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: None at this time.

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An upper level high pressure ridge ( Shaded “arch” shape) is going to keep sending waves of moisture at us. Another frontal system will push through Oregon on Saturday increasing our chances for rain even more.

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Air Quality Index:

Eugene-Springfield: The Pollution Index is 46 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 118 in the Unhealthy for Sensitive Groups 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:

• Mostly cloudy with showers likely (60%) this evening, a good (50%) chance of showers late tonight (0.10 in. of rain possible).
• Rain likely (60%) Wednesday AM, rain in the afternoon (0.25 in. of rain possible), rain Wednesday night,
• A good (50%) chance of AM showers, showers likely (70%) Thursday afternoon (0.10 in. of rain possible) and Thursday night (0.10 in. of rain possible),
• Mostly cloudy with AM showers likely (60%), a good (50%) chance of showers Friday afternoon, then rain and breezy late Friday night.
• lows 46-42 warming to 47 Friday night highs 52-50 warming to 53 Friday.
• Rain and breezy Saturday, showers likely (60%) at night,
• Mostly cloudy with a good (50%) chance of showers Sunday, a slight (20%) chance of showers Sunday night,
• Mostly cloudy with patchy AM fog, partly cloudy Monday afternoon and night,
• Then patchy AM fog and mostly cloudy Tuesday.
• highs 52-54 Monday lows 42-37. (seasonal averages high 51 low 40)

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Forecast for the Cascades of Lane County:

• Cloudy with rain and snow this evening, rain and snow showers likely (60%) late tonight (0.25 in. of rain possible, 1-3 in. of snow possible),
• AM rain and snow showers, rain and snow Wednesday afternoon (0.50 in. of  rain possible, 1-4 in. of snow possible), rain and snow at night,
• Rain and snow showers Thursday, rain and snow showers likely (60%) in the evening, rain and snow likely (60%) late Thursday night,
• Cloudy with AM rain likely (60%) Friday, a good (50%) chance of afternoon rain, then rain likely (60%) Friday night.
• snow level 5,000 ft. tonight, 5,500 ft. Wednesday, 4,000 ft. Wednesday night, 3,000 ft. Thursday, 3,500 ft. Thursday night, 6,500 ft. Friday, then 7,000 ft. Friday night.
• lows 29-25 warming to 33 Friday night highs 38-32 warming to 39 Friday.
• Rain and snow Saturday, rain and snow likely (60%) Saturday night and Sunday, a (30%) chance of rain and snow Sunday night,
• Then a mix of clouds and sun with a slight (20%) chance of rain and snow Monday.
• snow level 6,500 ft. falling to 5,500 ft. Saturday afternoon, 3,000 ft. at night, 2,500 ft. Sunday, 3,500 ft. Sunday night, 5,500 ft. Monday, free air freezing level 7,500 ft. at night, then 7,000 ft. Monday.
• highs 37-43 lows 26-30.