Here is my new 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 low (Shaded “U” shape with blue arrows) is still controlling the weather of the Pacific Northwest. A frontal system is bringing another wave of showers. Another frontal system adds some moisture for showers continuing Wednesday. An upper level high (Shaded “Arch” shape with blue arrows) tries to dry us our Thursday and Friday, but it looses out to low pressure (Shaded “U” shape with blue arrows) just in time for the Memorial Day Holiday Weekend.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 20 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 5 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 15 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 possible sun breaks and a bit cooler this afternoon with a good (50%) chance of AM showers, showers likely (70%) this afternoon (under 0.10 in. of rain possible), a slight (20%) chance of showers this evening, just mostly cloudy tonight (under 0.10 in. of rain possible),
• Mostly cloudy in the AM, partly cloudy and a bit warmer Tuesday afternoon and evening,  mostly cloudy late Tuesday night,
• Morning clouds, a mix of clouds and sun Wednesday, partly cloudy in the evening, then mostly cloudy Wednesday night.
• highs 60-67 cooling to 65 Wednesday lows 50-45.
• A mix of clouds and sun and a bit cooler with a slight (20%) chance of showers Thursday, mostly cloudy with  a (40%) of showers Thursday night and Friday AM, showers likely (70%) in the afternoon and evening, a slight (20%) chance of showers late Friday night,
• Mostly cloudy with a slight (20%) chance of AM showers, a bit warmer with a good (50%) chance of showers Saturday afternoon and evening, a slight (20%) chance of showers late at night,
• Then a mix of clouds and sun and a bit warmer with a slight (20%) chance of showers Sunday.
• highs 62-66 lows near 45. (seasonal averages high 68 low 45.)

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Eugene-Springfield Pollen Count:

Grass………. Moderate  (9)

Trees……….  Low (14)

Last Counted: 5/20/16

Data Courtesy of Oregon Allergy Associates.

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Forecast for Roseburg:

• Mostly cloudy with showers likely (70%) this afternoon (0.25 in. of rain possible), a slight (20%) chance of showers this evening, just mostly cloudy late tonight,
• Mostly cloudy and much warmer with a slight (20%) chance of showers Tuesday, just mostly cloudy Tuesday night,
• Mostly cloudy and a bit cooler with a slight (20%) chance of showers Wednesday, then just mostly cloudy at night.
• highs 64-72 cooling to 68 Wednesday lows 50-47.
• Mostly cloudy and a bit cooler with a (30%) chance of showers Thursday and Thursday night,
• Cloudy and a bit warmer with a slight (20%) chance of showers Friday, mostly cloudy with a (30%) chance of showers Friday night through Saturday night,
• Then just mostly cloudy Sunday.
• highs 64-66 lows near 48. (seasonal averages high 71 low 48).

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

• Cloudy with a good (50%) chance of showers this afternoon and a bit cooler (0.25 in. of rain possible), a slight (20%) chance of showers this evening, mostly cloudy late tonight (under 0.10 in. of rain possible),
• Mostly cloudy in the AM with a slight (20%) chance of inland showers, partly cloudy and a bit warmer Tuesday with a slight (20%) chance of inland afternoon showers, mostly cloudy Tuesday night,
• Mostly cloudy with a slight (20%) chance of showers and a bit cooler Wednesday, then just mostly cloudy Wednesday night.
• highs 58-60 cooling back to 58 Wednesday lows 52-50.
• Mostly cloudy and a bit cooler with a slight (20%) chance of showers Thursday and at night,
• Cloudy with a slight (20%) chance of showers Friday, mostly cloudy with a (30%) chance of showers Friday night and Saturday AM, partly cloudy with a (30%) chance of showers in the afternoon and evening, mostly cloudy with a (30%) chance of showers late Saturday night,
• Then mostly cloudy and a bit warmer Sunday.
• highs 58-62 lows near 50. (seasonal averages high 60 low 48)

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Forecast for the Cascades in Lane County:

• Mostly cloudy with showers likely (70%) and a slight (20%) chance of thunderstorms this afternoon and this evening (0.10 in. of rain possible), showers decreasing tonight (under 0.10 in. of rain possible),
• Mostly cloudy and a bit warmer with a slight (20%) chance of showers Tuesday afternoon and in the evening, just mostly cloudy Tuesday night,
• A mix of clouds and sun Wednesday, partly cloudy at night.
• snow level 6,000 ft. today, 6,500 ft. tonight and Tuesday, 8,000 ft. Tuesday night, then free air freezing level 9,000 ft. Wednesday and Wednesday night.
• highs 48-52 lows near 36.
•  A mix of clouds and sun and a bit cooler with a slight (20%) chance of showers Thursday, partly cloudy with a (40%) chance of showers Thursday night,
• A (40%) chance of rain and snow showers Friday AM, afternoon and evening showers, rain and snow showers decreasing late Friday night,
• Mostly cloudy with showers likely (70%) Saturday and at night,
• AM clouds then a mix of clouds and sun and a bit warmer with a (40%) chance of showers Sunday.
• snow level 6,500 ft. Thursday, 5,500 ft. Thursday night through Friday night, 5,500 ft. rising to 6.500 ft. Saturday and Saturday night, then 6,000 ft. Sunday.
• highs 47-50 lows 32-35.

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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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