Here is my weekly weather quiz question for the last time. What is “a Land Breeze?” Here is the correct answer. A Land Breeze is a coastal breeze at night blowing from land to sea, caused by the difference in the rates of cooling of their respective surfaces. 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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An upper level high pressure ridge (Shaded “Arch” shaped area with blue arrows) is weakening and flattening allowing more clouds and some moisture to move into the Pacific Northwest. Hurricane Oho has moved from the central Pacific Ocean and is downgraded to an extratropical low. It will continue to move to the north parallel to the Oregon coast. Oho’s energy and moisture have merged with  a frontal system bringing the chance of rain back to Oregon. Another frontal system will be moving through the Pacific Northwest Tuesday. Just a reminder, 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 27 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 25 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 32 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 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:

• Cloudy with a good (50%) chance of rain this AM, rain (0.25 in. of rain possible) cooler this afternoon and evening, a good (50%) chance of showers late tonight through Monday night (0.20 in. of rain possible),
• A mix of clouds and sun Sunday, then partly cloudy Sunday night through Monday night (Columbus Day),
• highs 72-75 lows 54-50.
• Partly cloudy Tuesday and Tuesday night,
• Then mostly sunny Wednesday, (warmer) Thursday and Friday, partly each night.
• highs 76-74 warming to 77 Thursday and Friday lows 49-47. (seasonal averages high 67 low 42)

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Your Saturday College Football Forecast:

Ducks vs Washington State at Autzen Stadium – Kickoff 3:00 PM PDT: Mostly cloudy with rain in the afternoon, 67 degrees warming to near 70 degrees then cooling a bit as the game progresses, wind S 15-20 mph gusts to 35 mph. You’ll most likely need the rain gear.

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Beavers vs Arizona at Reser Stadium – Kickoff 1:00 PM PDT: Mostly cloudy with rain in the afternoon, 65 degrees and warming to near 70 degrees by the end of the game, wind S 15-20 mph gusts to 35 mph. You’ll most likely need the rain gear.

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Forecast for the Umpqua Basin including Roseburg:

• Partly cloudy with a slight (20%) chance of rain this AM, cloudy and cooler with rain this afternoon, mostly cloudy with showers likely (70%) this evening, a good (50%) chance of showers late tonight (under 0.10 in. of rain possible),
• Partly cloudy and a bit warmer Sunday and Sunday night,
• Then mostly sunny and a bit warmer Monday (Columbus Day) and mostly clear at night.
• highs 75-80 lows 53-50.
• Mostly sunny Tuesday, Wednesday, Thursday and Friday, mostly clear each night.
• highs 82-80 lows 50-52. (seasonal averages high 69 low 46)

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

• Mostly cloudy with a good (50%) chance of AM coastal rain and rain this afternoon while a slight (20%) chance of AM inland rain and rain and cooler this afternoon (0.15 in. of rain possible) and breezy (Wind: S 15-25 mph gusts to 40 mph), evening showers likely (70%) and a (30%) chance of showers tonight (0.15 in. of rain possible),
• Mostly sunny SundayAM,  partly cloudy in the afternoon and Sunday night.
• Mostly sunny Monday (Columbus Day), then mostly clear at night.
• highs near 65 lows 55-52.
• Mostly sunny Tuesday, Wednesday, Thursday and Friday, mostly clear each night.
• highs near 65 lows near 52. (seasonal averages high 62 low 47).

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Forecast for the Cascades in Lane County:

• A mix of clouds and sun this AM, increasing clouds, cooler and breezy (Wind: S 5-10 mph increasing to SW 15-25 mph gusts to 40 mph) with rain likely (70%) this afternoon (0.10 in. of rain possible), evening rain, showers likely (70%) late tonight and breezy (Wind: SW 15-25 mph gusts to 40 mph decreasing to SW 5-15 mph late at night),
• Partly cloudy and a bit warmer with a slight (20%) chance of showers Sunday AM, then partly cloudy in the afternoon through Monday night (Columbus Day).
• snow level above 8,000 ft. today, above 8,000 ft. falling to 7,500 ft. tonight, above 8,000 ft. Sunday, free air freezing level 13,000 ft. Sunday night, then 14,000 ft. Monday and Monday night.
• highs 63-67 lows 42-40.
• Partly cloudy and a bit warmer, mostly clear Tuesday night,
• Then mostly sunny Wednesday, Thursday and Friday, mostly clear each night.
• free air freezing level 14,000 ft. Tuesday and Tuesday night, 13,000 ft. Wednesday, 15,000 ft. Wednesday night, then 14,000 ft. Thursday through Friday.
• highs 70-73 cooling to 69 Friday lows 40-42.

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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.