______________

 

Check out my latest Eugene Daily News Weather Or Not Column The Poem Is Beautiful, But Trees Can Make Us Work Hard.

_____

And don’t forget my latest feature story in the continuing series on service club organizations called “Assistance” Is Their First Name.

 

________________

Here is my weekly weather quiz question for the last time. What is a “ Lifted Index?”  Here is the correct answer. Lifted Index (abbrev. LI)- A common measure of atmospheric instability. Its value is obtained by computing the temperature that air near the ground would have if it were lifted to some higher level (around 18,000 feet, usually) and comparing that temperature to the actual temperature at that level. Negative values indicate instability – the more negative, the more unstable the air is, and the stronger the updrafts are likely to be with any developing thunderstorms. However there are no “magic numbers” or threshold LI values below which severe weather becomes imminent. I’ll have a new weekly weather 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.

 

________________

 

An upper level low pressure trough  (Shaded “U” shape with blue arrows) continues to move through the Pacific Northwest. A strong frontal system pushed through bringing more showers.  Another frontal system will move toward Oregon next Friday returning another chance of rain.

 

________________

 

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 11 in the Good category measuring Particulate Matter at Springfield City Hall. Data courtesy of Lane Regional Air Protection Agency (LRAPA) Oakridge:

The Air Quality Index is 14 in the Good category measuring Particulate Matter at Willamette Activity Center, Oakridge. Data courtesy of Lane Regional Air Protection Agency (LRAPA)

 

________________

 

Home Wood Heating Advisory:

Eugene/Springfield: GREEN – burning is allowed.

Oakridge:  GREEN – burning is allowed.

(The use of Pellet stoves is always allowed.)

Advisory Courtesy of Lane Regional Air Protection Agency (LRAPA)

 

________________

 

Advisories:

• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 9 PM TODAY FOR THE NORTHERN OREGON CASCADES AND THE CASCADES IN LANE COUNTY.
• A HIGH WIND WARNING IS IN EFFECT UNTIL 1 PM TODAY FOR NORTHERN AND EASTERN KLAMATH COUNTY, WESTERN, CENTRAL AND EASTERN LAKE COUNTY.
• THE HEALTH ADVISORY FOR THE PRESENCE OF BLUE-GREEN ALGAE WILLOW CREEK RESERVOIR IN MORROW COUNTY HAS BEEN DISCONTINUED. WATER MONITORING CONFIRMED REDUCED LEVELS OF BLUE-GREEN ALGAE AND THEIR TOXINS.
• A HEALTH ADVISORY CONTINUES FOR THE PRESENCE OF BLUE-GREEN ALGAE  40 MILES SW OF BEND, FOR TENMILE LAKES IN COOS COUNTY, AND AT DEVILS LAKE IN LINCOLN COUNTY. THE TOXIC ALGAE BLOOM MEANS THAT PEOPLE SHOULD NOT DRINK OR HAVE DIRECT CONTACT WITH THE AFFECTED WATER AND THAT ALSO GOES FOR ANY PETS.

 

________________

 

Your Saturday College Football Weather Forecasts:

Ducks vs Colorado at Autzen Stadium Kickoff 1:30 PM: Mostly cloudy with showers,possible afternoon thunderstorm 45 slowly warming to near 50 by the end of the game, wind SW 5-15 mph.

_____

Beavers vs Washington at Husky Stadium Seattle, Washington Kickoff 7:30 PM: Mostly cloudy with a chance of rain, 46 with steady temperatures through the end of the game, wind S 5 mph.

 

_______________

 

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

• Mostly cloudy with showers today and a slight (20%) chance of afternoon and evening thunderstorms (0.25 in. of rain possible, small hail possible), a good (50%) chance of showers late tonight (0.15 in. of rain possible),
• Cloudy with a slight (20%) chance of AM rain, a good (50%) chance of rain Sunday afternoon (0.10 in. of rain possible), mostly cloudy with a good (50%) chance of rain Sunday night (under 0.10 in. of rain possible),
• Mostly cloudy with a (40%) chance of rain Monday and Monday night.
• highs 54-52 lows near 40.
• Mostly cloudy with a good (50%) chance of rain Tuesday, a slight (20%) chance of rain Tuesday night and Wednesday, a good (50%) chance of rain Wednesday night,
• A (40%) chance of showers Thursday (Thanksgiving Day), a (30%) chance of showers at night,
• Then mostly cloudy with a (40%) chance of rain Friday.
• highs 54-50 lows near 42. (seasonal averages high 50 low 37).

