Here is my new weekly weather quiz question. What is “Shear?” 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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An upper level low pressure trough is moving down from Canada to returning the chance of rain.  A frontal system moved through Monday with cooler temperatures and the chance of showers.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 26 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 3 in the Good category measuring Ozone.

Cottage Grove: The Air Quality Index is 25 in the Good category measuring Ozone.

Data courtesy of Lane Regional Air Protection Agency (LRAPA).

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Advisories: None At This Time.

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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• Mostly cloudy with a good (50%) chance of showers and a slight (20%) chance of isolated thunderstorms this evening, a good (50%) chance of showers late tonight (0.25 in. of rain possible, small hail possible),
• Partly cloudy with a slight (20%) chance of showers Wednesday AM, a (40%) chance of showers and a bit warmer in the afternoon (under 0.10 in. of rain possible), a slight (20%) chance of evening showers, a good (50%) chance of showers late Wednesday night (under 0.10 in. of rain possible),
• Mostly cloudy with a good (50%) chance of showers Thursday, a slight (20%) chance of evening thunderstorms (under 0.10 in. of rain possible), a good (50%) chance of showers late Thursday night (under 0.10 in. of rain possible),
• Mostly cloudy with a good (50%) chance of showers Friday, a (40%) chance of evening showers, then partly cloudy late Friday night.
• lows 42-47 cooling to 43 Friday night highs 63-65.
• Partly cloudy and a bit warmer Saturday and Saturday night,
• Mostly sunny and a bit warmer Sunday and Monday, mostly clear at night,
• Then sunny and a bit warmer Tuesday.
• highs 69-83 lows 47-53. (seasonal averages high 72 low 47).

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Eugene-Springfield Pollen Count:

Grass………. Very High (246)

Trees………. Low (10)

Last Counted: 6/13/16

Data Courtesy of Oregon Allergy Associates.

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Forecast for Roseburg:

• Mostly cloudy with a (30%) chance of evening showers, partly cloudy with a (30%) chance of showers late tonight (under 0.10 in. of rain possible),
• Mostly cloudy with a (30%) chance of AM showers, mostly cloudy and a bit warmer with a (30%) chance of showers Wednesday afternoon (under 0.10 in. of rain possible) and at night (under 0.10 in. of rain possible),
• Mostly cloudy with a (40%) chance of AM showers, a (40%) chance of showers with a slight (20%) chance of thunderstorms Thursday afternoon and evening (0.10 in. of rain possible), a (40%) chance of showers late Thursday night (under 0.10 in. of rain possible),
• Mostly cloudy and a bit warmer with a good (50%) chance of showers Friday, then partly cloudy with a slight (20%) chance of showers Friday night.
• lows 45-48 highs 66-68.
• Partly cloudy Saturday AM, sunny and a bit warmer in the afternoon, clear Saturday night,
• Mostly sunny and a bit warmer Sunday and Monday, mostly clear both nights,
• Then sunny & warmer Tuesday.
• highs 75-88 cooling to 86 Monday night lows 48-55. (seasonal averages high 75 low 52).

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Forecast for The South Oregon Coast Including Coos Bay and North Bend:

• Mostly cloudy and a (30%) chance of showers tonight (under 0.10 in. of rain possible),
• Partly cloudy with a (30%) chance of showers Wednesday AM, mostly cloudy with a (30%) chance of showers and a bit warmer Wednesday afternoon (under 0.10 in. of rain possible) and at night (under 0.10 in. of rain possible),
• Mostly cloudy with a good (50%) chance of coastal showers Thursday while a good (50%) chance of inland AM showers and showers likely (70%) with a slight (20%) chance of thunderstorms inland in the afternoon (under 0.10 in. of rain possible), a (30%) chance of showers Thursday night (under 0.10 in. of rain possible),
• Mostly cloudy with a good (50%) chance of showers Friday, partly cloudy with a slight (20%) chance of evening showers, then just partly cloudy late Friday night.
• lows 48-52 cooling back to 48 Friday night highs 59-62.
• Partly cloudy in the AM, sunny and a bit warmer Saturday afternoon, clear at night,
• Mostly sunny Sunday and Monday, mostly clear both nights,
• Then sunny and a bit warmer Tuesday.
• highs 62-65 lows near 52. (seasonal averages high 62 low 50)

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Forecast for the Cascades in Lane County:

• Mostly cloudy with evening rain and snow showers likely (70%), a good (50%) chance of rain and snow showers increasing late tonight,
• Partly cloudy with a slight (20%) chance of rain and snow showers Wednesday AM, rain and snow showers likely (70%) with a slight (20%) chance of thunderstorms in the afternoon, a good (50%) chance of rain and snow showers at night,
• Mostly cloudy with a good (50%) chance of AM rain and snow showers, showers likely (70%) with a slight (20%) chance of thunderstorms and a bit cooler Thursday afternoon, a good (50%) chance of showers and a slight (20%) chance of thunderstorms in the evening, a good (50%) chance of showers late Thursday night through Friday evening, then partly cloudy with a slight (20%) chance of showers late Friday night.
• snow level 4,500 ft. tonight, 4,500 ft. rising to 5,500 ft. Wednesday, 5,000 ft. Wednesday night and Thursday, 6,000 ft. Thursday night through Friday night.
• lows 28-35 cooling to 32 Friday night highs near 52.
• Partly cloudy and a bit warmer with a slight (20%) chance of showers Saturday and in the evening, just partly cloudy late Saturday night,
• Mostly sunny in the AM, partly cloudy and a bit warmer Sunday and at night,
• Mostly sunny and a bit warmer Monday, clear at night,
• Then  sunny and a bit warmer Tuesday.
• snow level 6,500 ft. Saturday, above 8,000 ft. Saturday night, free air freezing level 10,000 ft. Sunday, 11,000 ft. Sunday night, 13,000 ft. Monday, then 14,000 ft. Monday night and Tuesday.
• highs 60-74 lows 37-45.

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**Because weather forecasting is a combination of science, intuition, and timing there can be no absolute guarantees that individual forecasts will be 100% accurate. Nature is in a constant state of flux and sudden unexpected weather events can happen.

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Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

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