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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 (position shown is Friday) will move in by Thursday cooling our high temperatures. So far 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 will hold for the holiday weekend too, but we’ll have to wait and see.

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Advisories:

• A HEAT ADVISORY IS IN EFFECT UNTIL 9 PM TONIGHT FOR THE COAST RANGE OF NORTHWEST OREGON, THE CENTRAL COAST RANGE OF WESTERN OREGON, THE GREATER PORTLAND METRO AREA, THE GREATER VANCOUVER METRO AREA, THE CENTRAL WILLAMETTE VALLEY, THE SOUTH WILLAMETTE VALLEY, THE WESTERN COLUMBIA RIVER GORGE, THE CENTRAL COLUMBIA RIVER GORGE, THE NORTHERN OREGON CASCADE FOOTHILLS, AND THE CASCADE FOOTHILLS IN LANE COUNTY.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 40 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 16 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:

• Clear this evening, partly cloudy tonight,
• Mostly cloudy in the AM, partly cloudy and much cooler Wednesday afternoon and evening, mostly cloudy late Wednesday night,
• Cloudy Thursday AM, partly cloudy in the afternoon and at night,
• Partly cloudy Friday AM, mostly sunny in the afternoon (Independence Day), them partly cloudy at night.
• lows 57-48 warming to 52 Friday night highs near 78.
• 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 78 low 50)

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Forecast for the Umpqua Basin including Roseburg:

• Partly cloudy with a slight (20%) chance of isolated thunderstorms this evening, partly cloudy late at night,
• Partly cloudy Wednesday through Thursday, mostly clear Thursday night.
• Sunny Friday (Independence Day), then partly cloudy Friday night.
• lows 60-54 highs 84-82 warming to 86 Friday.
• Partly cloudy Saturday through Sunday night,
• Mostly sunny Monday, mostly clear at night,
• Then Sunny Tuesday.
• highs 84-82 warming to 86 Tuesday 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:

• Partly cloudy tonight,
• Mostly cloudy in the AM, partly cloudy and cooler Wednesday afternoon and Wednesday night,
• Partly cloudy Thursday, mostly clear at night.
• Partly cloudy Friday (Independence Day) and partly cloudy at night.
• lows 58-55 highs 64-55.
• 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 63 low 52).

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Forecast for the Cascades in Lane County:

• Partly cloudy with a slight (20%) chance of isolated showers and thunderstorms tonight,
• Partly cloudy and much cooler Wednesday with a slight (20%) chance of showers and thunderstorms, just partly cloudy and cooler at night,
• Partly 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. tonight, free air freezing level 15,000 ft. Wednesday through Friday night.
• lows 53-42 warming to 46 Friday night highs 75-70 warming to 73 Friday.
• 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, and 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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