Here is my weekly weather quiz question. What is  “Anomalous Propagation?” Please remember to post your answer at the bottom of this page. The first person to post the correct answer will win a week of free personalized weather forecasts tailored to your needs.  Good luck.

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An Upper Level Low Pressure Trough (Shaded “U” shape with blue arrows) has changed our weather and toward the end of the workweek we’ll get colder on the backside of that low with Northwesterly airflow. The graphic for days 1-3 shows the frontal system moving through the Pacific Northwest. The graphic for days 3-7 shows no particular surface fronts for the week until next Sunday into Monday. For mountain snow conditions at the local ski areas check out their websites or give them a call.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 16 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 11 in the good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 1 in the Good category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

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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)

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Advisories:

• A FLOOD WARNING REMAINS IN EFFECT FOR THE TUALATIN RIVER AT FARMINGTON AND THE PUDDING RVER AT AURORA.
•  A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 PM THIS EVENING FOR THE CASCADES IN LANE COUNTY, THE SOUTHERN OREGON CASCADES, AND THE SISKIYOU MOUNTAINS.
• A WINTER WEATHER ADVISORY IS IN EFFECT FROM 10 PM TONIGHT UNTIL 10 AM WEDNESDAY FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, JACKSON COUNTY
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 AM WEDNESDAY FOR THE EASTERN DOUGLAS COUNTY FOOTHILLS, AND THE SOUTH CENTRAL OREGON CASCADES.
• A Permanent Health Advisory remains in effect 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.

 

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

• Mostly cloudy with a slight (20%) chance of isolated evening showers, a slight (20%) chance of rain and snow showers late tonight (0.10 in. of rain possible, snow level 1,500 ft.),
• Mostly cloudy with a (30%) chance of AM showers, showers likely (70%) and a bit cooler Wednesday afternoon (0.10 in. of rain possible), rain and snow showers likely (70%) Wednesday night (0.10 in. of rain possible, snow level 1,000 ft.),
• Mostly cloudy with a slight (20%) chance of AM rain and snow showers, a good (50%) chance of rain and snow showers Thursday afternoon (snow level 1,000 ft.), and at night (snow level 1,000 ft.),
• Cloudy with a good (50%) chance of AM rain and snow showers, rain and snow showers likely (70%) Friday afternoon (snow level 1,000 ft.), then cloudy with a (40%) chance of rain and snow showers Friday night (snow level 1,000 ft.).
• lows 35-30 highs near 46.
• Mostly cloudy and a bit warmer with a slight (20%) chance of rain and snow showers Saturday (snow level 1,000 ft.), a slight (20%) chance of showers at night,
• Mostly cloudy and a bit cooler with a (40%) chance of rain and snow showers Sunday (snow level 1,000 ft.), a (40%) chance of showers Sunday night,
• A  good (50%) chance of rain and snow showers Monday (snow level 1,500 ft.), a (40%) chance of showers at night,
• Then cloudy and a bit warmer with a (40%) chance of showers Tuesday.
• highs 44-46 warming to 48 Tuesday lows 29-32 warming to 34 Monday night. (seasonal averages high 52 low 35)

 

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Forecast for Roseburg:

• Mostly cloudy with evening rain and snow showers likely (70%), a good (50%) chance rain and snow showers late tonight (under 0.10 in. of rain possible, 1-2 in. of snow possible, snow level 2,500 ft.),
• Cloudy with a good (50%) chance of AM rain and snow showers, rain and snow showers likely (70%) and a bit cooler Wednesday afternoon (0.25 in. of rain possible, 1 in. of snow possible, snow level 1,000 ft. rising to 1,500 ft.), evening showers and snow showers with a slight (20%) chance of thunderstorms, rain and snow showers late Wednesday night (0.10 in. of rain possible, 1 in. of rain possible, snow level 1,000 ft. falling to 200 ft. late at night),
• Mostly cloudy with a (40%) chance of rain and snow showers Thursday (snow level 0 ft. rising to 1,500 ft.) and Thursday night (snow level 1,500 ft. falling to 700 ft. late at night),
• Cloudy with a (40%) chance of rain and snow showers Friday and Friday night.
• lows 35-30 warming to 33 Friday night highs near 44.
• Mostly cloudy and a bit warmer with a slight (20%) chance of rain and snow showers Saturday and Saturday night,
• Mostly cloudy with a good (50%) chance of rain and snow showers Sunday and at night,
• A (30%) chance of rain and snow showers and a bit warmer Monday and Monday night,
• Then mostly cloudy and a bit warmer with a slight (20%) chance of rain and snow showers Tuesday.
• highs 48-52 lows 32-35. (seasonal averages high 55 low 38)

