textproduct: Medford

KEY MESSAGES

* A change in the upper pattern will bring a steady decrease in daytime highs back to seasonal norms by midweek, with dry conditions continuing.

* Minor disturbances will keep breezy afternoon winds in the forecast, bringing elevated fire weather concerns.

* Signals for afternoon and evening thunderstorms are appearing on Friday and Saturday, but with little confidence in any specific outcome.

DISCUSSION

Warm temperatures continue as an upper ridge flattens, with a more zonal flow pattern expected for much of the week ahead. The most immediate impact will be decreased daytime highs as well as decreased overnight lows, which will make continued Heat Advisories unnecessary. By midweek, temperatures across the area look to be at seasonal norms. Slight warming is possible near the end of the week as the flow aloft splits, with a fairly flat ridge to the north and a cutoff low to the south. This westerly flow will stay dry through much of the week.

Model imagery does not include any significant disturbances in the upper flow, but weak passing disturbances will help to keep afternoon breezes slightly elevated. While this will have little impact on day-to-day conditions, these breezes when combined with ongoing dry conditions do represent elevated fire weather concerns. Please see the FIRE WEATHER discussion below for additional details.

Depending on the position and development of the cutoff low, monsoonal moisture could reach the area late into the week and into the weekend. This could support thunderstorm chances, but if and where those thunderstorms could happen is unclear. Model guidance is divided, with deterministic imagery showing precipitation over most counties (Excepting Douglas, Coos, and Curry) at some point in the afternoon and evening of next Friday and Saturday. Meteograms generally have a 20-40% chance for measurable precipitation for sites east of the Cascades (Klamath Falls, Lakeview, Alturas). Overall, data remains coarse and confidence in any one outcome is slight at this point. -TAD

AVIATION...09/06Z TAFs

Marine stratus with IFR/LIFR will continue to develop along the coast, north of Cape Blanco, overnight and persist through 17z Sunday. VFR will prevail inland across the remainder of the area, except areas of wildfire smoke and haze will cause local visibility reductions, especially in the immediate vicinity and just downwind of the fires. Klamath Falls is expected to experience visibility reductions (down to 2-4 mi) in smoke late tonight and Sunday morning. Otherwise, we expect breezy northwest winds in the afternoon/evening at most TAF sites on Sunday, generally 20-25 kt, except up to around 30 kt at North Bend.

MARINE...Updated 230 PM PDT Saturday, August 8, 2026

Gusty northerly winds continue over area waters this afternoon. North of Cape Blanco, these winds have built steep seas. To the south, gale gusts and very steep and hazardous seas are expected south of Port Orford and within 50 nm of shore, with steep seas in the outermost waters. Hazards for this forecast are in place through Monday evening, but guidance shows this general pattern continues through Wednesday evening. Winds start to ease on Thursday morning, but unsettled seas could persist for all waters through the weekend. -TAD

FIRE WEATHER...Updated 200 PM PDT Saturday, August 8, 2026

We'll stay in a pattern of very warm to hot, dry, and occasionally breezy conditions the rest of this weekend into mid next week. This pattern does include overnight breezy east to northeast winds at ridge tops of SW Oregon and NW California (most notably the Coast Range and Kalmiopsis Wilderness) along with poor to moderate RH recovery. A channeling of winds down the Chetco should result in drier/warmer conditions along the SW Oregon coast as well.

Upper level ridging shifting back toward the Four Corners will allow westerly zonal flow aloft to bring lower heights and modest cooling to inland areas into next week. Generally, the trend will be to lower daytime MaxTs down by a degree or two each day, and this should subsequently allow daytime MinRHs to be slightly higher. Even so, it'll be dry and unstable, so any fires on the landscape will still have the ability to grow significantly, especially during the peak burning periods during the afternoons/evenings. Overnight RH recoveries haven't been good the last couple of nights, generally only in the 20-35% range for some of the upper slopes and ridges. There should be slight nightly improvement in recoveries from NW to SE through the period. Things trend toward normal for mid next week, but temperatures still probably remain a few degrees above normal for most locations.

Models and ensemble guidance show a weakness or upper trough developing near or just off the California coast Wed/Thu next week and are continuing to show a southerly surge of monsoonal moisture northward into the area around Friday. Confidence is increasing that there will be a more organized risk of lightning/thunderstorms Friday into the weekend, but there is still plenty of uncertainty in the specifics. For now, we are carrying a broad area of 20-30% chances mainly across NorCal up across the Siskiyous to the Cascades and eastward. Given the very dry fuels, this could lead to an increase in lightning ignitions. We'll continue to monitor, so keep checking for updates. -Spilde

MFR WATCHES/WARNINGS/ADVISORIES

OR...CA...Heat Advisory until 11 PM PDT this evening for CAZ080>085.

PACIFIC COASTAL WATERS...Gale Warning until 8 PM PDT Monday for PZZ356-376.

Small Craft Advisory until 8 PM PDT Monday for PZZ350-356-370- 376.