textproduct: Medford

Updated AVIATION Discussion

AVIATION...05/00Z TAFs

Widespread LIFR in low clouds and fog persists along the coast from Cape Blanco northward and locally for areas south of Cape Blanco. VFR conditions will prevail through the TAF period for inland locations with mid-high level clouds continuing to stream overhead from the south this afternoon. Expect the marine layer to return this evening and overnight along the coast, bringing the return of LIFR ceilings and visibilities after 03z. Some patchy LIFR could develop in portions of the Umpqua Basin late tonight/early Monday morning, but confidence low in the extent.

PREV DISCUSSION

/Issued 251 PM PDT Sun Oct 4 2026/

KEY MESSAGES...

* Warm temperatures and dry conditions are expected to continue through Thursday.

* While Advisory conditions for heat and fire weather are not expected, taking additional care on either subject given the ongoing warm and dry conditions is encouraged.

* A cold front looks to bring a quick cooldown towards the end of the week and into the weekend, but substantial precipitation is not currently expected.

DISCUSSION...An upper ridge around high pressure in the southwestern United States remains in control of the forecast through much of the week ahead. Little change is expected through Thursday. Coastal cities look to stay in the mid 70s to low 80s. East side areas and the Umpqua Valley are forecast to be in the mid to high 80s. Most other west side valleys will stay in the low to mid 90s, with parts of the Klamath River Valley reaching 100 degrees. These temperatures remain at 10 to 20 degrees above normal for this time of year.

While these temperatures are concerning in their magnitude, Advisory products do not look to be necessary. Of course, individuals should be aware of how they tolerate warm weather and stake steps to stay safe during peak heating. But with the warmest temperatures lasting a few hours at most and ample time for overnight cooling, sustained heat stress is not expected. But to repeat, individuals who are very sensitive to these daytime temperatures can be affected even if those temperatures do not last long.

Fire weather is also worth mentioning. Fortunately, there's little threat of elevated winds necessary for Red Flag conditions. With that said, dry conditions through the day and night are doing little to ease the amount of dry grasses and other fuels. Extra care while performing activities that can lead to fire starts (campfires, chains dragging along the road, yard work to name a few) is encouraged.

A pattern change looks to drop temperatures quickly on Friday and into the weekend as a cold front passes over the area. Daytime highs are forecast to drop by 5-10 degrees on Friday, then another 10-20 degrees on Saturday. Broadly speaking, this puts east side areas in the low to mid 60s with west side areas in the high 60s to low 70s. Rainfall is possible but chances are trending down. While gusty westerly winds may develop over parts of the east side, current gusts look short of any hazardous levels and increasing humidities will limit fire weather concerns. Cooler temperatures look to continue into at least Sunday, with some uncertainty beyond. Looking at ensembles, the outside chance of moisture from Hurricane Rachel reaching the area no longer appears in any member panels. Current imagery shows that moisture reaching the cold front once its east of the area. That does not rule out the chance, but overall that outcome is looking even less likely than it did previously. -TAD

MARINE...Updated 230 PM PDT Sunday, October 4, 2026...A persisting thermal trough will bring gusty northerly winds and steep seas for much of the week ahead. Winds have come down slightly, limiting steep seas to outer waters south of Reedsport for the rest of the day. Winds look to increase late tonight into early Monday morning, bringing steep seas to all area waters.

Fluctuations in the thermal trough's strength and position may bring changes to where steep seas are through the week, but there is an agreement in guidance that some amount of steep seas will be present through at least Thursday. A pattern change may bring active weather towards the end of the week, with some guidance also showing incoming long period westerly swell arriving at some point over the weekend. Confidence is not high enough in theses outcomes to predict the sea state, but as this is the first signs of possibly meaningful long-period swell for the season, acknowledging it is worthwhile.

MFR WATCHES/WARNINGS/ADVISORIES

OR...CA...None.

PACIFIC COASTAL WATERS...Small Craft Advisory from 11 PM this evening to 11 PM PDT Tuesday for PZZ350-356.

Small Craft Advisory until 11 PM PDT Tuesday for PZZ370-376.