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 up into the Pacific Northwest. One low moves through today then the next one will follow closely behind it. The graphic for days 3-7 shows no particular surface fronts for the week until next 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 25 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 14 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 2 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 HIGH WIND WARNING IS IN EFFECT UNTIL 2 PM THIS AFTERNOON FOR THE CENTRAL COAST RANGE OF WESTERN OREGON.
• A WIND ADVISORY IS IN EFFECT UNTIL 3 PM THIS AFTERNOON FOR THE CENTRAL WILLAMETTE VALLEY, AND THE SOUTH WILLAMETTE VALLEY.
• A HIGH WIND WARNING IS IN EFFECT UNTIL 3 PM THIS AFTERNOON FOR THE NORTHERN OREGON CASCADE FOOTHILLS AND THE CASCADE FOOTHILLS IN LANE COUNTY,
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 4 PM THIS AFTERNOON FOR THE NORTHERN OREGON CASCADES.
• A FLOOD WATCH IS IN EFFECT THROUGH LATE TONIGHT FOR THE SOUTH CENTRAL OREGON COAST, THE CURRY COUNTY COAST, CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, THE SOUTHERN OREGON CASCADES AND THE SISKIYOU MOUNTAINS.
• A WINTER WEATHER ADVISORY IS IN EFFECT FROM 10 PM TONIGHT UNTIL UNTIL 10 PM TUESDAY ABOVE 4,000 FEET FOR THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES, AND THE SISKIYOU MOUNTAINS.
• A WIND ADVISORY IS IN EFFECT UNTIL 7 PM TUESDAY FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND CENTRAL, EASTERN, AND WESTERN LAKE COUNTY.
• A WINTER STORM WARNING IS IN EFFECT FROM 10 PM TONIGHT UNTIL 10 PM TUESDAY IS IN EFFECT FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND CENTRAL, EASTERN, 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:

• Showers (0.25 in. of rain possible) this afternoon (Presidents’ Day) and breezy (Wind: SW 20-30 mph gusts to 40 mph decreasing to SW 10-15 mph gusts to 30 mph this afternoon), evening showers likely (70%), rain late at night (0.50 in. of rain possible),
• Mostly cloudy with rain and a bit cooler Tuesday (0.50 in. of rain possible), cloudy with a good (50%) chance of showers Tuesday night (under 0.10 in. of rain possible),
• Mostly cloudy with a good (50%) chance of AM showers, showers likely (70%) and a bit cooler Wednesday afternoon, then a good (50%) chance of showers Wednesday night.
• highs 55-46 lows 42-32.
• Mostly cloudy with a (40%) chance of rain and snow showers and a bit cooler Thursday (snow level 1,000 ft.), a (30%) chance of rain and snow showers at night,
• Mostly cloudy and a bit warmer with a good (50%) chance of rain and snow showers Friday (snow level 1,500 ft.), a slight (20%) chance of showers Friday night (snow level 1,000 ft.),
• Partly cloudy and a bit warmer Saturday, partly cloudy with a slight (20%) chance of rain and snow at night (snow level 1,000 ft.),
• Then cloudy with a good (50%) chance of rain and snow Sunday (snow level 1,000 ft.).
• highs 45-48 lows 30-32. (seasonal averages high 52 low 35)

 

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Forecast for Roseburg:

• Cloudy and a bit warmer with a good (50%) chance of rain (0.50 in. of rain possible) this afternoon (Presidents’ Day), rain tonight (0.50 in. of rain possible),
• Mostly cloudy with AM rain, a bit cooler with showers Tuesday afternoon (0.50 in. of rain possible, snow level 3,000 ft.), a good (50%) chance of evening snow showers, evening rain and snow showers likely (70%), a good (50%) chance of rain and snow showers late Tuesday night (under 0.10 in. of rain possible, snow level 2,500 ft. falling to 2,000 ft. late at night),
• Cloudy with rain and snow showers likely (70%) and a bit cooler Wednesday (snow level 1,500 ft.), then mostly cloudy with a (40%) chance of rain and snow showers Wednesday night.
• highs 56-45 lows 43-34.
• Mostly cloudy and a bit cooler with a (30%) chance of rain and snow showers Thursday and Thursday night,
• Cloudy with a (40%) chance of rain and snow showers and a bit warmer Friday, mostly cloudy with a (30%) chance of rain and snow showers at night,
• Mostly cloudy and a bit warmer with a slight (20%) chance of snow showers Saturday, partly cloudy with a slight (20%) chance of showers Saturday night,
• Then mostly cloudy and a bit cooler with a good (50%) chance of rain and snow Sunday.
• highs 44-47 cooling to 43 Sunday lows 34-30. (seasonal averages high 54 low 37)

 

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

• Mostly cloudy and a bit cooler with rain likely (70%) this afternoon (0.25 in. of rain possible) (Presidents’ Day), rain tonight (0.75 in. of rain possible),
• Mostly cloudy with AM rain, showers and a bit cooler Tuesday afternoon (0.50 in. of rain possible), evening coastal showers likely (70%) and a good (50%) chance of coastal showers late Tuesday night while inland showers likely (70%) at night (under 0.10 in. of rain possible, snow level 2,000 ft. late at night),
• Cloudy with AM coastal showers likely (70%) and a bit cooler with a good (50%) chance of coastal showers in the afternoon while inland rain and snow showers likely (70%) Wednesday afternoon (snow level 2,000 ft.), then mostly cloudy with a good (50%) chance of rain and snow showers at night.
• highs 54-47 lows 46-33.
•  Mostly cloudy with a (40%) chance of rain and snow showers and a bit cooler Thursday, a (30%) chance of rain and snow showers Thursday night,
• Cloudy and a bit warmer with a good (50%) chance of rain and snow showers Friday, a (30%) 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 and ,Saturday night,
• Then mostly cloudy and a bit cooler with a good (50%) chance of rain and snow Sunday.
• highs 46-50 cooling back to 46 Sunday lows 36-33 warming to 38 Saturday night. (seasonal averages high 53 low 40)

 

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Forecast for the Cascades in Lane County:

• Cloudy with rain and snow showers (0.25 in. of rain possible, 1-3 in. of snow possible) this afternoon (Presidents’ Day) and windy (Wind: SW 20-30 mph gusts to 45 mph decreasing to SW 10-=15 mph gusts to 30 mph this afternoon), rain and snow tonight (0.50 in. of rain possible, 1-4 in. of snow possible),
• Mostly cloudy with rain and snow and a bit cooler Tuesday (0.50 in. of rain possible, 3-6 in. of snow possible), evening rain and snow showers likely (70%), cloudy with a good (50%) chance of rain and snow showers late Tuesday night,
• Mostly cloudy with snow showers likely (70%) and a bit cooler Wednesday, evening snow showers, then a (40%) chance of snow showers at night.
• snow level 4,500 ft. today, 4,000 ft. tonight, 3,500 ft. Tuesday, 3,000 ft. Tuesday evening, then at the surface Wednesday and Wednesday night.
• highs 38-30 lows 28-18.
• Mostly cloudy and a bit cooler with a (40%) chance of snow showers Thursday, a slight (20%) chance of snow showers Thursday night,
• Mostly cloudy with a (40%) chance of snow showers Friday and at night,
• A mix of clouds and sun and a bit warmer with a slight (20%) chance of snow showers Saturday, just partly cloudy at night,
• Then mostly cloudy with a good (50%) chance of snow Sunday.
• snow level at the surface Thursday through Saturday, free air freezing level at the surface Saturday night, then snow level at the surface Sunday.
• highs 27-33 lows 14-16.

 

 

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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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