Here is my weekly weather quiz question. What is a “Warm Core Low ?” Please remember to post your answer as a comment by clicking on “no comments /comments” in the upper right hand portion of this page under the caption, then add your comment. The first person to post the correct answer will win a week of free personalized weather forecasts tailored to your needs. The answer has to be a comment to win. An email answer will not count. Good luck.

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An upper level low will slowly migrate eastward through the Pacific Northwest continuing our wet weather. A frontal system approaches the coast over the weekend for more rain and then cooler temperatures.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 10 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 8 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 13 in the Good category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA).

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Advisories:

• A HIGH SURF WARNING IS IN EFFECT THROUGH 2 AM SATURDAY FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
• A COASTAL FLOOD WARNING IS IN EFFECT UNTIL 4 PM FRIDAY FOR THE NORTH OREGON COAST AND THE CENTRAL OREGON COAST.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 PM TONIGHT ABOVE 4,500 FT. FOR THE EASTERN DOUGLAS COUNTY FOOTHILLS, THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES AND THE SISKIYOU MOUNTAINS, THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND CENTRAL, EASTERN AND WESTERN LAKE COUNTY.
• A HEALTH ADVISORY CONTINUES FOR SUNSET BAY STATE PARK BEACH LOCATED IN COOS COUNTY FOR HIGHER-THAN-NORMAL FECAL BACTERIA WHICH CAN RESULT IN DIARRHEA, STOMACH CRAMPS, SKIN RASHES, UPPER RESPIRATORY INFECTIONS AND OTHER ILLNESSES. DIRECT CONTACT WITH THE WATER – ESPECIALLY BY CHILDREN AND THE ELDERLY, WHO MAY BE VULNERABLE TO WATERBORNE BACTERIA – SHOULD BE AVOIDED IN THIS AREA UNTIL THE ADVISORY IS LIFTED. VISITORS SHOULD AVOID WADING IN NEARBY CREEKS, POOLS OF WATER ON THE BEACH, OR IN DISCOLORED WATER AND STAY CLEAR OF WATER RUNOFF FLOWING INTO THE OCEAN.

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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• Mostly cloudy with showers and a slight (20%) chance of thunderstorms this evening, a good (50%) of showers and colder late tonight (0.25 in. of rain possible, more in storms),
• Showers Friday (0.50 in. of rain possible) and breezy (Wind: S 15-25 mph gusts to 45 mph in the afternoon), cloudy with evening showers, a good (50%) chance of showers late Friday night (0.10 in. of rain possible),
• Mostly cloudy with rain Saturday (0.70 in. of rain possible) and Saturday night, heavy at times in the evening (1.25 in. of rain possible),
• Mostly cloudy with showers and a bit cooler Sunday, then a good (50%) chance of showers Sunday night.
• lows 43-46 highs 48-45.
• Mostly cloudy with a good (50%) chance of showers Monday, a (40%) chance of showers at night,
• A (30%) chance of showers Tuesday, mostly cloudy with a good (50%) chance of rain Tuesday night,
• Cloudy with a good (50%) chance of rain Wednesday, rain likely (70%) at night,
• Then cloudy and a bit warmer with a good (50%) chance of rain Thursday.
• highs 45-47 lows near 36. (seasonal averages high 46 low 34)

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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.

Advisory Courtesy of Lane Regional Air Protection Agency (LRAPA).

