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Check out my latest Eugene Daily News Weather Or Not Column “A Shooting Star Bonanza”

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And don’t forget my latest feature story in the continuing series on service club organizations called Who Are The Soroptimists And What Are They Doing?

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No winner this week. Here is my weekly weather quiz question for the last time. What is a “Shortwave?”  And I don’t mean a type of radio. Here is the correct answer. A Shortwave, also known as Shortwave Trough; a disturbance in the mid or upper part of the atmosphere which induces upward motion ahead of it. If other conditions are favorable, the upward motion can contribute to thunderstorm development ahead of a shortwave. 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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There are two upper level lows that will be controlling our weather for a while. One upper level low (“Oval” shape in blue arrows off southern California) has induced high pressure over us that will keep the air trapped over us for rapid heating. The low will move to the north and east over us, cooling us a bit. The second low is off the Pacific Northwest (shaded “U” shape with blue arrows) and it will move through later. A frontal system (shown offshore on this forecast map) looks like it is preparing to visit the Pacific Northwest Tuesday, with the help of the upper level low to our northwest, bringing the chance of thunderstorms just ahead of and behind it. The Perseid Meteor shower will peak Tuesday night.

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Advisories:

• A HEAT ADVISORY IS IN EFFECT UNTIL 9 PM MONDAY FOR THE COAST RANGE OF NORTHWEST OREGON, THE CENTRAL COAST RANGE OF WESTERN OREGON, THE LOWER COLUMBIA, THE GREATER PORTLAND METRO AREA, THE CENTRAL WILLAMETTE VALLEY, THE SOUTH WILLAMETTE VALLEY, THE WESTERN COLUMBIA RIVER GORGE, THE CENTRAL COLUMBIA RIVER GORGE, THE HOOD RIVER VALLEY, THE NORTHERN OREGON CASCADE FOOTHILLS, THE CASCADE FOOTHILLS IN LANE COUNTY, AND THE UPPER HOOD RIVER VALLEY.
• A RED FLAG WARNING IS IN EFFECT FROM UNTIL 11 PM TUESDAY FOR ABUNDANT LIGHTNING WITH DRY FUELS FOR ALL OF WESTERN OREGON INCLUDING THE FORESTED MOUNTAIN, BUT EXCLUDING THE IMMEDIATE COASTAL AREAS.
• THE HEALTH ADVISORY FOR SEAL ROCK BEACH IN LINCOLN COUNTY HAS BEEN LIFTED.
• THE BLUE-GREEN ALGAE ADVISORY FOR ODELL LAKE HAS BEEN LIFTED. THE LEVEL OF CYANOTOXIN FOUND IN ODEL LAKE IN KLAMATH COUNTY HAVE DROPPED ENOUGH FOR THE HEALTH ADVISORY CANCEL THE ADVISORY.
• A HEALTH ADVISORY HAS BEEN ISSUED FOR THE PRESENCE OF HIGHER-THAN-NORMAL FECAL BACTERIA  AT MILL BEACH IN CURRY COUNTY. DIRECT CONTACT WITH THE SURF OR WATER RUNNING INTO THE  SURF IN THIS AREA SHOULD BE AVOIDED UNTIL THE ADVISORY IS LIFTED, ESPECIALLY FOR CHILDREN AND THE ELDERLY, WHO MAY BE MORE VULNERABLE TO WATERBORNE BACTERIA.
• A HEALTH ADVISORY HAS BEEN ISSUED FOR THE PRESENCE OF BLUE-GREEN ALGAE FOR WALTERVILLE POND IN LANE COUNTY AND AT DEVILS LAKE IN LINCOLN COUNTY. THE TOXIC ALGAE BLOOM MEANS THAT PEOPLE SHOULD NOT HAVE DIRECT CONTACT WITH THE AFFECTED WATER AND THAT ALSO GOES FOR ANY PETS.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 46 in the Good category measuring Ozone at Delight Valley School, Saginaw. Data courtesy of Lane Regional Air Protection Agency (LRAPA)

Oakridge: The Air Quality Index is 33 in the Good category measuring Particulate Matter at Willamette Activity Center, Oakridge. Data courtesy of Lane Regional Air Protection Agency (LRAPA)

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Eugene-Springfield Pollen Count:

Grass………. Moderate (6)

Trees………. Absent (0)

