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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A broad upper level High Pressure Ridge (Shaded “Arch” shape with blue arrows) will keep us in a hot easterly airflow through the weekend. Look for some high temperature records to be broken. A frontal system will be pushing through the Pacific Northwest Tuesday cooling us down and giving us at least a slight chance of showers starting Wednesday.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 29 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 9 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 34 in the Good category measuring Ozone.

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

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Advisories:

• AN EXCESSIVE HEAT WARNING IS IN EFFECT FROM 10 AM SATURDAY THROUGH 10 PM SUNDAY 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, THE NORTHERN OREGON CASCADE FOOTHILLS, THE CASCADE FOOTHILLS IN LANE COUNTY AND THE UPPER HOOD RIVER VALLEY.
• A HEAT ADVISORY IS IN EFFECT FROM 2 PM SATURDAY THROUGH 11 PM SUNDAY FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, JACKSON COUNTY,  THE SOUTHERN OREGON CASCADES AND THE SISKIYOU MOUNTAINS.

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

• Clear tonight,
• Sunny and excessively hot Saturday, mostly clear Saturday night,
• Mostly sunny and not quite as hot Sunday, partly cloudy Sunday night,
• A mix of clouds and sun Monday AM, mostly sunny and cooler in the afternoon, then partly cloudy and cooler Monday night.
• lows 56-60 cooling to 52 Monday night highs 98-84.
• Partly cloudy and cooler Tuesday and in the evening, mostly cloudy late at night,
• A mix of clouds and sun and a bit cooler with a slight (20%) chance of showers Wednesday afternoon, mostly cloudy with a slight (20%) chance of showers Wednesday night,
• A mix of clouds and sun and a bit cooler with a slight (20%) chance of showers Thursday and Friday, mostly cloudy with a slight (20%) chance of showers Thursday evening,
• highs 82-70 lows near 52. (seasonal averages high 70 low 46.)

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Eugene-Springfield Pollen Count:

Grass………. Very High (233)

Trees………. Moderate (51)

Last Counted: 6/3/16

Data Courtesy of Oregon Allergy Associates.

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Forecast for Roseburg:

• Clear tonight,
• Sunny and excessively hot Saturday, mostly clear in the evening, partly cloudy with a slight (20%) chance of thunderstorms late Saturday night through Sunday evening, just partly cloudy Sunday night,
• Partly cloudy and a bit cooler with a slight (20%) chance of thunderstorms and a bit cooler Monday and Monday night.
• lows 60-63 cooling to 55 Monday night highs 100-90.
• Then partly cloudy and a bit cooler with a slight (20%) chance of showers Tuesday through Friday.
• highs 87-72 lows 53-48. (seasonal averages high 73 low 50).

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

• Clear tonight,
• Sunny and a bit warmer Saturday, mostly clear in the evening, mostly cloudy with a slight (20%) chance of coastal thunderstorms Saturday night,
• Mostly cloudy at the shore while partly cloudy with a slight (20%) chance of inland thunderstorms Sunday and a bit cooler, partly cloudy in the evening, mostly cloudy with patchy coastal fog late Sunday night,
• Then partly cloudy and a bit warmer Monday and Monday night.
• lows 55-52 highs 68-65 warming back to 68 Monday.
• Partly cloudy Tuesday and in the evening, then mostly cloudy with a slight (20%) chance of showers late Tuesday night,
• Mostly cloudy with a slight (20%) chance of showers Wednesday AM, partly cloudy and a bit cooler with a slight (20%) chance of showers in the afternoon and evening, mostly cloudy with a slight (20%) chance of showers late Wednesday night and Thursday AM, partly cloudy and a bit cooler with a slight (20%) chance of showers Thursday afternoon, then partly cloudy with a (30%) chance  of showers Thursday night and Friday.
• highs 68-60 lows 52-50. (seasonal averages high 61 low 49)

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Forecast for the Cascades in Lane County:

• Clear tonight,
• Sunny and warmer Saturday, partly cloudy with a slight (20%) chance of showers and thunderstorms Saturday night through Monday night,
• free air freezing level 15,000 ft. tonight and Saturday, then snow level above 8,000 ft. Saturday night through Monday night.
• lows 52-57 cooling to 50 Monday night highs 86-78.
• A mix of clouds and sun and cooler with a slight (20%) chance of showers and thunderstorms and cooler Tuesday and in the evening, just partly cloudy late at night,
• A mix of clouds and sun and a bit cooler cooler with a slight (20%) chance of showers Wednesday afternoon, partly cloudy with a slight (20%) chance of evening showers, mostly cloudy with a slight (20%) chance of showers late Wednesday night,
• Then a mix of clouds and sun and a bit cooler with a slight (20%) chance of showers Thursday and Friday, partly cloudy with a slight (20%) chance of showers Thursday night.
• snow level above 8,000 ft. Tuesday through Wednesday night, 7,000 ft. Thursday and Thursday night, then 8,000 ft. Friday.
• highs 73-57 lows 44-38.

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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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