Big One 9-7-17

An air-quality alert for the mid-valley remains in effect until noon Friday, and forecasters continue to warn about weather conditions — lightning in particular — that are conducive to extreme fire behavior.

Otherwise, high temperatures throughout the mid-valley are expected to be in the lower 80s Thursday, with lows around 60 Thursday night. There's a chance of rain and thunderstorms.

The region continues to labor under a smoke air quality alert. Wildfires burning in the region have resulted in unhealthy air quality levels, which will continue at times through either late Thursday or early Friday. However, conditions as a whole should gradually improve across most of the region through Friday.

Pollutants in smoke can cause burning eyes, runny noses and can aggravate heart and lung diseases, and other serious health problems. Limit outdoor activities and keep children indoors if it is smoky. People with heart and lung conditions should follow medical advice.

More information about air quality can be found at these websites: www.oregon.gov/DEQ and www.lrapa.org

In the meantime, forecasters at the National Weather Service office in Portland, worried about possible lightning in the area, have extended their red flag warning to 11 p.m. Thursday.

Forecasters said their attention on Thursday will be focused north of a line extending between the Three Sisters and Tillamook. Frequent lightning and critically dry fuels may result in numerous fire starts, they said.

A red flag warning is issued when critical fire weather conditions either are occurring or are expected to occur shortly. Such weather can contribute to extreme fire behavior.

Here are your updated local forecasts:

Albany

Thursday: A 30 percent chance of showers and thunderstorms, mainly before 11 a.m. Mostly cloudy, with a high near 82. East wind 5 to 7 mph becoming west in the morning.

Thursday night: A 40 percent chance of showers. Mostly cloudy, with a low around 60. Northwest wind 5 to 9 mph becoming light and variable in the evening. New precipitation amounts of less than a tenth of an inch possible.

Friday: A 20 percent chance of showers. Cloudy, then gradually becoming mostly sunny, with a high near 78. Calm wind becoming west northwest around 5 mph in the afternoon.

Corvallis

Thursday: A 30 percent chance of showers and thunderstorms, mainly before 11 a.m. Mostly cloudy, with a high near 81. West northwest wind 3 to 8 mph.

Thursday night: A 40 percent chance of showers. Mostly cloudy, with a low around 59. West northwest wind 6 to 11 mph becoming light west southwest in the evening. New precipitation amounts of less than a tenth of an inch possible.

Friday: A 20 percent chance of showers. Cloudy, then gradually becoming mostly sunny, with a high near 78. Calm wind becoming west northwest around 5 mph in the afternoon.

Lebanon

Thursday: A 30 percent chance of showers and thunderstorms, mainly before 11 a.m. Mostly cloudy, with a high near 82. Southeast wind around 6 mph becoming north northwest in the morning.

Thursday night: A 50 percent chance of showers. Mostly cloudy, with a low around 59. North northwest wind 5 to 9 mph becoming light and variable in the evening. New precipitation amounts of less than a tenth of an inch possible.

Friday: A 20 percent chance of showers. Cloudy, then gradually becoming mostly sunny, with a high near 78. Light and variable wind.

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