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 7 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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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 TODAY FOR THE NORTH OREGON COAST AND THE CENTRAL OREGON COAST.
• A COASTAL FLOOD ADVISORY IS IN EFFECT FROM 9 AM UNTIL 3 PM SATURDAY FOR THE NORTH OREGON COAST AND THE CENTRAL OREGON COAST.
• A FLOOD WATCH IS IN EFFECT THROUGH SUNDAY EVENING FOR THE NORTH OREGON COAST AND THE CENTRAL OREGON COAST.
• A FLOOD WATCH IS IN EFFECT FROM LATE SATURDAY NIGHT THROUGH SUNDAY EVENING FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, AND JACKSON COUNTY.
• A WIND ADVISORY IS IN EFFECT FROM NOON UNTIL 8PM TODAY FOR THE CENTRAL WILLAMETTE VALLEY AND THE SOUTH WILLAMETTE VALLEY.
• A WIND ADVISORY IS IN EFFECT FROM 5 PM THIS AFTERNOON UNTIL MIDNIGHT TONIGHT FOR NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL AND EASTERN LAKE COUNTY.
• A HIGH WIND WATCH IS IN EFFECT FROM SATURDAY AFTERNOON THROUGH SUNDAY MORNING FOR NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL AND EASTERN LAKE COUNTY.
• A WINTER STORM WATCH IS IN EFFECT FROM SATURDAY AFTERNOON THROUGH SUNDAY MORNING FOR THE NORTH OREGON CASCADES AND THE CASCADES IN LANE COUNTY.
• A WINTER STORM WATCH IS IN EFFECT FROM SATURDAY MORNING THROUGH SUNDAY AFTERNOON FOR THE SOUTH CENTRAL OREGON CASCADES, THE SOUTH OREGON CASCADES, AND THE SISKIYOU MOUNTAINS.
• A WINTER WEATHER ADVISORY IS IN EFFECT FROM NOON TODAY UNTIL MIDNIGHT TONIGHT ABOVE 4,000 FT. FOR THE CASCADES IN LANE COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 10 PM TONIGHT ABOVE 4,000 FT. FOR THE SOUTH CENTRAL OREGON CASCADES, THE SOUTH OREGON CASCADES, AND THE SISKIYOU MOUNTAINS.
• 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:

• Showers today (0.50 in. of rain possible) and windy (Wind: S 20-30 mph gusts to 50 mph in the afternoon), cloudy with evening showers, a good (50%) chance of showers late tonight (0.10 in. of rain possible),
• Mostly cloudy with rain Saturday (0.75 in. of rain possible) and windy (Wind: S 10-15 mph increasing to S 20-30 mph in the afternoon), rain Saturday night (1.25 in. of rain possible),
• Mostly cloudy with showers and a bit cooler Sunday, then a good (50%) chance of showers Sunday night.
• highs 48-45 lows 42-36.
• Mostly cloudy with a good (50%) chance of showers Monday, a slight (20%) 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 and Thursday, rain likely (70%) Wednesday 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 today (0.55 in. of rain possible, snow level 3,000 ft. in the afternoon) and a slight (20%) chance of thunderstorms, evening showers, a good (50%) chance of showers late tonight (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, possibly heavy at times, late Saturday night (0.95 in. of rain possible),
• Mostly cloudy with AM rain, showers and a bit cooler Sunday afternoon (snow level 3,000 ft. falling to 2,500 ft. in the afternoon, rain and snow showers and a slight (20%) chance of thunderstorms in the evening, rain and snow showers and colder late Sunday night.
• highs 49-52 cooling to 45 Sunday lows 42-35.
• Cloudy with rain and snow showers likely (70%) 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:

• Showers today (0.75 in. of rain possible) with a slight (20%) chance of isolated thunderstorms (small hail possible), cloudy with evening showers, a good (50%) of showers late tonight (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: SW 10-15 mph shifting to S 15-25 mph gusts to 40 mph late morning and in the afternoon), rain, possibly heavy at times, Saturday night (1.20 in. of rain possible) and Sunday AM, a bit cooler with showers with a slight (20%) chance of thunderstorms in the afternoon and evening (small hail possible), showers likely (70%) with a slight (20%) chance of thunderstorms late Sunday night (1.25 in. of rain possible).
• highs 50-55 cooling back to 50 Sunday lows 46-42.
• Cloudy with showers likely (70%) Monday, mostly cloudy with 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 afternoon.
• highs 49-52 lows 40-42. (seasonal averages high 51 low 40).

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Forecast for the Cascades in Lane County:

• Rain and snow showers today (0.50 in. of rain possible, 4-7 in. of snow possible) and breezy (Wind: SW 15-25 mph gusts to 40 mph), rain and snow showers tonight (0.50 in. of rain possible, 2-5 in. of snow possible),
• Mostly cloudy and a bit warmer with rain and snow Saturday (1.0 in. of rain possible, 5-9 in. of snow possible, snow possibly heavy at times in the evening), rain and snow Saturday night and breezy (Wind: SW 10-20 mph increasing to S 20-30 mph in the afternoon gusts to 40 mph),
• Rain and snow showers and a bit cooler Sunday afternoon, then snow showers likely (70%) Sunday night.
• snow level 3,000 ft. today, 3,500 ft. tonight, 3,000 ft. Saturday, 5,000 ft. Saturday night, 3,000 ft. Sunday, then 2,500 ft. Sunday night.
• highs 32-36 cooling back to 32 Sunday lows 27-22.
• 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, cloudy with a (40%) 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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