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Here is my new weekly weather quiz question. What is the first rule when driving in fog?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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Advisories:

• A DENSE FOG ADVISORY IS IN EFFECT UNTIL NOON TODAY FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, AND JACKSON COUNTY.
• AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL 4 AM THURSDAY FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, THE EASTERN DOUGLAS COUNTY FOOTHILLS, JACKSON COUNTY, THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, WESTERN, CENTRAL AND EASTERN LAKE COUNTY.
• A Blue-Green Algae warning  has been cancelled for Tenmile Lakes in Coos County, but continues for Fern Ridge Reservoir, Lost Creek Lake, and Willow Creek Reservoir (NE Oregon). Water monitoring has confirmed the presence of blue-green algae that can produce toxins, state public health officials said. The algae levels are likely associated with dangerous cyanotoxin concentrations in the water that can be harmful to humans and animals. Swallowing or inhaling water droplets, as well as skin contact with water, should be avoided according to the authorities.

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The upper airflow has become a ridge of high pressure that will keep us mild for a while.  A weak frontal system fell apart as it slid through Oregon giving us the chance of showers. The snow is still present in the hills, but it is melting away slowly.

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Air Quality Index:

Eugene-Springfield: The Pollution Index is 41 in the Good category measuring Particulate Matter at Amazon Park, Eugene. Data courtesy of Lane Regional Air Protection Agency (LRAPA)

Oakridge: The Pollution Index is 53 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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Home Wood Heating Advisory:

Eugene/Springfield: (YELLOW) Burning Cautioned Against.

Oakridge: (YELLOW) Burning Cautioned Against.

Pellet stoves are always allowed.

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

• Mostly cloudy with areas of patchy fog today, partly cloudy this evening, patchy fog and freezing fog late tonight,
• Patchy AM fog with possible freezing fog, mostly cloudy Tuesday afternoon, mostly cloudy with patchy fog and a slight (20%) chance of rain or drizzle late Tuesday night (under 0.10 in. of rain possible),
• Cloudy with a good (50%) chance of rain or drizzle Wednesday (0.10 in. of rain possible), a (40%) chance of evening rain, then a good (50%) chance of showers Wednesday night.
• highs near 44 lows 32-35 cooling to near 30 Wednesday night.
• Mostly cloudy with areas of fog Thursday, a slight (20%) chance of rain at night,
• Mostly cloudy with a (40%) chance of rain Friday, cloudy with a good (50%) chance of rain Friday night and Saturday, a (30%) chance of rain Saturday night,
• Then cloudy with a (40%) chance of rain Sunday.
• highs 39-45 lows 30-36. (seasonal averages high 45 low 34).

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

• Partly cloudy with patchy AM fog, partly cloudy this afternoon and tonight with patchy coastal fog late at night,
• Patchy AM coastal fog, partly cloudy Tuesday, mostly cloudy with a slight (20%) chance of rain late Tuesday night (under 0.10 in.(0.10 in. of rain possible), showers likely (60%) in the evening, rain and snow showers and colder late Wednesday night,
• highs 55-48 lows 36-40 cooling to near 35 Wednesday night.
• Mostly cloudy with a slight (20%) chance of rain and snow showers Thursday, just mostly cloudy at night,
• Mostly cloudy with a (40%) chance of rain and snow showers Friday AM, a (40%) chance of showers in the afternoon, mostly cloudy with a good (50%) chance of rain Friday night and Saturday, then mostly cloudy with a slight (20%) chance of rain Saturday night and Sunday.
• highs 48-54 lows 34-40. (seasonal averages high 51 low 39)

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Forecast for the Cascades of Lane County:

• Partly cloudy today through Tuesday evening, mostly cloudy with a slight (20%) chance of rain in the evening, mostly cloudy with a slight (20%) chance of rain late Tuesday night,
• Cloudy with rain and snow likely (60%) and colder Wednesday, then snow likely (60%) Wednesday night.
• free air freezing level 7,500 ft. today, 10,000 ft. tonight and Tuesday, snow level 8,000 ft. Tuesday night, 5,500 ft. Wednesday, then at the surface Wednesday night.
• highs 50-35 lows 37-18.
• Mostly cloudy with a slight (20%) chance of snow showers Thursday, a slight (20%) chance of snow at night,
• Mostly cloudy with a (40%) chance of rain and snow Friday, cloudy with a good (50%) chance of rain likely (60%) Friday night,
• Cloudy with a (40%) chance  of rain Saturday, a (30%) chance of rain and snow Saturday night,
• Then cloudy with a (40%) chance of rain Sunday.
• snow level at the surface Thursday, free air freezing level at the surface Thursday night,   snow level 4,000 ft. Friday, 6,000 ft. at night, 7,000 ft. Saturday, 6,000 ft. Saturday night, then 7,000 ft. Sunday.
• highs 26-39 lows 19-29.