Here is my new 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.

________________

An upper level low (“Shaded “U” shape with blue arrows) moved through the Pacific Northwest giving us showers and cool temperatures.  Short-lived high pressure (Shaded “Arch” shape with blue arrows on previous graphic) moved in for Wednesday, now low pressure returns the chance of rain. A frontal system will approach the coast by Saturday increasing our rain chance even more. It looks like you could get wet at both of the home football games Saturday whether you are in Autzen Stadium or Reser Stadium.

_______________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 40 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 33 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).

________________

Advisories:

• A FROST ADVISORY IS IN EFFECT UNTIL 8 AM TODAY 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.

________________

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

• Cloudy with a good (50%) chance of occasional AM rain, a bit warmer and scattered showers likely (70%) this afternoon (under 0.10 in. of rain possible), mostly cloudy with areas of fog late tonight,
• Mostly cloudy with areas of AM fog, mostly cloudy and a bit cooler Friday afternoon, becoming cloudy late Friday night,
• Cloudy with a good (50%) chance of rain Saturday AM, rain likely (70%) and warmer in the afternoon, rain in the evening, then showers late Saturday night.
• highs 55-52 warming to 58 Saturday lows 37-46.
• Cloudy and a bit cooler with showers likely (60%) Sunday and Sunday night,
• A mix of clouds and sun with a good (50%) chance of showers Monday, a slight (20%) chance of showers at night,
• A mix of clouds and sun Tuesday, mostly cloudy Tuesday night,
• Then mostly cloudy and just a bit warmer with a (30%) chance of rain Wednesday (Veterans Day).
• highs 52-54 lows 42-40. (seasonal averages high 56 low 39)

_____

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.

_____

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.

________________

Forecast for Roseburg:

• Cloudy with scattered showers and patchy fog this AM, a (40%) chance of showers this afternoon (under 0.10 in. of rain possible), mostly cloudy this evening, partly cloudy with patchy fog again late tonight,
• Patchy AM fog,  partly cloudy and a bit warmer Friday and Friday night,
• Mostly cloudy with a slight (20%) chance of AM rain, then rain and a bit warmer Saturday afternoon and Saturday night.
• highs 58-64 lows 42-47.
• Cloudy and cooler with showers likely (70%) Sunday and at night,
• Cloudy and a bit cooler with showers likely (70%) Monday, partly cloudy with a slight (20%) chance of showers Monday night,
• Just mostly cloudy Tuesday, then partly cloudy Tuesday night and Wednesday (Veterans Day).
• highs 56-54 lows 42-40. (seasonal averages high 57 low 42)

________________

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

• Mostly cloudy with coastal showers likely (70%) this AM and scattered afternoon showers while AM scattered showers inland and isolated showers this afternoon (under 0.10 in. of rain possible), mostly cloudy with patchy fog late tonight,
• Patchy AM fog, partly cloudy Friday and in the evening, mostly cloudy late Friday night,
• Then mostly cloudy with a (40%) chance of AM rain, rain and a bit cooler Saturday and Saturday night.
• highs 60-62 lows 46-50.
• Mostly cloudy with showers and a bit cooler Sunday, showers likely (60%) Sunday night,
• Cloudy with showers likely (70%) Monday, partly cloudy with a slight (20%) chance of showers Monday night,
• Just partly cloudy Tuesday and Tuesday night,
• Then mostly cloudy with a slight (20%) chance of rainWednesday (Veterans Day).
• highs near 56 lows near 43. (seasonal averages high 57 low 44).

________________

Forecast for the Cascades in Lane County:

• Cloudy with a good (50%) chance of rain and snow this AM, a bit cooler with a good (50%) chance of scattered rain and snow showers this afternoon, mostly cloudy with a slight (20%) chance of evening showers, partly cloudy late tonight through Friday night,
• Mostly cloudy with a slight (20%) chance of AM rain, rain likely (70%) Saturday afternoon, rain in the evening, showers late at night.
• snow level 4,500 ft. today, 5,500 ft. tonight, free air freezing level 6,500 ft. Friday, 9,000 ft. Friday night, snow level 8,000 ft. Saturday, then 7,500 ft. falling to 5,500 ft. late Saturday night.
• highs 40-50 lows 26-35.
• Mostly cloudy and cooler with showers likely (70%) Sunday and Sunday night,
• Mostly cloudy and a bit cooler with a good (50%) chance of rain and snow showers Monday, a (30%) chance of rain and snow showers Monday night,
• A mix of clouds and sun Tuesday, then partly cloudy Tuesday night,
• Then mostly cloudy and warmer Wednesday (Veterans Day).
• snow level 5,000 ft. Sunday, 4,000 ft. Sunday night, 3,500 ft. Monday and Monday night, free air freezing level 4,500 ft. Tuesday and Tuesday night, then snow level 4,000 ft. Wednesday.
• highs 36-42 lows 27-22.

________________

**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.

________________

Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

________________