Here is my weekly weather quiz question. What is “An Arroyo?” 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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Another Upper Level Low Pressure Trough (Shaded “U” shape with blue arrows) is moving away as an Upper Level High Pressure Ridge (“Shaded “Arch” shape with blue arrows on previous graphic) takes over tonight and into the weekend. The graphic for days 1-3 shows the next front that is headed for the Pacific Northwest but will fall apart Saturday as it moves through. The graphic for days 3-7 shows the next complex frontal systems that will be moving into Oregon through next Friday. 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 18 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 8 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 BEACH HAZARDS STATEMENT IS IN EFFECT FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST INCLUDING ALL OF THE BEACHES ALONG THE CURRY, COOS, AND DOUGLAS COUNTY COASTS FROM SATURDAY AFTERNOON THROUGH SUNDAY MORNING . THE SNEAKER WAVES THREAT WILL INCREASE SATURDAY AFTERNOON AND EVENING AND CONTINUE INTO EARLY SUNDAY MORNING AS A LONG PERIOD WEST SWELL IMPACTS THE COAST.
• A FLOOD WARNING IS IN EFFECT FOR THE COLUMBIA RIVER AT VANCOUVER AFFECTING MULTNOMAH 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 this evening, mostly cloudy late tonight,
• Cloudy with a (40%) chance of rain Saturday AM, just a slight (20%) chance of afternoon showers (under 0.10 in. of rain possible), mostly cloudy in the evening, partly cloudy late Saturday night,
• Partly cloudy and a bit cooler with a slight (20%) chance of showers Sunday afternoon, then partly cloudy Sunday night through Monday night (a bit warmer Monday).
• lows 43-34 warming to 36 Monday night highs 58-56 warming back to 58 Monday.
• A mix of clouds and sun and a bit warmer Tuesday, mostly cloudy and a bit warmer Tuesday night and Wednesday, mostly cloudy with a (40%) chance of rain Wednesday night,
• Mostly cloudy with rain likely (70%) and a bit cooler Thursday, s good (50%) chance of showers at night,
• Then mostly cloudy with rain likely (70%) Friday.
• highs 62-67 cooling to 59 Thursday and Friday lows 42-46. (seasonal averages high 58 low 38)

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Eugene-Springfield Pollen Count:

Grass………. Low (0)

Trees………. Very High (1111)

Last Counted: 3/29/17

Data Courtesy of Oregon Allergy Associates.

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Forecast for Roseburg:

• Clear this evening, increasing clouds to mostly cloudy late tonight,
• Cloudy with a slight (20%) chance of AM rain, a slight (20%) chance of showers and a bit warmer Saturday afternoon (under 0.10 in. of rain possible), mostly cloudy with a slight (20%) chance of showers at night,
• Partly cloudy and a bit cooler Sunday, mostly cloudy in the evening, partly cloudy late Sunday night,
• Partly cloudy in the AM, sunny and a bit warmer Monday afternoon, then partly cloudy Monday night.
• lows 43-36 warming to 39 Monday night highs 60-58 warming back to 60 Monday.
• Mostly cloudy and a bit warmer Tuesday through Wednesday, mostly cloudy with a (30%) chance of rain Wednesday night,
• Mostly cloudy with a good (50%) chance of rain and cooler Thursday, a (40%) chance of rain at night,
• The mostly cloudy and a bit cooler with rain likely (70%) Friday.
• highs 64-68 cooling to 58 Friday lows near 46. (seasonal averages high 59 low 40)

 

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

• Clear this evening, increasing clouds to mostly cloudy late tonight,
• Cloudy with a slight (20%) chance of  AM rain, a slight (20%) chance of showers Saturday afternoon (under 0.10 in. of rain possible), mostly cloudy with a slight (20%) chance of inland evening showers, just partly cloudy Saturday night,
• Sunny Sunday AM, partly cloudy and a bit cooler in the afternoon, mostly cloudy in the evening, mostly clear late Sunday night,
• Mostly sunny Monday, then partly cloudy at night.
• lows 46-40 warming to 43 highs near 55.
• Mostly cloudy and a bit warmer Tuesday through Wednesday, a (40%) chance of rain Wednesday night,
• Mostly cloudy and a bit cooler with a good (50%) chance of showers Thursday, a good (50%) chance of rain at night,
• Then mostly cloudy with rain likely (70%) and a bit cooler Friday.
• highs 59-62 cooling to 56 Friday lows 49-47. (seasonal averages high 54 low 42)

 

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Forecast for the Cascades in Lane County:

• Partly cloudy tonight,
• Mostly cloudy with a good (50%) chance of AM rain, a bit warmer with a good (50%) chance of showers Saturday afternoon (under 0.10 in. of rain possible), a slight (20%) chance of evening showers, partly cloudy with a slight (20%) chance of showers late Saturday night,
• A mix of clouds and sun and a bit cooler with a slight (20%) chance of rain and snow showers Sunday, mostly cloudy in the evening, then partly cloudy late Sunday night through Monday night.
• free air freezing level 9,000 ft. falling to 8,000 ft. late tonight, snow level 8,000 ft. Saturday, 7,500 ft. falling to 6,000 ft. Saturday night, 4,500 ft. Sunday and Sunday night, free air freezing level 5,000 ft. rising t0 5,500 ft. Monday, then 7,000 ft. falling to 6,000 ft. Monday night.
• lows 30-18 warming back to 30 Monday night highs 45-47
• A mix of clouds and sun Tuesday, mostly cloudy at night,
• Mostly cloudy and a bit warmer with a slight (20%) chance of showers Wednesday, cloudy with a (40%) chance of rain Wednesday night,
• Mostly cloudy and a bit cooler with rain likely (70%) Thursday, a good (50%) chance of showers at night,
• Then rain and snow likely (70%) Friday.
• free air freezing level 6,000 ft. rising to 7,000 ft. Tuesday, 9,000 ft. Tuesday night, snow level above 8,000 ft. Wednesday and Wednesday night, 7,500 ft. Thursday, 6500 ft. Thursday night, then 5,500 ft. Friday.
• highs 47-53 cooling to 43 Friday lows 32-34.

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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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