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:

• Partly cloudy this evening, becoming mostly cloudy with a slight (20%) chance of light rain or drizzle late tonight and Thursday AM, a mix of clouds and sun Thursday afternoon, just partly cloudy Thursday night,
• A slight (20%) chance of rain Friday AM, a mix of clouds and sun with a slight (20%) chance of showers in the afternoon, then partly cloudy with a slight (20%) chance of showers Friday night through Saturday night (a bit warmer Saturday).
• lows 47-45 warming to 48 Saturday night highs 65-67.
• A mix of clouds and sun with a slight (20%) chance of showers Sunday AM, a (30%) chance of afternoon showers and a bit warmer, partly cloudy with a slight (20%) chance of showers Sunday night,
• Partly cloudy and a bit warmer Monday (Memorial Day) and Monday night,
• Mostly sunny and a bit warmer Tuesday, then partly cloudy and a bit warmer Tuesday night and Wednesday.
• highs 70-77 lows 47-44 warming to 48 Wednesday. (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:

• Partly cloudy this evening, mostly cloudy with a slight (20%) chance of rain or drizzle late tonight,
• Mostly cloudy with a slight (20%) chance of AM rain or drizzle, just partly cloudy Thursday afternoon, mostly cloudy Thursday night,
• Mostly cloudy with a slight (20%) chance of AM drizzle, mostly sunny Friday afternoon, partly cloudy at night,
• Partly cloudy with a slight (20%) chance of showers and a bit warmer Saturday afternoon and Saturday night.
• lows 49-47 warming back to 49 Saturday night highs 69-74.
• Partly cloudy and a bit warmer with a slight (20%) chance of showers Sunday and in the evening, just partly cloudy late Sunday night,
• Partly cloudy and a bit warmer Monday (Memorial Day) and at night,
• Sunny and a bit warmer Tuesday, then partly cloudy Tuesday night and Wednesday (a bit cooler Wednesday).
• highs 77-82 cooling to 80 Wednesday lows near 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, mostly cloudy with a slight (20%) chance of rain or drizzle late tonight,
• Mostly cloudy with a slight (20%) chance of AM rain or 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 drizzle, just partly cloudy Friday afternoon, mostly clear in the evening, partly cloudy late Friday night,
• Partly cloudy with a slight (20%) chance of showers and a bit warmer Saturday afternoon and Saturday night.
• lows 52-49 warming back to 52 Saturday night highs 60-64.
• Partly cloudy with a slight (20%) chance of showers and a bit cooler Sunday and in the evening, partly cloudy late Sunday night,
• Just partly cloudy and a bit warmer Monday (Memorial Day) and at night,
• Sunny and a bit warmer Tuesday, then partly cloudy Tuesday night and Wednesday (a bit cooler Wednesday).
• highs 62-66 cooling to 64 Wednesday lows 52-50 warming back to 52 Tuesday night. (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 evening showers, a slight (20%) chance of  light rain or drizzle late tonight,
• Partly 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 slight (20%) chance of showers late Thursday night,
• Partly cloudy with a slight (20%) chance of AM rain and snow, a slight (20%) chance of showers and a bit cooler Friday afternoon and again late Friday night,
• Partly cloudy with a slight (20%) 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, mostly cloudy with a slight (20%) chance of showers late Saturday night.
• snow level above 8,000 ft. tonight, 7,500 ft. Thursday, 6,000 ft. Thursday night, 4,500 ft. Friday, 5,500 ft. Friday night, 5,000 ft. rising to 7,500 ft. Saturday, then 7,500 ft. Saturday night.
• lows near 33 highs 53-48 cooling back to 53 Saturday.
• A mix of clouds and sun and a bit warmer Sunday with a slight (20%) chance of AM showers,  a (30%) chance of showers in the afternoon, partly cloudy with a (30%) chance of evening showers, partly cloudy and a bit warmer Sunday night and Monday (Memorial Day) and Monday night,
• Mostly sunny and a bit warmer Tuesday, partly cloudy at night,
• Mostly sunny Wednesday AM, partly cloudy and a bit warmer in the afternoon.
• snow level 5,000 ft. rising to 7,500 ft. Sunday, 8,000 ft. Sunday night, free air freezing level 9,000 ft. rising to 10,000 ft. Monday, 10,000 ft. rising to 11,000 ft. late Monday night, 11,000 ft. rising to 12,000 ft. Tuesday, then 12,000 ft. Tuesday night and Wednesday.
• highs 55-66 lows 35-32 warming to 42 Tuesday night.

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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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