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Forecast for Roseburg:

• Mostly cloudy with showers and a slight (20%) chance of thunderstorms this evening (0.45 in. of rain possible, AM snow level 3,500 ft), showers likely (70%) with a slight (20) chance of isolated thunderstorms late tonight (0.20 in. of rain possible, small hail possible, snow level 3,500 ft. falling to 3,000 ft. late),
• Mostly cloudy with showers Friday (0.55 in. of rain possible, snow level 3,000 ft. rising to 3,500 ft. in the afternoon), evening showers, showers likely (70%) late Friday night (0.20 in. of rain possible, snow level 3,000 ft. late).
• Then mostly cloudy with rain (0.50 in. of rain possible) Saturday (AM snow level 3,500 ft.), rain late Saturday night (0.95 in. of rain possible), possibly heavy at times,
• Mostly cloudy with rain and a bit cooler Sunday, then rain and snow showers and colder late Sunday night.
• lows 42-35 highs 49-52 cooling to 45 Sunday.
• Cloudy with a (40%) chance of rain and snow showers Monday, a slight (20%) chance of rain and snow showers Monday night through Tuesday night,
• Mostly cloudy with a (30%) chance of rain and snow showers Wednesday AM, a good (50%) chance of afternoon showers, showers likely (70%) Wednesday night,
• Cloudy with a (40%) chance of showers Thursday AM, then a (30%) chance of rain in the afternoon.
• highs near 45 lows 32-38. (seasonal averages high 48 low 37)

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Forecast for the South Oregon Coast including Coos Bay and North Bend:

• Mostly cloudy with showers and a slight (20%) chance of thunderstorms this evening, showers and isolated thunderstorms late tonight (0.25 in. of rain possible),
• Showers Friday (0.75 in. of rain possible) and in the evening, showers likely (70%) late Friday night (0.20 in. of rain possible),
• Mostly cloudy and a bit warmer with rain Saturday, possibly heavy at times in the afternoon (1.25 in. of rain possible), and breezy (Wind: S 10-15 mph increasing to S 15-25 mph in the afternoon at the shore while S 10-15 mph inland), rain Saturday night (1.20 in. of rain possible) and Sunday (a bit cooler), then showers with a slight (20%) chance of thunderstorms Sunday night (1.25 in. of rain possible).
• lows 45-42 highs 50-55 cooling back to 50 Sunday.
• Cloudy with showers likely (70%) Monday, a slight (20%) chance of showers Monday night through Tuesday night,
• Showers likely (70%) Wednesday and Wednesday night,
• Cloudy with a (40%) chance of showers AM showers, then a (30%) chance of rain Thursday.
• highs 49-52 lows 40-42. (seasonal averages high 51 low 40).

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Forecast for the Cascades in Lane County:

• Mostly cloudy with rain and snow showers tonight (0.25 in. of rain possible, 1-3 in. of snow possible),
• Rain and snow showers Friday (0.50 in. of rain possible, 3-7 in. of snow possible) and breezy (Wind: S 5-15 mph gusts to 30 mph increasing to S 15-25 mph gusts to 45 mph), rain and snow showers at night (0.50 in. of rain possible, 2-5 in. of snow possible),
• Mostly cloudy and a bit warmer with rain and snow Saturday (snow possibly heavy at times in the evening), rain and snow Saturday night and breezy (Wind: SW 15-25 mph gusts to 40 mph, decreasing to SW 10-15 mph gusts to 30 mph),
• Rain and snow in the AM, rain and snow showers and a bit cooler Sunday afternoon, then snow showers likely (70%) Sunday night.
• snow level 3,500 ft. tonight, 3,000 ft. Friday, 3,500 ft. Friday night, 3,000 ft. Saturday, 5,500 ft. Saturday night, 3,500 ft. Sunday, then at the surface Sunday night.
• lows near 28 highs 32-36 cooling to near 30 Sunday.
• Mostly cloudy with snow showers likely (70%) and a bit cooler Monday, cloudy with a (40%) chance of snow showers at night,
• Mostly cloudy with a good (50%) chance of snow showers Tuesday, then cloudy with a good (50%) chance of snow Tuesday night,
• Rain and snow likely (70%) Wednesday and Wednesday night,
• Then cloudy and a bit warmer with a good (50%) chance of rain and snow Thursday.
• snow level at the surface Monday through Tuesday, 2,500 ft. Tuesday night, 3,000 ft. Wednesday, 3,500 ft. Wednesday night, then 5,000 ft. Thursday.
• highs 28-35 lows 20-24.

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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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