Here is my new weekly weather quiz question. What is “Alluvium?”  Please remember to post your answer at the bottom of this page. An email will not suffice. The first person to post the correct answer will win a week of free personalized weather forecasts tailored to your needs.  Good luck.

________________

An upper level low pressure trough (Shaded “U” shape area with blue arrows) is sending more storms our way.  A frontal system will push into the Pacific Northwest today as you can see on the days 1,2 & 3 graphic. The graphic for days 3-7 shows the typical parade of storms that bring our Autumn rain. There will be continued snow on the Cascade Passes but snow levels will continue to rise and fall. Willamette Pass is open. Hoodoo ski area plans to open today. Mt. Ashland announced Wednesday that they are starting their ski season early- this Sunday December 4th. It looks like the ski season has a good chance of starting reasonably early this year. For mountain snow conditions check out their websites or give them a call.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 19 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 17 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 15 in the Good category measuring Particulate Matter.

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

________________

Home Wood Heating Advisory:

Eugene-Springfield: GREEN – Burning is Allowed.

Oakridge: GREEN – Burning is Allowed.

*Note: Pellet stoves may be used anytime if they produce no visible emissions.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

________________

Advisories:

• A WINTER WEATHER ADVISORY IS IN EFFECT FROM 1 AM UNTIL 4 PM SUNDAY FOR THE NORTHERN OREON CASCADES AND FRIOM 4 AM UNTIL 4 PM FOR THE CASCADES IN LANE COUNTY.
• A HIGH SURF ADVISORY IS IN EFFECT FROM 2 AM UNTIL NOON TODAY FOR THE NORTH OREGON COAST AND THE CENTRAL OREGON COAST.
• A BEACH HAZARD STATEMENT IS IN EFFECT UNTIL 4 PM TODAY FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST. THAT MEANS LARGE BREAKERS ARE EXPECTED MOST OF THE DAY ON SATURDAY WITH HIGHEST POTENTIAL FOR DANGEROUS WAVE RUNUP ON BEACHES LATE SATURDAY AFTERNOON. JETTIES AND SURF ZONES WILL BE ESPECIALLY DANGEROUS.
• A Permanent Health Advisory remains for the South Umpqua River and Lawson Bar. Pools in the bedrock along the rivers edge are known to develop Blue-green Algae (cyanobacterial) blooms that can be harmful to pets and people if accidental ingestion occurs. Signs have been posted along several access areas along the river.
• A Blue-Green Algae Health Advisory remains in effect for Agency Lake. Agency Lake is located just north of Upper Klamath Lake near Klamath Falls along Highway 97 in Klamath County. Water monitoring on the lake has confirmed the presence of high levels of blue-green algae and associated toxins that can be harmful to people and animals. Swallowing water while swimming or inhaling water droplets as a result of high-speed water activities, such as water skiing and power boating, should be avoided in areas where blooms are identified. Although toxins are not absorbed through the skin, contact with cells from a bloom can cause skin irritation and a red, puffy rash in individuals with skin sensitivities, or those who develop rashes easily.

________________

 

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

• Mostly cloudy with sun breaks and a slight (20%) chance of showers and a bit warmer today (under 0.10 in. of rain possible), cloudy with a (30%) chance of evening rain, rain late tonight (0.25 in. of rain possible),
• Mostly cloudy with rain and a bit cooler Sunday (0.50 in. of rain possible), a good (50%) of evening showers, a good (50%) chance of rain or snow showers and colder late Sunday night,
• Mostly cloudy with AM rain and snow, rain likely (70%) Monday afternoon (snow level 1,500 ft.), then rain and snow showers likely (70%) at night.
• highs 52-40 lows 44-32.
• Mostly cloudy and a bit cooler with a slight (20%) chance of rain or snow showers Tuesday, just mostly cloudy Tuesday night,
• A mix of clouds and sun and a bit cooler Wednesday, becoming cloudy with a (30%) of  freezing rain Wednesday night,
• Cloudy and a bit warmer with rain likely (70%) and a slight (20%) chance of rain or freezing rain Thursday, rain likely (70%) at night,
• Then mostly cloudy with showers likely (70%) and a bit warmer Friday.
• highs 40-38 warming to 47 Friday lows 28-38. (seasonal averages high 47 low 35)

