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 that will give us the chance for some Winter precipitation. The graphic for days 1-3 shows a low moving southward along the Pacific Coast. The graphic for days 3-7 shows frontal movement 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 5 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 10 in the good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 3 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 COQUILLE RIVER AT COQUILLE.
• A WINTER WEATHER ADVISORY IS IN EFFECT FROM 3 AM UNTIL NOON FRIDAY FOR THE NORTH OREGON COAST.
• A WINTER WEATHER ADVISORY IS IN EFFECT FROM 1 PM FRIDAY UNTIL 10 AM SATURDAY FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, AND JACKSON COUNTY.
• A FREEZE WARNING IS IN EFFECT FROM MIDNIGHT TONIGHT UNTIL 8 AM FRIDAY FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
• A WINTER STORM WARNING IS IN EFFECT FROM 1 PM FRIDAY UNTIL 10 AM SATURDAY FOR THE CURRY COUNTY COAST, EASTERN CURRY COUNTY, AND JOSEPHINE 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:

• Partly cloudy with a good (50%) chance of evening rain or snow showers, a slight (20%) chance of  rain and snow showers tonight (under 0.10 in. of rain possible,), patchy fog late tonight,
• Cloudy with a (40%) chance of AM rain and snow showers, rain and snow showers likely (70%) and a bit cooler Friday afternoon (0.25 in. of rain possible, 1 in. of snow possible), mostly cloudy with evening rain and snow showers likely (70%), a (40%) chance of rain and snow showers late at night (0.10 in. of rain possible, little or no snow accumulation possible, snow level 1,000 ft.),
• Patchy AM fog, a mix of clouds and sun and a bit warmer Saturday afternoon, partly cloudy in the evening, becoming mostly cloudy with a (40%) chance of rain and snow showers late at night (under 0.10 in. of rain possible, snow level 1,000 ft. late at night),
• Mostly cloudy with AM rain and snow showers, showers and a bit cooler Sunday afternoon (snow level 1,500 ft.), then rain and snow showers likely (70%) Sunday night (snow level 1,500 ft.).
• lows 30-34 highs 43-47 cooling back to 43 Sunday.
• Mostly cloudy with a good (50%) chance of showers and a bit warmer Monday, a (40%) chance of showers and a bit warmer at night and Tuesday, a slight (20%) chance of showers Tuesday night,
• A mix of clouds and sun and a bit warmer with a slight (20%) chance of showers Wednesday, partly cloudy Wednesday night,
• Then a mix of clouds and sun with a slight (20%) chance of rain Thursday.
• highs 45-50 lows near 35. (seasonal averages high 53 low 35)

 

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Forecast for Roseburg:

• Mostly cloudy with a (30%) chance of evening rain and snow showers (under 0.10 in. of rain possible, snow level 2,000 ft.), just partly cloudy with patchy fog late tonight,
• Cloudy with patchy AM fog, mostly cloudy with a (30%) chance of rain and snow showers Friday afternoon (under 0.10 in. of rain possible, afternoon snow level 500 ft. rising to 1,000 ft.), evening rain and snow showers likely (70%), a good (50%) chance of rain and snow showers late Friday night (0.10 in. of rain possible, snow level 1,500 ft. falling to 400 ft. late at night),
• Mostly cloudy with a slight (20%) chance of AM rain and snow showers (AM snow level 100 ft.), partly cloudy and a bit warmer Saturday afternoon and evening , partly cloudy in the evening, mostly cloudy with a slight (20%) chance of rain and snow late at night,
• Mostly cloudy with rain and snow and a bit cooler Sunday and in the evening, rain and snow showers likely (70%) late Sunday night.
• lows 29-34 highs 45-50.
• Mostly cloudy with a (40%) chance of rain and snow showers Monday, a slight (20%) chance of rain and snow showers late at night,
• Mostly cloudy and a bit warmer Tuesday and at night,
• Partly cloudy and a bit warmer Wednesday and Wednesday night,
• Then mostly cloudy Thursday.
• highs 47-52 lows 35-28. (seasonal averages high 55 low 38)

 

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

• Partly cloudy with a slight (20%) chance of coastal showers tonight while a slight (20%) chance of evening inland snow showers (evening snow level 2,000 ft.), patchy fog late tonight,
• Cloudy with patchy AM fog and a (40%) chance of coastal showers with coastal showers likely (70%) and a bit cooler in the afternoon while a good (50%) chance of inland rain and snow showers and a bit cooler Friday (0.25 in. of rain possible, snow level 700 ft. rising to 1,500 ft. in the afternoon), coastal showers while inland rain and snow showers Friday night (0.25 in. of rain possible, 1 in. of snow possible, snow level 1,500 ft.),
• Mostly cloudy early then partly cloudy with a slight (20%) chance of coastal showers Saturday while mostly cloudy in the AM with a slight (20%) chance of inland rain and snow showers and partly cloudy and a bit warmer inland Saturday afternoon (AM snow level 300 ft.), partly cloudy in the evening, mostly cloudy with slight (20%) chance of rain late Saturday night,
• Cloudy with rain and snow Sunday and in the evening, then showers likely (70%) late at night.
• lows 35-40 highs 45-50 cooling back to 45 Saturday.
• Mostly cloudy and a bit warmer with a (30%) chance of showers Monday, a slight (20%) chance of showers Monday night,
• Just mostly cloudy and a bit warmer Tuesday and Tuesday night,
• Partly cloudy and a bit cooler Wednesday and at night,
• Then mostly cloudy and a bit warmer Thursday.
• highs 49-54 cooling to 52 Thursday lows 40-38. (seasonal averages high 53 low 41)

 

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Forecast for the Cascades in Lane County:

• Mostly cloudy with a good (50%) chance of evening snow showers, cold with a slight (20%) chance of snow showers late tonight,
• Cloudy with a slight (20%) chance of AM snow showers, a bit cooler with a good (50%) chance of snow showers Friday afternoon, evening snow showers likely (70%), cold with a (40%) chance of snow showers late Friday night,
• A mix of clouds and sun and a bit warmer Saturday with a slight (20%) chance of snow showers, partly cloudy with a slight (20%) chance of evening snow showers, mostly cloudy with a (30%) chance of snow showers late Saturday night,
• Mostly cloudy and a bit cooler with snow showers Sunday, then snow showers likely (70%) at night.
• snow level at the surface tonight through Friday night, 2,500 ft. Saturday and in the evening, then at the surface late Saturday night through Sunday night.
• lows 10-22 highs 28-32 cooling back to 28 Sunday.
• Mostly cloudy and a bit cooler with snow showers likely (70%) Monday, a good (50%) chance of snow showers  at night,
• A (40%) chance of showers Tuesday and a bit warmer, a slight (20%) chance of snow showers Tuesday night,
• Partly cloudy with a slight (20%) chance of snow showers  and a bit warmer Wednesday, just partly cloudy at night,
• Then a mix of clouds and sun and a bit warmer with a slight (20%) chance of rain and snow Thursday.
• snow level at the surface Monday through Tuesday, 2,500 ft. Tuesday night and Wednesday, free air freezing level 4,500 ft. Wednesday night, then snow level 4,500 ft. Thursday.
• highs 27-38  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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