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 55 in the Moderate category measuring Particulate Matter.

Oakridge: The Air Quality Index is 153 in the Unhealthy category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 80 in the Moderate 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 RED FLAG WARNING IS IN EFFECT FOR HOT, DRY UNSTABLE CONDITIONS UNTIL 9 PM THIS EVENING FOR THE SOUTHERN BLUE AND STRAWBERRY MOUNTAINS, THE NORTHERN BLUE MOUNTAINS, AND THE CENTRAL BLUE MOUNTAINS.
• A FIRE WEATHER WATCH IS IN EFFECT FOR STRONG GUSTY WINDS AND LOW RELATIVE HUMIDITY UNTIL 9 PM THIS EVENING FOR THE KLAMATH BASIN AND THE FREMONT-WINEMA NATIONAL FOREST.
• 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:

• Partly cloudy tonight,
• Mostly sunny Tuesday, clear in the evening, partly cloudy at night,
• Mostly sunny Wednesday AM, partly cloudy in the afternoon through Thursday evening, then mostly cloudy late Thursday night.
• lows 48-58 highs 86-84.
• Partly cloudy 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 Sunday and Sunday night,
• Then mostly cloudy with a (30%) chance of showers Monday.
• highs 82-78 lows 57-55. (seasonal averages high 82 low 50)

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Forecast for the Umpqua Basin including Roseburg:

• Partly cloudy with a slight (20%) chance of thunderstorms this evening, just mostly clear late tonight,
• Partly cloudy Tuesday AM, sunny in the afternoon, mostly clear at night,
• Sunny in the AM, partly cloudy Wednesday afternoon and evening, mostly cloudy with a slight (20%) chance of showers late at night,
• Then just mostly cloudy Thursday and Thursday night.
• lows 56-59 highs near 88.
• Mostly cloudy with a (30%) chance showers Friday through Sunday night,
• Then mostly cloudy with a slight (20%) chance of showers Monday.
• highs 83-79 warming to 84 Monday 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:

• Partly cloudy with patchy fog late tonight,
• Mostly cloudy with patchy AM fog, sunny Tuesday afternoon, mostly clear in the evening, clouds increasing to mostly cloudy late at night,
• Partly cloudy Wednesday with patchy AM fog, partly cloudy in the evening, mostly cloudy with a slight (20%) chance of showers late Wednesday night,
• Mostly cloudy Thursday, then mostly cloudy with a slight (20%) chance of showers late Thursday night.
• lows near 55 highs near 66.
• Then mostly cloudy with a (40%) chance of showers Friday 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:

• Partly cloudy with a slight (20%) chance of showers and thunderstorms this evening, just partly cloudy late tonight,
• Mostly sunny in the AM, partly cloudy and a bit cooler with a slight (20%) chance of showers and thunderstorms in the afternoon and evening, just partly cloudy late at night both Tuesday and Wednesday,
• Partly cloudy with a slight (20%) chance of showers and thunderstorms Thursday afternoon and evening, then just mostly cloudy late Thursday night.
• snow level above 8,000 ft. tonight through Thursday night.
• lows near 48 highs 75-78 cooling back to 75 Thursday.
• Partly cloudy and a bit cooler with a slight (20%) chance of showers Friday afternoon, mostly cloudy with a (40%) chance of showers Friday night through 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 70-64 warming to 67 Monday 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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