Here is my weekly weather quiz question for the last time. What is “the chromosphere?” Here is the correct answer. The Chromosphere In solar-terrestrial terms, is the layer of the solar atmosphere above the photosphere and beneath the transition region and the corona. I’ll have a new weekly weather quiz question for you starting 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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A blocking high pressure ridge (Shaded “Arch” shaped with blue arrows) is going to weaken and move away allowing low pressure (Shaded “U” shape with blue arrows. A weak frontal system will be on its way to the Oregon coast Monday bringing back the chance of rain or snow and possible freezing rain. It will be  followed by another stronger frontal system Thursday.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 76 in the Moderate category measuring Particulate Matter.

Oakridge: The Air Quality Index is 49 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 68 in the Moderate category measuring Particulate Matter.

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

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Advisories:

•  A HEALTH ADVISORY CONTINUES FOR SUNSET BAY STATE PARK BEACH LOCATED IN COOS COUNTY FOR HIGHER-THAN-NORMAL FECAL BACTERIA WHICH CAN RESULT IN DIARRHEA, STOMACH CRAMPS, SKIN RASHES, UPPER RESPIRATORY INFECTIONS AND OTHER ILLNESSES. DIRECT CONTACT WITH THE WATER – ESPECIALLY BY CHILDREN AND THE ELDERLY, WHO MAY BE VULNERABLE TO WATERBORNE BACTERIA – SHOULD BE AVOIDED IN THIS AREA UNTIL THE ADVISORY IS LIFTED. VISITORS SHOULD AVOID WADING IN NEARBY CREEKS, POOLS OF WATER ON THE BEACH, OR IN DISCOLORED WATER AND STAY CLEAR OF WATER RUNOFF FLOWING INTO THE OCEAN.

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

• Mostly clear and cold with patchy freezing fog late tonight,
• Mostly cloudy with patchy AM freezing fog and a (40%) chance of rain and snow with a slight (20%) chance of freezing rain, a bit cooler Monday afternoon with a (40%) chance of rain or snow (under 0.10 in. of rain possible), a slight (20%) chance of rain in the evening, not as cold with patchy fog late Monday night and Tuesday AM, a bit warmer with a slight (20%) chance of rain in the afternoon, rain Tuesday night (0.30 in. of rain possible),
• Then mostly cloudy and a bit warmer with rain likely (60%) Wednesday and Wednesday night.
• lows 22-42 highs 40-49.
• Mostly cloudy with rain likely (70%) Thursday, showers likely (70%) at night,
• A good (50%) chance of showers Friday, a slight (20%) chance of rain Friday night,
• Mostly cloudy with a (40%) chance of rain Saturday, then mostly cloudy with a good (50%) chance of rain Saturday night and Sunday.
• highs near 49 lows 39-37. (seasonal averages high 48 low 35)

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Home Wood Heating Advisory:

Eugene-Springfield: RED – Burning is Prohibited.

Oakridge: RED – Burning is Prohibited.

*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:

• Clear this evening, partly cloudy with a slight (20%) chance of snow late tonight, partly cloudy with patchy freezing fog and a slight (20%) chance of rain, a (30%) chance of light freezing rain and a slight (20%) chance of snow toward morning,
• Mostly cloudy with patchy fog and a (30%) chance of rain Monday AM and light AM freezing rain and snow, a (30%) chance of scattered afternoon showers and a bit cooler (under 0.10 in. of rain possible), evening rain likely (70%), rain late Monday night,
• Mostly cloudy with patchy AM fog, just mostly cloudy and a bit warmer with a (30%) chance of rain Tuesday afternoon (under 0.10 in. of rain possible), evening rain likely (60%), rain late Tuesday night (0.20 in. of rain possible),
• Mostly cloudy and a bit warmer with rain likely (70%) Wednesday, then cloudy with a (40%) chance of rain Wednesday night.
• lows 32-44 highs 44-53.
• Rain likely (70%) Thursday, showers Thursday night,
• Showers likely (70%) Friday, a slight (20%) chance of showers Friday night,
• Mostly cloudy with a (30%) chance of rain Saturday and Saturday night,
• Rain likely (60%) and a bit cooler Sunday.
• highs 52-50 lows 42-39 warming to 44 Saturday night. (seasonal averages high 49 low 38)

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

• Mostly clear this evening, mostly cloudy with a good (50%) chance of coastal rain late tonight while a slight (20%) chance of inland rain, a slight (20%) chance of rain and light freezing rain toward morning (under 0.10 in. of rain possible),
• Cloudy with AM coastal rain likely (70%) while a (40%) chance of inland rain and freezing rain Monday AM, a bit cooler with scattered showers in the afternoon (under 0.10 in. of rain possible), a slight (20%) chance of evening showers, just partly cloudy late Monday night (under 0.10 in. of rain possible),
• Mostly cloudy and a bit warmer Tuesday with afternoon coastal rain likely (70%) while a good (50%) chance of inland afternoon rain (under 0.10 in. of rain possible), coastal rain at night while inland evening rain and rain likely (70%) inland late Tuesday night (0.40 in. of rain possible),
• Rain likely (70%) and a bit warmer Wednesday, then cloudy with a good (50%) chance of rain Wednesday night.
• lows 39-49 highs 53-57.
• Mostly cloudy and a bit cooler with rain Thursday, showers at night,
• Showers likely (70%) Friday, a slight (20%) chance of showers Friday night,
• Cloudy with a (30%) chance of rain Saturday, mostly cloudy with a good (50%) chance of rain at night,
• Then rain likely (70%) Sunday.
• highs near 55 lows 45-48. (seasonal averages high 52 low 41).

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Forecast for the Cascades in Lane County:

• Mostly clear and cold tonight,
• Partly cloudy with a good (50%) chance of rain and snow Monday AM, mostly cloudy with a good (50%) chance of rain and snow in  the afternoon (under 0.10 in. of rain possible), a slight (20%) chance of rain and snow in the evening, just mostly cloudy late Monday night,
• A mix of clouds and sun and a bit warmer Tuesday, becoming mostly cloudy with rain and snow Tuesday night,
• Cloudy and a bit warmer with AM rain likely (70%), a good (50%) chance of rain Wednesday afternoon, then cloudy with a good (50%) chance of rain Wednesday night.
• free air freezing level 7,000 ft. tonight, snow level 3,500 ft. Monday and Monday night, free air freezing level 6,500 ft. Tuesday, snow level 5,000 ft. Tuesday night, 7,000 ft. Wednesday, then 7,500 ft. Wednesday night.
• lows 13-33 highs 36-42.
• Cloudy with a good (50%) chance of rain and a bit cooler Thursday, rain and snow showers likely (60%) Thursday night,
• Mostly cloudy and a bit cooler with a good (50%) chance of rain and snow showers Friday, a slight (20%) chance of rain and snow Friday night and Saturday, a (30%) chance of rain Saturday night,
• Then mostly cloudy with a (40%) chance of rain and snow Sunday.
• snow level 6,500 ft. Thursday, 3,500 ft. Thursday night and Friday, 4,500 ft. Friday night,  5,500 ft. Saturday, 6,000 ft. Saturday night, then 5,500 ft. Sunday.
• highs 39-36 lows 27-30.

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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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