 

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

• Mostly cloudy with a good (50%) chance of coastal showers and a slight (20%) chance of thunderstorms while inland evening showers likely (70%) and a inland rain and snow showers likely (70%) late at night (under 0.10 in. of rain possible, no snow accumulation expected, snow level 2,000 ft. late at night),
• Cloudy with a (30%) chance of coastal showers Wednesday AM and a slight (20%) chance of thunderstorms and coastal showers likely (70%) with a slight (20%) chance of thunderstorms and a bit cooler in the afternoon while a (30%) chance of AM inland rain and snow showers with inland rain and snow showers likely (70%) Wednesday afternoon (0.25 in. of rain possible, snow level 1,500 ft.), cloudy with evening coastal showers and a slight (20%) chance of thunderstorms while evening inland showers and snow showers with a slight (20%) chance of thunderstorms, rain and snow showers likely (70%) late at night (0.25 in. of rain possible, 1 in. of snow possible, snow level 900 ft.),
• Mostly cloudy with a (40%) chance of coastal showers while a (30%) chance of inland rain and snow showers and a bit warmer Thursday (snow level 100 ft. rising to 1,500 ft. in the afternoon), a (30%) chance of coastal showers while a (30%) chance of inland rain and snow showers Thursday night (snow level 1,500 ft. falling to 1,000 ft.),
• Cloudy with a good (50%) chance of AM rain and snow showers, rain and snow showers likely (70%)  Friday afternoon, evening showers likely (70%), then a (40%) chance of rain and snow showers late Friday night.
• lows 39-35 warming to 37 Friday night highs near 46.
• Mostly cloudy and a bit warmer with a slight (20%) chance of rain and snow showers Saturday and Saturday night,
• Mostly cloudy with a good (50%) chance of showers Sunday, a (40%) chance of rain and snow showers at night,
• Mostly cloudy with a (40%) chance of showers and a bit warmer Monday and Monday night,
• Then mostly cloudy and a bit warmer with a slight (20%) chance of showers Tuesday.
• highs 50-54 lows 36-40. (seasonal averages high 53 low 40)

 

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Forecast for the Cascades in Lane County:

• Mostly cloudy with evening rain and snow showers, snow showers and colder late tonight (0.25 in. of rain possible, 1-3 in. of snow possible),
• Mostly cloudy with a good (50%) chance of AM snow showers, snow showers likely (70%) and a bit cooler Wednesday afternoon (2 in. of snow possible), snow showers likely (70%) at night (2 in. of snow possible),
• Mostly cloudy and a bit cooler with a good (50%) chance of snow showers Thursday and at night,
• Then cloudy and a bit warmer with a good (50%) chance of snow showers Friday and Friday night.
• snow level 3,500 ft. this evening, at the surface late tonight through Wednesday night, 3,000 ft. Thursday afternoon, then at the surface Thursday night through Friday night.
• lows 21-15 warming to 18 Friday night highs 30-28 warming back to 30 Friday.
• Mostly cloudy and a bit warmer with a (30%) chance of snow showers Saturday, a slight (20%) chance of snow showers Saturday night,
• Mostly cloudy and a bit cooler with a good (50%) chance of snow showers Sunday, cloudy with a good (50%) snow showers at night,
• Mostly cloudy and a bit cooler with a good (50%) chance of snow showers Monday and Monday night,
• Then mostly cloudy and a bit warmer with a (40%) chance of snow showers Tuesday
• snow level at the surface Saturday through Tuesday.
• highs 33-30 warming to 34 Tuesday lows near 20.

 

 

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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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