 

_________________

 

Forecast for the Umpqua Basin including Roseburg:

• Rain with a slight (20%) chance of thunderstorms this AM, showers this afternoon (0.25 in. of rain possible), showers likely (70%) this evening, a good (50%) chance of showers late Saturday night (0.10 in. of rain possible),
• Cloudy with a (30%) chance of showers Sunday (0.10 in. of rain possible), a slight (20%) chance of evening showers,  a slight (20%) chance of showers late Sunday night (under 0.10 in. of rain possible),
• Mostly cloudy with AM fog, a (40%) chance of rain Monday, then a slight (20%) chance of rain with patchy fog late at night.
• highs near 52 lows 43-40 warming to 43 Monday night.
• Mostly cloudy with patchy fog and a slight (20%) chance of rain Tuesday, mostly cloudy with patchy fog Tuesday night and Wednesday, mostly cloudy with a slight (20%) chance of rain Wednesday night and Thursday (Thanksgiving Day) and Thursday night,
• Then mostly cloudy with a (40%) chance of rain Friday.
• highs 55-52 Thursday lows near 42. (seasonal averages high 51 low 40)

 

________________

 

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

• Mostly cloudy with rain and a slight (20%) chance of AM thunderstorms, showers this afternoon (0.35 in. of rain possible), evening showers likely (60%), a good (50%) chance of showers late Saturday night (0.15 in. of rain possible),
• Cloudy with patchy AM fog, a slight (20%) chance of showers Sunday (0.15 in. of rain possible), mostly cloudy with a slight (20%) chance of evening showers, a slight (20%) chance of rain at night (under 0.10 in. of rain possible),
• Rain likely (60%) Monday, then mostly cloudy with a good (50%) chance of rain at night and patchy fog late.
• highs near 55 lows 53-47.
• Mostly cloudy with patchy AM fog and a (40%) chance of rain Tuesday AM, a slight (20%) chance of rain with patchy fog late at night,
• Mostly cloudy with patchy fog Wednesday, a good (50%) chance of rain with patchy fog Wednesday night,
• Patchy fog with a (40%) chance of rain Thursday (Thanksgiving Day), then mostly cloudy with a good (50%) chance of rain Thursday night and Friday.
• highs 57-54 lows near 49. (seasonal averages high 54 low 42)

 

________________

 

Forecast for the Cascades in Lane County:

• Mostly cloudy with rain and snow showers today (0.75 in. of rain possible, 4-8 in. of snow possible), colder with rain and snow showers tonight (0.25 in. of rain possible, 1-3 in. of snow possible).
• Cloudy with a good (50%) chance of rain and snow Sunday, rain and snow showers in the afternoon (0.10 in. of rain possible), mostly cloudy with a good (50%) chance of rain and snow Sunday night,
• Mostly cloudy with a good (50%) chance of rain and snow Monday, then a good (50%) chance of rain Monday night.
• snow level 3,500 ft. today through Sunday, 4,500 ft. Sunday night, 5,500 ft. Monday, then 8,000 ft. Monday night.
• highs 35-33 warming to 39 Monday lows 28-33 warming to 39 Monday night.
• Mostly cloudy with a (40%) chance of rain Tuesday, mostly cloudy with a slight (20%) chance of rain Tuesday night through Wednesday night,
• A (30%) chance of showers Thursday (Thanksgiving Day), a slight (20%) chance of showers at night,
• Then mostly cloudy with a (40%) chance of rain Friday.
• snow level 7,500 ft. Tuesday, 8,000 ft. Tuesday night, 6,000 ft. Wednesday, 7,000 ft. Wednesday night, 6,500 ft. Thursday, 6,000 ft. Thursday night, then 6,500 ft. Friday.
• highs 42-39 warming back to 42 Friday lows 33-30.

 

________________

 

**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.

 

________________