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Rogue Valley fog forecast to stick around

The recent streak of dingy, foggy weather is expected to continue this week, according to the National Weather Service.

Forecasters called for a brief reprieve Monday because of a wet cold front that pushed into the area, bringing some light rain with it. Up to a quarter inch was forecast along the Oregon Coast, and up to one-tenth of an inch elsewhere, including the Rogue Valley.

But the high-pressure system that’s been fueling a thick layer of freezing, low-lying fog is expected to resume and endure until at least the weekend. A weak front is expected to move into the region mid-week, but it won’t have much of an impact.

“It really just washes out before it even gets here,” said National Weather Service meteorologist Misty Firmin. “Otherwise we’re just going to be stuck in the fog for much of the week.”

Since Thanksgiving, morning and nighttime visibility in parts of the Rogue Valley has decreased to about a quarter mile or less, National Weather Service meteorologist Shad Keene said. The fog has only had a mild impact on air quality, with conditions typically staying in the “good” range during the daytime and dipping to “moderate” levels during the afternoon and overnight, according to Oregon Department of Environmental Quality data.

Daytime high temperatures for Medford are forecast to hit the low- to mid-40s the rest of the week, with nighttime lows dropping into the low 30s. Details weren’t immediately available, but weather officials pointed to greater chances for more active weather patterns the second week of December.

“The bottom line is people need to expect more mornings of fog and freezing fog,” Keene said. “This pattern is stagnant, and there are no big indications of a return to active weather until [the] ninth or 10th of December.”

Reach Mail Tribune web editor Ryan Pfeil at 541-776-4468 or rpfeil@rosebudmedia.com.