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 6 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 5 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 WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 4 PM THIS AFTERNOON FOR THE COAST RANGE OF NORTHWEST OREGON
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 PM TONIGHT FOR THE CENTRAL COAST RANGE OF WESTERN OREGON.
• CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, AND JACKSON COUNTY.
• A FREEZE WARNING IS IN EFFECT UNTIL 8 AM TODAY FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
• A FROST ADVISORY IS IN EFFECT FROM 10 PM TONIGHT UNTIL 8 AM SATURDAY FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 AM SATURDAY FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, AND JACKSON COUNTY.
• A WINTER STORM WARNING IS IN EFFECT UNTIL 10 AM SATURDAY FOR THE CURRY COUNTY COAST  CENTRAL DOUGLAS COUNTY, 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:

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

 

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Forecast for Roseburg:

• Mostly cloudy with rain and snow showers likely (70%) this afternoon (under 0.10 in. of rain possible, 1 in. of snow possible lower elevations and 1-2 in. of snow possible above 1,500 ft., afternoon snow level 600 ft.), evening rain and snow showers likely (70%), a good (50%) chance of rain and snow showers late tonight (0.10 in. of rain possible, snow level 1,500 ft. falling to 600 ft. late at night),
• Mostly cloudy with a slight (20%) chance of AM snow showers, just partly cloudy and a bit warmer Saturday afternoon and evening, partly cloudy in the evening, mostly cloudy with a slight (20%) chance of rain late at night,
• Mostly cloudy with AM rain and snow likely (70%), rain and snow showers and a bit cooler Sunday afternoon (snow level 900 ft.), cloudy with evening rain and snow showers, then a good (50%) chance of rain and snow showers late Sunday night.
• highs 45-50 cooling to 43 Sunday lows 32-34.
• 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:

• Cloudy with coastal showers and a bit cooler this afternoon while inland rain and snow showers and a bit cooler this afternoon (0.25 in. of rain possible, snow level 600 ft. rising to 1,500 ft. this afternoon), coastal showers and a slight (20%) chance of thunderstorms this evening while inland evening rain and snow showers and a good (50%) chance of inland rain and snow showers late tonight (0.25 in. of rain possible, 1-2 in. of snow possible, snow level 1,500 ft. falling to 1,000 ft.),
• Mostly cloudy with a slight (20%) chance of AM coastal showers and partly cloudy Saturday afternoon while mostly cloudy in the AM with a slight (20%) chance of inland AM rain and snow showers, mostly clear in the evening at the shore and mostly cloudy with a slight (20%) chance of rain late at night while mostly cloudy with slight (20%) chance of inland rain late Saturday night,
• Cloudy with AM coastal rain likely (70%) rain and snow Sunday with showers and a slight (20%) chance of thunderstorms while AM inland rain and snow likely (70%) and inland rain and snow showers in the afternoon, mostly cloudy with evening rain and snow showers, then a good (50%) of rain and snow showers late at night.
• highs 45-50 cooling back to 45 Saturday lows near 38.
• Mostly cloudy and a bit warmer with showers likely (70%) Monday, a (40%) 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:

• Cloudy and a bit cooler with a good (50%) chance of snow showers this afternoon, a good (50%) chance of evening snow showers, cold with a slight (20%) chance of snow showers late tonight
• A mix of clouds and sun and a bit warmer Saturday with a slight (20%) chance of afternoon snow showers, partly cloudy in the evening, mostly cloudy with a slight (20%) chance of snow showers late Saturday night,
• Mostly cloudy and a bit cooler with snow showers Sunday and at night.
• snow level at the surface tonight through Friday night, 2,500 ft. Saturday, free air freezing level 3,500 ft. Saturday evening, then snow level at the surface Sunday and Sunday night.
• highs 28-32 cooling back to 28 Sunday lows 17-22.
• 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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