Here is my new weekly weather quiz question. What is “a Parapet Wall?” 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 today 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 95 in the Moderate category measuring Particulate Matter.

Oakridge: The Air Quality Index is 65 in the Unhealthy category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 57 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 cloudy with patchy freezing rain ending and a bit cooler this afternoon with a good (50%) chance of rain (under 0.10 in. of rain possible), a slight (20%) chance of rain this evening, not as cold with patchy fog late tonight 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.
• highs 43-50 lows 35-42.
• 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 50-48 lows 37-40. (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:

• Mostly cloudy with a (30%) chance of scattered showers (under 0.10 in. of rain possible) and a bit cooler afternoon (snow level 1,500 ft. rising to 2,500 ft. this afternoon), a slight (20%) chance of evening showers, patchy fog late tonight,
• Mostly cloudy with patchy AM fog, a bit warmer with a slight (20%) chance of rain Tuesday afternoon (under 0.10 in. of rain possible), rain 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 showers Wednesday night.
• highs 42-55 lows 36-45.
• 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 55-50 lows 43-39 warming back to 43 Saturday night. (seasonal averages high 49 low 38)

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

• Cloudy and a bit cooler with a good (50%) chance of scattered showers this afternoon (under 0.10 in. of rain possible), a slight (20%) chance of evening showers, just partly cloudy late tonight (under 0.10 in. of rain possible),
• Mostly cloudy and a bit warmer Tuesday with afternoon a (30%) chance of  afternoon rain (under 0.10 in. of rain possible), rain at night (0.40 in. of rain possible),
• Rain likely (70%) Wednesday AM, a bit warmer with rain in the afternoon, then cloudy with a good (50%) chance of rain Wednesday night.
• highs 53-57 lows 42-52 cooling to 4 Wednesday night.
• Mostly cloudy and a bit cooler with rain Thursday, showers likely (70%) in the evening, rain late at night and breezy,
• 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 57-54 lows 47-44 warming back to 47 Saturday night. (seasonal averages high 52 low 41).

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Forecast for the Cascades in Lane County:

• Cloudy with a good (50%) chance of rain and snow flurries this afternoon (under 0.10 in. of rain possible), a (30%) chance of rain and snow this evening, just mostly cloudy late tonight,
• A mix of clouds and sun and a bit warmer Tuesday, becoming mostly cloudy with rain or 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.
• snow level 4,500 ft. today and tonight, free air freezing level 6,000 ft. Tuesday, snow level 5,500 ft. Tuesday night, 8,000 ft. Wednesday, then 7,500 ft. Wednesday night.
• highs 36-42 lows 24-33.
• Cloudy with a good (50%) chance of rain and a bit cooler Thursday, rain and snow showers likely (70%) 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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