Here is my weekly weather quiz question. What is  “Radar Reflectivity?” 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 (Shaded “U” shape with blue arrows) is returning our rain chances. A frontal system moves in today increasing the rain chance over Oregon. An upper level ridge of high pressure (Shaded “Arch” shape with blue arrows) takes over starting to clear us out late Monday and keeping the sunshine around for the rest of the workweek.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 45 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 12 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 29 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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Eugene-Springfield Pollen Count:

Grass………. Low (0)

Trees………. High (358)

Last Counted: 3/24/16

Data Courtesy of Oregon Allergy Associates.

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

• Partly cloudy this evening, becoming mostly cloudy with a slight (20%) chance of rain late tonight,
• Cloudy and a bit cooler with rain likely (70%) Saturday (0.10 in. of rain possible), rain in the evening, showers late Saturday night (0.25 in. of rain possible),
• Mostly cloudy with AM showers likely (70%), a bit cooler with showers likely (70%) and a slight (20%) chance of thunderstorms Easter Sunday afternoon (0.10 in. of rain possible), showers likely (70%) and a slight (20%) chance of thunderstorms in the evening, showers likely (60%) late Sunday night (0.10 in. of rain possible, more in storms),
• Mostly cloudy with a good (50%) chance of showers Monday, partly cloudy with a slight (20%) chance of evening showers, then just partly cloudy late Monday night.
• lows 42-44 cooling to 37 Monday night highs 55-53.
• Then mostly sunny and a bit warmer Tuesday, Wednesday, Thursday, and Friday, mostly clear each night.
• highs 56-69 lows 36-38. (seasonal averages high 58 low 38).

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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 Roseburg:

• Partly cloudy with a slight (20%) chance of rain late tonight,
• Cloudy with a good (50%) chance of rain and a bit warmer Saturday (under 0.10 in. of rain possible), evening rain, showers likely (70%) late Saturday night (0.15 in. of rain possible),
• Mostly cloudy with AM showers, showers likely (70%) and a bit cooler Easter Sunday afternoon (0.10 in. of rain possible) and in the evening, rain and snow showers late Sunday night (0.10 in. of rain possible, snow level 3,500 ft. falling to 2,500 ft. late at night),
• Mostly cloudy with rain and snow showers likely (60%) Monday, then a slight (20%) chance of showers in the evening and just mostly cloudy Monday night.
• lows 39-42 cooling back to 39 Sunday night warming back to 42 Monday night highs 58-55.
• Mostly sunny and a bit warmer Tuesday and Wednesday, mostly clear Tuesday night, mostly clear Wednesday night,
• Then sunny Thursday and Friday, clear Thursday night.
• highs 60-66 lows 42-38 warming to 43 Thursday night. (seasonal averages high 59 low 40).

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

• Partly cloudy this evening, mostly cloudy with a slight (20%) chance of rain late tonight (under 0.10 in. of rain possible),
• Cloudy Saturday with coastal AM rain and rain likely (70%) in the afternoon and a bit warmer while inland rain likely (70%) Saturday (0.15 in. of rain possible), evening rain, showers likely (70%) late Saturday night (0.25 in. of rain possible),
• Mostly cloudy with a good (50%) chance of AM coastal showers and showers likely (70%) and a bit cooler Easter Sunday afternoon while showers likely (70%) inland (0.15 in. of rain possible), evening coastal showers and showers with a slight (20%) chance of coastal thunderstorms late Sunday night while inland showers at night (0.20 in. of rain possible, more in storms),
• Mostly cloudy with showers likely (70%) and a slight (20%) chance of thunderstorms Monday AM, showers likely (70%) and a bit warmer in the afternoon, then just partly cloudy Monday night.
• lows 46-42 warming to 44 Monday night highs 57-52 warming to 54 Monday.
• Mostly sunny and a bit warmer Tuesday, mostly clear at night,
• Sunny and a bit warmer Wednesday, mostly clear at night,
• Then sunny Thursday and Friday, clear Thursday night.
• highs 57-62 lows 43-47. (seasonal averages high 54 low 42).

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Forecast for the Cascades in Lane County:

• Partly cloudy this evening, mostly cloudy late tonight,
• Mostly cloudy with a good (50%) chance of AM rain and snow, rain and snow likely (70%) and a bit cooler Saturday afternoon (0.10 in. of rain possible), rain in the evening, rain and snow showers late at night,
• Mostly cloudy and cooler with rain and snow showers Easter Sunday, evening rain and snow showers likely (70%), snow showers likely (70%) late Sunday night,
• Mostly cloudy with snow showers likely (60%) and a bit warmer Monday, a good (50%) chance of rain and snow showers in the evening, then a slight (20%) chance of rain and snow showers late Monday night.
• free air freezing level 4,000 ft. tonight, snow level 5,000 ft. rising to 6,500 ft. Saturday afternoon, 6,500 ft. falling to 5,500 ft. late Saturday night, 3,000 ft. Sunday and Sunday night, at the surface Monday, then 3,000 ft. Monday night.
• lows 28-24 highs 40-34 warming to 36 Monday.
• Just partly cloudy and warmer Tuesday with a slight (20%) chance of rain and snow showers, just partly cloudy Tuesday night,
• Then mostly sunny and a bit warmer Wednesday, Thursday, and Friday, mostly clear both nights.
• snow level 3,000 ft. Tuesday, 5,500 ft. Tuesday night, 6,500 ft. Wednesday, 7,500 ft. Wednesday night and Thursday, then 9,000 ft. Thursday night and Friday..
• highs 43-53 lows 25-28.

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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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