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Check out my latest Eugene Daily News Weather Or Not Column They Don’t Always Obey The Rules.

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And don’t forget my latest feature story in the continuing series on service club organizations called This Moose Isn’t Named Bullwinkle.

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And my feature article about Contractors Electric called Is The Ground Wire The White One Or The Black One?

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Here is my weekly weather quiz question. What is a “temperature inversion?”  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 pressure trough has been controlling our weather and will continue to do so for a while longer even though it is weakening. Another upper level low will follow however continuing the chance of rain that we need so much.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 23 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 17 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 20 in the Good category measuring Ozone.

Data courtesy of Lane Regional Air Protection Agency (LRAPA).

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Advisories:

• A HEALTH ADVISORY HAS BEEN CANCELLED FOR DETROIT LAKE LOCATED 46 MILES SOUTHEAST OF SALEM ON THE NORTH SANTIAM RIVER IN LINN AND MARION COUNTIES. WATER MONITORING ON MAY 18, 2015 HAS CONFIRMED THE TOXIN CONCENTRATIONS HAVE DROPPED TO A SAFE LEVEL.

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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• Mostly cloudy with a good (50%) chance of showers this evening, a slight (20%) chance of showers late tonight (under 0.10 in. of rain possible),
• A (30%) chance of AM showers with areas of drizzle, just mostly cloudy Friday afternoon, becoming partly cloudy late at night,
• Cloudy with a slight (20%) chance of showers Saturday AM, a mix of clouds and sun in the afternoon, partly cloudy in the evening, mostly cloudy Saturday night and Sunday AM, then partly cloudy in the afternoon and Sunday night.
• lows 54-47 highs 69-65 warming to 73 Saturday and Sunday.
• Partly cloudy Monday (Memorial Day) through Thursday.
• highs 72-74 lows near 48. (seasonal averages high 68 low 44)
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Eugene-Springfield Pollen Count

Trees: Moderate- 39

Grass: High- 58

Reading as of: 5/20/15

Data courtesy of Oregon Allergy Associates.

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Forecast for the Umpqua Basin including Roseburg:

• Cloudy with a (30%) chance of scattered showers and isolated thunderstorms this evening, a slight (20%) chance of showers late tonight (under 0.10 in. of rain possible),
• A slight (20%) chance of showers Friday, mostly cloudy in the evening, just partly cloudy Friday night through Saturday evening, then mostly cloudy Saturday night,
• lows 54-45 warming to 48 Sunday night highs 68-72.
• Mostly cloudy Sunday AM, partly cloudy in the afternoon through Monday (Memorial Day) and Monday night,
• Mostly cloudy Tuesday and in the evening, partly cloudy Tuesday night,
• Mostly cloudy Wednesday through Thursday AM, then partly cloudy Thursday night.
• highs near 78 lows 48-44. (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 slight (20%) chance of isolated showers this evening (under 0.10 in. of rain possible),  just cloudy late tonight,
• Mostly cloudy with a slight (20%) chance of AM showers Friday, partly cloudy Friday afternoon through Saturday evening, mostly cloudy Saturday night.
• lows 53-48 warming to 50 Sunday night highs 59-62.
• Mostly cloudy Sunday, partly cloudy Sunday night,
• Partly cloudy Monday (Memorial Day), then  mostly cloudy Monday night through Thursday AM, then mostly cloudy in the afternoon.
• highs 60-63 cooling to 59 Thursday lows 50-47. (seasonal averages high 59 low 48)

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Forecast for the Cascades in Lane County:

• Cloudy with showers likely (60%) and a slight (20%) chance of thunderstorms this evening, a slight (20%) chance of showers late tonight (0.10 in. of rain possible, more in storms),
• Cloudy with a (40%) chance of showers Friday, mostly cloudy with a slight (20%) chance of showers in the evening, partly cloudy and colder late Friday night,
• Mostly cloudy Saturday AM, partly cloudy Saturday afternoon through Sunday, then partly cloudy with a slight (20%) chance of showers at night.
• snow level above 8,000 ft. tonight through Friday, 8,000 ft. Friday night, free air freezing level 9,000 ft. Saturday, 10,000 ft. Saturday night and Sunday, then snow level above 8,000 ft. Sunday night.
• lows 43-36 highs 54-59.
• Partly cloudy , mostly cloudy with a slight (20%) chance of showers Monday night,
• A mix of clouds and sun with a slight (20%) chance of showers Monday (Memorial Day) and Tuesday, partly cloudy with a slight (20%) chance of showers Monday night, a slight (20%) chance of showers Tuesday evening,
• A mix of clouds and sun with a slight (20%) chance of showers afternoon showers, partly cloudy with a slight (20%) chance of evening showers Wednesday and Thursday.
• snow level above 8,000 ft. Monday through Thursday.
• highs near 57 lows near 37.

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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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