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 next frontal system moving through the Pacific Northwest today. 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 22 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 9 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.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 6 PM THIS EVENING FOR THE NORTHERN OREGON CASCADES.
•  A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 PM THIS EVENING FOR THE CASCADES IN LANE COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 PM THIS EVENING ABOVE 4,000 FT FOR THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES, AND THE SISKIYOU MOUNTAINS.
• A WIND ADVISORY IS IN EFFECT UNTIL 4 PM THIS AFTERNOON FOR THE KLAMATH BASIN.
• A HIGH WIND WARNING IS IN EFFECT UNTIL 4 PM THIS AFTERNOON FOR NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL AND EASTERN LAKE COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 4 PM THIS AFTERNOON FOR NORTHERN AND EASTERN KLAMATH COUNTY AND WESTERN LAKE COUNTY.
• 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 rain possibly heavy at times and a bit cooler this afternoon (0.50 in. of rain possible), a good (50%) chance of scattered evening showers, a good (50%) chance of isolated rain and snow showers late tonight (0.10 in. of rain possible),
• Mostly cloudy with a slight (20%) 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 (40%) chance of rain and snow showers and a bit cooler Thursday afternoon and at night (snow level 1,000 ft.).
• highs 48-45 lows 34-30.
• Cloudy and a bit cooler with a good (50%) chance of rain and snow showers Friday (snow level 1,000 ft.), a (40%) chance of rain and snow showers Friday night (snow level 1,000 ft.),
• A mix of clouds and sun and a bit warmer with a slight (20%) chance of rain and snow showers Saturday (snow level 1,000 ft.), just partly cloudy at night,
• A mix of clouds and sun with a slight (20%) chance of rain and snow showers Sunday (snow level 1,000 ft.), a (40%) chance of showers Sunday night,
• Then mostly cloudy with a good (50%) chance of rain Monday.
• highs 44-48 lows 29-32. (seasonal averages high 52 low 35)

 

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Forecast for Roseburg:

• Mostly cloudy and a bit cooler with rain and snow showers this afternoon (0.50 in. of rain possible, snow level 3,000 ft.) and breezy (Wind: SW 15-25 mph gusts to 40 mph decreasing and shifting W 10-15 mph this afternoon), evening rain and snow showers likely (70%), a (40%) 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. falling to 2,000 ft. late tonight),
• Cloudy with 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.), a good (50%) chance of evening rain and snow showers, a (40%) chance of rain and snow showers late Wednesday night (0.10 in. of rain possible, snow level 1,500 ft. falling to 200 ft. late at night),
• Then mostly cloudy and a bit cooler with a (40%) chance of rain and snow showers Thursday and Thursday night.
• highs 49-45 lows 36-30.
• Cloudy with a (40%) chance of AM rain and snow showers, rain and snow showers likely (70%) and a bit warmer Friday, cloudy with a good (50%) chance of rain and snow showers Friday night,
• Mostly cloudy and a bit warmer with a slight (20%) chance of rain and snow showers Saturday, partly cloudy with a (30%) chance of showers Saturday night,
• Mostly cloudy and a bit cooler with a good (50%) chance of rain and snow Sunday, then mostly cloudy with a (30%) chance of rain and snow showers Sunday night and Monday (a bit warmer).
• highs 46-44warming to 48 Monday lows 33-30 warming to 32 Sunday night. (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 showers and a bit cooler this afternoon (0.75 in. of rain possible), a good (50%) chance of coastal showers with a slight (20%) chance of thunderstorms (small hail possible) tonight while inland evening showers and a slight (20%) chance of thunderstorms (small hail possible) and a good (50%) chance of inland showers 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 AM coastal showers and coastal showers likely (70%) and a bit cooler in the afternoon while a (30%) chance of AM inland rain and snow showers with rain and snow showers likely (70%) Wednesday afternoon (0.25 in. of rain possible, snow level 1,500 ft.), cloudy with evening coastal showers while evening inland rain and snow showers,  rain and snow showers likely (70%) late at night (0.25 in. of rain 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 cooler Thursday (snow level 100 ft. rising to 1,500 ft. in the afternoon), a (30%) chance of evening showers, then a slight (20%) chance of rain and snow showers late Thursday night.
• highs 49-46 lows 39-36.
• Cloudy with a good (50%) chance of AM rain and snow showers, rain and snow showers likely (70%)  Friday afternoon, evening showers likely (70%), a (40%) chance of showers Friday night,
• Mostly cloudy and a bit warmer with a slight (20%) chance of rain and snow showers Saturday , partly cloudy with a  slight (20%) chance of showers Saturday night,
• Mostly cloudy and a bit cooler with a good (50%) chance of rain and snow Sunday, a (40%) chance of showers at night,
• Then mostly cloudy with a (40%) chance of rain and snow showers Monday.
• highs 47-50 cooling back to 47 Monday lows near 38. (seasonal averages high 53 low 40)

 

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Forecast for the Cascades in Lane County:

• Mostly cloudy with rain and snow and a bit cooler this afternoon (5-7 in. of snow possible), evening snow showers, a good (50%) chance of snow showers and colder late tonight (0.10 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 (1-3 in. of snow possible), snow showers likely (70%) at night,
• Mostly cloudy and a bit cooler with a (40%) chance of snow showers Thursday, a (40%) chance of snow showers Thursday night.
• snow level 3,500 ft. today, at the surface tonight through Wednesday night, 3,000 ft. Thursday, then at the surface Thursday night.
• highs 33-27 lows 21-14.
• Cloudy and a bit warmer with a good (50%) chance of snow showers Friday and at night,
• Mostly cloudy and a bit warmer with a (40%) chance of snow showers Saturday, partly cloudy with a slight (20%) chance of snow showers Saturday night,
• Cloudy with a (40%) chance of snow showers Sunday, then mostly cloudy with a good (50%) rain and snow showers Sunday night and Monday.
• snow level at the surface Friday through Sunday, 2,500 Sunday night, then snow level at the surface Monday.
• highs 28-32 lows near 15.

 

 

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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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