Marine Weather and Tide Forecast for Bunker Hill, OR

DISCUSSION
The axis of an upper level ridge approaches the area today, bringing a 5 to 10 degree increase in daytime highs across the area. Coastal areas look to be in the high 70s to low 80s, while most west side valleys are forecast to be in the 100 to 105 range and parts of the Klamath River Valley could exceed 110 degrees. For those inland valleys, a Heat Advisory is in place starting this afternoon to highlight the threat that these temperatures pose to anyone without adequate cooling or hydration. East of the Cascades, daytime highs in the low to mid 90s are expected today. While east side temperatures fall short of Advisory level, they are still about 5 degrees above normal summer warmth.

With the ridge axis slowly moving from west to east, temperatures west of the Cascades may gain another degree or two on Wednesday while east side daytime highs look to increase by up to 5 degrees.
These temperatures continue into Thursday, making these two days the warmest of the forecast period for most areas. Tuesday's Heat Advisory expands to cover most of the CWA on Wednesday afternoon (western Coos and Curry counties, eastern Douglas County and northern Klamath counties, and the Mount Shasta region south of Weed fell just short of Advisory conditions). Even for these "less hot" areas, extra caution is worthwhile for anyone participating in recreational activities.

Wildfire smoke looks to continue accumulating overnight through the middle of the week, with afternoon breezes bringing some relief.
Lake and Klamath counties are expected to see the highest concentrations of smoke. With atmospheric conditions being fairly stable, this pattern of overnight accumulation and afternoon clearing should be somewhat reliable through Thursday. While peak smoke and speak heating do not overlap, this also means that air quality may be poorest while people do things in the morning to avoid afternoon heat. For anyone sensitive to unseasonable warmth and poor air quality, this midweek period may be difficult to navigate.

The ridge axis looks to be just east of the area on Friday, which will allow for the first degrees of cooling. A slow and steady cooling trend may continue over the weekend and into early next week, as there's some agreement of a zonal/slightly southwest flow pattern taking control behind the ridge. While this looks to bring cooler temperatures, dry air aloft is keeping abundant precipitation out of the long-term forecast. These flow patterns also offer little support for thunderstorm development after the heat wave. -TAD



AVIATION
04/12Z TAFs...VFR levels continue across northern Oregon and far northern California through the next 24 hours. Breezy afternoon and evening winds will remain strongest at the coast.
Wildfire smoke may bring periods of VFR visibilities to area terminals, especially in morning hours before afternoon breezes can bring some clearing.

MARINE
Updated 200 AM PDT Tuesday, August 4, 2026...Northerly winds have somewhat eased, taking gale gusts out of the forecast.
Very steep and hazardous seas are present in waters south of Cape Blanco, with steep seas in waters to the north. North winds and seas should ease further Wednesday into Thursday, although steep seas are likely to remain hazardous to small craft.

FIRE WEATHER
Updated 200 AM PDT Tuesday, August 4, 2026...
Ridging aloft and a thermal trough at the surface will produce persistent near-critical to critical fire weather concerns through the week. Temperatures will remain hot through the week, peaking at about 10 to 15 degrees above normal Wednesday/Thursday, before diminishing closer to normal values into the weekend.

Poor RH recoveries are being observed across all of SW Oregon and northern California upper slopes/ridges early this morning. Some guidance is showing RH only recovering into the low 20s (upper teens?!) today through Thursday, while daytime minimum humidities could easily drop into the single digit percentages. Fortunately, winds will diminish some from the previous day. With these hot, dry, and windy conditions in the valleys during the day Monday and Tuesday,and with the poor recoveries and east winds overnight over the mountains, a Red Flag has been issued for the Illinois and Rogue valleys, as well as the Siskiyous and southern Oregon Cascades, beginning this afternoon and continuing into Tuesday evening.

Although poor overnight recoveries and breezy east winds return again for the mountains Tuesday night, conditions should improve just enough (mainly slightly weaker winds) to preclude continuing the Red Flag through the overnight hours. Guidance shows only minimal improvement, if any, in wind and humidity during the day Wednesday, in addition to much more instability as the thermal trough pushes inland. With Wednesday being the hottest day, and with continued dry, windy, and unstable conditions, critical fire weather will expand into western Siskiyou County and into Douglas County.
Another Red Flag warning has been issued for all of these areas for Wedensday afternoon/evening.

We may see some slight cooling and slight improvement to overall winds and humidities Thursday and/or Friday, but it may not be enough to bring sections of the area out of Red Flag concerns. This will be further assessed in the coming days.

Outside of the Red Flag Warning areas, conditions will still be hot, dry, windy, and unstable, with poor ridgetop and east side recoveries, and periods of near-critical conditions.



MFR WATCHES/WARNINGS/ADVISORIES
OR...Red Flag Warning until 9 PM PDT this evening for ORZ616-617- 620>623.

Heat Advisory from 11 AM this morning to 11 PM PDT Thursday for ORZ023-024-026-028>031.

CA...Red Flag Warning until 9 PM PDT this evening for CAZ280-282.

Heat Advisory from 11 AM this morning to 11 PM PDT Thursday for CAZ080-081-083>085.

PACIFIC COASTAL WATERS...Hazardous Seas Warning until 9 PM PDT this evening for PZZ356-376.

Small Craft Advisory from 9 PM this evening to 5 PM PDT Wednesday for PZZ356-376.

Small Craft Advisory until 5 PM PDT Wednesday for PZZ350-370.