 

_____________________

 

Forecast for Roseburg:

• Mostly cloudy with a slight (20%) chance of showers and a bit warmer today, cloudy with a (30%) chance of rain tonight,
• Cloudy with AM showers, rain and a bit cooler Sunday afternoon, evening showers likely (70%), a good (50%) chance of rain and snow showers and colder at night (snow level 2,500 ft. falling to 2,000 ft.),
• Cloudy with rain and snow showers likely (70%) Monday AM, a bit cooler with rain and snow showers in the afternoon, then rain and snow showers Monday night.
• highs 52-43 lows 42-35.
• Mostly cloudy and a bit cooler with a (40%) chance of rain and snow showers Tuesday, just mostly cloudy with patchy fog at night and Wednesday AM, mostly cloudy and a bit warmer Wednesday afternoon, a slight (20%) chance of rain Wednesday night,
• Cloudy with a (40%) chance of rain and a slight (20%) chance of light freezing rain Thursday AM, a bit warmer with a good (50%) chance of afternoon rain, rain likely (70%) Thursday night,
• Then cloudy and a bit warmer with showers likely (70%) Friday.
• highs 39-52 lows 28-43. (seasonal averages high 49 low 38)

 

________________

 

Forecast for The South Oregon Coast Including Coos Bay and North Bend:

• Mostly cloudy and a bit warmer with a slight (20%) chance of coastal showers today while a slight (20%) chance of inland AM showers today (under 0.10 in. of rain possible), cloudy with a slight (20%) chance of evening coastal showers and coastal rain late tonight while a (40%) chance of inland rain tonight (under 0.10 in. of rain possible),
• Mostly cloudy with AM showers, rain and a bit cooler Sunday afternoon, cloudy with evening showers likely (70%), a (30%) chance of showers late Sunday night (snow level 2,000 ft. late at night),
• Mostly cloudy with showers likely (70%) in the AM (snow level 2,000 ft.), showers and a bit cooler Monday afternoon and evening, then rain and snow showers Monday night.
• highs 54-47 lows 46-38.
• Mostly cloudy with a (40%) chance of rain and snow showers Tuesday, patchy fog late Tuesday night,
• Areas of AM fog, just mostly cloudy and a bit warmer Wednesday, a good (50%) chance of rain at night,
• Cloudy and a bit warmer with a good (50%) chance of rain Thursday, rain likely (70%) and windy Thursday night,
• Then showers likely (70%) and a bit cooler Friday.
• highs 47-55 cooling to 52 Friday lows 38-46. (seasonal averages high 52 low 40)

 

________________

 

Forecast for the Cascades in Lane County:

• Mostly cloudy with a (40%) chance of scattered AM rain and snow showers, a slight (20%) chance of isolated rain and snow showers this afternoon (under 0.10 in. of rain possible), cloudy with a slight (20%) chance of rain and snow this evening, snow and rain late tonight (0.25 in. of rain possible, 1-2 in. of snow possible),
• Mostly cloudy with rain and snow and a bit cooler Sunday (6-12 in. of snow possible), cloudy with evening snow showers likely (70%), a good (50%) chance of rain and snow showers late Sunday night,
• Cloudy with a good (50%) chance of AM snow, snow and a bit cooler Monday afternoon, then snow showers at night.
• snow level 4,000 ft. today, 3,500 ft. Saturday night, 4,500 ft. Sunday, 2,500 ft. Sunday evening,  then at the surface Monday and  Monday night.
• highs 36-26 lows 28-15.
• Mostly cloudy and a bit cooler with a (30%) chance of snow showers Tuesday, just mostly cloudy at night,
• A mix of clouds and sun and a bit warmer Wednesday, becoming cloudy with a slight (20%) chance of snow or freezing rain Wednesday night,
• Snow and rain likely (70%) or freezing rain in the AM, rain and snow Thursday afternoon, rain and snow at night,
• Then rain and snow showers likely (70%) Friday.
• snow level at the surface Tuesday, free air freezing level at the surface Tuesday night and Wednesday, snow level at the surface Wednesday night, 3,000 ft. Thursday, 5,500 ft. Thursday night, then 3,500 ft. Friday.
• highs 24- 33 cooling to 30 Friday lows 14-29.

________________

**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.

__________