Here is my weekly weather quiz question for the last time. What is an “okta?” Here is the correct answer. Okta is used for the measurement of total cloud cover. One okta of cloud cover is the equivalent of 1/8 of the sky covered with cloud. 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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Low pressure (“Shaded “U” shape with blue arrows) returns with rain.  A frontal system moved through the Pacific Northwest. Remember, Daylight Saving Time officially ends and Standard Time returns at 2:00 am Sunday. Turn your clocks BACK one hour at bedtime tonight. 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 8 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 11 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 12 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 UNTIL 4 AM SUNDAY FOR NORTHERN AND EASTERN KLAMATH COUNTY, CENTRAL, WESTERN AND EASTERN LAKE COUNTIES.
• 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.

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

• Mostly cloudy with rain possibly heavy at times this evening, rain changing to showers late tonight (0.75 in. of rain possible),
• Mostly cloudy and cooler with showers Sunday (0.25 in. of rain possible) and Sunday night (0.15 in. of rain possible),
• A bit cooler with a good (50%) chance of showers Monday (0.10 in. of rain possible) through Tuesday, then a slight (20%) chance of showers Tuesday night.
• lows 52-38 highs 60-54.
• Partly cloudy with patchy AM and late night fog Wednesday and at night,
• Areas of AM fog, a mix of clouds and sun and a bit cooler Thursday, mostly cloudy with a slight (20%) chance of rain Thursday night,
• A mix of clouds and sun and a bit warmer with a slight (20%) chance of rain Friday, mostly cloudy with a (40%) chance of rain at night,
• Then cloudy with a good (50%) chance of showers Saturday.
• highs 54-56 lows 36-42. (seasonal averages high 57 low 39)

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Forecast for Roseburg:

• Mostly cloudy with rain tonight (0.75 in. of rain possible),
• Mostly cloudy and cooler with AM showers, showers and a slight (20%) chance of thunderstorms Sunday afternoon (0.10 in. of rain possible), evening showers, showers and a slight (20%) chance of thunderstorms and colder Sunday night (0.15 in. of rain possible),
• Showers likely (70%) Monday AM, showers likely (70%) and a bit cooler in the afternoon (0.10 in. of rain possible), a good (50%) chance of showers Monday night (under 0.10 in. of rain possible),
• Mostly cloudy with a good (50%) chance of showers Tuesday, then a slight (20%) chance of showers at night.
• lows 54-38 highs 62-46.
• Partly cloudy Wednesday, partly cloudy with areas of fog late Wednesday night and Thursday AM, mostly cloudy in the afternoon and late at night with areas of fog,
• Mostly cloudy and a bit warmer with a slight (20%) chance of rain Friday, mostly cloudy Friday night,
• Cloudy with a (30%) chance of rain Saturday.
• highs 57-62 cooling to 59 lows near 38-42. (seasonal averages high 59 low 42)

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

• Cloudy with coastal rain this evening and rain likely (70%) late tonight while rain inland and breezy (Wind: SW 15-25 mph gusts to 40 mph decreasing to SW 10-15 mph late tonight) tonight (0.70 in. of rain possible),
• Mostly cloudy with showers Sunday AM, showers and cooler with a slight (20%) chance of thunderstorms in the afternoon and evening (0.15 in. of rain possible), showers at night,
• Showers likely (70%) and a slight (20%) chance of thunderstorms Monday AM, showers likely (60%) in the afternoon (0.15 in. of rain possible), a (40%) chance of showers Monday night,
• Mostly cloudy with a good (50%) chance of showers Tuesday, then a slight (20%) chance of showers at night.
• lows 56-43 highs 59-57.
• Just partly cloudy Wednesday, partly cloudy with areas of fog late Wednesday night,
• Areas of AM fog, mostly cloudy and a bit cooler Thursday, mostly cloudy with patchy fog late at night,
• Mostly cloudy and a bit warmer with a slight (20%) chance of rain Friday and Friday night,
• Then cloudy and a bit cooler with a good (50%) chance of rain Saturday.
• highs 57-62 cooling to 58 Saturday lows 45-47. (seasonal averages high 58 low 45).

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Forecast for the Cascades in Lane County:

• Cloudy with rain, possibly heavy this evening, showers (1.50 in. of rain possible) and breezy (Wind: SW 15-25 mph gusts to 45 mph) tonight,
• Mostly cloudy and cooler with showers and breezy (Wind: SW 10-20 mph gusts to 40 mph) Sunday and in the evening, rain and snow showers and colder Sunday night (0.25 in. of rain possible, 1-3 in. of snow possible),
• Mostly cloudy and cooler with rain and snow showers and a bit cooler Monday,  a good (50%) chance of rain and snow showers Monday night and Tuesday, then a (40%) chance of rain and snow showers Tuesday night.
• snow level above 8,000 ft. today, 9,000 ft. falling to 6,500 ft. late tonight, 5,500 ft. Sunday, then 4,500 ft. Sunday night through Monday night.
• lows 40-23 highs 43-36.
• Partly cloudy and warmer Wednesday and at night,
• A mix of clouds and sun and a bit warmer Thursday, mostly cloudy with a slight (20%) chance of rain and snow Thursday night,
• A mix of clouds and sun and a bit warmer with a slight (20%) chance of rain and snow Friday, partly cloudy with a slight (20%) chance of rain at night,
• Then mostly cloudy with a good (50%) chance of rain Saturday.
• free air freezing level 4,500 ft. Wednesday, 5,500 ft. Wednesday night and Thursday, snow level 6, 500 ft. Thursday night, 5,500 ft. Friday, 7,500 ft. Friday night, then 7,000 ft. Saturday.
• highs near 39-45 lows 25-32.

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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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