Marine Weather and Tide Forecast for Etna, CA

AVIATION
30/18Z TAFs...IFR ceilings and lower visibilities are present at North Bend under a layer of marine stratus. This layer looks to clear out this afternoon as northerly winds pick up. Marine stratus and MVFR to IFR levels look to return to coastal areas this evening or tonight. This marine layer may also reach into the Umpqua Valley, with a MVFR ceiling in the forecast to indicate possible timing. These lower flight levels may stick around through the rest of the TAF period.

Other inland areas are expected to stay at VFR levels with only diurnal breezes and high clouds. -TAD

PREV DISCUSSION
/Issued 259 AM PDT Thu Apr 30 2026/

KEY MESSAGES...
-Warm and dry today into Friday.
-Remaining warm with increasing humidity Friday through Sunday.
-Shower/t-storm chances increase late Friday, persist through the weekend and into early next week, focused on Sunday/Monday.
-Briefly cooler Monday.
-High pressure rebuilds Tuesday/Wednesday with a warm-up, though showers could linger from Cascades east on Tuesday.

DISCUSSION...An upper ridge will bring dry weather today. Coastal areas will endure some morning stratus, but these clouds should break up for at least a few hours this afternoon (highs in the upper 50s beaches to mid or upper 60s just inland). The rest of the area will be sunny with high cirrus at times and perhaps a few cumulus near the mountains during the afternoon. High temperatures will be about 6-12F above normal (upper 60s/low 70s east of the Cascades and 75-85F for west side valleys).

The ridge will move east of the Cascades tonight into Friday. A bit deeper of a marine push will bring marine stratus back to coastal areas tonight and perhaps also into portions of the Umpqua Basin. Not sure if it reaches quite to Roseburg, but there is a decent shot at some lower clouds around the airport Friday morning. Clear skies persist elsewhere.

Friday afternoon, with the ridge breaking to the east, an upper trough will close off just off the PacNW coast and move southward (inside 130W, but just offshore). Increasing southerly flow in advance of this disturbance will bring higher moisture (PWs of 0.5-0.8") and instability (CAPE 200-500 J/KG) over the area during the afternoon/evening. Hi-res guidance shows decent some cumulus building during the late afternoon over the mountains, especially from western Siskiyou County, up across Jackson County and into the Cascades. These areas stand a decent chance (20-40%)
of showers along with a slight chance (15-20%) of thunderstorms.
While convective parameters aren't bullish on severe potential (bulk shear only in the 20-30kt range), any cells that do form could produce gusty winds, CG lightning and small hail. Some activity (mostly just showers) could linger near and west of the Cascades into the night since the core of the closed low will be just off the Oregon coast at that time. Showers and storms will be in the same general areas Saturday, but with the flow becoming more SSE as the closed low heads down the coast, activity could become more widespread and include east side areas during the afternoon/evening. The low settles southward to a position about ~300 miles WSW of San Francisco Saturday night into Sunday morning and showers should wind down over our area with the loss of instability.

Sunday into Monday, much will depend of the ultimate track of the low. Latest guidance has the low just a bit farther south than it did yesterday, which would keep the focus for showers and storms as bit farther south as well (more directed into NorCal than southern Oregon). Even so, there should be enough moisture, instability and forcing for more widespread showers and embedded thunderstorms Sunday afternoon/evening. By Monday, we'll be decidedly on the northern periphery of the low with upper ridging to the north and mid-level flow around the low from the ENE. Most areas will be cooler, but especially NorCal where clouds/showers will be most persistent. There's still a chance of thunderstorms, but best chance is east of the Cascades. Rain amounts with this entire system will likely vary quite a bit, but have come down compared to yesterday due to the southward shift of the low. Best guess is 0.25-0.50 of an inch (lesser for areas N&W) with up to an inch in areas where showers are most persistent or manage to get beneath a thunderstorm core for a while.

Tuesday into Wednesday, the upper ridge to the north will win out as the closed low settles into the Great Basin and Desert Southwest. This will allow things to warm up again, though a chance of showers continues for areas mostly to the south and east of the Cascades. -Spilde

MARINE
Updated 250 AM PDT Thursday, April 30, 2026
A thermal trough pattern will bring gusty north winds through Saturday. The strongest winds and very steep seas are expected south of Ophir today and again on Friday. Seas will be steep elsewhere.
Winds start to ease on Saturday but unsettled seas may continue.

MFR WATCHES/WARNINGS/ADVISORIES
OR
CA
None.

PACIFIC COASTAL WATERS...Small Craft Advisory until 11 PM PDT Saturday for PZZ350-356-370-376.

Hazardous Seas Warning from 2 PM this afternoon to 11 AM PDT Friday for PZZ356-376.