Here is my new weekly weather quiz question. What is an “Active Storage Capacity?”  Please remember to post your answer at the bottom of this page. An email will not suffice. The first person to post the correct answer will win a week of free personalized weather forecasts tailored to your needs.  Good luck.

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An Upper Level Low Pressure Trough (Shaded “U” shape with blue arrows) continues to bring westerly airflow our way. That means a continuation of  the Pacific Ocean moisture feed to the Pacific Northwest. Short-lived High Pressure drys us out for Friday, but you can see on days 3 through 7 frontal activity returns by late Friday.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 25 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 10 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 17 in the Good category measuringParticulate Matter.

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

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Advisories:

• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 8 AM TUESDAY FOR THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES AND THE SISKIYOU MOUNTAINS.
• A Blue-green Algae Health Advisory has been issued for Howard Bay located in Upper Klamath Lake. Water monitoring on the lake has confirmed the presence of high levels of blue-green algae and associated toxins that can be harmful to people and animals. Swallowing water while swimming or inhaling water droplets as a result of high-speed water activities, such as water skiing and power boating, should be avoided in areas where blooms are identified. Although toxins are not absorbed through the skin, contact with cells from a bloom can cause skin irritation and a red, puffy rash in individuals with skin sensitivities, or those who develop rashes easily. Cell counts in other parts of the lake were low.
• A Permanent Health Advisory is in effect for the South Umpqua River and Lawson Bar. Pools in the bedrock along the rivers edge are known to develop Blue-green Algae (cyanobacterial) blooms that can be harmful to pets and people if accidental ingestion occurs. Signs have been posted along several access areas along the river.
• A Blue-Green Algae Health Advisory remains in effect for Agency Lake. Agency Lake is located just north of Upper Klamath Lake near Klamath Falls along Highway 97 in Klamath County. Water monitoring on the lake has confirmed the presence of high levels of blue-green algae and associated toxins that can be harmful to people and animals. Swallowing water while swimming or inhaling water droplets as a result of high-speed water activities, such as water skiing and power boating, should be avoided in areas where blooms are identified. Although toxins are not absorbed through the skin, contact with cells from a bloom can cause skin irritation and a red, puffy rash in individuals with skin sensitivities, or those who develop rashes easily.

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

• Mostly cloudy with showers and a slight (20%) chance of thunderstorms this evening and small hail possible, showers late tonight (0.25 in. of rain possible, more in storms),
• Cloudy with a good (50%) chance of showers AM showers, a mix of clouds and sun and a bit cooler with a good (50%) chance of showers Tuesday afternoon (0.10 in. of rain possible), mostly cloudy in the evening, partly cloudy late at night,
• Mostly cloudy with a slight (20%) chance of AM rain, a (30%) chance of rain and a bit warmer Wednesday afternoon, mostly cloudy with a good (50%) chance of rain and a bit warmer Wednesday night and Thursday, then a good (50%) chance of showers Thursday night.
• lows 50-46 warming to 52 Wednesday night and Thursday night highs 57-64.
• A mix of clouds and sun and a bit cooler Friday, mostly cloudy with a slight (20%) chance of showers Friday night,
• A mix of clouds and sun and a bit cooler Saturday, partly cloudy with a slight (20%) chance of showers at night,
• A mix of clouds and sun with a (30%) chance of showers Sunday, mostly cloudy with a slight (20%) chance of showers Sunday night,
• Then mostly cloudy and a bit cooler with a (40%) chance of showers Monday.
• highs 62-59 lows 50-47. (seasonal averages high 63 low 41)

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Your College Football Forecast:

Friday October 21st – Preliminary Forecast:

Ducks vs California at California Memorial Stadium, Berkeley, CA – Kickoff 7:30 PM – Mostly clear 73 and cooling as the game progresses, Wind NW 5-10 mph.

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Saturday October 22nd – Preliminary Forecast:

Beavers vs Washington at  Husky Stadium, Seattle, WA – Kickoff 3:30 PM – Partly cloudy 57 and cooling as the game progresses,  a slight chance of showers toward the end of the game, Wind NE 5 mph.

