Here is my new weekly weather quiz question. What is “Agglomerate?” 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 Air Low Pressure Trough (Shaded “U” shape with blue arrows) is pushing a frontal system shown on the days 1-3 graphic into the Pacific Northwest. The graphic for days 3-7 shows more frontal systems heading our way Saturday, Monday into Tuesday, and yet another approaching from the northwest Wednesday of next week. 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 8 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 13 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 8 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:

• AN ICE STORM WARNING IS IN EFFECT UNTIL 4 AM THURSDAY BELOW 2,500 FT. FOR THE WESTERN COLUMBIA RIVER GORGE, THE CENTRAL COLUMBIA RIVER GORGE, AND THE UPPER HOOD RIVER VALLEY.
• A FLOOD WARNING IS IN EFFECT FROM THIS EVENING THROUGH THURSDAY EVENING FOR THE LUCKIAMUTE RIVER NEAR SUVER.
• AN URBAN AND SMALL STREAM ADVISORY FOR POOR DRAINAGE AREAS IS IN EFFECT UNTIL 9:30 PM THIS EVENING FOR NORTHWESTERN MULTNOMAH COUNTY, CENTRAL YAMHIL COUNTY, WASHINGTON COUNTY, AND SOUTHERN COLUMBIA COUNTY.
• A FLOOD WATCH IS IN EFFECT UNTIL FRIDAY AFTERNOON FOR THE ROGUE RIVER NEAR AGNESS AND THE COQUILLE RIVER AT COQUILLE.
• A FLOOD WATCH IS IN EFFECT THROUGH MIDNIGHT TONIGHT FOR THE CENTRAL COLUMBIA RIVER GORGE, THE COAST RANGE OF NORTHWEST OREGON, THE GREATER PORTLAND METRO AREA, THE LOWER COLUMBIA, THE NORTH OREGON COAST, THE UPPER HOOD RIVER VALLEY, AND THE WESTERN COLUMBIA RIVER GORGE.
• A FLOOD WATCH IS IN EFFECT THROUGH LATE TONIGHT FOR THE CENTRAL OREGON COAST, THE CENTRAL COAST RANGE OF WESTERN OREGON, THE CENTRAL WILLAMETTE VALLEY, THE SOUTH WILLAMETTE VALLEY, THE NORTHERN OREGON CASCADE FOOTHILLS, AND THE CASCADE FOOTHILLS IN LANE COUNTY.
• A HIGH WIND WARNING IS IN EFFECT UNTIL 4 PM TODAY FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
• A HIGH SURF ADVISORY IS IN EFFECT UNTIIL 7 PM THIS EVENING FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
• A FLOOD WATCH IS IN EFFECT THROUGH LATE TONIGHT FOR THE CURRY COUNTY COAST, EASTERN CURRY COUNTY, AND JOSEPHINE COUNTY.
• A WIND ADVISORY IS IN EFFECT  FROM 10 PM THIS EVENING UNTIL 10 PM WEDNESDAY FOR JACKSON COUNTY.
• A WINTER STORM WARNING IS IN EFFECT UNTIL 4 AM THURSDAY FOR THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES, AND THE SISKIYOU MOUNTAINS.
• A WINTER WEATHER ADVISORY IS IN EFFECT FROM 10 AM TODAY UNTIL 4 AM THURSDAY FOR THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES, AND THE SISKIYOU MOUNTAINS.
• A WIND ADVISORY IS IN EFFECT UNTIL 4 AM THURSDAY FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL, AND EASTERN 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 showers tonight (0.25 in. of rain possible),
• Mostly cloudy with a good (50%) chance of showers and a bit cooler Thursday ( 0.10 in. of rain possible), cloudy with a good (50%) chance of evening showers, rain likely (70%) late at night (0.25 in. of rain possible),
• Mostly cloudy with rain and a bit cooler Friday ( 0.10 in. of rain possible), showers likely (70%) and a bit cooler Friday night ( 0.10 in. of rain possible) and Saturday, then showers Saturday night.
• lows 42-35 highs 48-45.
• Rain and a bit cooler Sunday, showers likely (70%) at night and Monday, cloudy with a good (50%) chance of showers Monday night,
• Mostly cloudy with a slight (20%) chance of showers and a bit cooler Tuesday, then just partly cloudy Tuesday night and Wednesday.
• highs 44-40 lows 34-27. (seasonal averages high 48 low 34)

