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 drizzle or showers through the long Memorial Day Holiday Weekend.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 21 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 19 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:

• Mostly cloudy with a slight (20%) chance of AM light rain or drizzle, a mix of clouds and sun and cooler with a slight (20%) chance of showers this afternoon, mostly cloudy tonight,
• Mostly cloudy with a slight (20%) chance of AM light rain or drizzle, a slight (20%) chance of showers Thursday afternoon, a (40%) chance of drizzle late Thursday night and Friday AM, mostly cloudy with a good (50%) chance of showers in the afternoon and evening, then partly cloudy with a good (50%) chance of showers late Friday night.
• highs 64-60 lows 47-45.
• 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), partly cloudy Monday night,
• Then mostly sunny and a bit warmer Tuesday.
• highs 65-72 lows 44-47. (seasonal averages high 69 low 45.)

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Eugene-Springfield Pollen Count:

Grass………. Very High  (402)

Trees……….  Low (12)

Last Counted: 5/25/16

Data Courtesy of Oregon Allergy Associates.

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Forecast for Roseburg:

• Mostly cloudy with a slight (20%) chance of drizzle this AM, a bit cooler with a slight (20%) chance of showers this afternoon, partly cloudy this evening, mostly cloudy late tonight,
• 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 rain, partly cloudy with a slight (20%) chance of showers Friday afternoon and at night.
• highs near 68 lows 49-47.
• 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 sunny and a bit warmer Tuesday.
• 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:

• Mostly cloudy with a slight (20%) chance of drizzle this AM, a slight (20%) chance of showers and a bit cooler this afternoon, partly cloudy this evening, mostly cloudy with a slight (20%) chance of coastal drizzle late tonight,
• Mostly cloudy with a slight (20%) chance of AM drizzle, just partly cloudy and a bit cooler Thursday afternoon and evening, mostly cloudy with a slight (20%) chance of coastal drizzle late Thursday night,
• Mostly cloudy with a slight (20%) chance of AM rain,  partly cloudy with a slight (20%) chance of showers Friday afternoon and Friday night.
• highs near 60 lows near 50.
• 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:

• Mostly cloudy with a slight (20%) chance of rain or drizzle and a bit cooler this afternoon, a slight (20%) chance of isolated evening showers, just partly cloudy late tonight,
• Mostly cloudy with a slight (20%) chance of light rain or drizzle Thursday AM, a mix of clouds and sun and a bit cooler in the afternoon, partly cloudy in the evening, mostly cloudy with a (40%) chance of rain or  drizzle late Thursday night,
• Mostly cloudy with a good (50%) chance of rain, drizzle and a slight (20%) chance of 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 7,000 ft. today, above 8,000 ft. tonight, 7,000 ft. Thursday, 6,000 ft. Thursday night, then 5,000 ft. Friday and Friday night.
• highs 52-44 lows near 34.
• A mix of clouds and sun with a good (50%) chance of rain and snow showers Saturday AM, a slight (20%) chance of showers and a bit warmer in the afternoon, partly cloudy with a slight (20%) chance of evening showers, just partly cloudy 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 and Monday night,
• Then mostly sunny Tuesday.
• snow level 5,000 ft. rising to 7,000 ft. Saturday, 7,000 ft. Saturday night and Sunday, above 8,000 ft. Sunday night, above 8,000 ft. Monday AM, free air freezing level rising to 11,000 ft. Monday afternoon , 11,000 ft. falling to 10,000 ft. late. 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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