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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 FREEZING FOG ADVISORY IS IN EFFECT UNTIL NOON WEDNESDAY FOR EASTERN CURRY COUNTY, JOSEPHINE COUNTY, AND JACKSON COUNTY.
• AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL 4 PM WEDNESDAY 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 milder for a while.   The inversion it is causing (warmer air trapped above the colder air) the dense fog that we’ve been seeing. A frontal system is on its way to the Pacific Northwest and will bring clouds and the chance of rain with it.

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Air Quality Index:

Eugene-Springfield: The Pollution Index is 29 in the Good category measuring Particulate Matter at Springfield City Hall. Data courtesy of Lane Regional Air Protection Agency (LRAPA)

Oakridge: The Pollution Index is 66 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 patchy fog and a (30%) chance of light rain or drizzle late tonight (under 0.10 in. of rain possible),
• Cloudy with a (40%) chance of light rain or drizzle Wednesday AM, rain likely (70%) in the afternoon (under 0.10 in. of rain possible), a good (50%) chance of rain and snow showers in the evening, a slight (20%) chance of snow showers Wednesday night (under 0.10 in. of rain possible),
• A mix of clouds and sun with areas of fog and freezing fog Thursday, mostly cloudy with a slight (20%) chance of rain and snow at night,
• Cloudy with a good (50%) chance of rain Friday AM (snow level 1,500 ft.), then rain likely (60%) in the afternoon and Friday night.
• lows 32-26 warming to 39 Friday night highs 44-38 warming to 43 Friday.
• Mostly cloudy with a good (50%) chance of rain Saturday, a (30%) chance of rain at night,
• Mostly cloudy with a slight (20%) chance of rain Sunday, cloudy with a (30%) chance of rain at night,
• Mostly cloudy with a (40%) chance of rain Monday, cloudy with a (30%) chance of rain at night,
• Then mostly cloudy with a slight (20%) chance of rain Tuesday.
• highs 47-50 cooling back to 47 Monday night lows near 38. (seasonal averages high 45 low 33).

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

• Partly cloudy this evening, mostly cloudy with a slight (20%) chance of coastal rain late tonight (under 0.10 in. of rain possible),
• Cloudy with a (30%) chance of AM rain, a (40%) chance of coastal afternoon showers while inland afternoon showers likely (60%) Wednesday (under 0.10 in. of rain possible), mostly cloudy with a (30%) chance of coastal showers while evening showers likely (60%) and a good (50%) chance of rain and snow showers late at night (under 0.10 in. of rain possible),
• Partly cloudy Thursday AM, becoming mostly sunny in the afternoon, partly cloudy in the evening, mostly cloudy Thursday night,
• Cloudy with a (40%) chance of AM rain, then rain likely (70%) Friday afternoon and Friday night.
• lows 34-45 highs 48-50.
• Mostly cloudy with a (40%) chance of showers Saturday, a slight (20%) chance of rain at night,
• Mostly cloudy with areas of AM fog, slight (20%) chance of rain Sunday and Sunday night,
• A slight (20%) chance of rain Monday and at night,
• Then areas of AM fog and mostly cloudy with a slight (20%) chance of rain Tuesday.
• highs 54-52 lows 42-39. (seasonal averages high 51 low 39)

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Forecast for the Cascades of Lane County:

• Partly cloudy this evening, mostly cloudy with a slight (20%) chance of rain or drizzle late tonight,
• Cloudy with AM rain and snow, rain and snow likely (60%) Wednesday afternoon (0.10 in. of rain possible, 2 in. of snow possible), a good (50%) chance of snow showers and colder Wednesday night,
• Partly cloudy Thursday and Thursday night,
• Mostly cloudy with a good (50%) chance of snow Friday AM, snow likely (60%) in the afternoon, then rain likely (70%) Friday night.
• snow level 6,500 ft. tonight, 4,000 ft. Wednesday, at the surface Wednesday night,  free air freezing level at the surface Thursday and Thursday night, 3,000 ft. Friday, then 6,000 ft. Friday night.
• lows 27-17 warming to near 30 Friday night highs 35-25 warming to 35 Friday.
• Mostly cloudy with a good (50%) chance  of rain Saturday, a slight (20%) chance of rain Saturday night through Sunday night,
• Mostly cloudy with a (40%) chance of rain Monday and Monday night,
• Then mostly cloudy with a slight (20%) chance of rain Tuesday.
• snow level 7,000 ft. Saturday, 5,500 ft. Saturday night, 6,500 ft. Sunday, 7,000 ft. Sunday night, 6,000 ft. Monday, 5,000 ft. Monday night, then 4,500 ft. Tuesday.
• highs 37-42 lows 29-32.