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 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 19 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 4 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 20 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 showers this evening, just mostly cloudy late tonight,
• Mostly cloudy and a bit warmer Tuesday with a slight (20%) chance of showers in the afternoon and evening, mostly cloudy late Tuesday night,
• Mostly cloudy and a bit cooler with a slight (20%) chance of Wednesday, partly cloudy in the evening, mostly cloudy late Wednesday night,
• A mix of clouds and sun and a bit cooler with a slight (20%) chance of showers Thursday, mostly cloudy with a slight (20%) chance of evening showers, then a (40%) of showers late Thursday night.
• lows 48-44 highs 68-62.
• Mostly cloudy with a good (50%) of showers Friday and Friday night,
• A mix of clouds and sun and a bit warmer with a slight (20%) chance of showers Saturday, mostly cloudy with a (40%) chance of evening showers, just partly cloudy late at night,
•  Then a mix of clouds and sun and a bit warmer Sunday and Monday (Memorial Day), partly cloudy Sunday night.
• highs 62-68 lows 45-47. (seasonal averages high 69 low 45.)

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Eugene-Springfield Pollen Count:

Grass………. Moderate  (5)

Trees……….  Moderate (57)

Last Counted: 5/23/16

Data Courtesy of Oregon Allergy Associates.

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Forecast for Roseburg:

• Mostly cloudy with a (30%) chance of showers tonight,
• Mostly cloudy and much warmer with a slight (20%) chance of showers Tuesday afternoon and evening, just mostly cloudy at night,
• A bit cooler with a slight (20%) chance of showers Wednesday, partly cloudy in the evening,  mostly cloudy late Wednesday night,
• Then mostly cloudy and a bit cooler with a slight (20%) chance of showers Thursday and Thursday night.
• lows 50-48 highs 72-68.
• Mostly cloudy with a (30%) chance of showers Friday through Saturday, partly cloudy with a (30%) chance of showers Saturday night,
• Just partly cloudy Sunday and in the evening, mostly cloudy with a slight (20%) chance of showers late Sunday night,
• Mostly cloudy Monday AM, then partly cloudy Monday afternoon (Memorial Day).
• highs near 66 lows near 48. (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 coastal showers early this evening, while a (30%) chance of inland showers this evening (under 0.10 in. of rain possible), just mostly cloudy late tonight through Tuesday night,
• Mostly cloudy with a slight (20%) chance of showers and a bit cooler Wednesday, partly cloudy in the evening, mostly cloudy late Wednesday night,
• Then mostly cloudy and a bit cooler with a slight (20%) chance of showers Thursday and at night.
• lows 52-49 highs 62-59.
• Mostly cloudy with a (40%) chance of showers Friday and Friday night,
• Partly cloudy with a (30%) chance of showers Saturday and Saturday night,
• Just partly cloudy and a bit warmer Sunday and in the evening, mostly cloudy with a slight (20%) chance of showers late Sunday night,
• Then mostly cloudy in the AM and partly cloudy Monday afternoon.
• highs near 60 lows near 50. (seasonal averages high 60 low 48)

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Forecast for the Cascades in Lane County:

• Mostly cloudy with a good (50%) chance of evening showers, a slight (20%) chance of showers late 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,
• Mostly cloudy with a slight (20%) chance of showers and a bit cooler Wednesday afternoon, partly cloudy with a slight (20%) chance of evening showers, just partly cloudy at night,
•  A mix of clouds and sun and a bit cooler with a slight (20%) chance of showers Thursday, partly cloudy with a slight (20%) chance of evening showers, then a (40%) chance of rain and snow showers Thursday night.
• snow level 6,000 ft. tonight, 7,500 ft. Tuesday and Tuesday night, 7,000 ft. Wednesday, 7,500 ft. Wednesday night, 7,000 ft. Thursday, then 5,500 ft. Thursday night.
• lows 36-38 cooling to 33 Thursday night highs 53-50.
• A good (50%) chance of rain and snow showers and a bit cooler Friday and Friday night,
• A mix of clouds and sun with rain and snow showers Saturday AM, a good (50%) chance of rain and snow showers in the afternoon and evening, partly cloudy with a slight (20%) chance of showers 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, just partly cloudy late Sunday night,
• Then a mix of clouds and sun Monday (Memorial Day).
• snow level 5,500 ft. Friday and Friday night, 5,500 ft. rising to 6.500 ft. Saturday, 6,500 ft. Saturday night, 7,000 ft. Sunday, 7,500 ft. Sunday evening, then free air freezing level 9,000 ft. late Sunday night and Monday.
• highs 46-52 lows 33-38.

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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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