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) continues to control our weather. Another frontal system (Position shown is Wednesday) will keep our temperatures cooler than normal and keep the chance for rain with us also.

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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 6 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 27 in the Good category measuring Particulate Matter.

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

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Advisories:

• 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 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. 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:

• Partly cloudy with a slight (20%) chance of showers this evening, just mostly cloudy late tonight through Monday evening, mostly cloudy late Monday night,
• Mostly cloudy with a slight (20%) chance of AM rain Tuesday a good (50%) chance of rain and a bit cooler in the afternoon (under 0.10 in. of rain possible), a (40%) chance of showers Tuesday night (under 0.10 in. of rain possible),
•  Mostly cloudy with a (30%) chance of showers Wednesday AM, a slight (20%) chance of afternoon and evening showers, then partly cloudy with a slight (20%) chance of showers late Wednesday night.
• lows 52-55 cooling to 48 Wednesday night highs 77-70.
• A mix of clouds and sun with a slight (20%) chance of showers Thursday, partly cloudy with a slight (20%) chance of showers in the evening, a (30%) chance of showers late Thursday night and Friday AM, a slight (20%) chance of showers  in the afternoon, just partly cloudy late Friday night,
• Then mostly sunny and and a bit warmer Saturday and Sunday, partly cloudy Saturday night.
• highs 70-77 lows near 48. (seasonal averages high 81 low 50)

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Forecast for the Umpqua Basin including Roseburg:

• Mostly cloudy with a slight (20%) chance of showers this evening, just mostly cloudy late tonight,
• Sunny and a bit warmer Monday, mostly clear in the evening, partly cloudy late Monday night,
• Partly cloudy and a bit cooler with a slight (20%) chance of rain Tuesday afternoon, mostly cloudy with a (30%) chance of showers Tuesday night (under 0.10 in. of rain possible),
• Mostly cloudy with a slight (20%) chance of showers and cooler Wednesday, then partly cloudy late Wednesday night.
• lows 53-57 cooling to 50 Wednesday night highs 79-70.
• Partly cloudy Thursday, partly cloudy with a slight (20%) chance of showers late Thursday night through Friday evening, just partly cloudy Friday night,
• Mostly sunny and  warmer Saturday, mostly clear at night,
• Then sunny and warmer Sunday.
• highs 72-80 lows near 50. (seasonal averages high 83 low 54)

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

• Mostly cloudy this evening, just partly cloudy late tonight and Monday AM, sunny in the afternoon, mostly cloudy late Monday night,
• Mostly cloudy and a bit cooler with a slight (20%) chance of coastal rain  Tuesday while partly cloudy inland in the AM and mostly cloudy with a slight (20%) chance of inland showers in the afternoon (under 0.10 in. of rain possible), then partly cloudy with a (30%) chance of showers Tuesday night (under 0.10 in. of rain possible),
• Mostly cloudy with a slight (20%) chance of showers Wednesday AM, then partly cloudy and a bit cooler in the afternoon and Wednesday night.
• lows 54-56 cooling to 52 Wednesday night highs 68-64.
• Partly cloudy Thursday, partly cloudy with a slight (20%) chance of showers Thursday night and Friday, partly cloudy Friday night,
• Then mostly sunny and a bit warmer Saturday and Sunday, mostly clear Saturday night.
• highs 65-70 lows 50-52. (seasonal averages high 66 low 52).

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Forecast for the Cascades in Lane County:

• Mostly cloudy with a slight (20%) of showers this evening,  just partly cloudy late tonight through Tuesday AM, mostly cloudy and cooler with a slight (20%) chance of rain in the afternoon, a (40%) chance of showers Tuesday night,
• Mostly cloudy and a bit cooler with a good (50%) chance of showers Wednesday AM, a slight (20%) chance of afternoon and evening showers, then partly cloudy with a slight (20%) chance of showers late Wednesday night.
• snow level above 8,000 ft. tonight, free air freezing level 13,000 ft. Monday and Monday night, snow level above 8,000 ft. Tuesday and Tuesday night, 7,000 ft. Wednesday, then 7,500 ft. Wednesday night.
• lows 42-44 cooling to 38 Wednesday night highs 64-57.
• Partly cloudy with a bit cooler with a slight (20%) chance of showers Thursday through Friday AM, a (40%) chance of showers and a bit warmer in the afternoon and evening, just partly cloudy Friday night,
• Partly cloudy Saturday AM, mostly sunny and a bit warmer in the afternoon, partly cloudy at night,
• Then mostly sunny and a bit warmer Sunday.
• snow level above 6,500 ft. Thursday and Thursday night, 7,000 ft. Friday and Friday night, free air freezing level 9,000 ft. Saturday, then 11,000 ft. Saturday night and Sunday.
• highs 56-65 lows 38-40.

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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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