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.

________________

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.

________________

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).

________________

Advisories: None At This Time.

________________

Eugene-Springfield Pollen Count:

Grass………. Low (0)

Trees………. Very High (500)

Last Counted: 3/19/16

Data Courtesy of Oregon Allergy Associates.

________________

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

• Mostly cloudy with showers and a slight (20%) chance of thunderstorms this evening (small hail possible early), showers tonight (0.10 in. of rain possible, more in storms),
• Mostly cloudy with showers likely (70%) and a bit warmer Tuesday (0.10 in. of rain possible), a (30%) chance of evening showers, just mostly cloudy at night (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.
• lows 42-44 cooling back to 42 Thursday night highs 55-60 cooling to 56 Thursday.
• Mostly cloudy with a (30%) chance of showers Friday, just partly cloudy at night,
• More clouds and warmer Saturday, mostly cloudy with a (30%) chance of showers Saturday night,
• Mostly cloudy with a good (50%) chance of rain and a bit warmer 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).

_____

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).

___________________

Forecast for Roseburg:

• Mostly cloudy with showers tonight (0.15 in. of rain possible, snow level 3,500 ft. falling to 3,000 ft. late),
• AM rain and snow showers likely (70%), showers likely (70%) Tuesday afternoon (0.15 in. of rain possible, snow level 3,000 ft. rising to 3,500 ft.), mostly cloudy with a good (50%) chance of showers at night (under 0.10 in. of rain possible, snow level 3,500 ft. falling to 3,000 ft. late at night),
• Just mostly cloudy and a bit warmer Wednesday, mostly cloudy with a (40%) chance of evening rain, rain likely (60%) 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.
• lows near 42 highs 56-63 cooling to 58 Thursday.
• 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 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).

________________

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

• Mostly cloudy with showers and a slight (20%) chance of thunderstorms at the shore tonight while evening inland showers likely (70%) and a slight (20%) chance of isolated thunderstorms and inland showers late tonight (0.45 in. of rain possible),
• Mostly cloudy with coastal showers Tuesday while inland AM showers and showers likely (70%) in the afternoon (under 0.25 in. of rain possible), a (30%) chance of showers at night (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.
• lows 44-48 highs 54-58 cooling to 54 Thursday.
• Mostly cloudy with a slight (20%) chance of showers Friday, just mostly cloudy Friday night and Saturday (a bit warmer), mostly cloudy with a (30%) chance of rain Saturday night through 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).

________________

Forecast for the Cascades in Lane County:

• Mostly cloudy with rain and snow showers tonight (0.25 in. of rain possible, 2-5 in. of snow possible),
• Rain and snow showers Tuesday (0.25 in. of rain possible, 1-3 in. of snow possible), a good (50%) chance of showers Tuesday night, showers decreasing late,
• Just mostly cloudy and a bit warmer Wednesday, mostly cloudy with evening rain, showers late Wednesday night,
• Mostly cloudy with a good (50%) chance of showers and a bit cooler Thursday, then a (40%) chance of showers Thursday night.
• snow level 4,000 ft. tonight, 3,500 ft. Tuesday, 4,000 ft. Tuesday night, free air freezing level 5,500 ft. rising to 6,500 ft. Wednesday afternoon, snow level 6,000 ft. Wednesday night, 4,500 ft. Thursday, then 5,000 ft. Thursday night,
• lows 26-32 highs 40-45 cooling back to 40 Thursday.
• A mix of clouds and sun and a bit warmer with a good (50%) chance of 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 at night,
• Mostly cloudy and a bit cooler with a good (50%) chance of rain Sunday and Sunday night,
• Then mostly cloudy with a good (50%) chance of showers and cooler Monday.
• snow level 3,500 ft. Friday, free air freezing level 4,000 ft. Friday, snow level 3,500 ft. Friday night,  6,000 ft. Saturday, 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.

________________

**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.

________________

Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

________________