Here is my weekly weather quiz question for the last time. What is the “Aleutian Low?” Here is the correct answer. The Aleutian Low is a semi-permanent, subpolar area of low pressure located in the Gulf of Alaska near the Aleutian Islands. It is a generating area for storms and migratory lows often reach maximum instensity in this area. It is most active during the late fall to late spring. During the summer, it is weaker, retreating towards the North Pole and becoming almost nonexistent. During this time, the North Pacific High pressure system dominates. I’ll have a new weekly weather quiz question for you starting Monday. Please remember to post your answer at the bottom of this page. 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 losing control over our weather and High Pressure (Shaded “Arch” shape with blue arrows) starts to take over to dry us out and return the sunshine. The graphic for days 1-3 shows no surface frontal system moving into the Pacific Northwest. The graphic for days 3-7 shows the next fronts to approach us on Wednesday and again 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 54 in the Moderate category measuring Particulate Matter.

Oakridge: The Air Quality Index is 17 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 9 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: YELLOW – Caution is Advised.

*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:

• AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL NOON MONDAY FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, JACKSON COUNTY, THE SOUTHERN OREGON CASCADES, THE SISKIYOU MOUNTAINS, THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND CENTRAL, EASTERN, AND WESTERN LAKE COUNTY.
• FLOOD WARNINGS ARE IN EFFECT FOR THE COWLITZ RIVER AT KELSO, THE GRAYS RIVER NEAR ROSBURG, THE WILSON RIVER NEAR TILLAMOOK, THE LOWER NEHALEN RIVER NEAR FOSS, THE SOUTH YAMHILL RIVER AT MCMINNVILLE, THE MARYS RIVER NEAR PHILOMATH, THE PUDDING RIVER NEAR AURORA, THE COQUILLE RIVER AT COQUILLE, AND THE SPRAGUE RIVER NEAR BEATTY.
• 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:

• Areas of AM fog, a mix of clouds and sun and a bit cooler this afternoon, partly cloudy in the evening, mostly cloudy with patchy fog late tonight,
• Mostly cloudy with patchy AM fog, partly cloudy and a bit warmer Sunday afternoon and  evening, mostly cloudy with patchy fog late Sunday night and Monday AM, a mix of clouds and sun and a bit warmer in the afternoon, partly cloudy in the evening, then mostly cloudy with a patchy fog late Monday night.
• highs 49-52 lows 30-36.
• Partly cloudy with patchy AM fog, a mix of clouds and sun and a bit warmer Tuesday, becoming mostly cloudy with a slight (20%) chance of rain Tuesday night,
• Mostly cloudy and a bit cooler with rain likely (70%) Wednesday, rain at night,
• Rain likely (70%) and a bit cooler Thursday, cloudy with a good (50%) chance of rain Thursday night,
• Then cloudy and a bit cooler with a good (50%) chance of showers Friday.
• highs 57-50 lows 40-46 cooling back to 40 Thursday night. (seasonal averages high 51 low 35)

 

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Forecast for Roseburg:

• Mostly cloudy with a slight (20%) chance of AM rain and snow showers, just mostly cloudy and a bit cooler this afternoon and evening, patchy fog and freezing fog late tonight and Sunday AM, just partly cloudy and a bit warmer in the afternoon, partly cloudy with patchy fog late Sunday night,
• Patchy AM fog, partly cloudy and a bit warmer Monday afternoon, mostly cloudy with a slight (20%) chance of rain at night.
• highs 52-54 lows 34-39.
• Mostly cloudy and a bit warmer Tuesday, mostly cloudy with a (40%) chance of rain Tuesday night,
• Rain likely (70%) Wednesday, rain Wednesday night and Thursday, rain likely (70%) and colder Thursday night,
• Mostly cloudy with a (40%) chance of AM rain and snow showers, then a (40%) chance of showers Friday afternoon.
• highs 59-62 cooling to 54 Friday lows 48-40. (seasonal averages high 53 low 37)

 

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

• Mostly cloudy with a slight (20%) chance of inland showers this AM, just partly cloudy and a bit warmer this afternoon, partly cloudy with patchy fog late tonight,
• Mostly cloudy with patchy AM fog, mostly sunny and a bit warmer Sunday afternoon, partly cloudy in the evening, mostly cloudy with patchy fog late Sunday night,
• Patchy AM fog, partly cloudy and a bit warmer Monday afternoon, then mostly cloudy with a slight (20%) chance of rain Monday night.
• highs 50-55 lows 37-44.
• Mostly cloudy Tuesday, a good (50%) chance of rain Tuesday night,
• Mostly cloudy with rain likely (70%) and a bit cooler Wednesday, rain and breezy at night,
• Rain Thursday, a good (50%) chance of rain Thursday night,
• Then mostly cloudy with a (40%) chance of showers Friday.
• highs 62-54 lows 54-43. (seasonal averages high 53 low 40)

 

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Forecast for the Cascades in Lane County:

• A mix of clouds and sun and a bit cooler this afternoon, partly cloudy tonight,
• Mostly sunny and a bit warmer Sunday, partly cloudy Sunday night,
• AM sun, then partly cloudy and a bit warmer Monday and at night.
• free air freezing level at the surface rising to 3,500 ft. this afternoon, 5,500 ft. rising to 6,000 ft. late tonight, 7,000 ft. rising to 9,000 ft. Sunday, 9,000 ft. Sunday night and Monday, then 11,00o ft. Monday night.
• highs 34-43 lows 20-30.
• A mix of clouds and sun Tuesday, partly cloudy with a slight (20%) chance of rain Tuesday night,
• Mostly cloudy and a bit warmer with a good (50%) chance of rain Wednesday, rain at night and Thursday (a bit cooler), rain and snow likely (70%) Thursday night,
• Then cloudy with a good (50%) chance of rain and snow showers and a bit cooler Friday.
• free air freezing level 8,000 ft. Tuesday, snow level 8,000 ft. Tuesday night, above 8,000 ft. Wednesday and Wednesday night, 7,000 ft. Thursday, 5,000 ft. Thursday night, then 4,500 ft. Friday.
• highs 43-36 lows 33-27.

 

 

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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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