 

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Forecast for Roseburg:

• Mostly cloudy with evening rain, showers late tonight (0.50 in. of rain possible, snow level 3,500 ft. late),
• Cloudy with a (40%) chance of showers and a bit cooler Thursday (0.25 in. of rain possible, snow level 3,500 ft. falling to 3,000 ft. in the afternoon), a good (50%) chance of evening rain, rain and snow likely (70%) late at night (0.10 in. of rain possible, 1 in. of snow possible, snow level 3,000 ft. falling to 2,000 ft. late),
• Cloudy with AM rain and snow, a (40%) chance of rain and snow and a bit cooler Friday afternoon (0.10 in. of rain possible, snow level 2,000 ft. rising to 2,500 ft.), a (40%) chance of evening showers, a good (50%) of rain and snow showers late Friday night (0.10 in. of rain possible, snow level 3,000 ft. falling to 2,500 ft. late at night),
• Then showers likely (70%) Saturday and Saturday night.
• lows 40-38 highs 52-48.
• Cloudy with rain and a bit cooler Sunday, rain and snow showers likely (70%) Sunday night,
• Rain and snow showers and a bit cooler Monday, rain and snow showers likely (70%) at night,
• Cloudy with a (30%) chance of rain and snow showers and a bit warmer Tuesday, mostly cloudy Tuesday night,
• Then partly cloudy and a bit warmer Wednesday.
• highs near 47 lows 35-30. (seasonal averages high 50 low 37)

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

• Mostly cloudy with coastal showers and a slight (20%) chance of thunderstorms tonight while inland evening rain with showers late tonight (0.50 in. of rain possible),
• Mostly cloudy and a bit cooler with AM coastal showers likely (70%) and a slight (20%) chance of thunderstorms with a good (50%) chance of showers Thursday afternoon while a (40%) chance of inland showers and a bit cooler  (0.25 in. of rain possible), a good (50%) of evening rain, rain late Thursday night (0.25 in. of rain possible),
• Mostly cloudy with AM rain, afternoon coastal rain likely (70%) while a good (50%) chance of inland rain and a bit cooler Friday ( 0.25 in. of rain possible), then showers likely (70%) Friday night ( 0.10 in. of rain possible).
• lows 44-42 highs 54-50.
• Mostly cloudy with showers Saturday and at night,
• Mostly cloudy with rain and breezy and a bit cooler Sunday, showers likely (70%) Sunday night,
• Showers and a bit cooler Monday, showers likely (70%) at night,
• Cloudy and a bit warmer with a (40%) chance of showers Tuesday, mostly cloudy Tuesday night,
• Then partly cloudy and a bit warmer Wednesday.
• highs 50-52 lows 42-37. (seasonal averages high 52 low 40)

 

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Forecast for the Cascades in Lane County:

• Mostly cloudy with rain and snow showers and colder late tonight (0.25 in. of rain possible, 2 in. of snow possible),
• Cloudy with AM rain and snow showers, a (40%) chance of rain and snow showers and a bit cooler Thursday (0.10 in. of rain possible, 1 in. of snow possible), a good (50%) chance of evening rain and snow showers, rain and snow late at night (0.10 in. of rain possible, 1 in. of snow possible),
• Mostly cloudy with rain and snow at times and a bit cooler Friday, snow showers likely (70%) Friday night and Saturday, then snow showers Saturday night.
• snow level 4,500 ft. tonight, 3,500 ft. Thursday, 3,000 ft. Thursday night and Friday, 3,500 ft. Friday night, then 3,000 ft. Saturday and Saturday night.
• lows 29-25 highs 33-30.
• Rain and snow and a bit warmer Sunday, snow showers likely (70%) Sunday night through Monday night,
• Mostly cloudy with a slight (20%) chance of snow and a bit warmer Tuesday, partly cloudy at night,
• Then mostly sunny and a bit warmer Wednesday.
• snow level  3,500 ft. Sunday, 2,500 ft. Sunday night, at the surface Monday through Tuesday, free air freezing level at the surface Tuesday night, then 4,500 ft. Wednesday.
• highs 32-29 warming to 35 Wednesday lows 22-15.

 

 

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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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