Here is my weekly weather quiz question for the last time. What is “Shear?” Here is the correct answer. Shear is variation in wind speed (speed shear) and/or direction (directional shear) over a short distance within the atmosphere. Shear usually refers to vertical wind shear, i.e., the change in wind with height, but the term also is used in Doppler radar to describe changes in radial velocity over short horizontal distances. I’ll have a new weekly weather quiz question for you starting Monday. 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 High Pressure Ridge (Shaded “Arch” shape with blue arrows) will keep us in sunshine and pleasant weather for Monday and Tuesday.  An upper level low (Shaded “U” shape with blue arrows on previous graphic) returns a slight chance of showers by Wednesday night. A surface frontal system moves through the Pacific Northwest enhancing the chance of showers. The Summer Solstice occurs Monday at 3:34 PM PDT. That is the official beginning of Summer and the Full Strawberry moon will be out too.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 32 in the Good category measuring Ozone.

Oakridge: The Air Quality Index is 6 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 31 in the Good category measuring Ozone.

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

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Advisories: Non At This Time.

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

• Partly cloudy tonight,
• Mostly sunny and warmer Monday, partly cloudy in the evening, mostly cloudy late at night,
• AM clouds and sun, mostly sunny Tuesday afternoon, mostly clear Tuesday night,
• Mostly sunny Wednesday AM, partly cloudy in the afternoon, partly cloudy with a slight (20%) chance of showers Wednesday night.
• lows 5o-52 highs near 77.
• A mix of clouds and sun and a bit cooler with a (30%) chance of showers Thursday, partly cloudy with a (30%) chance of showers Thursday night,
• AM clouds, a mix of clouds and sun with a slight (20%) chance of showers Friday afternoon, partly cloudy with a slight (20%) chance of evening showers, just partly cloudy late at night,
• Then partly cloudy and a bit warmer Saturday through Sunday.
• highs 75-80 lows near 52. (seasonal averages high 74 low 48)

 

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Eugene-Springfield Pollen Count:

Grass………. Moderate (19)

Trees………. Low (10)

Last Counted: 6/16/16

Data Courtesy of Oregon Allergy Associates.

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Forecast for Roseburg:

• Partly cloudy this evening, mostly clear late tonight,
• Sunny and a bit warmer Monday, mostly clear in the evening, partly cloudy late Monday night,
• Mostly cloudy in the AM, sunny Tuesday afternoon, clear in the evening, partly cloudy at night,
• Partly cloudy and a bit warmer Wednesday, partly cloudy with a slight (20%) chance of showers late Wednesday night.
• lows 52-55 highs 80-82.
• Mostly cloudy with a slight (20%) chance of showers Thursday AM, partly cloudy with a (30%) chance of afternoon showers, a slight (20%) chance of evening showers, just mostly cloudy late Thursday night and Friday AM, sunny and a bit cooler Friday afternoon, mostly clear at night,
• Mostly sunny Saturday, then partly cloudy and a bit warmer Saturday night and Sunday.
• highs 82-86 lows 54-58. (seasonal averages high 77 low 53)

 

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

• Partly cloudy tonight,
• Partly cloudy Monday and in the evening, mostly cloudy late at night and Tuesday AM, sunny and a bit warmer Tuesday afternoon, just partly cloudy Tuesday night,
• Partly cloudy Wednesday and in the evening, mostly cloudy with a slight (20%) chance of showers late Wednesday night.
• lows near 54 highs near 64.
• Mostly cloudy with a (30%) chance of showers Thursday AM, partly cloudy with a (40%) chance of showers in the afternoon, just partly cloudy Thursday night and Friday, becoming clear in the evening, partly cloudy Friday night,
• Partly cloudy Saturday through Sunday AM, then , then sunny Sunday afternoon.
• highs near 64 lows near 54. (seasonal averages high 62 low 51)

 

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Forecast for the Cascades in Lane County:

• Mostly clear tonight,
• Mostly sunny and a bit warmer Monday and Tuesday, partly cloudy Monday night, clear Tuesday night,
• Mostly sunny Wednesday AM, then partly cloudy in the  afternoon and Wednesday night.
• free air freezing level 11,000 ft. tonight and Monday, then 12,000 ft. Monday night through Wednesday night.
• lows 42-39 warming back to 44 Wednesday night highs near 68.
• Partly cloudy and bit cooler with a (30%) chance of showers Thursday afternoon and at night,
• A mix of clouds and sun with with a slight (20%) chance of showers Friday AM, a mix of clouds and sun and a bit cooler in the afternoon, then partly cloudy and a bit warmer Friday night through Sunday.
• snow level above 8,000 ft. Thursday through Friday, free air freezing level 12,000 ft. Friday night through Saturday night, then 11,000 ft. Sunday.
• highs 66-64 warming to 67 Sunday lows 40-42.

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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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