Here is my weekly weather quiz question for the last time. What is “An Arroyo?” Here is the correct answer. An Arroyo is in hydrologic terms, a water-carved channel or gully in arid country, usually rather small with steep banks, dry most of the time, due to infrequent rainfall and the shallowness of the cut which does not penetrate below the level of permanent ground water. I’ll have a new weekly weather quiz question for you starting Monday. 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 through the Pacific Northwest but will fall apart today as it moves in. 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 10 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 7 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:

• Cloudy with a (40%) chance of afternoon showers (under 0.10 in. of rain possible), just mostly cloudy tonight,
• Partly cloudy and a bit cooler with a slight (20%) chance of showers Sunday afternoon, then partly cloudy and colder with patchy frost late Sunday night and Monday AM, mostly sunny and a bit warmer in the afternoon, partly cloudy in the evening, then mostly cloudy Monday night.
• highs 56-59 lows 39-32 warming to 35 Monday night.
• Mostly cloudy and a bit warmer Tuesday and Tuesday night,
• A mix of clouds and sun Wednesday, cloudy with a (40%) chance of rain Wednesday night,
• Mostly cloudy with a good (50%) chance of showers and a bit cooler Thursday and at night,
• Then mostly cloudy with showers likely (70%) Friday.
• highs 65-69 cooling to 59 Thursday and Friday lows 43-48 cooling to 45 Thursday night. (seasonal averages high 59 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:

• Cloudy with a slight (20%) chance of showers and a bit warmer this afternoon (under 0.10 in. of rain possible), mostly cloudy with a slight (20%) chance of evening showers, partly cloudy with a slight (20%) chance of showers late tonight,
• Mostly cloudy Sunday AM, partly cloudy and a bit cooler in the afternoon, mostly cloudy in the evening, mostly clear late Sunday night,
• Sunny in the AM, partly cloudy and a bit warmer Monday afternoon, then mostly cloudy Monday night.
• highs 60-56 warming back to 60 Monday lows 42-36 warming to 39 Monday night.
• 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 showers and cooler Thursday, a (40%) chance of rain at night,
• Then mostly cloudy and a bit cooler with rain likely (70%) Friday.
• highs 64-68 cooling to 58 Friday lows 44-46. (seasonal averages high 60 low 40)

 

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

• Cloudy with a slight (20%) chance of  showers this afternoon (under 0.10 in. of rain possible), mostly cloudy with a slight (20%) chance of inland evening showers, just partly cloudy late tonight,
• 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 AM, partly cloudy in the afternoon, mostly cloudy at night.
• highs 54-56 lows 43-40 warming back to 43 Monday night.
• Cloudy and a bit warmer Tuesday , mostly cloudy with a slight (20%) chance of showers Tuesday night,
• Mostly cloudy 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 46-48 cooling back to 46 Thursday night. (seasonal averages high 54 low 42)

 

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Forecast for the Cascades in Lane County:

• cloudy with a good (50%) chance of showers this afternoon (under 0.10 in. of rain possible), mostly cloudy with a slight (20%) chance of showers tonight,
• A mix of clouds and sun and a bit cooler with a slight (20%) chance of snow showers Sunday, partly cloudy Sunday night,
• Mostly sunny Monday night, then partly cloudy at night.
• snow level above 8,000 ft. today, 7,500 ft. falling to 6,000 ft. tonight, free air freezing level 5,000 ft. falling to the surface Sunday night, at the surface rising t0 6,000 ft. Monday, then 6,500 ft. Monday night.
• highs 45-48 lows 32-18 warming to 28 Monday night.
• Mostly cloudy Tuesday and at night,
• A mix of clouds and sun and a bit warmer Wednesday, becoming cloudy with a (40%) chance of rain Wednesday night,
• Mostly cloudy and a bit cooler with showers likely (70%) Thursday, a good (50%) chance of showers at night,
• Then rain and snow showers likely (70%) Friday.
• free air freezing level 6,500 ft. rising to 7,500 ft. Tuesday, 8,000 ft. Tuesday night, 9,000 ft. Wednesday, snow level above 7,500 ft. Wednesday night, 7,000 ft. Thursday, 6500 ft. Thursday night, then 6,000 ft. Friday.
• highs 50-54 cooling to 43 Friday lows 33-36 cooling back to 33 Thursday night.

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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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