Here is my weekly weather quiz question for the last time. What is  “Staccato Lightning?” Here is the correct answer. Staccato Lightning is a Cloud to Ground (CG) lightning discharge which appears as a single very bright, short-duration stroke, often with considerable branching. I’ll have a new weekly weather quiz question for you starting Monday. 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 into Monday.  A frontal system (position shown is Wednesday) will be pushing through the Pacific Northwest Tuesday and Wednesday giving us at least a slight chance of showers starting Wednesday.

Note: In this high heat situation please remember to drink plenty of water, stay where it is cool if possible, use sunscreen and remember to have plenty of cool water for your outdoor pets.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 42in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 25 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 39 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 UNTIL 9 PM TONIGHT FOR  THE LOWER COLUMBIA, THE GREATER PORTLAND METRO AREA, THE CENTRAL WILLAMETTE VALLEY, THE SOUTH WILLAMETTE VALLEY, THE WESTERN COLUMBIA RIVER GORGE, THE CENTRAL COLUMBIA RIVER GORGE, AND THE UPPER HOOD RIVER VALLEY.
• A HEAT ADVISORY IS IN EFFECT  UNTIL 9 PM TONIGHT FOR THE NORTHERN OREGON CASCADE FOOTHILLS  AND THE CASCADE FOOTHILLS IN LANE COUNTY.
• A HEAT ADVISORY IS IN EFFECT UNTIL 11 PM TONIGHT FOR CENTRAL DOUGLAS COUNTY AND THE EASTERN DOUGLAS COUNTY FOOTHILLS.
• A HEAT ADVISORY IS IN EFFECT UNTIL 8 PM MONDAY FOR EASTERN CURRY COUNTY, JOSEPHINE COUNTY, JACKSON COUNTY,  THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES AND THE SISKIYOU MOUNTAINS.
• A FLASH FLOOD WATCH IS IN EFFECT UNTIL 11 PM TONIGHT FOR THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES, THE SISKIYOU MOUNTAINS AND THE KLAMATH BASIN.

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

• Mostly clear tonight,
• Mostly sunny and a bit cooler, but still very warm Monday, clear in the evening, partly cloudy late Monday night,
• A mix of clouds and sun and a bit cooler Tuesday and Wednesday, partly cloudy Tuesday evening and mostly cloudy at night, partly cloudy Wednesday evening, then mostly cloudy with a slight (20%) chance of showers late Wednesday night.
• lows 58-52 highs 88-73.
• A mix of clouds and sun and a bit cooler with a slight (20%) chance of showers Thursday, partly cloudy with a slight (20%) chance of evening showers, mostly cloudy with a (40%) chance of showers late Thursday night through Friday evening, a slight (20%) chance of showers late Friday night,
• A mix of clouds and sun with a slight (20%) chance of AM showers, a (30%) chance of showers and a bit warmer Saturday afternoon, mostly cloudy with a (40%) chance of evening showers, partly cloudy with a slight (20%) chance of showers late at night,
• Then a mix of clouds and sun and a bit warmer with a slight (20%) chance of showers Sunday .
• highs 69-63 warming to 68 Sunday lows 49-47. (seasonal averages high 71 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:

• Partly cloudy with a slight (20%) chance of thunderstorms this evening (heavy rain possible in storms), just partly cloudy late tonight,
• AM clouds, partly cloudy and a bit cooler with a slight (20%) chance of showers and thunderstorms Monday afternoon, partly cloudy Monday night,
• Partly cloudy with a slight (20%) chance of thunderstorms Tuesday and in the evening, a slight (20%) chance of showers late Tuesday night,
• Mostly cloudy and a bit cooler with a (30%) chance of showers Wednesday and Wednesday night.
• lows 60-52 highs 95-79.
• Mostly cloudy with a slight (20%) chance of showers Thursday AM, partly cloudy with a slight (20%) chance of showers in the afternoon and evening, mostly cloudy with a (30%) chance of showers at night and Friday AM, a (40%) chance of showers and a slight (20%) chance of thunderstorms in the afternoon and evening, a (40%) chance of showers late at night,
• Mostly cloudy with a (30%) chance of showers Saturday and Saturday night,
• Partly cloudy with a slight (20%) chance of showers Sunday AM, then mostly cloudy with a slight (20%) chance of showers Sunday afternoon.
• highs 72-68 warming to 72 Sunday lows 54-48. (seasonal averages high 74 low 50).

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

• Partly cloudy this evening, mostly cloudy with patchy coastal fog late tonight and Monday AM, mostly cloudy in the afternoon and Monday night,,
• Mostly cloudy with a slight (20%) chance of inland thunderstorms Tuesday AM, partly cloudy in the afternoon and evening, mostly cloudy with a slight (20%) chance of showers late Tuesday night,
• Then mostly cloudy with a (30%) chance of showers Wednesday and Wednesday night.
• lows 55-50 highs near 65.
• Mostly cloudy with a slight (20%) chance of showers Thursday AM, partly cloudy and a bit cooler with a slight (20%) chance of showers in the afternoon, mostly cloudy with a (30%) chance  of showers Thursday night and Friday AM, a (30%) chance of showers and a slight (20%) chance of thunderstorms in the afternoon and evening, a (30%) chance of showers late Friday night through Saturday night,
• Then mostly cloudy with a slight (20%) chance of showers Sunday.
• highs near 63 lows near 50. (seasonal averages high 61 low 50)

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Forecast for the Cascades in Lane County:

• Partly cloudy with a slight (20%) chance of showers and thunderstorms tonight through Monday evening, a slight (20%) chance of showers late at night,
• Partly cloudy with a slight (20%) chance of showers Tuesday AM, a slight (20%) chance of showers and thunderstorms and a bit cooler in the afternoon, mostly cloudy with a slight (20%) chance of showers and thunderstorms in the  evening, just partly cloudy late Tuesday night,
• A mix of clouds and sun and a bit cooler Wednesday with a slight (20%) chance of showers and thunderstorms in the afternoon, partly cloudy with a slight (20%) chance of showers late Wednesday night.
• snow level above 8,000 ft. today through Wednesday night.
• lows 54-42 highs 82-65.
• A mix of clouds and sun and a bit cooler with a slight (20%) chance of showers Thursday, partly cloudy with a slight (20%) chance of evening showers, mostly cloudy with a (30%) chance of showers late Thursday night,
• A mix of clouds and sun with a (40%) chance of showers and a bit cooler Friday, partly cloudy with a (40%) chance of showers in the evening, a (40%) chance of rain and snow showers late Friday night,
• A (30%) chance of AM rain and snow showers, a (30%) chance of showers and a bit cooler Saturday afternoon, partly cloudy with a (30%) chance of evening showers, just partly cloudy late Saturday night,
• Then a mix of clouds and sun and a bit warmer Sunday.
• snow level above 8,000 ft. Thursday, 7,500 ft. Thursday night, 6,500 ft. Friday, 5,500 ft. Friday night, 5,000 ft. Saturday, 6,500 ft. Saturday night, then free air freezing level 7,500 ft. Sunday.
• highs 62-49 warming to 55 Sunday lows 39-34 warming to 36 Saturday night.

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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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