textproduct: Medford

UPDATE

Aviation and marine discussions updated.

DISCUSSION

Key Points:

* Cooler/near normal everywhere with scattered showers east of the Cascades and in Northern California today * Coast/Coastal valleys: Overnight clouds/drizzle north of Cape Blanco, which could reach Roseburg * Ridging mid-week leading to warmer temperatures * Next low pressure system possible next weekend

Satellite shows that the coast is covered with marine stratus this morning, and it is reaching portions of the Umpqua Basin near Roseburg. The main precipitation chance today will be in Northern California and east of the Cascades as scattered showers will develop this afternoon. Temperatures will be slightly below normal this afternoon. There will be typical diurnal winds as well.

Tonight there will be similar conditions at the coast and into the Umpqua Basin, and lows will be in the 40s there. Elsewhere, more clearing will bring temperatures down into the upper 30s west and low 30s east. Everyone will see warmer temperatures tomorrow by about 3-7 degrees. However, there will be a 5-15% chance for a shower in the same areas as today.

After, ridging starts to build Wednesday. This will bring more locations west of the Cascades back into the 70s, and upper 60s are forecast east! This will equate to temperatures 10-15 degrees above normal.

Long term: Models then show the ridge breaking down by this weekend as an upper trough just off the West Coast tries to close off offshore. An increasing number of solutions show the low closing off to our SW, which would bring an increased risk for mainly afternoon and evening showers and thunderstorms Saturday, with the potential for active weather persisting Sunday into early next week. Much will depend on the eventual track of trough/low, however. Many members, particularly from the GEFS ensembles, maintain a weaker trough moving through, which would limit the overall extent/coverage of precipitation. We'll adjust the forecast as things come more into focus. -Spilde

AVIATION...27/18Z TAFs

Onshore flow has brought MVFR ceilings and terrain obscurations to the Oregon coast and the coastal mountains, and inland into the Umpqua Valley (including Roseburg). This will slowly clear late this morning into early this afternoon between 18- 21Z.

In northern California and over the East Side, showers will return this afternoon, but coverage should be more scattered. Local MVFR/IFR conditions with terrain obstructions are possible in any heavier showers. Otherwise and elsewhere, VFR will prevail through this evening.

Additional IFR/MVFR ceilings will return to the coast and Umpqua later this evening and overnight.

MARINE...Updated 800 AM PDT Monday, April 27, 2026

North winds continue this week. Initially winds and seas stay below advisory speeds today. Then, gusty north winds develop on Tuesday morning south of Cape Blanco. Steep sea return by Tuesday afternoon for the waters south of Cape Blanco. North winds will likely strengthen across the waters Wednesday into Thursday with steep to very steep seas possible. Gusty north winds and steep seas may linger Friday and Saturday.

MFR WATCHES/WARNINGS/ADVISORIES

OR...CA...None.

PACIFIC COASTAL WATERS...Small Craft Advisory from 11 AM Tuesday to 5 AM PDT Wednesday for PZZ350-356-370-376.