Last Counted: 8/6/14

Data Courtesy of Oregon Allergy Associates

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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 and thunderstorms tonight,
• Partly cloudy with a (30%) chance of showers and thunderstorms Monday afternoon, showers and thunderstorms likely (60%) in the evening, a slight (20%) chance of showers and thunderstorms late at night,
• Partly cloudy and cooler with a slight (20%) chance of showers and thunderstorms Tuesday, and in the evening, a slight (20%) chance of showers late at night,
• A mix of clouds and sun with a (40%) chance of showers and a slight (20%) chance of thunderstorms Wednesday afternoon, partly cloudy with slight (20%) of showers and thunderstorms in the evening, mostly cloudy with a slight (20%) chance of showers late Wednesday night.
• lows 63-54 highs 92-79.
• Mostly cloudy with a slight (20%) chance of showers Thursday, partly cloudy in the afternoon and Thursday night,
• A mix of clouds and sun Friday AM, mostly sunny in the afternoon, partly cloudy Friday night and Saturday AM, then mostly sunny Saturday afternoon and Sunday, partly cloudy Saturday night.
• highs 80-86 lows near 53. (seasonal averages high 84 low 52)

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Forecast for the Umpqua Basin including Roseburg:

• Mostly cloudy with scattered dry thunderstorms tonight,
• Mostly cloudy in the AM and partly cloudy Monday afternoon with scattered dry thunderstorms continuing in the evening, isolated dry thunderstorms late at night,
• Partly cloudy with a slight (20%) chance of thunderstorms Tuesday and in the evening, mostly cloudy with a slight (20%) chance of thunderstorms Tuesday night,
• Mostly cloudy with a slight (20%) chance of thunderstorms cooler Wednesday and in the evening, mostly clear late at night.
• lows 66-58 highs 96-79.
• Mostly sunny Thursday, Friday, and Saturday, mostly clear each night,
• Then sunny Sunday.
• highs 80-89 lows near 58. (seasonal averages high 86 low 56)

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

• Partly cloudy this evening with dry (thunder and lightning without significant rainfall) coastal thunderstorms tonight, mostly cloudy at night with a isolated dry thunderstorms inland this evening,  scattered dry thunderstorms late tonight,
• Mostly cloudy with scattered dry thunderstorms Monday AM, scattered dry thunderstorms in the afternoon and evening, isolated dry thunderstorms late Monday night,
• Mostly cloudy with a slight (20%) chance of AM thunderstorms, partly cloudy Tuesday afternoon and evening, mostly cloudy late Tuesday night.
• lows near 55 highs near 64.
• Mostly cloudy with a slight (20%) chance of thunderstorms Wednesday afternoon and in the evening, partly cloudy late Wednesday night,
• Partly cloudy Thursday through Friday AM, sunny Friday afternoon, mostly clear at night,
• Mostly sunny Saturday, then partly cloudy Saturday night and Sunday.
• highs near 64 lows near 55. (seasonal averages high 65 low 53)

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Forecast for the Cascades in Lane County:

• Partly cloudy with a (40%) chance of showers and thunderstorms tonight (under 0.10 in. of rain possible, more possible in storms),
• A mix of clouds and sun with a slight (20%) chance of showers and thunderstorms Monday AM, showers and thunderstorms likely (60%) in the afternoon, partly cloudy with a good (50%) chance of showers and thunderstorms in the evening, mostly cloudy with a good (50%) chance of showers Monday night,
• A mix of clouds and sun with a (40%) chance of showers and thunderstorms Tuesday, partly cloudy with a (30%) chance of showers in the evening, a slight (20%) chance of showers and thunderstorms at night.
• snow level above 8,000 ft. tonight through Wednesday night.
• lows 56-46 highs 83-66.
• A mix of clouds and sun with a slight (20%) chance of showers and thunderstorms Wednesday AM, a (30%) chance of showers and thunderstorms in the afternoon, partly cloudy with a (30%) chance of showers and thunderstorms in the evening, a slight (20%) chance of showers and thunderstorms late Wednesday night,
• Partly cloudy with a slight (20%) chance of showers and thunderstorms Thursday and in the evening, just partly cloudy Thursday night,
• Then mostly sunny Friday, Saturday, and Sunday mostly clear at night.
• snow level above 8,000 ft. Thursday and Thursday night, free air freezing level 15,000 ft. Friday and Friday night, then 16,000 ft. Saturday through Sunday.
• highs 68-75 lows 47-50.

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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 Eugene Daily News.com.

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