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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Upper level low pressure (Shaded “U” shape with blue arrows) keeps adding just enough 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 Sunday evening.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 35 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 13 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 35 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 tonight,
• Mostly cloudy, some sun breaks possible and a bit warmer with a slight (20%) chance of showers Friday, partly cloudy Friday night,
• Partly cloudy and a bit warmer Saturday and Saturday night,
• AM clouds, 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 evening showers, just partly cloudy late Sunday night.
• lows 47-45 warming to 49 Saturday night cooling to 46 Sunday night  highs 66-72.
• AM clouds, mostly sunny and a bit warmer Monday (Memorial Day), mostly clear Monday night,
• Mostly sunny and a bit warmer Tuesday, partly cloudy Tuesday night,
• Then partly cloudy and a bit cooler Wednesday through Thursday.
• highs 75-82 cooling back to 75 Thursday lows 44-50. (seasonal averages high 69 low 45.)

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Eugene-Springfield Pollen Count:

Grass………. Moderate  (18)

Trees……….  Moderate (34)

Last Counted: 5/26/16

Data Courtesy of Oregon Allergy Associates.

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Forecast for Roseburg:

• Mostly cloudy tonight,
• 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, mostly clear in the evening,  then partly cloudy and a bit warmer Saturday night through Sunday night.
• lows 47-50 highs 69-76.
• Partly cloudy and a bit warmer Monday (Memorial Day) through Tuesday night,
• Partly cloudy with a slight (20%) chance of thunderstorms and a bit cooler Wednesday and Wednesday night,
• Partly cloudy with a slight (20%) chance of AM showers, then mostly cloudy and a bit cooler with a slight (20%) chance of thunderstorms Thursday afternoon.
• highs 77-84 cooling to 80 Thursday lows 50-54. (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 late tonight and Friday AM, sunny in the afternoon, mostly clear in the evening, then partly cloudy late Friday night through Sunday night.
• lows 49-52 highs 60-63.
• Just partly cloudy and a bit warmer Monday (Memorial Day) through Thursday AM, then mostly cloudy with a slight (20%) chance of thunderstorms Thursday afternoon.
• highs 67-72 cooling to 66 Thursday lows 50-54. (seasonal averages high 60 low 48)

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Forecast for the Cascades in Lane County:

• Partly cloudy with a slight (20%) chance evening showers, mostly cloudy late tonight,
• A slight (20%) chance of AM rain and snow showers, a bit cooler Friday with a slight (20%) chance of showers in the afternoon, then partly cloudy and a bit warmer Friday night through Sunday night.
• snow level 7,000 ft. this evening, 5,000 ft. Friday, free air freezing level 7,500 ft. Friday night, 8,000 ft. rising to 9,000 ft. Saturday, 10,000 ft. falling to 7,500 ft. late Saturday night, 7,500 ft. rising to 9,000 ft. Sunday, 9,000 ft. falling to 8,000 ft. Sunday night.
• lows 33-36 cooling back to 33 Sunday night highs 50-60.
• Partly cloudy in the AM, mostly sunny and a bit warmer Monday (Memorial Day), mostly clear Monday night,
• Mostly sunny and a bit warmer Tuesday, partly cloudy at night,
• Partly cloudy with a slight (20%) chance of showers and thunderstorms and a bit cooler Wednesday afternoon and evening, a slight (20%) chance of showers late Wednesday  night and Thursday AM, then just partly cloudy Thursday afternoon.
• free air freezing level 8,000 ft. rising to 12,000 ft. Monday afternoon, 12,000 ft. rising to 12,000 ft. late Monday night, 12,000 ft. rising to 13,000 ft. Tuesday, 13,000 ft. falling to 12,000 ft. late Tuesday night and Wednesday AM, snow level above 8,000 ft. Wednesday afternoon through Thursday.
• highs 66-72 cooling back to 66 Thursday lows 35-50 cooling to 42 Wednesday 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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