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Check out my latest Eugene Daily News Weather Or Not Column A Perfect Day In Every Way.

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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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Here is my new weekly weather quiz question. What is a “macroburst?”  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 trough of low pressure  (Shaded “U” shape with blue arrows) is moving from west to east through Washington and keeps the chance of mountain thunderstorms alive. Another low is sitting off the coast of California (“U” shape with blue arrows) and it will move to the north and east  increasing the chances for another round of mountain showers and thunderstorms. Temperatures will rise again as the Oregon Country Fair continues. There will be a slight chance of showers and thunderstorms on Sunday.

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Advisories:

• A HEAT ADVISORY IS IN EFFECT FROM 5 AM SATURDAY UNTIL 2 PM TUESDAY FOR THE COAST RANGE OF NORTHWEST OREGON, THE CENTRAL COAST RANGE OF WESTERN OREGON, THE GREATER PORTLAND METRO AREA, THE CENTRAL WILLAMETTE VALLEY, THE SOUTH WILLAMETTE VALLEY, THE WESTERN COLUMBIA RIVER GORGE, THE CENTRAL COLUMBIA GORGE, THE NORTH OREGON CASCADE FOOTHILLS, THE CASCADE FOOTHILLS IN LANE COUNTY, THE NORTHERN CASCADES, THE CASCADES IN LANE COUNTY, AND THE UPPER HOOD RIVER VALLEY.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 39 in the Good category measuring Particulate Matter at Springfield City Hall. Data courtesy of Lane Regional Air Protection Agency (LRAPA)

Oakridge: The Air Quality Index is 23 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……….High (34)

Trees……….Low (12)

Last Counted: 7/11/14

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:

• Mostly cloudy with a slight (20%) chance of showers and thunderstorms this evening, a slight (20%) chance of showers late tonight,
• Mostly cloudy in the AM, partly cloudy Saturday afternoon and at night,
• A mix of clouds and sun with a slight (20%) chance of showers and thunderstorms Sunday AM, cloudy with a (30%) chance of showers and thunderstorms in the afternoon and evening, a slight (20%) chance of thunderstorms late Sunday night,
• A mix of clouds and sun Monday AM, mostly sunny and warmer in the afternoon, then mostly clear Monday night.
• lows 58-60 highs 93-88 warming back to near 93 Monday.
• Then mostly sunny Tuesday, Wednesday, Thursday and Friday, mostly clear each night.
• highs 95-88 lows 62-56. (seasonal averages high 82 low 51)

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Forecast for the Umpqua Basin including Roseburg:

• Mostly cloudy with a slight (20%) chance of isolated thunderstorms this evening, mostly cloudy tonight (under 0.10 in. of rain possible),
• AM clouds Saturday, sunny in the afternoon, partly cloudy in the evening, mostly clear late Saturday night,
• Mostly cloudy Sunday AM, partly cloudy with a slight (20%) chance of thunderstorms in the afternoon, partly cloudy in the evening, mostly clear at night,
• Mostly sunny Monday, then mostly clear Monday night.
• lows 60-63 highs 94-89 warning to near 98 Monday.
• Mostly sunny Tuesday through Thursday, mostly clear each night,
• Then sunny Friday.
• highs 100 cooling to near 90 Friday lows 64-58. (seasonal averages high 84 low 56)

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

• Mostly cloudy with a slight (20%) chance of thunderstorms this evening, patchy coastal fog late tonight,
• Mostly cloudy Saturday AM with patchy coastal fog, partly cloudy in the afternoon, partly cloudy Saturday night with patchy coastal fog late,
• Mostly cloudy with patchy AM coastal fog, partly cloudy Sunday afternoon, mostly cloudy with a slight (20%) chance of evening coastal thunderstorms, partly cloudy with a slight (20%) chance of coastal showers late at night while a slight (20%) chance of evening thunderstorms inland and a slight (20%) chance of showers late Sunday night,
• Partly cloudy Monday AM, sunny in the afternoon, then mostly clear at night.
• lows 55-58 highs 62-64 warming to 65 Sunday.
• Then mostly sunny Tuesday, Wednesday, and Thursday and mostly clear each night.
• highs 68-62 warming to 65 Friday lows near 58. (seasonal averages high 64 low 53).

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Forecast for the Cascades in Lane County:

• Mostly cloudy with a slight (20%) chance of showers and thunderstorms tonight (0.10 in. of rain possible, more in storms),
• Mostly cloudy Saturday AM, partly cloudy with a sight (20%) chance of showers and thunderstorms in the afternoon and evening, just partly cloudy late Saturday night,
• A mix of clouds and sun Sunday with a slight (20%) chance of AM showers and thunderstorms, cloudy a (40%) chance afternoon and evening showers and thunderstorms,  a good (50%) chance of showers and a slight (20%) chance of thunderstorms late Sunday night,
• Partly cloudy Monday, then mostly clear at night.
• snow level above 8,000 ft. tonight through Sunday night, free air freezing level 16,000 ft Monday and Monday night.
• lows 52-55 cooling to 52 Sunday night warming to 58 Monday night highs 83-80 warming to 85 Monday.
• Mostly sunny Tuesday, Wednesday, Thursday, and Friday, mostly clear each night,
• Then sunny Thursday.
• free air freezing level 16,000 ft. Tuesday through Friday.
• highs 86-75 lows 58-50.

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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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