textproduct: Medford

KEY MESSAGES

* Frost and freezing temperatures will develop this morning and again Tuesday morning.

* High pressure builds overhead for the rest of the week with highs peaking late week about 10 to 15 degrees above normal.

* A mostly dry cold front arrives with cooler temperatures this weekend. * Precipitation chances are looking more likely early next week.

DISCUSSION

Today will be the last cooler than normal day, then temperatures will warm through the rest of the week as high pressure builds in overhead.

Another round of near-freezing temperatures is expected in the valleys west of the Cascades tonight. The Shasta and Scott valleys in Siskiyou County dropped well below breezing, and therefore will have no more frost/freeze headlines this season. In oregon, some light winds early this morning kept temperatures from dropping as low as expected for some locations, such as at the Medford airport, while locations with calm winds did drop as forecast. As a result, frost and freezing conditions were more spotty and coverage was far from uniform. With temperatures expected to be a few degrees warmer tonight, and with those spotty frost/freeze conditions last night, have opted to issue frost advisories for the inland valleys west of the Cascades to ensure all areas are covered, just in case.

It should be noted that the average date of the first freeze for the Illinois, Applegate, and Rogue valleys occurs during the second week of October. As such, after this round of cold temperatures, these areas may not need additional headlines. The Umpqua Basin, however, typically does not reach the first freeze until early November.

The upper trough that has brought us these cold temperatures will gradually edge southward into NW Nevada late tonight and eventually into Utah by Tuesday. Upper ridging then develops and amplifies over the area during the rest of this week, resulting in a warming trend that will culminate Thursday and Friday with temperatures around 10 to 15 degrees above normal for mid-October.

Temperatures will see another cooldown this weekend with the arrival of a mostly dry cold front. Another front, associated with a much deeper and stronger upper-level trough, then arrives early next week with a much higher chance of widespread precipitation. And with the cooler, more seasonable temperatures in place by that time, there is a chance for some snow in the higher mountains.

AVIATION...12/18Z TAFs

VFR levels look to continue across northern California and southern Oregon through much of the day. Marine stratus looks to bring IFR/LIFR levels to parts of the coast this evening, with that layer possibly lasting through most of the TAF period before clearing on Tuesday morning. A brief period of IFR/LIFR levels may also develop at the Roseburg terminal early Tuesday morning as well, but would likely clear out within a few hours. -TAD

MARINE...Updated 1230 PM PDT Sunday, October 12, 2026

Gusty north winds and steep to very steep wind-driven seas will continue across the area into Tuesday. Winds will be strongest and seas will be highest south of Port Orford. Furthermore, long period west- northwest swell will continue into this afternoon. Improved conditions are expected Tuesday night, but only for a brief period before the thermal trough reforms and gusty north winds return to areas south of Port Orford on Wednesday.

MFR WATCHES/WARNINGS/ADVISORIES

OR...Beach Hazards Statement until 2 PM PDT this afternoon for ORZ021- 022.

Frost Advisory from 2 AM to 9 AM PDT Tuesday for ORZ023-024-026.

CA...None.

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

Hazardous Seas Warning until 11 PM PDT this evening for PZZ356- 376.