Here is my weekly weather quiz question for the last time. What is the “water equivalent?” Here is the correct answer.Water Equivalent is the liquid content of solid precipitation that has accumulated on the ground (snow depth). The accumulation may consist of snow, ice formed by freezing precipitation, freezing liquid precipitation, or ice formed by the refreezing of melted snow. I’ll have a new weekly weather quiz question for you starting Monday. 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 (Shaded “U” shape with blue arrows) is moving toward the Pacific Northwest and sends a frontal system through bringing clouds and some much needed rain with it. The first wave missed us. More fronts will continue the rain chances like this cold front that approaches the coast Monday. Remember that it has been very dry for a long time so the roads will be especially slippery when the rain gets started. The water brings up the oil from the pavement making the roadway slick. Once it rains enough the slipperiness will decrease.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 28 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 29 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 29 in the Good category measuring Particulate Matter.

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

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Advisories:

• A HIGH WIND WARNING IS IN EFFECT FROM 4 AM UNTIL 1 PM TODAY FOR THE CENTRAL OREGON COAST,
• A HIGH WIND WARNING IS IN EFFECT FROM 5 AM UNTIL NOON TODAY FOR THE CENTRAL COAST RANGE OF OREGON,
• A HIGH WIND WARNING IS IN EFFECT FROM 6 AM UNTIL 2 PM TODAY FOR THE NORTH OREGON COAST AND THE COAST RANGE OF NORTHWEST OREGON.
• A HIGH WIND WARNING IS IN EFFECT FROM 2 AM UNTIL 2 PM TODAY FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
• A HIGH SURF ADVISORY IS IN EFFECT FROM 5 AM UNTIL 5 PM TODAY FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
• A WIND ADVISORY IS IN EFFECT FROM 8 AM UNTIL 3 PM TODAY FOR THE LOWER COLUMBIA BASIN, THE GREATER PORTLAND METRO AREA, THE FOOTHILLS OF THE NORTHERN BLUE MOUNTAINS, THE SOUTHERN BLUE MOUNTAINS, NORTH CENTRAL OREGON AND CENTRAL OREGON.
• A WIND ADVISORY IS IN EFFECT FROM 6 AM UNTIL NOON TODAY FOR THE CENTRAL WILLAMETTE VALLEY AND THE SOUTH WILLAMETTE VALLEY.
• A WIND ADVISORY IS IN EFFECT FROM 2 AM UNTIL 5 PM SATURDAY FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, WESTERN, CENTRAL AND EASTERN LAKE COUNTY,
• AN AIR QUALITY ALERT HAS BEEN ISSUED UNTIL FURTHER NOTICE FOR CROOK, DESCHUTES, GILLIAM, GRANT, JEFFERSON, MONROE, SHERMAN, UMATILLA, UNION, WILLOWA, WASCO, WHEELER, BENTON AND COLUMBIA COUNTIES IN OREGON.
• A HEALTH ADVISORY HAS BEEN LIFTED FOR SEAL ROCK STATE PARK BEACH. TESTING SHOWS FECAL BACTERIA LEVELS HAVE SUBSIDED.
• 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.
• A HEALTH ADVISORY CONTINUES FOR UPPER KLAMATH LAKE AND AGENCY LAKE DOWN TO KENO DAM, LOCATED JUST NORTH OF KLAMATH FALLS ALONG HIGHWAY 97 IN KLAMATH COUNTY. THE SECTION FROM THE KENO DAM TO THE CALIFORNIA BORDER HAS BEEN CLEARED FOR USE. WATER MONITORING BY THE USGS HAS CONFIRMED THE PRESENCE OF BLUE-GREEN ALGAE TOXINS WHICH CAN BE HARMFUL TO HUMANS AND ANIMALS. SWALLOWING, INHALING OR SKIN CONTACT WITH WATER DROPLETS SHOULD BE AVOIDED.

