Here is my weekly weather quiz question for the last time. What is “ Astronomical Dawn?”Here is the correct answer. Astronomical Dawn is the time at which the sun is 18 degrees below the horizon in the morning. Astronomical dawn is that point in time at which the sun starts lightening the sky. Prior to this time during the morning, the sky is completely dark. I’ll have a new weekly weather quiz question for you Monday.  The first person to post the correct answer as a comment on this page will win a week of free personalized weather forecasts tailored to your needs.  Good luck.

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A short lived Upper Level High Pressure Ridge (Shaded “Arch” shape with blue arrows) dried us out for today, but an Upper Level Low Pressure Trough (Shaded “U” shape with blue arrows) will take over returning the chance of showers today. The graphics for days 1-3 show the frontal system bringing rain chances today and the next front approaching Monday. The graphics for days 3-7 show frontal systems moving into the Pacific Northwest Tuesday night and gain Thursday.

Note: Willamette Pass Ski is officially closed for the season and Hoodoo is open this weekend and then closed for the season. Check out their websites or give them a call.

 

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 43 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 24 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 10 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:

• 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 AM rain likely (70%), a mix of clouds and sun and a bit cooler with a good (50%) chance of showers this afternoon (0.10 in. of rain possible), mostly cloudy with a slight (20%) chance of showers tonight,
• Mostly cloudy with showers likely (70%) Sunday, cloudy with a good (50%) chance of evening rain, rain late Sunday night and Monday, then showers at night.
• highs 62-55 lows 45-47.
• Mostly cloudy with rain Tuesday, showers likely (70%) at night,
• Cloudy with a good (50%) chance of showers Wednesday, mostly cloudy with a good (50%) chance of showers Wednesday night and Thursday, cloudy with a good (50%) chance of showers Thursday night,
• Then cloudy with a (40%) chance of showers Friday.
• highs near 56 lows 46-42. (seasonal averages high 62 low 40)

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Eugene-Springfield Pollen Count:

Grass………. Low (3)

Trees………. Moderate (38)

Last Counted: 4/21/17

Data Courtesy of Oregon Allergy Associates.

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Forecast for Roseburg:

• Mostly cloudy with a (30%) chance of AM rain, a (40%) chance of showers this afternoon, a slight (20%) chance of showers tonight,
• Mostly cloudy with a increasing showers and a bit cooler Sunday, cloudy with a (20%) chance of evening rain, rain late Sunday night (snow level 3,500 ft. late at night),
• Mostly cloudy and a bit cooler with rain Monday and Monday night.
• highs 65-56 lows 45-47.
• Mostly cloudy with rain land a bit warmer Tuesday, showers likely (70%) Tuesday night,
• Cloudy with a good (50%) chance of showers Wednesday, mostly cloudy with a good (50%) chance of showers and a bit cooler Wednesday night and Thursday, then mostly cloudy with a (40%) chance of showers Thursday night and Friday.
• highs near 58 lows 47-44. (seasonal averages high 64 low 43)

 

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

• Mostly cloudy with AM coastal rain while AM inland rain likely (70%), a bit cooler with a good (50%) chance of showers this afternoon, a (40%) chance of showers tonight,
• Mostly cloudy and a bit cooler with showers increasing Sunday, cloudy with a good (50%) chance of evening rain, then rain late Sunday night through Monday night,
• highs 59-55 lows near 49.
• Mostly cloudy with rain Tuesday, showers likely (60%) Tuesday night and Wednesday (a bit cooler), mostly cloudy with a good (50%) chance of showers at night,
• Mostly cloudy and a bit cooler with showers likely (60%) Thursday, then a (40%) chance of showers Thursday night and Friday.
• highs near 56 lows near 48-45. (seasonal averages high 56 low 44)

 

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Forecast for the Cascades in Lane County:

• A mix of clouds with a good (50%) chance of AM rain, a bit cooler with a good (50%) chance of showers this afternoon, mostly cloudy with a slight (20%) chance of evening showers, a slight (20%) chance of rain and snow showers and colder late tonight,
• Mostly cloudy and a bit cooler Sunday with rain and snow showers likely (70%), rain and snow likely (70%) at night,
• Mostly cloudy and a bit cooler with rain and snow Monday, then rain and snow showers Monday night.
• snow level 7,000 ft. falling to 6,000 ft. this afternoon, 5,000 ft. tonight,  4,500 ft. Sunday through Monday, then 5,000 ft. Monday night.
• highs 47-40 lows 32-34.
• Mostly cloudy with rain and snow Tuesday, showers Tuesday night,
• Mostly cloudy with rain and snow showers likely (70%) Thursday and Thursday night,
• Then mostly cloudy with a good (50%) chance of rain and snow showers Friday.
• snow level 5,500 ft. Tuesday and Tuesday night, 4,000 ft. Wednesday, 4,500 ft. Wednesday night, 3,500 ft. Thursday, 4,000 ft. Thursday night, then 3,500 ft. Friday.
• highs near 42 lows 32-29.

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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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