Here is my weekly weather quiz question. What is  “orographic lifting?” 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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Short-lived high pressure (Shaded “Arch” shape with blue arrows) will take over for just one day. Then low pressure (Shaded “U” shape with blue arrows) takes over sending a frontal system into Oregon (Position shown is Sunday). It looks like you could get wet at either of the home football games Saturday whether you are in Autzen Stadium or Reser Stadium.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 85 in the Moderate category measuring Particulate Matter.

Oakridge: The Air Quality Index is 34 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 58 in the Moderate category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA).

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Advisories:

• A FREEZE WARNING IS IN EFFECT FROM 10 PM TONIGHT UNTIL 9 AM FRIDAY FOR EASTERN CURRY COUNTY, JOSEPHINE COUNTY, AND JACKSON COUNTY.
• A FROST ADVISORY IS IN EFFECT  FROM 10 PM TONIGHT UNTIL 9 AM FRIDAY FOR EASTERN CURRY COUNTY, JOSEPHINE COUNTY, AND JACKSON COUNTY.
• A HEALTH ADVISORY HAS BEEN LIFTED FOR THE CLACKAMAS COVE PORTION OF THE CLACKAMAS  RIVER IN CLACKAMAS COUNTY. WATER MONITORING TESTS PROVIDED BY THE USGS HAVE CONFIRMED THAT THE BLUE-GREEN ALGAE TOXINS ARE NO LONGER PRESENT.
• A HEALTH ADVISORY CONTINUES FOR SUNSET BAY STATE PARK BEACH LOCATED IN COOS COUNTY FOR HIGHER-THAN-NORMAL FECAL BACTERIA WHICH CAN RESULT IN DIARRHEA, STOMACH CRAMPS, SKIN RASHES, UPPER RESPIRATORY INFECTIONS AND OTHER ILLNESSES. DIRECT CONTACT WITH THE WATER – ESPECIALLY BY CHILDREN AND THE ELDERLY, WHO MAY BE VULNERABLE TO WATERBORNE BACTERIA – SHOULD BE AVOIDED IN THIS AREA UNTIL THE ADVISORY IS LIFTED. VISITORS SHOULD AVOID WADING IN NEARBY CREEKS, POOLS OF WATER ON THE BEACH, OR IN DISCOLORED WATER AND STAY CLEAR OF WATER RUNOFF FLOWING INTO THE OCEAN.

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

• Mostly cloudy with areas of fog late tonight and Friday AM, mostly cloudy in the afternoon, partly cloudy in the evening, mostly cloudy late Friday night,
• Mostly cloudy with a good (50%) chance of rain Saturday AM, rain in the afternoon and evening, showers late Saturday night,
• Then mostly cloudy and a bit cooler with showers likely (70%) Sunday and Sunday night.
• lows 38-45 cooling back to 38 Sunday night highs 56-58 cooling to 54 Sunday.
• A mix of clouds and sun and a bit cooler with a good (50%) chance of showers Monday, mostly cloudy with (30%) chance of showers at night,
• A mix of clouds and sun Tuesday, mostly cloudy with a slight (20%) chance of rain Tuesday night,
• Mostly cloudy and just a bit warmer with a (40%) chance of rain Wednesday (Veterans Day) and at night,
• Then mostly cloudy with a good (50%) chance of rain Thursday.
• highs 52-54 lows 37-43. (seasonal averages high 55 low 39)

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Your Saturday College Football Forecast:

Ducks vs California at Autzen Stadium– Kickoff 7:30 PM PST: Mostly cloudy with rain 54 cooling slowly as the game progresses, wind S 5-10 mph.

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Beavers vs UCLA at Riser Stadium- Kickoff 1:30 PM PST: Mostly cloudy with rain likely, 52 warming to 58 as the game progresses, then cooling, wind S 5-10 mph.

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Forecast for Roseburg:

• Mostly cloudy with areas of  fog late tonight and Friday AM, partly cloudy in the afternoon and Friday night,
• Mostly cloudy with a slight (20%) chance of rain Saturday AM, rain in the afternoon and evening, showers late Saturday night and Sunday AM, showers and colder with a slight (20%) chance of thunderstorms in the afternoon and evening, showers likely (70%) late Sunday night.
• lows 42-46 cooling to 40 Sunday night highs 60-62 cooling 54 Sunday.
• Mostly cloudy and a bit cooler with showers likely (70%) Monday, partly cloudy with a (40%) chance of showers Monday night,
• Just mostly cloudy Tuesday, partly cloudy with a slight (20%) chance of showers Tuesday night,
• Mostly cloudy with a (40%) chance of rain Wednesday (Veterans Day) and Wednesday night,
• Then mostly cloudy with a (30%) chance of showers Thursday.
• highs 52-54 lows 38-42. (seasonal averages high 57 low 42)

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

• Mostly cloudy with areas of fog late tonight and Friday AM, partly cloudy in the afternoon and evening, mostly cloudy late Friday night,
• Mostly cloudy with a (40%) chance of AM rain, rain and a bit cooler Saturday afternoon and evening, showers late Saturday night and Sunday AM, showers and colder with a slight (20%) chance of thunderstorms in the afternoon and evening, then showers likely (70%) Sunday night.
• lows 46-50 cooling to 45 Sunday night highs 62-53.
• Mostly cloudy with showers likely (70%) Monday, partly cloudy with a slight (20%) chance of showers Monday night,
• Just partly cloudy Tuesday, becoming mostly cloudy with a slight (20%) chance of rain Tuesday night,
• Mostly cloudy with a (40%) chance of rain Wednesday (Veterans Day) and a good (50%) chance of rain at night,
• Then mostly cloudy with a good (50%) chance of showers Thursday.
• highs 54-56 lows 42-45. (seasonal averages high 57 low 44).

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Forecast for the Cascades in Lane County:

• Mostly cloudy with a slight (20%) chance of evening rain and snow showers, partly cloudy late tonight through Friday night,
• Mostly cloudy with a slight (20%) chance of AM rain, rain likely (70%) and a bit warmer Saturday afternoon, rain in the evening, showers late at night,
• Mostly cloudy and colder with rain and showers likely (70%) Sunday and Sunday night.
• snow level 5,000 ft. tonight, free air freezing level 7,500 ft. Friday, 10,000 ft. Friday night, snow level 8,000 ft. Saturday, 7,500 ft. falling to 5,000 ft. late Saturday night, 4,500 ft Sunday, then 4,000 ft. Sunday night.
• lows 26-32 cooling to 23 Sunday night highs 47-50 cooling to 36 Sunday.
• Mostly cloudy and a bit cooler with rain and snow showers likely (60%) Monday, a (30%) chance of rain and snow showers Monday night,
• Partly cloudy Tuesday, partly cloudy with a slight (20%) chance of rain and snow at night,
• Mostly cloudy and warmer with a good (50%) chance of rain and snow showers Wednesday (Veterans Day) and (a bit cooler) Thursday, mostly cloudy with a (40%) chance of rain and snow Wednesday night.
• snow level 5,000 ft. Sunday, 4,000 ft. Sunday night, 3,500 ft. Monday, 3,000 ft. Monday night, free air freezing level 4,000 ft. Tuesday, snow level 3,500 ft. Tuesday night, 5,000 ft. Wednesday and Wednesday night, then 4,500 ft. Thursday.
• highs 36-42 cooling to 38 Thursday lows 22-27.

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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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