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 dried us Saturday. The Jet Stream (Shaded area with blue arrows) continues to bring westerly airflow our. That means a continuation of  the ocean moisture feed to the Pacific Northwest as shown on maps 1,2 &3, but you can see on days 3 through 7 a series of frontal systems will march into the Pacific Northwest continuing the wet weather.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 30 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 15 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 26 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:

• Mostly cloudy with patchy fog this AM with a slight (20%) chance of showers, a slight (20%) rain and a bit cooler this afternoon (under 0.10 in. of rain possible), a slight (20%) chance of rain tonight with patchy fog late,
• Patchy AM fog, mostly cloudy and a bit cooler with rain Monday, evening showers likely (70%), a slight (20%) chance of showers with patchy fog late Monday night,
• Patchy AM fog, mostly cloudy and a bit cooler with a (40%) chance of showers Tuesday, then rain likely (70%) Tuesday night.
• highs 62-59 lows 48-53.
• Mostly cloudy with rain likely (70%) Wednesday and at night,
• A bit warmer with a (40%) chance of rain Thursday, a slight (20%) chance of showers Thursday night,
• Mostly cloudy with a (40%) chance of rain and a bit cooler Friday, a good (50%) chance of rain at night,
• Then cloudy and a bit cooler with a good (50%) chance of rain Saturday.
• highs 60-57 lows 50-47. (seasonal averages high 61 low 40)

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Your College Football Forecast:

Saturday October 29th:

Ducks vs Arizona State at Autzen Stadium, Eugene, OR – Kickoff 2:00 PM – Too early for an accurate forecast.

Beavers vs Washington State at Reser Stadium, Corvallis, OR – Kickoff 7:45 PM – Too early for an accurate forecast.

 

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Forecast for Roseburg:

• Cloudy and a bit warmer with a (30%) chance of rain today, a slight (20%) chance of rain tonight,
• Mostly cloudy with rain and a bit cooler Monday, a (30%) chance of rain late Monday night,
• Mostly cloudy and a bit warmer with a slight (20%) chance of showers Tuesday, cloudy with a good (50%) chance of evening showers, then rain likely (70%) late Tuesday night.
• highs 62-58 warming back to 62 Tuesday lows 52-50 warming to 53 Tuesday night.
• Mostly cloudy and a bit warmer with rain likely (70%) Wednesday, a (40%) chance of rain Wednesday night and a bit cooler Thursday, a (30%) chance of showers Thursday night,
• Then mostly cloudy with a good (50%) chance of rain Friday through Saturday..
• highs 64-60 lows 50-48. (seasonal averages high 63 low 44)

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

• Cloudy and a bit cooler with a (30%) chance of rain today, a slight (20%) chance of evening coastal rain and rain late tonight while a (30%) of inland rain late tonight,
• Mostly cloudy with AM coastal rain and afternoon rain likely (70%), while inland rain and a bit cooler Monday afternoon, a good (50%) chance of evening coastal showers and a slight (20%) chance of thunderstorms while a (30%) chance of inland showers Monday night, breezy (Wind: S 15-25 mph at the shore while S 10-15 mph inland),
• A slight (20%) chance of showers and a bit warmer Tuesday, then rain likely (70%) at night.
• highs 63-60 warming back to 63 Tuesday lows 52-55.
• Mostly cloudy with rain likely (70%) Wednesday and Wednesday night,
• A (40%) chance of rain and a bit cooler Thursday and Friday, a (30%) chance of rain Thursday night, a good (50%) chance of rain Friday night,
• Then cloudy with a good (50%) chance of rain Saturday.
• highs 63-60 warming to 62 Friday cooling to 60 Saturday lows 52-50. (seasonal averages high 60 low 45)

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Forecast for the Cascades in Lane County:

• A slight (20%) chance of showers this AM, just mostly cloudy and a bit cooler this afternoon and tonight,
• Mostly cloudy with rain and a bit cooler Monday, evening showers, a good (50%) chance of showers at night and Tuesday, then rain likely (70%) Tuesday night.
• snow level 6,500 ft. today, free air freezing level 8,000 ft. tonight, snow level 6,500 ft. Monday and Monday night, 6,000 ft. Tuesday, then 8,000 ft. Tuesday night.
• highs 56-50 lows 36-42.
• Mostly cloudy with rain likely (70%) Wednesday and Wednesday night,
• A bit cooler with a (30%) chance of rain Thursday, a slight (20%) chance of showers at night,
• Mostly cloudy and a bit warmer with a (40%) chance of rain Friday, a good (50%) chance of rain Friday night,
• Then cloudy and a bit cooler with a good (50%) chance of rain Saturday.
• snow level above 8,000 ft. Wednesday, 7,500 ft. Wednesday night and Thursday, above 8,000 ft. Thursday night through Friday night, then 8,000 ft. Saturday.
• highs 52-49 warming back to 52 Friday cooling to 48 Saturday lows 38-35.
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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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