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Check out my latest Eugene Daily News Weather Or Not Column It’s 363 Miles Long, But What Is It?

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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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No winner this week. Here is my weekly weather quiz question for the last time. What is “Zero Datum?” Here is the correct answer. Zero Datum: In hydrologic terms, a reference “zero” elevation for a stream or river gauge. This “zero” can be referenced (usually within ten feet of the bottom of the channel) to mean sea level, or to any other recognized datum. I’ll have a new weekly weather quiz question for you Monday. 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 trough of low pressure (Shaded “U” shape with blue arrows) will be controlling our weather through the rest of weekend into next week. A frontal system moved its way through the area.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 12 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 11 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 11 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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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• Partly cloudy this evening, mostly cloudy with a slight (20%) chance of showers late tonight,
• Mostly cloudy with increasing showers and a slight (20%) chance of thunderstorms with small hail possible and a bit cooler Sunday (Easter) afternoon and evening (0.25 in. of rain possible), showers late Sunday night (0.20 in. of rain possible),
• Mostly cloudy with a good (50%) chance of showers Monday (under 0.10 in. of rain possible), showers likely (60%) in the evening, a good (50%) chance of showers late Monday night (under 0.10 in. of rain possible),
• Mostly cloudy with a good (50%) chance of showers Tuesday, then a (30%) chance of showers at night.
  lows 35-40 highs 56-59.
• Partly cloudy with a slight (20%) chance of showers Wednesday, just partly cloudy Wednesday night through Thursday night,
• A mix of clouds and sun Friday, mostly cloudy with a (40%) chance of rain at night,
• Then mostly cloudy with a good (50%) chance of showers Saturday.
• highs 62-64 cooling back to 62 Saturday lows 38-42. (seasonal averages high 59 low 39)
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Eugene-Springfield Pollen Count:

Trees: Moderate- 115

Grass: High- 0

Reading as of: 4/3/15

Data courtesy of Oregon Allergy Associates.

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Forecast for the Umpqua Basin including Roseburg:

• Mostly cloudy with a (30%) chance of showers tonight (under 0.10 in. of rain possible, snow level 3,500 ft. falling to 3,000 ft. late at night),
• Mostly cloudy rain and snow showers and a slight (20%) chance of thunderstorms Sunday AM (Easter), showers with a slight (20%) chance of thunderstorms in the afternoon (0.20 in. of rain possible, small hail possible, snow level 2,000 ft. rising to 3,000 ft.), showers likely (70%) with a slight chance of thunderstorms in the evening, then a good (50%) chance of showers late Sunday night (0.10 in. of rain possible, small hail possible, snow level 3,000 ft.),
• A good (50%) chance of AM rain and snow showers Monday, a (40%) chance of showers in the afternoon (under 0.01 in. of rain possible, snow level 2,000 ft. rising to 3,000 ft. in the afternon), showers likely (70%) Monday night (0.15 in. of rain possible, snow level 3,500 ft.),
• Mostly cloudy with showers likely (70%) Tuesday, a (40%) chance of showers at night.
• lows 38-35 warming to 40 Monday and Tuesday highs 53-59.
• Mostly cloudy with a slight (20%) chance of showers Wednesday, partly cloudy with a slight (20%) chance of showers Wednesday night,
• Just partly cloudy Thursday through Friday, mostly cloudy with a slight (20%) chance of rain at night,
• Then mostly cloudy with a (40%) chance of rain Saturday.
• highs 56-66 lows near 40. (seasonal averages high 60 low 41)

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Forecast for the South Oregon Coast including Coos Bay and North Bend:

• Mostly cloudy a slight (20%) chance of showers this evening, coastal showers likely (60%) with a slight (20%) chance of thunderstorms late tonight while a (40%) chance of inland showers with a slight (20%) chance of thunderstorms late tonight (under 0.10 in. of rain possible),
• Mostly cloudy with showers and a slight (20%) chance of thunderstorms with small hail Sunday (Easter) afternoon and evening (0.30 in. of rain possible), a (40%) chance of showers showers late Sunday night (0.15 in. of rain possible),
• Coastal showers likely (70%) Monday while a good (50%) chance of AM inland showers and inland showers likely (60%) in the afternoon (0.20 in. of rain possible), coastal evening and showers likely (60%) Monday night while inland showers at night (0.20 in. of rain possible),
• Mostly cloudy with showers likely (60%) Tuesday, then a (30%) chance of showers Tuesday night.
• lows near 42 highs 52-56.
• Mostly cloudy with a slight (20%) chance of showers Wednesday, partly cloudy Wednesday night through Friday, then mostly with a (40%) chance of rain Friday night and Saturday.
• highs near 57 lows 42-46. (seasonal averages high 54 low 42)

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Forecast for the Cascades in Lane County:

• Partly cloudy with a slight (20%) chance of showers tonight (under 0.10 in. of rain possible),
• Becoming mostly cloudy with increasing showers Sunday (Easter) and a slight (20%) chance of isolated afternoon and evening thunderstorms with small hail possible (0.25 in. of rain possible, 2-5 in. of snow possible), showers Sunday night (0.25 in. of rain possible, 1-3 in. of snow possible),
• Cloudy with a good (50%) chance of showers Monday, showers likely (70%) Monday night and Tuesday, then a good (50%) chance of showers Tuesday night.
• snow level 3,500 ft. tonight through Sunday night, 2,500 ft. Monday, 3,500 ft. Monday night and Tuesday, then 4,000 ft. Tuesday night.
• lows 24-20 warming to 28 Tuesday night highs 39-42.
• A mix of clouds and sun and a bit warmer with a slight (20%) chance of  showers Wednesday, just partly cloudy Wednesday night through Thursday night,
• A mix of clouds and sun Friday, mostly cloudy with a good (50%) chance of showers Friday night,
• Then mostly cloudy with a good (50%) chance of rain Saturday.
• snow level 4,000  ft. Wednesday, free air freezing level 6,000 ft. Wednesday night, 5,500 ft. Thursday, 7,000 ft. Thursday night and Friday, snow level 6,000 ft. Friday night, then 5,500 ft. Saturday.
• highs 45-50 lows 28-32.
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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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