Here is my new weekly weather quiz question. What is the “water equivalent?” 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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Onshore airflow from a high pressure ridge (Shaded “Arch” shape with blue arrows) will cool our temperatures a bit and hold them steady for a while. A cold front will move through by the end of the week bringing the chance of some much needed showers with it.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 33 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 84 in the Moderate category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 36 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. 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.
• A HEALTH ADVISORY CONTINUES FOR SEAL ROCK STATE PARK BEACH 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 sunny today, mostly clear tonight,
• Mostly sunny Wednesday, partly cloudy at night and Thursday, then mostly cloudy late Thursday night.
• highs 85-88 cooling back to 85 Thursday lows 50-58.
• Mostly cloudy with slight (20%) chance of AM rain, a bit cooler with a (30%) chance of showers Friday afternoon and Friday night,
• Mostly cloudy and a bit cooler with a good (50%) chance of showers Saturday and at night,
• Mostly cloudy with a (40%) chance of showers and a bit warmer Sunday and Sunday night,
• Then mostly cloudy with a (30%) chance of showers Monday.
• highs 79-74warming to 77 Monday lows 57-55. (seasonal averages high 82 low 50)

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Forecast for the Umpqua Basin including Roseburg:

• Sunny with patchy smoke this afternoon, mostly clear tonight,
• Sunny in the AM, partly cloudy Wednesday afternoon and evening, mostly cloudy late at night,
• Then just mostly cloudy, areas of afternoon and evening smoke, Thursday and Thursday night.
• highs near 88 lows 57-59.
• Mostly cloudy and a bit cooler with a slight (20%) chance showers Friday afternoon, rain likely (60%) Friday night and Saturday, a (40%) chance of showers Saturday night through Sunday night,
• Then mostly cloudy with a slight (20%) chance of showers Monday.
• highs 83-79 lows near 58. (seasonal averages high 84 low 55)

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

• Sunny this afternoon with patchy inland smoke, mostly clear this evening, mostly cloudy late tonight,
• Partly cloudy Wednesday with patchy AM fog, mostly cloudy in the afternoon, partly cloudy in the evening, mostly cloudy with a slight (20%) chance of showers and patchy fog late Wednesday night,
• Patchy AM fog, mostly cloudy Thursday afternoon, then mostly cloudy with a slight (20%) chance of showers Thursday night.
• highs near 66 lows near 55.
• Mostly cloudy with a slight (20%) chance of showers Friday, mostly cloudy with rain likely (60%) at night and Saturday, then mostly cloudy with a (30%) chance of showers Saturday night through Monday.
• highs near 65-68 lows near 56. (seasonal averages high 66 low 53).

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Forecast for the Cascades in Lane County:

• Mostly sunny this afternoon, partly cloudy with a slight (20%) chance of showers and thunderstorms in the evening, just partly cloudy late at night,
• Mostly sunny with a slight (20%) chance of showers and thunderstorms Wednesday afternoon, partly cloudy with a slight (20%) chance of showers and thunderstorms in the evening, just partly cloudy late at night,
• Partly cloudy and a bit cooler with a slight (20%) chance of showers and thunderstorms Thursday afternoon and evening, then just mostly cloudy late Thursday night.
• free air freezing level 13,000 ft. today, snow level above 8,000 ft.  tonight through Thursday night.
• highs 78-74 lows near 48.
• Mostly cloudy and a bit cooler with a (40%) chance of showers Friday afternoon and at night,
• Mostly cloudy, breezy and cooler with a (40%) chance of showers Saturday and Saturday night,
• A mix of clouds and sun with a (40%) chance of showers Sunday, partly cloudy with a (40%) chance of evening showers, mostly cloudy with a (40%) chance of showers Sunday night,
• Mostly cloudy and a bit warmer with a (30%) chance of showers Monday.
• snow level above 8,000 ft. Friday through Monday.
• highs 67-62 lows 45-43.

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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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