textproduct: Medford

DISCUSSION

After a warm start to the week, a passing front today will bring more seasonal temperatures to far northern California and southern Oregon. A few showers are accompanying this front today, but very little of the precipitation is reaching the ground, and what has reached the ground has done little more than speckle the pavement. Some gusty winds are also moving into the area as the front passes, but even the highest speeds are safely short of Advisory levels. Low amounts of instability will be present over northeastern Lake County this afternoon, supporting around a 5-10% chances for isolated thunderstorms.

Colder air will settle into the area tonight behind the front, with overnight lows dropping to around 5 degrees below normal. east of the Cascades, frost is expected, and with the growing season beginning there, a Frost Advisory has been issued. See PDXNPWMFR for more details.

The upper level pattern switches more towards zonal flow behind the front will keep seasonal temperatures in the forecast through the rest of the week, until the next trough arrives this weekend. While the center of low passes to the north of the area, the trough axis will gradually pass over the area Friday into Saturday, bringing another round of afternoon gusty winds, and a slight chance for light showers over Coos and Douglas counties on Saturday. Areas in Modoc, Lake, and Klamath counties will be under frost/freeze concerns again Saturday night, with overnight lows potentially dropping below freezing in northern Klamath and Lake counties.

Behind the trough, seasonal warmth returns under shortwave ridging early next week, with the potential for another upper level trough and cold front arriving with light precipitation chances by midweek.

AVIATION...03/18Z TAFs

VFR is present inland, while areas of IFR/MVFR remain in place along the coast. A weak front moves inland this afternoon. This may produce some light showers in Coos and Douglas counties, including North Bend and Roseburg, but mainly virga. The passing front will bring gusty west to northwest winds to areas east of the Cascades this afternoon and evening. Rain showers and clouds dissipate inland from late afternoon into the early evening, but lingering cloud cover looks to keep MVFR and local IFR in place along the coast.

A reinforcing push of marine stratus overnight is expected from Cape Blanco northward, and into the Umpqua Valley (including Roseburg) will continue the mix of IFR/MVFR until around 17Z on Thursday morning.

MARINE...Updated 1230 PM PDT Wednesday, June 3, 2026

A weak front is bringing light showers over the waters, but with no significant impacts expected. Relatively calm wind and sea conditions are expected into this evening.

Behind the front, northerly winds increase across area waters and are expected to build steep seas south of Cape Blanco tonight into Friday morning. These winds ease as another system passes to the north on Saturday. But, increasing north winds and steep wind driven seas are forecast to return late Saturday into Sunday, and again early Monday into Tuesday.

MFR WATCHES/WARNINGS/ADVISORIES

OR...Frost Advisory from 3 AM to 8 AM PDT Thursday for ORZ029>031.

CA...Frost Advisory from 3 AM to 8 AM PDT Thursday for CAZ083>085.

PACIFIC COASTAL WATERS...Small Craft Advisory from 8 PM this evening to 8 AM PDT Friday for PZZ356-376.