast and northwestern California, and this will likely result in some periods of easterly/offshore winds and potentially, a Chetco effect for Brookings and the surrounding areas. A weak front will attempt to make an approach to the Pacific Northwest Monday, which could disrupt the thermal trough a bit or perhaps introduce some additional clouds to the region, but it will meet a certain end before reaching the coast. In other words, no precipitation is expected through at least Wednesday, the hottest day of the week.

After our taste of summer, spring could make a triumphant but temporary return, with the deterministic GFS and ECMWF (European Centre for Medium-Range Weather Forecasts) both depicting the departure of the ridge and the arrival of a Pacific trough late Wednesday into Thursday. In a surprising and rare occurrence, the models have actually trended towards a slightly earlier arrival over the last few runs. As a result, the main area of difluence aloft now looks to arrive overnight rather than during the height of daytime heating, and therefore max instability, of the afternoon. This will significantly diminish thunderstorm chances, but showers are possible late Wednesday night into Thursday with the arrival of a surface front, followed by more widepsread shower chances Thursday into Friday as the upper level trough axis swings through. There is still plenty of room for changes in timing and track between now and when the system arrives, so more changes in the details of the forecast are likely, but generally speaking we do expect cooler, more seasonal temperatures and increased precipitation chances during the latter half of the week, through the end of the forecast term. -BPN

NOAA Medford OR Office: Watches - Warnings - Advisories
OR... CA...None.

Pacific Coastal Waters... Small Craft Advisory until 11pm PDT this evening for PZZ350-356-370-376. Hazardous Seas Warning until 11pm PDT this evening for PZZ356-376.