Here is my new weekly weather quiz question. What is “Obscuration?” 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 weak frontal system is moving into Oregon bringing only some clouds to the Willamette Valley today. There will be a dry spell through Saturday as a high pressure ridge moves closer, then another frontal system will return the shower chances by late Saturday night into Sunday. Remember, Daylight Saving Time officially ends and Standard Time returns at 2:00 am Sunday November 1st (Or at Bedtime Saturday October 31st, Halloween).

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 48 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 6 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 26 in the Good category measuring Particulate Matter.

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

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Advisories:

• A HEALTH ADVISORY CONTINUES FOR WILLOW CREEK RESERVOIR JUST EAST OF THE TOWN OF HEPNER IN MORROW COUNTY (NE CORNER OF OREGON). WATER MONITORING BY THE USGS HAS CONFIRMED THE PRESENCE OF BLUE-GREEN ALGAE TOXINS WHICH CAN BE HARMFUL TO HUMANS AND ANIMALS. SWALLOWING, INHALING OR SKIN CONTACT WITH WATER DROPLETS SHOULD BE AVOIDED.
• A HEALTH ADVISORY CONTINUES FOR THE CLACKAMAS COVE PORTION OF THE CLACKAMAS  RIVER IN CLACKAMAS COUNTY. WATER MONITORING BY THE USGS HAS CONFIRMED THE PRESENCE OF BLUE-GREEN ALGAE TOXINS WHICH CAN BE HARMFUL TO HUMANS AND ANIMALS. SWALLOWING, INHALING OR SKIN CONTACT WITH WATER DROPLETS SHOULD BE AVOIDED.
• 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.
• A HEALTH ADVISORY CONTINUES FOR UPPER KLAMATH LAKE AND AGENCY LAKE DOWN TO KENO DAM, LOCATED JUST NORTH OF KLAMATH FALLS ALONG HIGHWAY 97 IN KLAMATH COUNTY. WATER MONITORING BY THE USGS HAS CONFIRMED THE PRESENCE OF BLUE-GREEN ALGAE TOXINS WHICH CAN BE HARMFUL TO HUMANS AND ANIMALS. SWALLOWING, INHALING OR SKIN CONTACT WITH WATER DROPLETS SHOULD BE AVOIDED.

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

• Mostly cloudy with areas of AM fog, partly cloudy this afternoon, mostly cloudy with patchy fog and a slight (20%) chance of drizzle late tonight and Thursday AM, mostly cloudy and a bit cooler Thursday, party cloudy and colder with patchy fog late Thursday night and Friday AM with possible early AM frost, partly cloudy and just a bit warmer in the afternoon and Friday night with patchy fog late at night.
• highs 65-62 warming back to 65 Friday lows 44-36 warming to 40 Friday night.
• Patchy AM fog, a mix of clouds and sun Saturday, becoming mostly cloudy at night,
• Mostly cloudy and a bit warmer with a slight (20%) chance of rain Sunday through Tuesday.
• highs 64-66 lows near 45. (seasonal averages high 62 low 40)

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Your College Football Forecast:

Preliminary forecast for Thursday October 29th:

Ducks vs Arizona State at Sun Devil Stadium, Tempe, AZ– Kickoff 7:30 PM PDT: Mostly clear, near 78 degrees cooling as the game continues, wind light.

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Preliminary Forecast for Saturday October 24th:

Beavers vs Colorado at Reser Stadium, Corvallis– Kickoff 7:30 PM PDT: Partly cloudy to mostly cloudy, near 60 degrees cooling as the game progresses, wind light.

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Forecast for Roseburg:

• Partly cloudy with patchy AM fog, sunny and warmer this afternoon, partly cloudy this evening, mostly cloudy with patchy fog and a slight (20%) chance of showers late tonight and Thursday AM, partly cloudy and cooler Thursday afternoon, mostly clear in the evening, partly cloudy with patchy fog late at night and Friday AM, sunny in the afternoon, then just partly cloudy Friday night.
• highs 69-66 lows 48-40 warming to 42 Friday night.
• Mostly cloudy and a bit warmer Saturday and Saturday night,
• Mostly cloudy with a slight (20%) chance of rain Sunday through Monday night,
• Then mostly cloudy with a (30%) chance of rain Tuesday.
• highs 67-70 lows 46-50. (seasonal averages high 64 low 44)

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

• Mostly cloudy with patchy fog this AM, partly cloudy this afternoon, mostly cloudy with a slight (20%) chance of inland showers late tonight, patchy fog late tonight and Thursday AM, mostly cloudy with a slight (20%) chance of inland AM showers, partly cloudy in the afternoon, mostly clear in the evening, mostly cloudy with patchy fog late Thursday night,
• Patchy AM fog, sunny Friday, then increasing clouds to just mostly cloudy Friday night.
• highs near 63 lows 48-45 warming back to 48 Friday night.
• Mostly cloudy Saturday, mostly cloudy with a slight (20%) chance of rain Saturday night through Monday night,
• Then mostly cloudy with a (30%) chance of rain Tuesday.
• highs near 65 lows 48-53. (seasonal averages high 60 low 46).

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Forecast for the Cascades in Lane County:

• Mostly sunny and a bit cooler today, partly cloudy this evening, mostly cloudy late tonight and Thursday AM, mostly sunny and cooler Thursday afternoon, mostly clear at night,
• Mostly sunny and a bit warmer Friday, then partly cloudy Friday night.
• free air freezing level 13,000 ft. today, 11,000 ft. tonight, 10,000 ft. Thursday and Thursday night, 11,000 ft. Friday, then 10,000 ft. Friday night.
• highs 59-56 warming to 62 Friday lows 34-39.
• A mix of clouds and sun Saturday, partly cloudy Saturday night,
• Mostly cloudy with a slight (20%) chance of rain Sunday through Tuesday.
• free air freezing level 10,000 ft. Saturday, 9,000 ft. Saturday night, snow level above 8,000 ft. Sunday through Tuesday.
• highs near 62-59 warming to back to 62 Monday cooling to 58 Tuesday lows 39-36 warming to 40 Tuesday.

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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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