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 to take over. A weak frontal system is on its way into Oregon today bringing back the chance of rain or snow and possible freezing rain. It will be  followed by another stronger frontal system Thursday, then yet another frontal system next Monday.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 89 in the Moderate category measuring Particulate Matter.

Oakridge: The Air Quality Index is 46 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 54 in the Moderate category measuring Particulate Matter.

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

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Advisories:

• A WINTER STORM WATCH FOR FREEZING RAIN IS IN EFFECT FROM TUESDAY EVENING THROUGH WEDNESDAY AFTERNOON FOR THE NORTHERN OREGON CASCADES AND THE UPPER HOOD RIVER VALLEY.
• 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 a slight (20%) chance of showers this evening, not as cold with patchy fog late tonight and Tuesday AM, a mix of clouds and sun and a bit warmer with a slight (20%) chance of rain in the afternoon, rain Tuesday night (0.30 in. of rain possible),
• Mostly cloudy and a bit warmer with rain Wednesday (0.30 in. of rain possible), cloudy with rain likely (70%) in the evening, a good (50%) chance of showers late Wednesday night (0.15 in. of rain possible),
• Cloudy with a (40%) chance of showers Thursday AM, a good (50%) chance of rain Thursday afternoon, then rain likely (70%) at night.
• lows 27-42 cooling to 39 Thursday night highs 48-54.
• Mostly cloudy and a bit cooler with a good (50%) chance of showers Friday, a slight (20%) chance of showers Friday night,
• Mostly cloudy with a (40%) chance of rain Saturday, cloudy with a good (50%) chance of rain Saturday night,
• Rain likely (70%) Sunday and Sunday night,
• Then cloudy with a good (50%) chance of rain Monday.
• highs near 50 lows 39-42. (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 slight (20%) chance of evening showers, patchy fog late tonight and Tuesday AM, mostly cloudy and a bit warmer with a slight (20%) chance of rain Tuesday afternoon (under 0.10 in. of rain possible), rain Tuesday night (0.15 in. of rain possible),
• Mostly cloudy and a bit warmer with rain likely (60%) Wednesday (0.15 in. of rain possible), cloudy with a (30%) chance of rain Wednesday night (under 0.10 in. of rain possible),
• Cloudy with a (40%) chance of rain Thursday, then rain likely (70%) and breezy Thursday night.
• lows 34-45 cooling to 42 Thursday night highs 49-55.
• Mostly cloudy with showers likely (70%) and a bit cooler 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 and Sunday night,
• The mostly cloudy with a good (50%) chance of rain Monday.
• highs 52-50 lows 39-45 cooling to 42 Sunday night. (seasonal averages high 49 low 38)

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

• Mostly cloudy with a slight (20%) chance of showers this evening , just mostly cloudy late tonight (under 0.10 in. of rain possible),
• Mostly cloudy and a bit warmer Tuesday with a (30%) chance of  afternoon rain (under 0.10 in. of rain possible), rain at night (0.45 in. of rain possible),
• Coastal rain Wednesday while inland rain likely (60%) and a bit warmer in the afternoon (0.30 in. of rain possible), cloudy with coastal rain likely (70%) Wednesday night while inland evening rain likely (70%) and a good (50%) chance of inland rain late at night (0.10 in. of rain possible) and breezy (Wind: S 15-25 mph),
• Cloudy and a bit cooler with a slight (20%) chance of rain Thursday AM, afternoon rain likely (70%), rain and windy Thursday night.
• lows 42-52 cooling to 47 Thursday night highs 56-58.
• Mostly cloudy with 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 and breezy,
• Then mostly cloudy with rain likely (70%) Sunday, Sunday night and Monday.
• highs near 56 lows 45-47 . (seasonal averages high 52 low 41).

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Forecast for the Cascades in Lane County:

• Mostly cloudy with a (30%) chance of rain and snow this evening, just mostly cloudy late tonight,
• Partly cloudy and a bit warmer Tuesday, becoming mostly cloudy with rain and snow Tuesday night (0.50 in. of rain possible),
• Mostly cloudy and a bit warmer with rain Wednesday, cloudy with a good (50%) chance of showers Wednesday night,
• Mostly cloudy with a slight (20%) chance of AM showers, a slight (20%) chance of rain and a bit cooler Thursday afternoon, then rain and snow  Thursday night.
• snow level 4,500 ft. tonight, free air freezing level 6,000 ft. rising to 6,500 ft. Tuesday afternoon, snow level 6,000 ft. Tuesday night, 8,000 ft. Wednesday, 7,500 ft. Wednesday night, 7,000 ft. Thursday, then 4,500 ft. Thursday night.
• lows 23-33 cooling to 27 Thursday night highs 40-44 cooling back to 40 Thursday.
• Mostly cloudy and a bit cooler with rain and snow showers likely (70%) Friday, a slight (20%) chance of rain and snow showers Friday night,
• A (40%) chance of rain and snow and warmer Saturday, cloudy with a (30%) chance of rain and snow Saturday night,
• Mostly cloudy with rain and snow likely (70%) Sunday, cloudy with a good (50%) chance of rain and snow Sunday night,
• Then cloudy with a (40%) chance of rain and snow Monday.
• snow level 4,000 ft. Friday and Friday night,  5,500 ft. Saturday, 6,000 ft. Saturday night,  5,500 ft. Sunday, 5,500 ft. Sunday night, then 5,000 ft. Monday.
• highs 34-38 lows near 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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