Marine Weather and Tide Forecast for Etna, CA

FXUS66 KMFR 141904 AFDMFR

Area Forecast Discussion National Weather Service Medford OR 1204 PM PDT Tue Apr 14 2026

DISCUSSION
A shortwave ridge passing over northern California and southern Oregon will produce calm, mostly clear weather for the rest of today. Daytime highs will warm slightly from Monday's temperatures, but clouds will steadily increase across the area as the next system approaches.

As this cold front approaches, some coastal showers will begin to move into the area this evening, which we can already see in Radar imagery offshore this afternoon. More widespread rainfall is expected on Wednesday. Coastal cities look to see 1 to 1.5 inches of rainfall, while coastal ranges could see around 2 inches. Rainfall in the Umpqua Valley is forecast to be between 0.75 and 1 inch, with other valleys and basins seeing lower amounts through Wednesday.

With snow levels expected to hover at 4500-5500 feet from the front's arrival through Wednesday morning, winter impacts look to be limited to the Cascades. A Winter Weather Advisory is in place for areas near and north of Crater Lake and at elevations above 5000 feet from Wednesday morning through Thursday morning, given that snowfall in this area is expected to make travel hazardous. Snowfall amounts of 12 to 16 inches are forecast over the Cascades on Wednesday. Current SPC guidance shows around a 90 percent chance for snowfall rates of 1 inch per hour Wednesday morning into early in the afternoon, and 40 to 50 percent chance for a brief period of 2 inches per hour late in the morning.

Also, gusty winds are expected over elevated terrain and the usual exposed areas on Wednesday, especially east of the Cascades.
With mid-level model winds approaching 55 kts, gusts along Winter Rim/Summer Lake and the Warner Mountains could reach up to 55 mph in that late Wednesday morning-early afternoon timeframe. Gusts of 30-40 mph are expected to be more widespread across east side areas.

Activity across the area eases on Wednesday evening, but a cold air mass looks to bring impactful overnight low temperatures for west side valleys. The Rogue, Applegate, Illinois, and western Klamath County valleys are all forecast to see lows from the mid 20s to low 30s on these nights. These temperatures would bring chances of frost or freezing conditions. East of the Cascades, overnight lows look to be in the mid teens to low 20s.

Chilly nights aside, Thursday looks to be a quieter day. While snow levels drop to 1500-2000 feet in the morning, declining activity will minimize the chance of impactful winter conditions at lower elevations. Another shortwave ridge looks to bring warmer temperatures and dry conditions on Friday and Saturday. Long-term deterministic imagery is showing more agreement of a low pressure system approaching the area from the northwest late this weekend into early next week, bringing periods of southwest or southerly flow. While details are still coarse, the tight pressure gradients aloft in imagery tend to indicate stronger winds, and southerly flow patterns tend to deliver moderate to heavy precipitation to the Mount Shasta area and coastal terrain. Details remain coarse for this timeframe, so stay tuned for additional details on continuing active weather.
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