Here is my weekly weather quiz question for the last time. What is an “Active Storage Capacity?” Here is the correct answer. Active Storage Capacity: In hydrologic terms, the total amount of reservoir capacity normally available for release from a reservoir below the maximum storage level. It is total or reservoir capacity minus inactive storage capacity. More specifically, it is the volume of water between the outlet works and the spillway crest. I’ll have a new weekly weather quiz question for you starting Monday. 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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Short-lived High Pressure drys us out a little through this afternoon. The Jet Stream (Shaded area with blue arrows) continues to bring westerly airflow our way and that means a continuation of  the ocean moisture feed to the Pacific Northwest, but you can see on days 3 through 7 a series of frontal systems will march into the Pacific Northwest.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 36 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 8 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 37 in the Good category measuring Particulate Matter.

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

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Home Wood Heating Advisory:

Eugene-Springfield: GREEN – Burning is Allowed.

Oakridge: GREEN – Burning is Allowed.

*Note: Pellet stoves may be used anytime if they produce no visible emissions.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

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Advisories:

• 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:

• A mix of clouds and sun this afternoon, cloudy with a good (50%) chance of evening rain, rain likely (70%) with patchy fog late tonight (0.25 in. of rain possible) and Sunday AM, cloudy with a good (50%) showers and a bit cooler Sunday afternoon (0.10 in. of rain possible), a good (50%) chance of rain Sunday night,
• Mostly cloudy with occasional rain Monday, then a good (50%) chance of showers with patchy fog late Monday night.
• highs 62-56 lows 46-50.
• A mix of clouds and sun and a bit cooler with a good (50%) chance of showers Tuesday, mostly cloudy with rain likely (70%) Tuesday night through Wednesday night,
• Mostly cloudy and a bit warmer with a (40%) chance of rain Thursday, a slight (20%) chance of showers Thursday night,
• Then partly cloudy with clouds increasing to mostly cloudy and a bit warmer with a (30%) chance of showers Friday.
• highs near 58 lows 48-50 cooling to 47 Thursday night. (seasonal averages high 61 low 40)

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Your College Football Forecast:

Today:

Beavers vs Washington at Husky Stadium, Seattle, WA – Kickoff 3:30 PM – Partly cloudy, more clouds and a slight chance of rain toward the end of the game 58 and cooling as the game progresses, Wind NW 10 mph.

 

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Forecast for Roseburg:

• Mostly cloudy and a bit warmer this afternoon, a (30%) chance of rain tonight (0.25 in. of rain possible),
• Cloudy with AM rain likely (70%) and a bit cooler Sunday, a (30%) chance of rain at night,
• Mostly cloudy with rain and a bit cooler Monday, cloudy with evening rain, then a good (50%) chance of rain late Monday night.
• highs 64-59 lows 48-52 cooling back to 48 Monday night.
• Patchy AM fog, mostly cloudy and a bit warmer with showers likely (60%) Tuesday afternoon, rain likely (60%) at night through Wednesday night,
• Then mostly cloudy and a bit warmer with a (40%) chance of rain Thursday and a bit cooler Friday, a (30%) chance of showers Thursday night.
• highs 63-60 cooling warming back to 63 Thursday cooling back to 60 Friday lows 48-46. (seasonal averages high 63 low 44)

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

• Mostly cloudy and a bit cooler this afternoon, coastal rain tonight while a good (50%) chance of inland evening rain and inland rain likely (70%) late tonight (0.25 in. of rain possible),
• Mostly cloudy and a bit cooler with rain likely (70%) Sunday, coastal rain at night while evening inland rain and inland rain likely (70%) late Sunday night,
• Mostly cloudy with AM rain, showers and a bit cooler Monday afternoon, cloudy with evening showers likely (70%), then a good (50%) chance of rain late Monday night.
• highs 63-60 lows 54-50.
• Patchy AM fog, showers and a bit warmer Tuesday afternoon, rain likely (70%) at night,
• Mostly cloudy with a (40%) chance of rain Wednesday, rain likely (60%) Wednesday night,
• Mostly cloudy with a (40%) chance of rain Thursday and Friday, a (30%) chance of showers Thursday night.
• highs near 60 lows near 52. (seasonal averages high 60 low 45)

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Forecast for the Cascades in Lane County:

• A mix of clouds and sun and a bit warmer this afternoon, mostly cloudy with a slight (20%) chance of rain tonight,
• Cloudy with a good (50%) chance of rain Sunday AM, a good (50%) chance of rain and a bit cooler in the afternoon, mostly cloudy with a slight (20%) chance of evening rain, a (30%) chance of rain late Sunday night,
• Mostly cloudy with occasional rain Monday, then showers at night.
• snow level 7,000 ft. rising to 8,000 ft. this afternoon, 7,500 ft. tonight, 6,500 ft. Sunday, 7,000 ft. Sunday night, then 6,500 ft. Monday and Monday night.
• highs 53-48 lows near 38.
• Mostly cloudy with a (40%) chance of showers and a bit cooler Tuesday, rain likely (70%) Tuesday night through Wednesday night,
• Mostly cloudy and a bit warmer with a (30%) chance of rain Thursday, partly cloudy with a slight (20%) chance of showers Thursday night,
• Mostly cloudy and a bit warmer with a (30%) chance of rain Friday.
• snow level 6,000 ft. Tuesday, 8,000 ft. Tuesday night, above 8,000 ft. Wednesday, 7,500 ft. Wednesday night and  Thursday, then above 8,000 ft. Thursday night and Friday.
• highs 46-53 lows near 39.
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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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