Here is my new weekly weather quiz question. What is a “Temperature Inversion?” Please remember to post your answer as a comment by clicking on “no comments /comments” in the upper right hand portion of this page under the caption, then add your comment. The first person to post the correct answer will win a week of free personalized weather forecasts tailored to your needs. The answer has to be a comment to win. An email answer will not count. Good luck.

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Advisories:

• A HIGH SURF WARNING IS IN EFFECT FROM 10 PM FRIDAY UNTIL 10 AM SUNDAY FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
• A HIGH WIND WATCH IS IN EFFECT FROM FRIDAY EVENING THROUGH SATURDAY AFTERNOON FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
• A HIGH WIND WATCH IS IN EFFECT FROM LATE FRIDAY NIGHT THROUGH SATURDAY EVENING FOR NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL, AND EASTERN LAKE COUNTY,

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An upper level high pressure ridge ( Shaded “arch” shape) is going to keep sending waves of moisture at us. A frontal system is going to spread more rain over the Pacific Northwest. More storms will push in with the strongest frontal system coming through Oregon on Saturday increasing our chances for rain even more.

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Air Quality Index:

Eugene-Springfield: The Pollution Index is 20 in the Good category measuring Particulate Matter at Springfield City Hall. Data courtesy of Lane Regional Air Protection Agency (LRAPA)

Oakridge: The Pollution Index is 44 in the Good category measuring Particulate Matter at Willamette Activity Center, Oakridge.  Data courtesy of Lane Regional Air Protection Agency (LRAPA)

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Home Wood Heating Advisory:

Eugene/Springfield: (GREEN) Burning Allowed.

Oakridge: (YELLOW) Burning Cautioned Against.

The use of Pellet stoves is always allowed.

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Forecast for the South Oregon Coast including Coos Bay and North Bend:

• Cloudy with a good (50%) chance of AM showers, rain this afternoon (0.10 in. of rain possible) and breezy (Wind: SW 10-15 mph shifting S 15-25 mph late this afternoon), evening rain likely (60%), mostly cloudy with a (40%) chance of rain tonight (0.10 in. of rain possible) and breezy (Wind: SW 15-25 mph decreasing to SW 10-15 mph late at night),
• Mostly cloudy with a (40%) chance of showers Friday afternoon (0.10 in. of rain possible) and evening and breezy (Wind: S 10-15 mph increasing to S 15-25 mph by late AM), rain late Friday night (0.50 in. of rain possible) and windy (Wind: S 15-25 mph increasing to S 25-35 mph late at night at the coast while S 15-25 mph gusts to 45 mph inland late at night).
• AM rain, rain with isolated thunderstorms and very windy Saturday afternoon, showers and isolated thunderstorms in the evening, then showers likely (60%) at night.
• highs 50-53 cooling to 50 Saturday lows 45-49 cooling to 43 Saturday night.
• Mostly cloudy with a good (50%) chance of showers Sunday, a slight (20%) chance of showers at night,
• Mostly cloudy with patchy AM fog and late night fog and lingering afternoon fog  Monday through Tuesday night,
• Then sunny Wednesday.
• highs 50-55 Monday lows 39-36. (seasonal averages high 51 low 40)

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Forecast for the Cascades of Lane County:

• AM rain and snow showers likely (60%), rain and snow this afternoon (0.25 in. of rain possible, 1-3 in. of snow possible), occasional rain or snow mainly in the evening (0.10 in. of rain possible, 1-2 in. of snow possible),
• Cloudy with AM rain and snow likely (60%), a good (50%) chance of afternoon rain, then cloudy with a rain likely (50%) Friday night,
• AM rain, rain and snow Saturday afternoon and breezy, rain and snow showers Saturday night.
• snow level 3,000 ft. today, 3,500 ft. rising to 5,000 ft. late tonight, 5,000 ft. Friday, 7,000 ft. Friday night, 6,500 ft. falling to 4,500 ft. Saturday, then 2,500 ft. Saturday night.
• highs 33-42 cooling to 36 Saturday lows 29-37 cooling to 25 Saturday night.
• Cloudy with a (50%) chance of rain and snow showers Sunday, a (30%) chance of rain and snow showers Sunday night,
• Then a mix of clouds and sun with a slight (20%) chance of rain and snow showers Monday, mostly cloudy at night,
• A mix of clouds and sun Tuesday, then partly cloudy Tuesday night and Wednesday.
• snow level 2,500 ft. Sunday, 4,000 ft. Sunday night, 5,000 ft. Monday, free air freezing level 6,500 ft. at night, 8,000 ft. Tuesday, 9,000 ft. at night, then 8,000 ft. Wednesday.
• highs 32-43 lows 26-33.