Here is my weekly weather quiz question. What is  an“ Ashfall Advisory?” 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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An Upper Level High Pressure Ridge (Shaded “Arch” shape with blue arrows) took over briefly, now another Upper Level Low Pressure Trough (Shaded “U” shape with blue arrows) moves in. The graphic for days 1-3 shows the frontal system that moved into the Pacific Northwest from the Southwest. The graphic for days 3-7 shows a break from frontal storms until between Sunday and Monday. 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 8 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 18 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 WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 11 PM TONIGHT ABOVE 5,000 FT. FOR THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES, AND THE SISKIYOU MOUNTAINS.
• 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:

• Mostly cloudy with  rain and a slight (20%) chance of thunderstorms this afternoon and evening (0.25 in. of rain possible, more in storms), showers likely (70%) late tonight (0.25 in. of rain possible),
• Mostly cloudy with showers and a bit cooler Thursday (0.25 in. of rain possible) and at night (0.10 in. of rain possible),
• Mostly cloudy with showers Friday, a (40%) chance of showers Friday night with patchy fog late.
• highs 57-50 lows 42-35.
• Patchy AM fog, a mix of clouds and sun and a bit warmer Saturday, partly cloudy Saturday night,
• A mix of clouds and sun and a bit warmer Sunday (Easter) with a slight (20%) chance of afternoon showers, mostly cloudy with a good (50%) chance of showers Sunday night,
• Mostly cloudy and a bit cooler with a good (50%) chance of showers Monday, then cloudy with a good (50%) chance of showers Monday night and Tuesday.
• highs 59-62 cooling back to 59 Monday lows 40-43. (seasonal averages high 60 low 39)

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Eugene-Springfield Pollen Count:

Grass………. Low (0)

Trees………. Moderate (58)

Last Counted: 4/11/17

Data Courtesy of Oregon Allergy Associates.

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Forecast for Roseburg:

• Cloudy with rain and a bit warmer this afternoon and evening, a good (50%) chance of showers late tonight (0.25 in. of rain possible, snow level 3,500 ft. falling to 3,000 ft.),
• Mostly cloudy with AM rain and snow showers, showers and a bit cooler Thursday afternoon (0.25 in. of rain possible, snow level 3,000 ft.), cloudy evening showers likely (70%), rain and snow showers late Thursday night (under 0.10 in. of rain possible, snow level 3,000 ft. falling to 2,500 ft. at night),
• AM rain and snow showers, rain and showers likely (70%) Friday afternoon (snow level 2,000 ft. rising to 2,500 ft. in the afternoon, mostly cloudy with a slight (20%) chance of evening showers, then just mostly cloudy Friday night.
• highs 57-53 lows 42-34.
• Partly cloudy with patchy AM fog, mostly cloudy and a bit warmer Saturday afternoon and at night,
• Mostly cloudy and a bit warmer with a slight (20%) chance of showers Sunday (Easter), cloudy with a (40%) chance of showers Sunday night,
• Mostly cloudy with showers likely (70%) and a bit cooler Monday, cloudy with a (40%) chance of showers at night,
• Then showers likely (70%) and a bit cooler Tuesday.
• highs 59-62 cooling back to 59 Tuesday lows 40-45. (seasonal averages high 61 low 41)

 

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

• Mostly cloudy and a bit warmer with rain this afternoon (0.25 in. of rain possible), evening coastal showers likely (70%) with a slight (20%) chance of thunderstorms this evening and coastal showers with a slight (20%) chance of thunderstorms late tonight while evening inland showers likely (70%) and a good (50%) chance of inland showers late tonight (0.25 in. of rain possible),
• Mostly cloudy with showers and a bit cooler Thursday (0.25 in. of rain possible), cloudy with evening showers, coastal showers at night while a good (50%) chance of inland showers likely (70%) Thursday night (0.25 in. of rain possible, snow level 2,000 ft. late at night),
• Mostly cloudy with AM coastal showers while a good (50%) chance of inland AM showers, showers likely (70%) and a bit warmer Friday afternoon (AM snow level 2,000 ft.), a slight (20%) chance of evening showers, then mostly cloudy at night.
• highs 54-52 warming back to 54 Friday lows 44-37.
• Patchy AM fog, mostly cloudy and a bit warmer Saturday, partly cloudy at night,
• Mostly cloudy with a slight (20%) chance of showers and a bit warmer Saturday, just mostly cloudy at night,
• Mostly cloudy and a bit warmer with a (30%) chance of showers Sunday (Easter), cloudy with a (40%) chance of showers Sunday night,
• Then mostly cloudy with a good (50%) chance of showers and a bit cooler Monday, cloudy with a good (50%) chance of showers Monday night,
• Then showers likely (70%) Tuesday.
• highs 58-56 lows 42-47. (seasonal averages high 55 low 43)

 

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Forecast for the Cascades in Lane County:

• Mostly cloudy with rain and snow and a bit warmer this afternoon (0.25 in. of rain possible, 2 in. of snow possible), evening rain and snow, rain and snow showers late tonight (0.50 in. of rain possible, 2-5 in. of snow possible),
• Rain and snow showers and a bit cooler Thursday (0.25 in. of rain possible, 1-3 in. of snow possible) and at night,
• Mostly cloudy and a bit cooler with snow showers Friday, then mostly cloudy with a (40%) chance of rain and snow showers at night.
• snow level 5,000 ft. today, 5,000 ft. falling to 3,500 ft. late tonight, 3,500 ft. Thursday, 3,000 ft. Thursday night, 2,500 ft. Friday, then 3,000 ft Friday night.
• highs 45-34 lows 28-20.
• A mix of clouds and sun and a bit warmer Saturday, partly cloudy at night,
• Mostly cloudy and a bit cooler with a slight (20%) chance of AM rain and snow showers Sunday (Easter), cloudy with a good (50%) chance of rain and snow showers Sunday night,
• Mostly cloudy with a good (50%) chance of rain and snow showers Monday (a bit cooler) and Monday night,
• Then mostly cloudy with rain and snow showers likely (70%) and a bit warmer Tuesday.
• free air freezing level 4,000 ft. Saturday, 5,500 ft. Saturday night, snow level 5,500 ft. Sunday and Sunday night, 5,000 ft. Monday, 5,500 ft. Monday night, then 4,500 ft. Tuesday.
• highs 43-45 cooling to 45 Tuesday lows 28-32.

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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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