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) replaces high pressure. Rain returns as a frontal system marches across Oregon tonight. By Saturday a frontal system will be poised offshore ready to move in. By Easter Sunday the cold front will be passed us and we may see the showers drop off a bit late in the day.

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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 10 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 16 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 (159)

Last Counted: 3/23/16

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:

• Mostly cloudy with rain this evening, rain changing to showers late tonight (0.25 in. of rain possible),
• A good (50%) chance of AM showers, a slight (20%) chance of showers and slightly warmer Thursday afternoon (under 0.10 in. of rain possible), a slight (20%) chance of evening showers, a (40%) chance of showers Thursday night (under 0.10 in. of rain possible),
• Mostly cloudy with a good (50%) chance of showers Friday (under 0.10 in. of rain possible), just partly cloudy at night,
• More clouds to mostly cloudy and warmer with a slight (20%) chance of rain Saturday afternoon, then mostly cloudy with rain likely (70%) Saturday night.
• lows 44-38 warming to 44 Saturday night highs 56-60.
• Mostly cloudy with rain likely (70%) and a bit cooler Easter Sunday, a good (50%) chance of showers Sunday night,
• Showers likely (60%) Monday, a slight (20%) chance of showers at night,
• Partly cloudy and a bit warmer Tuesday, mostly clear Tuesday night,
• Then mostly sunny and a bit Wednesday.
• highs 54-60 lows near 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:

• Mostly cloudy with a slight (20%) chance of evening rain, a good (50%) chance of rain late tonight (under 0.10 in. of rain possible),
• A (40%) chance of showers and a bit cooler Thursday (under 0.10 in. of rain possible, snow level 3,500 ft.), a slight (20%) chance of showers late Thursday night (under 0.10 in. of rain possible, snow level 3,500 ft. late at night),
• Mostly cloudy with a slight (20%) chance of showers and a bit cooler Friday (under 0.10 in. of rain possible, AM snow level 3,000 ft.), just partly cloudy Friday night,
• Mostly cloudy with a slight (20%) chance of rain and a bit warmer Saturday afternoon, cloudy with a (%) chance of rain late Saturday night.
• lows 45-38 highs 62-57 warming back to 62 Saturday.
• Cloudy with a rain likely (70%) and a bit cooler Easter Sunday, mostly cloudy with a good (50%) chance of evening rain, showers likely (70%) at night,
• Cloudy with a good (50%) chance of rain and snow showers Monday, mostly cloudy with a slight (20%) chance of showers Monday night,
• Sunny and a bit warmer Tuesday, clear at night,
• Then sunny and a bit warmer Wednesday.
• highs 55-64 lows 37-42. (seasonal averages high 59 low 40).

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

• Mostly cloudy with a good (50%) chance of rain this evening, rain tonight (0.25 in. of rain possible),
• Mostly cloudy with a (40%) chance of showers and cooler Thursday (under 0.10 in. of rain possible), partly cloudy with a slight (20%) chance of evening coastal showers and mostly cloudy with a slight (20%) chance of coastal showers at night while mostly cloudy and colder with a slight (20%) chance of showers late Thursday night (under 0.10 in. of rain possible),
• Mostly cloudy with a slight (20%) chance of showers Friday (under 0.10 in. of rain possible), just mostly cloudy Friday night,
• Mostly cloudy and a bit warmer Saturday with a (30%) chance of rain, cloudy with a good (50%) chance of evening rain,  rain late Saturday night.
• lows 47-43 warming to 45 Saturday night highs 55-58.
• Mostly cloudy with rain likely (70%) and a bit cooler Easter Sunday, showers likely (70%) Sunday night,
• Mostly cloudy and a bit warmer with a good (50%) chance of showers Monday, just mostly cloudy Monday night,
• Sunny Tuesday, clear at night,
• Then sunny and a bit warmer Wednesday.
• highs 53-60 lows 42-44. (seasonal averages high 54 low 42).

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Forecast for the Cascades in Lane County:

• Mostly cloudy with rain and snow tonight (0.25 in. of rain possible, 1-3 in. of snow possible),
• Cloudy with AM rain and snow showers, a good (50%) chance of rain and snow showers and a bit cooler Thursday afternoon (0.10 in. of rain possible, 1 in. of snow possible), a good (50%) chance of rain and snow showers Thursday night (0.10 in. of rain possible),
• Mostly cloudy with AM snow showers likely (70%), a bit warmer with a rain and snow showers likely (60%) Friday afternoon, decreasing clouds to just partly cloudy Friday night,
• More clouds to mostly cloudy and a bit warmer with a slight (20%) chance of rain Saturday afternoon, then rain likely (60%) at night.
• snow level 5,500 ft. tonight, 3,500 ft. Thursday, 4,000 ft. falling to 3,000 ft. Thursday night, 2,500 ft. Friday, free air freezing level 4,500 ft. Friday night, 5,500 ft. Saturday AM, snow level 6,500 ft. Saturday afternoon, then 6,000 ft. Saturday night.
• lows 28-24 warming to 30 Saturday night highs 36-47.
• Mostly cloudy and colder with rain and snow likely (70%) Easter Sunday, rain and snow showers likely (70%) Sunday night,
• A good (50%) chance of snow showers Monday, a (40%) chance of rain and snow showers Monday night,
• Just partly cloudy and warmer Tuesday and  Tuesday night,
• Then mostly sunny and a bit warmer Wednesday.
• snow level 4,500 ft. Sunday, 3,000 ft. Sunday night, at the surface Monday, 3,000 ft. Monday night, free air freezing level 4,500 ft. Tuesday, 6,000 ft. Tuesday night, then 6,500 ft. Wednesday.
• highs 34-46 lows 24-27.

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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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