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Scorching weekend ahead for Southern Oregon and Northern California

Temperatures well above 100 degrees are expected to wallop the region this weekend, according to the National Weather Service.

The agency has issued an excessive heat watch from Saturday morning through Sunday evening because of the oven-like forecast.

High temperatures around 105 degrees in the Rogue, Applegate and Illinois valleys in Oregon and Klamath River valley in California are expected, a Weather Service bulletin said.

The high temperature Friday in Medford is expected to hit 99 degrees, meteorologist Brian Nieuwenhuis said. On Saturday, the temperature could hit 105. Sunday will see a 104 degrees, with 101 degrees expected Monday.

“That may change a degree here or there, but it should stick around in that general area,” Nieuwenhuis said.

Overnight low temperatures don’t sound very forgiving either, with mid 60s to low 70s Saturday and Sunday.

Several factors will contribute to the heat, including a general southwest airflow and a thermal trough hanging just off the coast that’s expected to push inland. A third factor is tropical storm Elida, located off the Baja California coast. The remnants of that system are expected to push warm air and moisture into the area, Nieuwenhuis said.

“You’re looking at tropical air, tropical moisture,” Nieuwenhuis said. “That’s helping it.”

The tropical moisture could result in some thunderstorms. The areas that could be affected is still being pinned down.

“It’s going to depend on where the moisture really starts flowing in,” Nieuwenhuis said. “The moisture is the definitive factor there.”

Forecasters reminded residents to drink plenty of fluids and stay out of the sun as much as possible, due to the potential for heat-related illnesses.

Reach web editor Ryan Pfeil at 541-776-4468 or rpfeil@rosebudmedia.com. Follow him on Twitter @RyanPfeil.