Here is my new weekly weather quiz question. What is a “Lightning Channel?

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An Upper Level Low  (“U” shape) is moving eastward and will weaken the moisture flow to the Pacific Northwest to be replaced by a High Pressure Ridge (“Arch” shape). The graphics for days 1-3  show the frontal system, show no frontal systems approaching the Pacific Northwest. The graphics for days 3-7  Friday through next Tuesday show a quiet weather pattern with a frontal system lingering offshore next Tuesday.

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Air Quality Index:

Eugene/Springfield: The Air Quality Index is 32 in the good category measuring Ozone.

Oakridge: The Air Quality Index is 5 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 32 in the Good category measuring Ozone.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

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ADVISORIES:

• A FLOOD WARNING IS IN EFFECT UNTIL EARLY THURSDAY MORNING FOR THE JOHN DAY RIVER AT SERVICE CREEK AFFECTING WHEELER COUNTY DUE TO RAIN AND SNOW MELT.
• A FLOOD WARNING IS IN EFFECT FOR THE SILVIES RIVER NEAR BURNS AFFECTING HARNEY  COUNTY UNTIL   WEDNESDAY EVENING DUE TO RAIN AND SNOW MELT.

HEALTH ADVISORIES:

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

• Mostly clear tonight,
• AM sun with a slight (20%) chance of rain, partly cloudy with a (30%) chance of showers and a slight (20%) chance of thunderstorms and a bit warmer Wednesday afternoon (under 0.10 in. of rain possible), partly cloudy Wednesday night,
• A mix of clouds and sun and a bit warmer Thursday, mostly clear at night,
• Mostly sunny and a bit warmer Friday, then mostly clear Friday night.
• lows 42-53 highs 70-80.
• Sunny and a bit warmer Saturday, clear Saturday night,
• Sunny and a bit warmer Sunday, mostly clear at night,
• Mostly sunny and a bit cooler Monday with a slight (20%) chance of afternoon showers, partly cloudy with a slight (20%) chance of evening rain, just partly cloudy late Monday night,
• Then partly cloudy and a bit cooler Tuesday with a slight (20%) chance of rain in the afternoon.
• highs 88-94 cooling to 82 Tuesday lows 58-62 cooling back to 58 Monday night. (seasonal averages high 67 low 43)

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Home Wood Heating Advisory:

Posted Daily

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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Eugene-Springfield Pollen Count:

Forecast for the Umpqua Valley including Roseburg:

• Mostly clear this evening, becoming mostly cloudy tonight with areas of coastal fog while patchy inland fog late tonight,
• Mostly cloudy start, partly cloudy and a bit warmer with a slight (20%) chance of thunderstorms Wednesday afternoon (under .01 in. of rain possible), mostly cloudy Wednesday night,
• AM clouds, sunny and a bit warmer Thursday afternoon, mostly clear Thursday night,
• Mostly sunny and a bit warmer Friday, then clear Friday night.
• lows 46-54 highs 70-83.
• Sunny and a bit warmer Saturday, clear Saturday night,
• Sunny and a bit warmer Sunday, mostly clear at night,
• Sunny and a bit cooler Monday and Tuesday, mostly clear Monday night.
• highs 92-98 cooling to 85 Tuesday lows near 60. (seasonal averages high 70 low 47)

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

• Mostly clear with a slight (20%) chance of evening thunderstorms, becoming partly cloudy late tonight,
• Mostly cloudy start, partly cloudy with a slight (20%) chance of thunderstorms Wednesday afternoon, mostly cloudy Wednesday night,
• Mostly cloudy start, sunny and a bit warmer Thursday afternoon, partly cloudy in the evening, mostly clear late at night,
• Some AM clouds, sunny and a bit warmer Friday, then clear Friday night.
• lows 43-48 highs 60-67.
• Sunny and a bit warmer Saturday, clear Saturday night,
• Sunny and a bit warmer Sunday, mostly clear at night,
• Mostly sunny and a bit cooler Monday, partly cloudy with a slight (20%) chance of evening showers, mostly clear Monday night,
• Then sunny and a bit cooler Tuesday.
• highs 80-88 cooling to 67 Tuesday lows 60-52. (seasonal averages high 60 low 47)

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Forecast for the Northern Oregon Cascades including the Cascades in Lane County:

• Partly cloudy with a good (50%) chance of evening rain and slight (20%) chance of thunderstorms (under 0.10 in. of rain possible, more in storms), just partly cloudy late tonight,
• Mostly sunny start, a mix of clouds and sun and a bit warmer with a (40%) chance of showers and a slight (20%) chance of thunderstorms Wednesday (0.50 in. of rain possible, more in storms), (40%) chance of evening rain and thunderstorms, just mostly cloudy late Wednesday night,
• Partly cloudy and a bit warmer Thursday afternoon, partly cloudy at night,
• Mostly sunny and a bit warmer Friday, then clear Friday night.
• snow level 6,500 ft. tonight and Wednesday, 7,000 ft. Wednesday night, free air freezing level 9,000 ft. Thursday, 10,000 ft. Thursday night, 11,000 ft. Friday, then 13,000 ft. Friday night.
•  lows 33-43 highs 53-68.
• Sunny and a bit warmer Saturday, clear Saturday night,
• Mostly sunny and a bit warmer Sunday, partly cloudy with a slight (20%) chance of evening rain, just partly cloudy late at night,
• AM sun, a mix of clouds and sun with a (40%) chance of rain Monday afternoon, partly cloudy with a (40%) chance of evening rain, just partly cloudy late Monday night,
• Then partly cloudy and a bit cooler with a (30%) chance of rain Tuesday afternoon.
• free air freezing level 14,000 ft. Saturday, 15,000 ft. Saturday night, 14,000 ft. Sunday, then snow level above 8,000 ft. Sunday night through Tuesday.
• highs 72-75 cooling to 69 Tuesday lows 47-45.