Here is my weekly weather quiz question. What is  “Staccato Lightning?” 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 high (Shaded “Arch” shape with blue arrows) weakens and allows a weak disturbance to bring clouds and cool us a bit. There’s only a slight chance of showers today as a frontal system slid into Oregon. High pressure takes over again into the weekend into next week. A frontal system will be pushing through the Pacific Northwest Tuesday.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 18 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 17 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 15 in the Good category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA).

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Advisories:

• AN EXCESSIVE HEAT WATCH IS IN EFFECT FROM SATURDAY AM THROUGH SUNDAY EVENING FOR  THE COAST RANGE OF NORTHWEST OREGON, THE CENTRAL COAST RANGE OF WESTERN OEGON, THE GREATER PORTLAND METRO AREA, THE CENTRAL WILLAMETTE VALLEY, THE SOUTH WILLAMETTE VALLEY, THE WESTERN COLUMBIA RIVER GORGE, AND THE CENTRAL COLUMBIA RIVER GORGE.

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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• Mostly cloudy with some sun breaks and a good (50%) chance of showers then tapering off and cooler this afternoon, just mostly cloudy tonight,
• Mostly sunny and warmer Friday and Saturday, clear at night,
• Mostly sunny and hot Saturday, then mostly clear Saturday night.
• highs 75-96 lows 52-62.
• Mostly sunny and hot Sunday, partly cloudy and a bit cooler Sunday night through Tuesday evening, mostly cloudy late at night,
• Then partly cloudy Wednesday.
• highs 95-72 lows 56-50. (seasonal averages high 70 low 46.)

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Eugene-Springfield Pollen Count:

Grass………. Very High (246)

Trees………. Moderate (51)

Last Counted: 6/2/16

Data Courtesy of Oregon Allergy Associates.

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Forecast for Roseburg:

• Mostly cloudy with some sun breaks and a bit cooler this afternoon, mostly cloudy this evening, partly cloudy late tonight,
• Sunny and a bit warmer Friday and Saturday, clear at night.
• highs 83-97 lows 56-62.
• Sunny in the AM, partly cloudy and cooler with a slight (20%) chance of thunderstorms Sunday afternoon and evening, just partly cloudy Sunday night and Monday, partly cloudy with a slight (20%) chance of showers Monday night and Tuesday, partly cloudy with a slight (20%) chance of showers late Tuesday night and Wednesday AM, then partly cloudy with a slight (20%) chance of thunderstorms Wednesday afternoon.
• highs 93-76 lows 59-52. (seasonal averages high 73 low 50).

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Forecast for The South Oregon Coast Including Coos Bay and North Bend:

• Mostly cloudy this afternoon and evening, partly cloudy late tonight,
• Sunny and a bit warmer Friday and Saturday, clear Friday night, mostly clear Saturday night,.
• highs 66-70 cooling back to 66 Saturday lows 54-57.
• Partly cloudy and a bit cooler Sunday through Monday night,
• Mostly cloudy Tuesday AM, partly cloudy in the afternoon, then partly cloudy with a slight (20%) chance of showers Tuesday night and Wednesday.
• highs 67-62 lows 54-52. (seasonal averages high 60 low 49)

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Forecast for the Cascades in Lane County:

• Mostly cloudy with a slight (20%) chance of showers then tapering off and a bit cooler this afternoon, mostly cloudy this evening, partly cloudy late tonight,
• Then mostly sunny and a bit warmer Friday, clear at night,
• Sunny and warmer Saturday, mostly clear at nights,
• snow level above 8,000 ft. today, free air freezing level 13,000 ft. tonight, 14,000 ft.  Friday, then 15,000 ft. Friday night through Saturday night.
• highs 67-86 lows 42-57.
• Mostly sunny in the AM, partly cloudy and a bit warmer with a slight (20%) chance of showers and thunderstorms Sunday afternoon and evening, partly cloudy late Sunday night,
• A mix of clouds and sun and a bit cooler with a slight (20%) chance of showers and thunderstorms Monday afternoon and evening, a slight (20%) chance of showers late Monday night,
• Partly cloudy with a slight (20%) chance of showers Tuesday AM, a bit cooler with a slight (20%) chance of showers and thunderstorms Tuesday afternoon and evening, a slight (20%) chance of showers late at night and Wednesday AM, then partly cloudy with a slight (20%) chance of showers and thunderstorms Wednesday afternoon.
• snow level above 8,000 ft. Sunday through Wednesday.
• highs 85-60 lows 55-42.

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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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