Here is my weekly weather quiz question. What is “ Astronomical Dawn?”  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 again late tonight returning the chance of showers Saturday. The graphics through Sunday show the next frontal system to bring us more rain chances today. Willamette Pass Ski is officially closed for the season and Hoodoo is open for this weekend 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 15 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 7 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:

• 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 tonight,
• Mostly cloudy with AM rain likely (70%), a mix of clouds and sun and a bit cooler with a good (50%) chance of showers Saturday afternoon (0.10 in. of rain possible), mostly cloudy with a slight (20%) chance of showers at night,
• 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.
• lows 47-45 warming back to 47 Monday night highs 62-55.
• 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 45-43. (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:

• Partly cloudy this evening, mostly clear late tonight,
• Mostly cloudy with a (30%) chance of AM rain, a (40%) chance of showers Saturday afternoon, a slight (20%) chance of showers Saturday night,
• 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.
• lows 49-45 warming to 47 Monday night highs 65-56.
• 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:

• Partly cloudy with a slight (20%) chance of rain late tonight,
• Mostly cloudy with AM coastal rain while AM inland rain likely (70%), a bit cooler with a good (50%) chance of showers Saturday afternoon, a (40%) chance of showers Saturday night,
• 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,
• lows near 48 highs 59-55.
• 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 48-45. (seasonal averages high 56 low 44)

 

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Forecast for the Cascades in Lane County:

• Partly cloudy tonight,
• A mix of clouds with a good (50%) chance of AM rain, a bit cooler with a good (50%) chance of showers Saturday afternoon, mostly cloudy with a slight (20%) chance of evening showers, a slight (20%) chance of rain and snow showers and colder late Saturday night,
• 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.
• free air freezing level 10,000 ft. tonight, snow level 6,500 ft. Saturday, 5,500 ft. Saturday night, 5,000 ft, Sunday, 4,500 ft. Sunday night and Monday, then 5,500 ft. Monday night.
• lows 35-32 highs 47-40.
• Mostly cloudy with rain and snow Tuesday, rain and snow showers likely (70%) Tuesday night through Thursday night,
• Cloudy with rain and snow showers likely (70%) Wednesday through Thursday night,
• Then cloudy with a good (50%) chance of rain and snow showers Friday.
• snow level 5,500 ft. Tuesday and Tuesday night, 4,500 ft. Wednesday and Wednesday night, 4,000 ft. Thursday, 4,500 ft. Thursday night, then 4,000 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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