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 moved through today then the next one follows 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 46 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 45 in the good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 4 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 WATCH IS IN EFFECT THROUGH TUESDAY MORNING 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 WIND ADVISORY IS IN EFFECT FROM MIDNIGHT TONIGHT UNTIL 10 AM TUESDAY FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, THE EASTERN DOUGLAS COUNTY FOOTHILLS, JACKSON COUNTY
• 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.
• A HIGH WIND WARNING IS IN EFFECT UNTIL 7 PM TUESDAY FOR 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  NORTHERN AND EASTERN KLAMATH COUNTY, AND CENTRAL, EASTERN, AND WESTERN LAKE COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT FROM 10 PM TONIGHT UNTIL 4 PM TUESDAY 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 late tonight (0.25 in. of rain possible),
• Mostly cloudy with rain and a bit cooler Tuesday (0.50 in. of rain possible), 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 (0.25 in. of rain possible, snow level 1,500 ft.), rain and snow showers likely (70%) Wednesday night (0.10 in. of rain possible),
• Mostly cloudy with a (40%) chance of rain and snow showers and a bit cooler Thursday, a (40%) chance of rain and snow showers at night (snow level 1,000 ft.).
• lows 42-30 highs 48-45.
• 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.),
• Partly cloudy and a bit warmer Saturday, just partly cloudy at night,
• A mix of clouds and sun with a (40%) chance of rain and snow Sunday (snow level 1,500 ft.), a (40%) chance of showers Sunday night,
• Then mostly cloudy with a (30%) chance of rain Monday.
• highs 44-48 lows 29-32. (seasonal averages high 52 low 35)

 

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Forecast for Roseburg:

• Cloudy with rain likely (70% this evening, rain tonight (0.50 in. of rain possible),
• Mostly cloudy with AM rain, a bit cooler with rain and snow showers Tuesday afternoon (0.50 in. of rain possible, snow level 3,500 ft. falling to 3,000 ft.), a (40%) chance rain and snow showers Tuesday night (under 0.10 in. of rain possible, snow level 2,000 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, snow level 1,500 ft. rising to 2,000 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 900 ft. late at night),
• Then mostly cloudy and a bit cooler with a (40%) chance of rain and snow showers Thursday and Thursday night.
• lows 43-32 highs 49-43.
• Cloudy with a (40%) chance of rain and snow showers and a bit warmer Friday and 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 46-44 lows 33-30 warming to 32. (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 evening coastal rain likely (70%) and rain late tonight while inland rain tonight (0.75 in. of rain possible),
• Mostly cloudy with AM rain, showers and a bit cooler Tuesday afternoon (0.75 in. of rain possible), a good (50%) chance of coastal showers with a slight (20%) chance of thunderstorms (small hail possible) Tuesday night while a good (50%) chance of inland rain and snow showers at night (under 0.10 in. of rain possible, no snow accumulation expected, snow level 2,000 ft. late at night),
• Cloudy with coastal showers likely (70%) and a bit cooler while inland rain and snow showers likely (70%) Wednesday (0.25 in. of rain possible, snow level 2,000 ft.), cloudy with evening coastal showers likely (70%) and a good (50%) chance of showers at night while evening rain and snow showers likely (70%) and a good (50%) chance of inland rain and snow showers late at night ()0.25 in. of rain possible),
•  Mostly cloudy with a (40%) chance of rain and snow showers and a bit cooler Thursday and Thursday night.
• lows 46-37 highs 49-46.
• Cloudy and a bit warmer with a good (50%) chance of rain and snow showers Friday and Friday night,
• Mostly cloudy and a bit warmer with a slight (20%) chance of rain and snow showers Saturday and ,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 34-38. (seasonal averages high 53 low 40)

 

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Forecast for the Cascades in Lane County:

• Cloudy with rain and snow tonight (0.25 in. of rain possible, 1-2 in. of snow possible),
• Mostly cloudy with rain and snow and a bit cooler Tuesday (0.75 in. of rain possible, 3-7 in. of snow possible) and breezy (Wind: SW 15-25 mph gusts to 45 mph), evening rain and snow, a good (50%) chance of rain and snow showers late Tuesday night (0.25 in. of rain possible, 1-3 in. of snow possible),
• Mostly cloudy with snow showers likely (70%) and a bit cooler Wednesday and at night,
• Mostly cloudy and a bit cooler with a (40%) chance of snow showers Thursday and Thursday night.
• snow level 4,500 ft. tonight, 4,500 ft. falling to 3,500 ft. Tuesday afternoon, 3,000 ft. Tuesday evening, then at the surface Wednesday through Thursday night.
• lows 28-14 highs 35-27.
• 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, a slight (20%) chance of snow showers Saturday night,
• A mix of clouds and sun with a (40%) chance of snow showers Sunday, mostly cloudy with a good (50%) rain and snow showers Sunday night,
• Then mostly cloudy with a (40%) chance of show Monday.
• snow level at the surface Friday through Sunday, 3,000 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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