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Check out my latest Eugene Daily News Weather Or Not Column A Big Badda-Boom!

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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 weekly weather quiz question. What is “radiational cooling?” 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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Now an upper level high pressure ridge (Shaded “Arch” shape with blue arrows) will weaken allowing some onshore airflow which will cool us rapidly back to normal. Upper level low pressure (Shaded “U” shape on previous graphic) will bring more onshore airflow to begin the cooling trend. A cold front is moving through today cooling our high temperatures. It looks like the 4th of July will be a nice dry day with temperatures that are cooler, but just about normal. With luck it should hold for the holiday weekend too, but we’ll have to wait and see.

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Advisories: None at this time.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 23 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 18 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……….Very High (203)

Trees……….Moderate (22)

Last Counted: 7/1/14

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 and much cooler today, partly cloudy this evening, mostly cloudy late tonight,
• Mostly cloudy Thursday AM, mostly sunny in the afternoon, partly cloudy at night,
• Partly cloudy Friday AM, mostly sunny in the afternoon (Independence Day), then partly cloudy at night.
• highs 80-76 warming back to near 80 Friday lows 52-50 warming back to 52 Friday night.
• A mix of clouds and sun Saturday, partly cloudy Saturday night through Monday AM,  mostly sunny Monday afternoon, mostly clear at night,
• Partly cloudy Tuesday AM, then mostly sunny in the afternoon.
• highs near 80 lows 53-56. (seasonal averages high 79 low 50)

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Forecast for the Umpqua Basin including Roseburg:

• Mostly cloudy with a slight (20%) chance of showers and isolated thunderstorms this AM, sunny this afternoon, partly cloudy this evening, mostly cloudy late tonight and Thursday AM, sunny in the afternoon, mostly clear Thursday night,
• Sunny Friday AM, partly cloudy in the afternoon (Independence Day), then partly cloudy Friday night.
• highs 84-82 warming to 86 Friday lows 58-54.
• Partly cloudy Saturday through Sunday night,
• Mostly sunny Monday, mostly clear at night,
• Then Sunny Tuesday.
• highs 87-82 lows 56-60. (seasonal averages high 81 low 55)

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

• Mostly cloudy this AM, partly cloudy and cooler this afternoon and evening, mostly cloudy tonight,
• Mostly cloudy Thursday AM, mostly sunny in the afternoon, mostly cloudy in the evening, partly cloudy at night.
• Partly cloudy Friday (Independence Day) and partly cloudy at night.
• highs 64-62 lows 57-55.
• Mostly cloudy Saturday and Saturday night,
• Partly cloudy Sunday, just mostly cloudy Sunday night through Tuesday AM, then sunny Tuesday afternoon.
• highs 65-68 cooling to near 60 Tuesday lows near 56. (seasonal averages high 64 low 52).

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Forecast for the Cascades in Lane County:

• A mix of clouds and sun and much cooler today with a slight (20%) chance of showers and thunderstorms, partly cloudy with a slight (20%) chance of showers and thunderstorms this evening, just partly cloudy and cooler tonight,
• Mostly cloudy in the AM, mostly sunny Thursday afternoon, mostly clear at night,
• Mostly sunny Friday (Independence Day), then partly cloudy Friday night.
• snow level above 8,000 ft. today, free air freezing level 14,000 ft. late tonight, 15,000 ft. Thursday through Friday night.
• highs 73-75 lows 44-46.
• Partly cloudy Saturday through Monday AM, mostly sunny Monday afternoon, mostly clear at night,
• Then mostly sunny Tuesday.
• free air freezing level 15,000 ft. Saturday through Sunday, 14,000 ft. Sunday night, 15,000 ft. Monday, then 16,000 ft. Monday night and Tuesday.
• highs 72-76 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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