textproduct: Medford

DISCUSSION

Satellite imagery this afternoon shows an extensive layer of marine clouds lying along and just offshore. This area of clouds is likely to push into the coastal valleys this evening and tonight, much like yesterday into this morning. Also, Some higher level clouds are starting to stream into the area, and these are about the only visual sign we have for the passage of a weak shortwave aloft. Some small cumulus fields have started developing this afternoon over portions of Siskiyou County and the Oregon Cascades, and with the help of the shortwave, a few of these could develop into showers or even an isolated thunderstorm, but confidence is low on the latter.

Another shortwave passes through the area tomorrow, and with somewhat increased moisture, the slight chance for afternoon showers and isolated thunderstorms continues for the same areas, but also over much of the East Side in addition.

Meanwhile, temperatures remain warm, although not necessarily as hot as previous forecast. Temperatures are now trending just slightly lower, but just lower enough to bring us out of concerns for heat injuries. So, the heat advisory that was in effect for today has been canceled.

In a somewhat strange scenario for this time of year, a cold front will arrive late in the week, with widespread chances for showers and potentially some wetting rains (especially for areas farther north) and much cooler temperatures. In general, the showers and below normal temperatures will have things feeling more spring-ish, or like May or early June. Most areas west of the Cascades will receive light rain or drizzle, but areas along the coast, in the coastal ranges, and into the Umpqua Basin and the Cascades crest could see a quarter to a half inch of rain late Thursday night through Saturday. This front may also bring gusty afternoon and evening winds east of the Cascades and over terrain in Siskiyou County Thursday, Friday, and Saturday afternoons.

Long-term forecast trends are leaning towards continued relatively cool weather and some additional shower chances, with upper level cyclonic flow remaining over the Pacific Northwest with the potential for additional shortwaves.

AVIATION...24/00Z TAFs

The marine layer will remain well entrenched along the coast and at coastal sites today, maintaining IFR/LIFR conditions. This will persist overnight, with gradual clearing to VFR in the late morning 17-20z.

Inland areas will remain VFR through the TAF period with the typical increase in afternoon breezes. Cumulus buildups are also expected this afternoon over the higher terrain, with isolated thunderstorms possible south of the OR/CA border near the Mt Shasta/Medicine Lakes region.

MARINE...Updated 1200 PM PDT Tuesday, June 23, 2026

Breezy north winds and steep seas will continue south of Cape Blanco while conditions to the north improve through tonight. Winds increase again briefly Wednesday into Thursday, again mainly south of Cape Blanco, then overall conditions improve by Friday. Then a cold front is likely to bring moderate south winds becoming northwest, light rain and a modest increase in fresh west-northwest swell Friday into Saturday.

MFR WATCHES/WARNINGS/ADVISORIES

OR...CA...None.

PACIFIC COASTAL WATERS...Small Craft Advisory until 8 PM PDT Thursday for PZZ356-370-376.