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Check out my latest Eugene Daily News Weather Or Not Column It Takes More Than Just Flipping A Coin.

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And don’t forget my latest feature story in the continuing series on service club organizations called “Buffalo Isn’t Only Known For Its Wings.”

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No winner this week. Here is my weekly weather quiz question for the last time. What is “radiational cooling?” Here is the correct answer. Radiational Cooling is the cooling of the Earth’s surface. At night, the Earth suffers a net heat loss to space due to terrestrial cooling. This is more pronounced when you have a clear sky. I’ll have a new weekly weather quiz question for you starting Monday. 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 surface thermal trough of low pressure (Dashed line along the coast) along with an upper level low (“U” shape with blue arrows) slide into Oregon bringing a chance of dry thunderstorms for your Monday. Another upper level low (Shaded “U” shape with blue arrows) will move in mid week adding to a cooling trend and bringing a chance of showers.

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Advisories:

• A RED FLAG WARNING IS IN EFFECT UNTIL 5 AM TUESDAY FOR WIND, LOW RELATIVE HUMIDITY, AND AN INCREASINGLY UNSTABLE ENVIRONMENT AND CRITICALLY DRY FUELS FOR THE CENTRAL OREGON COAST RANGE, THE CENTRAL OREGON CASCADES IN LANE COUNTY, THE CASCADES FOOTHILLS IN LANE COUNTY, THE NORTH OREGON COAST RANGE, THE ENTIRE WILLAMETTE VALLEY, THE NORTH OREGON CASCADES, AND THE NORTH OREGON CASCADE FOOTHILLS. THIS DOES NOT INCLUDE THE COASTAL AREAS.
• A HEALTH ADVISORY CONTINUES FOR THE PRESENCE OF BLUE-GREEN ALGAE FOR WALTERVILLE POND IN LANE COUNTY AND AT DEVILS LAKE IN LINCOLN COUNTY. THE TOXIC ALGAE BLOOM MEANS THAT PEOPLE SHOULD NOT HAVE DIRECT CONTACT WITH THE AFFECTED WATER AND THAT ALSO GOES FOR ANY PETS.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 62 in the Moderate category measuring Particulate Matter at Amazon Park, Eugene. Data courtesy of Lane Regional Air Protection Agency (LRAPA)

Oakridge: The Air Quality Index is 95 in the Moderate category measuring Particulate Matter at Willamette Activity Center, Oakridge. Data courtesy of Lane Regional Air Protection Agency (LRAPA)

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

• Clear tonight,
• Sunny Monday AM, partly cloudy with a slight (20%) chance of dry thunderstorms in the afternoon, mostly cloudy with a slight (20%) chance of dry thunderstorms in the evening, mostly cloudy late Monday night and Tuesday AM,
• Mostly cloudy in the AM, partly cloudy and a bit cooler Tuesday afternoon, just partly cloudy Tuesday night,
• A mix of clouds and sun with a slight (20%) chance of showers Wednesday afternoon, mostly cloudy with a (30%) chance of showers, Wednesday night.
• lows 48-55 highs 93-77.
•  Mostly cloudy with a (30%) chance of showers Thursday and in the evening, a slight (20%) chance of showers late Thursday night,
• A mix of clouds and sun Friday with a slight (20%) chance of showers, partly cloudy with a slight (20%) chance of evening showers, partly cloudy late Friday night through Saturday night,
• Then a mostly sunny Sunday.
• highs 78-83 lows 54-52. (seasonal averages high 78 low 47).

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Forecast for the Umpqua Basin including Roseburg:

• Clear with patchy smoke late tonight,
• Sunny in the AM, partly cloudy with a slight (20%) chance of thunderstorms with patchy smoke Monday afternoon and evening, mostly clear late at night,
• AM clouds, partly cloudy and a bit cooler Tuesday afternoon, mostly clear in the evening, then mostly cloudy late Tuesday night,
• Partly cloudy in the AM, mostly cloudy with a (30%) chance of showers Wednesday afternoon, then mostly cloudy with a (40%) chance of showers Wednesday night.
• lows near 56 highs 95-82.
• Mostly cloudy with a (30%) chance of showers and a slight (20%) chance of thunderstorms Thursday and Thursday night,
• Mostly cloudy with a slight (20%) chance of showers Friday AM, sunny and warmer Friday afternoon,  mostly clear at night,
• Mostly sunny and warmer Saturday and Sunday, mostly clear Saturday night.
• highs 80-90 lows 56-54 warming back to 56 Saturday night. (seasonal averages high 79 low 52)

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

• Clear tonight,
• Partly cloudy in the morning with patchy coastal fog, then mostly cloudy Monday afternoon, mostly cloudy with patchy coastal fog late at night,
• Mostly cloudy Tuesday with areas of AM coastal fog, partly cloudy in the evening, mostly cloudy late Tuesday night,
• Mostly cloudy with a good (50%) chance of showers Wednesday and Wednesday night.
• lows 54-57 highs 68-65.
• Mostly cloudy with a good (50%) chance of showers Thursday and Thursday night,
• Mostly cloudy with a slight (20%) chance of showers Friday AM, partly cloudy Friday afternoon and at night,
•  Mostly sunny Saturday, mostly clear at night,
• Then partly cloudy Sunday.
• highs near 68 lows 56-54. (seasonal averages high 65 low 50)

Forecast for the Cascades in Lane County:

• Clear tonight,
• Sunny Monday AM, partly cloudy with a slight (20%) chance of dry thunderstorms in the afternoon, a slight (20%) chance of showers and dry thunderstorms in  the evening, partly cloudy late Monday night and Tuesday AM, mostly sunny in the afternoon, partly cloudy late Tuesday night,
• A mix of clouds and sun and cooler with a (30%) chance of showers Wednesday afternoon, mostly cloudy with a (40%) chance of showers and a slight (20%) chance of thunderstorms in the evening, then a (40%) chance of showers late Wednesday night.
• free air freezing level 13,000 ft. tonight and Monday, snow level above 8,000 ft. Monday night, free air freezing level 14,000 ft. Tuesday and Tuesday night, then snow level above 8,000 ft. Wednesday night.
• lows 44-50 cooling to 46 Wednesday night highs 86-74.
• Mostly cloudy with a (30%) chance of showers Thursday and in the evening, partly cloudy with a (30%) chance of showers late Thursday night,
• Partly cloudy with a slight (20%) chance of showers Friday and in the evening, partly cloudy Friday night and Saturday AM, mostly sunny in the afternoon and Sunday, mostly clear Saturday night.
• snow level above 8,000 ft. Wednesday through Friday night, free air freezing level 15,000 ft. Saturday and Saturday night, then 14,000 ft. Sunday.
• highs 65-73 lows 45-49.

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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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