Here is my weekly weather quiz question. What is a “Sling Psychrometer?” 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 (Shaded “Arch” shape with blue arrows) tries to dry us out, but low pressure (Shaded “U” shape with blue arrows) keeps returning adding moisture to the mix. No major surface storms are in our near future, but there will be a slight chance of showers through the long Memorial Day Holiday Weekend.

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Air Quality Index:

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

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

Cottage Grove: The Air Quality Index is 17 in the Good category measuring Particulate Matter.

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

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Advisories: None At This Time.

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Home Wood Heating Advisory:

Eugene-Springfield: GREEN – Burning is Allowed.

Oakridge: GREEN – Burning is Allowed.

*Note: Pellet stoves may be used anytime if they produce no visible emissions.

Advisory Courtesy of Lane Regional Air Protection Agency (LRAPA).

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

• Partly cloudy this evening, mostly cloudy late tonight,
• Mostly cloudy with a slight (20%) chance of AM drizzle, mostly cloudy and cooler with possible sun breaks and a slight (20%) chance of showers Wednesday afternoon, partly cloudy in the evening, mostly cloudy late Wednesday night,
• Mostly cloudy with a slight (20%) chance of AM drizzle, a bit cooler with a slight (20%) chance of showers Thursday afternoon, mostly cloudy with a slight (20%) chance of evening showers, a (40%) of drizzle late Thursday night and Friday AM, mostly cloudy with a (40%) chance of showers in the afternoon and evening, then partly cloudy with a good (50%) chance of showers late Friday night.
• lows 49-45 highs 64-60.
• A mix of clouds and sun and a bit warmer with a (30%) chance of showers Saturday, mostly cloudy with a (30%) chance of evening showers, partly cloudy with a good (50%) chance of showers late Saturday night,
•  A mix of clouds and sun and a bit warmer with a slight (20%) chance of showers Sunday afternoon, partly cloudy with a slight (20%) chance of showers Sunday night and Monday AM (Memorial Day), then just partly cloudy Monday night and Tuesday.
• highs 65-72 lows 44-47. (seasonal averages high 69 low 45.)

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Eugene-Springfield Pollen Count:

Grass………. Moderate  (12)

Trees……….  Moderate (53)

Last Counted: 5/24/16

Data Courtesy of Oregon Allergy Associates.

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Forecast for Roseburg:

• Partly cloudy with a slight (20%) chance of showers this evening, mostly cloudy with a slight (20%) chance of drizzle late tonight and Wednesday AM, a bit cooler with a slight (20%) chance of showers in the afternoon, partly cloudy in the evening,  mostly cloudy late Wednesday night,
• Mostly cloudy with a slight (20%) chance of AM drizzle, just mostly cloudy Thursday afternoon and Thursday night,
• Mostly cloudy with a slight (20%) chance of AM drizzle, partly cloudy with a slight (20%) chance of showers Friday afternoon and at night.
• lows 52-47 highs near 68.
• Mostly cloudy with a slight (20%) chance of AM showers, partly cloudy with a slight (20%) chance of showers and a bit warmer Saturday afternoon and evening, just mostly cloudy late Saturday night,
• Partly cloudy and a bit warmer Sunday through Monday night (Memorial Day),
• Then partly cloudy Tuesday AM and sunny and a bit warmer in the afternoon.
• highs 69-75 lows 47-50. (seasonal averages high 72 low 49).

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

• Partly cloudy this evening, becoming mostly cloudy with a slight (20%) chance of drizzle late tonight and Wednesday AM, a slight (20%) chance of showers and a bit cooler in the afternoon, partly cloudy in the evening, mostly cloudy late Wednesday night,
• Mostly cloudy with a slight (20%) chance of AM drizzle, just mostly cloudy and a bit cooler Thursday afternoon, partly cloudy in the evening, mostly cloudy late Thursday night,
• Mostly cloudy with a slight (20%) chance of AM drizzle, then partly cloudy with a slight (20%) chance of showers Friday afternoon and Friday night.
• lows 52-48 highs near 60.
• Partly cloudy with a slight (20%) chance of showers Saturday AM, mostly cloudy with slight (20%) chance of showers in the afternoon and Saturday night,
• Then partly cloudy and a bit warmer Sunday through Tuesday.
• highs 60-65 lows 48-52. (seasonal averages high 60 low 48)

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Forecast for the Cascades in Lane County:

• Partly cloudy with a (30%) chance of showers this evening, just mostly cloudy late tonight,
• Mostly cloudy with a slight (20%) chance of showers and a bit cooler Wednesday afternoon, a slight (20%) chance of isolated evening showers, just partly cloudy late at night,
• Mostly cloudy and a bit cooler with a slight (20%) chance of showers Thursday afternoon, mostly cloudy with a (40%) chance of rain, drizzle and snow showers late Thursday night,
• Mostly cloudy with a good (50%) chance of rain, drizzle and snow in the AM, then a bit cooler with a good  (50%) chance of rain and snow showers Friday afternoon and Friday night.
• snow level 7,500 ft. tonight, 7,000 ft. Wednesday, above 8,000 ft. Wednesday night, 7,000 ft. Thursday, 5,500 ft. late Thursday night, 4,000 ft. Friday, then 5,000 ft. Friday night.
• lows 36-33 highs 52-44.
• A mix of clouds and sun with a good (50%) chance of rain and snow showers Saturday AM, a good (50%) chance of showers and a bit warmer in the afternoon, partly cloudy with a (30%) chance of evening showers, a slight (20%) chance of showers late at night,
• A mix of clouds and sun and a bit warmer with a slight (20%) chance of showers Sunday, partly cloudy with a slight (20%) chance of evening showers, partly cloudy with a slight (20%) chance of showers late Sunday night and Monday AM (Memorial Day), then just partly cloudy and a bit warmer Monday afternoon through Tuesday.
• snow level 5,000 ft. rising to 6,000 ft. Saturday, 6,000 ft. Saturday night, 6,500 ft. rising to 7,500 ft. Sunday afternoon, 8,000 ft. Monday morning, free air freezing level 10,000 ft. Monday afternoon and Monday night, then 10,000 ft. rising to 11,000 ft. Tuesday.
• highs 52-60 lows near 34.

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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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