Here is my new 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 trough of low pressure (Shaded “U” shape with blue arrows) will be slowly moving eastward away from us. There will be a short break with high pressure (Shaded “Arch” shape with blue arrows) Wednesday. Then rain returns as a frontal system will be marching across Oregon early Thursday. Sunday another frontal system will swoop down from the northwest.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 10 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 12 in the Good category measuring Particulate Matter.

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

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Advisories:

• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 11 AM TODAY FOR THE EASTERN DOUGLAS COUNTY FOOTHILLS, JACKSON COUNTY, THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES AND THE SISKIYOU MOUNTAINS.

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Eugene-Springfield Pollen Count:

Grass………. Low (0)

Trees………. Very High (500)

Last Counted: 3/19/16

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 showers likely (70%) and a bit warmer today (0.10 in. of rain possible), a (30%) chance of evening showers, just mostly cloudy tonight (under 0.10 in. of rain possible),
• Just mostly cloudy and a bit warmer Wednesday, evening rain, showers late Wednesday night (0.15 in. of rain possible),
• Mostly cloudy with a good (50%) chance of showers and a bit cooler Thursday, then a slight (20%) chance of showers at night.
• highs 55-60 cooling to 56 Thursday lows 42-44 cooling back to 42 Thursday night.
• Mostly cloudy with a (40%) chance of showers Friday, just partly cloudy at night,
• More clouds and warmer Saturday, mostly cloudy with a (30%) chance of rain Saturday night,
• Mostly cloudy with a good (50%) chance of rain and a bit warmer Easter Sunday and Sunday night,
• Then mostly cloudy and a bit cooler with a (40%) chance of showers Monday.
• highs 56-60 cooling back to 56 Monday lows 39-42 cooling back to 39 Sunday night. (seasonal averages high 57 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:

• AM rain and snow showers this AM, showers likely (70%) this afternoon (0.15 in. of rain possible, snow level 3,000 ft. rising to 3,500 ft.), mostly cloudy with a (30%) chance of showers this evening, mostly cloudy tonight (under 0.10 in. of rain possible, evening snow level 3,500 ft.),
• Just mostly cloudy and a bit warmer Wednesday, mostly cloudy with a (40%) chance of evening rain, rain  at night (0.10 in. of rain possible),
• Mostly cloudy with a (30%) chance of AM rain, a (40%) chance of showers and a bit cooler Thursday afternoon, then a slight (20%) chance of showers Thursday night.
• highs 56-63 cooling to 58 Thursday lows near 42.
• Mostly cloudy with a slight (20%) chance of showers Friday, just mostly cloudy Friday night and Saturday (a bit warmer), a slight (20%) chance of rain Saturday night,
• Mostly cloudy with a (30%) chance of rain and a bit cooler Easter Sunday and at night,
• Then mostly cloudy with a (40%) chance of showers Monday.
• highs 58-63 cooling back to 58 Monday lows 40-44 cooling back to 40 Sunday night. (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 coastal showers today while inland AM showers and showers likely (70%) this afternoon (under 0.25 in. of rain possible), a (30%) chance of showers tonight (under 0.25 in. of rain possible),
• Just mostly cloudy and a bit warmer Wednesday, a good (50%) chance of evening rain, coastal rain late Wednesday night while inland rain likely (70%) late (0.15 in. of rain possible),
• Mostly cloudy with a (30%) chance of rain Thursday AM, a (40%) chance of afternoon showers and a bit cooler, then mostly cloudy and colder with a slight (20%) chance of showers Thursday night.
• highs 54-58 cooling to 54 Thursday lows 45-48 cooling back to 45 Thursday night.
• Mostly cloudy with a slight (20%) chance of showers Friday, just partly cloudy Friday night,
• Mostly cloudy Saturday and a bit warmer, mostly cloudy with a (30%) chance of rain Saturday night through Easter Sunday night,
• Then mostly cloudy with a (40%) chance of showers Monday.
• highs 55-60 cooling to 55 Sunday and Monday lows 45-47 cooling to 43 Sunday night. (seasonal averages high 54 low 42).

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Forecast for the Cascades in Lane County:

• Rain and snow showers today (0.25 in. of rain possible, 1-3 in. of snow possible), a good (50%) chance of rain and snow showers tonight, showers decreasing late (under 0.10 in. of rain possible),
• Just mostly cloudy and a bit warmer Wednesday, mostly cloudy with evening rain, rain and snow late Wednesday night,
• Mostly cloudy with AM rain and snow showers likely (70%), a good (50%) chance of rain and snow showers and a bit cooler Thursday, then a (40%) chance of rain and snow showers Thursday night.
• snow level 3,500 ft. today, 4,000 ft. tonight, free air freezing level 4,500 ft. rising to 6,500 ft. Wednesday afternoon, snow level 5,500 ft. Wednesday night, 4,500 ft. Thursday, then 5,000 ft. Thursday night,
• highs 40-45 cooling back to 40 Thursday lows 26-32 cooling back to 26 Thursday night.
• A mix of clouds and sun and a bit warmer with a good (50%) chance of rain and snow showers Friday, just partly cloudy Friday night,
• A mix of clouds and sun and a bit warmer Saturday, more cloudy with a (30%) chance of rain and snow at night,
• Mostly cloudy and a bit cooler with a good (50%) chance of rain and snow Easter Sunday and Sunday night,
• Then mostly cloudy with a good (50%) chance of rain and snow showers and cooler Monday.
• snow level 3,500 ft. Friday, free air freezing level 4,000 ft. Friday night, 6,500 ft. Saturday, snow level 6,000 ft. Saturday night, 5,000 ft. Sunday, 4,000 ft. Sunday night, then 3,500 ft. Monday.
• highs 42-45 cooling to 36 Monday lows 25-30 cooling back to 25 Sunday night.

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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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