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

• Cloudy with AM rain likely (60%) and a slight (20%) chance of thunderstorms, cooler with a good (50%) chance of showers this afternoon, windy (Wind: S 15-25 mph AM gusts 30-40 mph and cooler (0.25 in. of rain possible), cloudy with good (50%) chance of rain this evening, rain late tonight (0.25 in. of rain possible),
• Mostly cloudy and cooler with a good (50%) chance of showers Sunday (0.25 in. of rain possible), a slight (20%) chance of showers in the evening, just mostly cloudy Sunday night,
• A mix of clouds and sun and a bit warmer with a slight (20%) chance of showers Monday, mostly cloudy with a slight (20%) chance of showers in the evening, a (40%) chance of showers late Monday night.
• highs 77-73 warming to 75 Monday lows 56-53 warming to 55 Monday night.
• Mostly cloudy and a bit cooler with a good (50%) chance of showers Tuesday through Wednesday, a (40%) chance of evening showers, partly cloudy with a slight (20%) chance of showers late Wednesday night,
• A mix of clouds and sun with a slight (20%) chance of showers Thursday, partly cloudy with a slight (20%) chance of showers Thursday night and Friday AM, then partly cloudy and a bit warmer in the afternoon.
• highs 73-70 warming back to 73 Friday lows 54-50. (seasonal averages high 81 low 50)

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Forecast for the Umpqua Basin including Roseburg:

• Mostly cloudy with rain likely (70%) this AM, a good (50%) chance of showers and a bit cooler this afternoon (0.10 in. of rain possible) and breezy (Wind: S 15-25 mph), mostly cloudy with a (30%) chance of showers tonight (under 0.10 in. of rain possible),
• Mostly cloudy and a bit cooler with a (30%) chance of showers Sunday, a slight (20%) chance of showers in the evening, mostly cloudy at night,
• Then partly cloudy and a bit warmer Monday and Monday night.
• highs 77-74 warming to 78 Monday lows 58-52.
• Mostly cloudy and a bit cooler with a good (50%) chance of showers Tuesday through Wednesday, a (40%) chance of showers in the evening, partly cloudy with a slight (20%) chance of showers late Wednesday night,
• Partly cloudy and a bit warmer Thursday through Friday.
• highs 76-80 lows 54-50. (seasonal averages high 83 low 54)

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

• Cloudy with rain this AM, a (40%) chance of showers this afternoon (0.15 in. of rain possible) and windy (Wind: S 25-35 mph decreasing to S 20-25 mph in the afternoon at the shore while S 15-25 mph inland), a good (50%) chance of evening showers, showers late tonight (0.20 in. of rain possible),
• Mostly cloudy with a good (50%) chance of showers Sunday (under 0.10 in. of rain possible), a slight (20%) chance of showers in the evening, just mostly cloudy Sunday night,
• Partly cloudy and a bit warmer Monday and in the evening, then mostly cloudy with a slight (20%) chance of showers late Monday night.
• highs 65-69 lows 58-54.
• Mostly cloudy and a bit cooler with a (40%) chance of showers Tuesday through Wednesday, a slight (20%) chance of evening showers, just partly cloudy late Wednesday night,
• Then partly cloudy Thursday through Friday.
• highs near 68 lows 56-52. (seasonal averages high 66 low 52).

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Forecast for the Cascades in Lane County:

• Mostly cloudy today with AM rain, a mix of clouds and sun and a bit cooler with a good (50%) chance of showers and windy (Wind: SW 15-25 mph gusts to 40 mph) and cooler this afternoon, a slight (20%) chance of evening rain, a good (50%) chance of rain late tonight,
• Mostly cloudy with AM showers likely (60%), partly cloudy and a bit warmer with a good (50%) chance of showers Sunday afternoon, partly cloudy with a slight (20%) chance of evening showers, just partly cloudy late Sunday night and Monday, then a (40%) chance of showers late Monday night.
• snow level above 8,000 ft. today through Sunday night, free air freezing level 13,000 ft. Monday, snow level above 8,000 ft. Monday night.
• highs 59-62 lows 44-42.
• A mix of clouds and sun and a bit cooler Tuesday with a good (50%) chance of showers in the afternoon, partly cloudy with a good (50%) chance of showers in the evening, mostly cloudy with a good (50%) chance of showers late Tuesday night,
• Mostly cloudy and a bit cooler with a good (50%) chance of showers Wednesday, a (40%) chance of evening showers, a slight (20%) chance of showers late Wednesday night,
• A mix of clouds and sun and a bit warmer with a slight (20%) chance of showers Thursday, then partly cloudy with a slight (20%) chance of showers Thursday night and Friday.
• snow level above 8,000 ft. Tuesday and Tuesday night, 7,500 ft. Wednesday, 7,000 ft. Wednesday night, 6,500 ft. Thursday, then above 8,000 ft. Thursday night and Friday.
• highs 59-56 warming to 60 Thursday lows 44-39.

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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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