Here is my new weekly weather quiz question. What is “Latent Heat Flux?” 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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A large upper level low (Shaded U shape with blue arrows) continues to send frontal systems at us. A frontal system moves through part of the Pacific Northwest and slides southward. More frontal systems in the parade of storms move toward us Wednesday.  By Saturday yet another frontal system pushes into Oregon. Willamette Pass, Hoodoo and Mt. Ashland are all open with great ski conditions. Check their websites for updates.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 57 in the Moderate category measuring Particulate Matter.

Oakridge: The Air Quality Index is 63 in the Moderate 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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Advisories:

• A HIGH SURF ADVISORY IS IN EFFECT UNTIL 10 PM TONIGHT FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
• A HIGH WIND WATCH IS IN EFFECT FROM TUESDAY AFTERNOON THROUGH WEDNESDAY MORNING FOR THE SOUTH CENTRAL OREGON COAST,  THE CURRY COUNTY COAST, THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL, AND EASTERN LAKE COUNTY.

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

• Mostly cloudy with a good (50%) chance of showers this afternoon (0.10 in. of rain possible), mostly cloudy with a slight (20%) chance of evening showers, just cloudy late tonight,
• Mostly cloudy with a good (50%) chance of rain Tuesday AM, rain increasing in the afternoon ( 0.50 in. of rain possible), rain at night (0.35 in. of rain possible),
• Mostly cloudy and a bit cooler with rain likely (60%) Wednesday AM, showers likely (60%) in the afternoon, then cloudy with a good (50%) chance of showers Wednesday night.
• highs 50-52 cooling 48 Wednesday lows 42-38.
• Mostly cloudy with a (30%) chance of showers and a bit cooler Thursday, a slight (20%) chance of rain Thursday night,
• Partly cloudy and a bit warmer with a slight (20%) chance of rain Friday, mostly cloudy with a (40%) chance of rain at night,
• Cloudy with a good (50%) chance of rain Saturday, rain likely (60%) Saturday night,
• Then mostly cloudy with a (40%) chance of rain Sunday.
• highs 44-48 lows 36-38. (seasonal averages high 47 low 34)

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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.

Advisory Courtesy of Lane Regional Air Protection Agency (LRAPA).

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Forecast for Roseburg:

• Cloudy rain likely (60%) this afternoon (under 0.10 in. of rain possible), a slight (20%) chance of showers this evening,  just mostly cloudy late tonight (under 0.10 in. of rain possible),
• Cloudy with a slight (20%) chance of AM rain, mostly cloudy and a bit cooler with rain likely (60%) Tuesday afternoon (under 0.10 in. of rain possible), rain at night (0.20 in. of rain possible),
• Mostly cloudy with rain likely (60%) Wednesday and a bit cooler in the afternoon, then mostly cloudy with a (30%) chance of showers Wednesday night.
• highs 50-53 cooling back to 50 Wednesday lows 42-44 cooling to 39 Wednesday night.
• Mostly cloudy with a (40%) chance of rain and snow Thursday, cloudy with a (40%) chance of showers Thursday night,
• Mostly cloudy with a slight (20%) chance rain of Friday, a (30%) chance of rain Friday night,
• Rain likely (60%) and a bit warmer Saturday and Saturday night,
• Then mostly cloudy with a (30%) chance of showers Sunday.
• highs 48-50 lows 38-40 cooling back to 38 Friday night. (seasonal averages high 49 low 36)

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

• Mostly cloudy with coastal rain this afternoon while inland rain likely (60%) this afternoon (0.10 in. of rain possible) , a (30%) chance of showers this evening, just mostly cloudy late tonight (under 0.10 in. of rain possible),
• Mostly cloudy with a slight (20%) chance of AM rain, rain and a bit warmer Tuesday afternoon (0.10 in. of rain possible) while a good (50%) chance of rain inland, rain likely (70%) and breezy (Wind: S 20-30 mph at the shore while S 10-20 mph inland, gusts to 45 mph late at night) Tuesday night (0.50 in. of rain possible),
• Cloudy with a good (50%) chance of AM coastal rain and rain with a slight (20%) chance of thunderstorms in the afternoon while Am rain likely (60%) inland and rain likely (70%) and a bit cooler with a slight (20%) chance of  inland thunderstorms Wednesday afternoon, then mostly cloudy with a slight (20%) chance of showers and colder late at night.
• highs 55-58 cooling to 53 Wednesday lows 50-43.
• Mostly cloudy with a (40%) chance of rain Thursday, a (30%) chance of showers Thursday night,
• Mostly cloudy with a (30%) chance of rain Friday, rain likely (60%) Friday night through Saturday night,
• Then mostly cloudy with a (30%) chance of showers Sunday.
• highs 52-55 cooling to 53 Saturday and Sunday lows 42-44. (seasonal averages high 51 low 40).

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Forecast for the Cascades in Lane County:

• Mostly cloudy with showers this afternoon (0.10 in. of rain possible), a (30%) chance of evening showers, just cloudy late tonight,
• Cloudy and a bit warmer with a (30%) of AM rain, rain likely (60%) Tuesday afternoon, rain at night,
• AM rain and snow showers, afternoon rain and snow and a bit cooler Wednesday, then cloudy with a good (50%) chance of rain and snow showers Wednesday night.
• snow level 5,500 ft. today and tonight, 6,000 ft. Tuesday and Tuesday night, 5,000 ft. Wednesday, then 4,000 ft. Wednesday night.
• highs 36-34 lows 28-32 cooling to 23 Wednesday night.
• Mostly cloudy with a (40%) chance of rain and snow showers Thursday, a slight (20%) chance of rain and snow showers at night,
• Partly cloudy with a slight (20%) chance of rain and snow showers Friday, a good (50%) chance of rain Friday night,
• Mostly cloudy with rain and snow likely (60%) Saturday and Saturday night,
• Then cloudy with a (40%) chance of rain and snow Sunday.
• snow level 2,500 ft. Thursday, 3,500 ft. Thursday night, 3,000 ft. Friday, 6,000 ft. Friday, 6,000 ft. Friday night, 4,500 ft. Saturday, then 4,000 ft. Saturday night and Sunday.
• highs near 32 lows 23-26 cooling back to 23 Saturday night.

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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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