Here is my new weekly weather quiz question. What is an “okta?” 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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Low pressure (“Shaded “U” shape with blue arrows) returns with rain.  A frontal system is headed our way. The warm front moved in today followed by the cold front (position shown is Sunday) on Saturday. Sorry, but Halloween will be quite wet. Remember, Daylight Saving Time officially ends and Standard Time returns this weekend at 2:00 am Sunday November 1st (Or at Bedtime Saturday October 31st, Halloween). Turn your clocks BACK one hour. Remember the Fire Department recommends that you check the batteries in your smoke alarms, CO2 detectors, and Raydon detectors to make sure they still work. Change them if necessary.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 14 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 29 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 22 in the Good category measuring Particulate Matter.

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

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Advisories:

• A WIND ADVISORY IS IN EFFECT FROM 11 AM SATURDAY UNTIL 4 AM SUNDAY FOR NORTHERN AND EASTERN KLAMATH COUNTY, CENTRAL, WESTERN AND EASTERN LAKE COUNTIES.
• A HEALTH ADVISORY HAS BEEN LIFTED 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 HAS DROPPED TO SAFE LEVELS.
• 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  HAS BEEN LIFTED 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 LEVELS HAVE DROPPED TO A NON-DANGEROUS LEVEL.

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

• Mostly cloudy with rain at times today (0.25 in. of rain possible), a good (50%) chance of rain tonight (under 0.10 in. of rain possible),
• Cloudy and a bit warmer with rain Saturday (0.50 in. of rain possible), rain heavy at times in the evening, rain changing to showers late Saturday night (0.90 in. of rain possible),
• Mostly cloudy and cooler with showers and a slight (20%) chance of thunderstorms Sunday, then showers Sunday night.
• highs 62-65 cooling to 58 Sunday lows 56-45.
• Mostly cloudy and a bit cooler with a good (50%) chance of showers Monday, a (30%) chance of showers Monday night,
• Mostly cloudy and a bit cooler with a slight (20%) chance of showers Tuesday, then just partly cloudy with patchy fog Tuesday night through Thursday with possible patchy frost Thursday AM in outlying areas.
• highs 56-54 lows 43-35. (seasonal averages high 58 low 40)

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Your Saturday College Football Forecast:

Beavers vs Utah at  Rice-Eccles Stadium, Salt Lake City, Utah– Kickoff 4:00 PM PDT (5:00 PM MDT): Mostly sunny then mostly clear, 65 and cooling as the game progresses, wind S-SE 10-15 mph.

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Forecast for Roseburg:

• Partly cloudy and a bit cooler with a (30%) chance of rain this afternoon (under 0.10 in. of rain possible) and tonight (under 0.10 in. of rain possible),
• Mostly cloudy and a bit warmer with a (40%) chance of rain Saturday (under 0.10 in. of rain possible), rain Saturday night (0.75 in. of rain possible),
• Mostly cloudy with showers and a slight (20%) chance of thunderstorms Sunday AM, showers and cooler in the afternoon, then showers and colder Sunday night.
•  highs 63-66 cooling to 59 Sunday lows 54-47.
• Mostly cloudy with a (40%) chance of showers Monday through Tuesday, a slight (20%) chance of showers Tuesday night,
• Just partly cloudy Wednesday, partly cloudy with patchy fog at night,
• Then mostly cloudy Thursday.
• highs 56-59 lows near 44-35. (seasonal averages high 60 low 43)

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

• Mostly cloudy with a (40%) chance of rain today (under 0.10 in. of rain possible), a good (50%) chance of rain tonight (under 0.10 in. of rain possible),
• Mostly cloudy with a (40%) chance of inland AM rain and inland rain likely (70%) in the afternoon while coastal rain likely (70%) Saturday AM and rain in the afternoon (0.15 in. of rain possible)and breezy (Wind: S 15-25 at the shore and S 10-15 mph inland), then rain and breezy (Wind: S 15-25 mph gusts to 40 mph in the evening inland) Saturday night (0.60 in. of rain possible),
• Mostly cloudy with showers likely (70%) and a slight (20%) chance of thunderstorms Sunday AM, showers and cooler with a slight (20%) chance of thunderstorms in the afternoon, then showers Sunday night.
• highs 60-63 cooling to 58 Sunday lows 57-50.
• Mostly cloudy with a good (50%) chance of showers Monday through Tuesday, a slight (20%) chance of showers Tuesday night,
• Then just partly cloudy Wednesday, mostly cloudy with patchy fog late Wednesday night,
• Then just mostly cloudy Thursday.
• highs 57-59 lows 48-43. (seasonal averages high 58 low 45).

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Forecast for the Cascades in Lane County:

• Cloudy and a bit warmer with rain at times today (0.25 in. of rain possible) and this evening, a good (50%) chance of rain late tonight (0.25 in. of rain possible),
• Rain Saturday (0.50 in. of rain possible) and Saturday night,
• Then mostly cloudy and cooler with showers Sunday, rain and snow showers Sunday night.
• snow level above 8,000 ft. today through Saturday, 8,000 ft. falling to 7,000 ft. late Saturday night, 6,500 ft. falling to 5,500 ft. Sunday afternoon, then 5,000 ft. Sunday night.
• highs 50-55 cooling to 42 Sunday lows 43-30.
• Mostly cloudy with showers likely (70%) and a bit cooler Monday, a (40%) chance of showers Monday night and Tuesday,
• Mostly cloudy with a slight (20%) chance of showers Tuesday night then just partly cloudy Wednesday through Thursday.
• snow level 4,500 ft. Monday and Monday night, 4,000 ft. Tuesday and Tuesday night, then free air freezing level 5,000 ft. Wednesday, then 5,500 ft. Wednesday night and Thursday.
• highs near 35-48 lows 26-22 warming back to 26 Thursday.

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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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