 

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Forecast for Roseburg:

• Mostly cloudy with showers and a slight (20%) chance of thunderstorms this evening, showers late  tonight (0.25 in. of rain possible),
• Mostly cloudy with showers likely (70%) in the AM, a good (50%) chance of showers and a bit warmer Tuesday afternoon (under 0.10 in. of rain possible), just mostly cloudy at night,
• Mostly cloudy with patchy AM fog, mostly cloudy with a slight (20%) chance of rain and a bit warmer Wednesday, a (30%) chance of rain Wednesday night,
• Mostly cloudy and a bit warmer with a slight (20%) chance of showers Thursday, a slight (20%) chance of showers Thursday night.
• lows 48-52 highs 63-70.
• Just mostly cloudy and a bit cooler Friday, a slight (20%) chance of showers Friday night,
• Just mostly cloudy and a bit cooler Saturday, a slight (20%) chance of showers Saturday night,
• Then mostly cloudy with a (30%) chance of showers and a bit cooler Sunday and Monday, a slight (20%) chance of showers Sunday night.
• highs 67-60 lows near 50. (seasonal averages high 65 low 44)

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Forecast for The South Oregon Coast Including Coos Bay and North Bend:

• Mostly cloudy with coastal showers and a slight (20%) chance of thunderstorms tonight while inland evening showers with a slight (20%) chance of thunderstorms and inland showers late tonight (0.25 in. of rain possible),
• Mostly cloudy with AM coastal showers likely (70%) and a slight (20%) chance of thunderstorms while inland AM showers likely (70%) and a good (50%) chance of showers and a bit cooler Tuesday afternoon (0.10 in. of rain possible), just mostly cloudy Tuesday night,
• Patchy AM inland fog otherwise mostly cloudy with a slight (20%) chance of showers and a bit warmer Wednesday afternoon, a (40%) chance of rain Wednesday night,
• Mostly cloudy and a bit cooler with a (40%) chance of showers Thursday, then a slight (20%) chance of showers Thursday night.
• lows 50-54 highs 62-65.
• Mostly cloudy with a slight (20%) chance of showers Friday and at night,
• Just mostly cloudy and a bit cooler Saturday, a (40%) chance of showers Saturday night and Sunday, a slight (20%) chance of showers at night,
• Then mostly cloudy with a (30%) chance of showers Monday.
• highs 64-60 lows near 52. (seasonal averages high 61 low 46)

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Forecast for the Cascades in Lane County:

• Cloudy with rain and snow showers tonight (0.50 in. of rain possible, 2-3 in. of snow possible),
• Cloudy with rain and snow showers likely (70%) Tuesday AM, a good (50%) chance of rain and snow showers in the afternoon (0.25 in. of rain possible, 1.00 in. of snow possible), just partly cloudy Tuesday night,
• Mostly cloudy and a bit warmer with a slight (20%) chance of rain Wednesday and in the evening, a (40%) chance of rain late Wednesday night,
• A mix of clouds and sun and a bit warmer with a good (50%) chance of  rain Thursday AM, a good (50%) chance of showers Thursday afternoon, then mostly cloudy with a slight (20%) chance of showers at night.
• snow level 5,500 ft. tonight through Tuesday night, 7,500 ft. Wednesday, then above 8,000 ft. Wednesday night through Thursday night.
• lows 35-32 warming to 42 Thursday night highs 42-54.
• A mix of clouds and sun and a bit warmer with a slight (20%) chance of showers Friday, mostly cloudy with a slight (20%) chance of showers at night,
• A mix of clouds and sun and a bit cooler with a slight (20%) chance of showers Saturday, partly cloudy with a slight (20%) chance of showers Saturday night,
• Mostly cloudy with a (30%) chance of showers Sunday, partly cloudy with a slight (20%) chance of showers at night,
• Then mostly cloudy and a bit cooler with a (40%) chance of showers Monday.
• snow level above 8,000 ft. Friday and Friday night, then 8,000 ft. Saturday through Monday.
• highs 57-52 lows near 40.
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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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