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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An Upper Level Low Pressure Trough (Shaded “U” shape with blue arrows) is moving away to be followed by an Upper Level High Pressure Ridge (Shaded “Arch” shape with blue arrows). That means dry and warmer weather. The graphic for days 1-3 shows surface High Pressure building over the Pacific Northwest. The graphic for days 3-7 shows the next complex frontal systems that will be moving into Oregon Thursday through next Saturday. 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 11 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 3 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  THROUGH 8 PM TONIGHT. THE SNEAKER WAVES THREAT WILL CONTINUE INTO EARLY THIS EVENING 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 and colder with patchy frost late tonight and Monday AM, mostly sunny and a bit warmer in the afternoon, partly cloudy Monday night,
• Mostly cloudy and a bit warmer with a slight (20%) chance of light rain or sprinkles Tuesday, just mostly cloudy in the evening, partly cloudy at night,
• Mostly cloudy and a bit warmer Wednesday with a slight (20%) chance of afternoon rain, then increasing clouds to cloudy with a good (50%) chance of rain Wednesday night.
• lows 32-45 highs 56-66.
• Mostly cloudy with rain likely (70%) and a bit cooler Thursday through Friday, rain likely (70%) Friday night,
• Mostly cloudy and a bit cooler with showers likely (70%) Saturday, cloudy with a good (50%) chance of showers at night,
• Then mostly cloudy with showers likely (70%) and a bit cooler Sunday.
• highs 59-54 lows 46-42. (seasonal averages high 59 low 39)

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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:

• Mostly clear this evening, partly cloudy with patchy frost late tonight and Monday AM, sunny and a bit warmer Monday afternoon, partly cloudy in the evening, mostly cloudy late Monday night,
• Mostly cloudy and a bit warmer Tuesday and at night,
• Mostly cloudy Wednesday with a (%) chance of afternoon rain, then rain likely (70%) Wednesday night.
• lows 35-47 highs 62-69.
• Mostly cloudy and a bit cooler with rain likely (70%) Thursday and Thursday night,
• Showers and a bit cooler Friday, rain likely (70%) at night,
• Mostly cloudy with showers and a bit cooler Saturday, rain and snow showers likely (70%) Saturday night,
• Then mostly cloudy and a bit warmer with rain and snow likely (70%) Sunday.
• highs 63-52 warming to 57 Sunday lows 47-40. (seasonal averages high 60 low 41)

 

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

• Mostly clear this evening, partly cloudy with patchy inland frost late tonight and Monday AM, sunny and a bit warmer in the afternoon, mostly cloudy Monday night through Tuesday night,
• Mostly cloudy and a bit cooler Wednesday with a (40%) chance of afternoon rain, then cloudy with rain likely (70%) at night.
• lows 38-47 highs 56-65 cooling to 62 Wednesday.
• Mostly cloudy and a bit cooler with rain likely (70%) Thursday and Thursday night,
• Mostly cloudy with showers and breezy Friday, rain and breezy at night,
• Showers and breezy and a bit cooler Saturday, showers likely (70%) Saturday night,
• Then mostly cloudy and a bit warmer with rain likely (70%) Sunday.
• highs 58-52 warming to 55 Sunday lows 49-43. (seasonal averages high 54 low 42)

 

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Forecast for the Cascades in Lane County:

• Partly cloudy and colder tonight,
• Mostly sunny and a bit warmer Monday, partly cloudy at night,
• Mostly cloudy Tuesday and a bit warmer with a slight (20%) chance of light in or sprinkles, a slight (20%) chance of evening rain, just partly cloudy late Tuesday night,
• A mix of clouds and sun and a bit warmer Wednesday with a (30%) chance of afternoon showers, then becoming cloudy with a good (50%) chance of rain Wednesday night.
• free air freezing level 5,000 ft. falling to the surface tonight, 3,500 ft. rising to 5,500 ft. Monday, 6,000 ft. rising to 7,000 ft. late Monday night, snow level 6,000 ft. Tuesday, 7,500 ft. Tuesday night and Wednesday, then 7,000 ft. Wednesday night.
• lows 16-34 highs 45-55.
• Mostly cloudy and a bit cooler with rain likely (70%) Thursday and at night,
• Then mostly cloudy with rain and snow showers likely (70%) and a bit cooler Friday, rain and snow likely (70%) Friday night,
• Rain and snow showers and a bit cooler Saturday, rain and snow showers likely (70%) at night.
• Then mostly cloudy and a bit cooler with snow showers likely (70%) Sunday.
• snow level  6,000 ft. Thursday, 6,500 ft. Thursday night, 5,500 ft. Friday a, 4,500 ft. Friday night, 3,500 ft. Saturday, 3,000 ft. Saturday night, then 2,500 ft. Sunday.
• highs 48-40 lows 34-27.

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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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