Here is my weekly weather quiz question. What is a “Theodolite?” 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. Good luck.

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An upper level high pressure ridge (Shaded “Arch” Shape with blue arrows) has taken over and will seriously warm us up for the rest of the week into Saturday.  Look for record high temperatures particularly in Eugene and Roseburg. Upper level low pressure starts to take over early next week and a cold front will move through the Pacific Northwest next Monday and that should cool us down a bit.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 30 in the Good category measuring Ozone.

Oakridge: The Air Quality Index is 14 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 33 in the Good category measuring Ozone.

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

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Advisories:

• A RED FLAG WARNING IS IN EFFECT FROM 1 PM UNTIL 8 PM TODAY FOR THE ENTIRE WILLAMETTE VALLEY.
• A RED FLAG WARNING IS IN EFFECT FROM MIDNIGHT TONIGHT UNTIL 8 PM SATURDAY FOR WIND, LOW RELATIVE HUMIDITY AND INCREASINGLY UNSTABLE CONDITIONS FOR NORTH OREGON COAST RANGE, THE EAST SLOPES OF OF THE OF THE CENTRAL OREGON COAST RANGE, THE NORTH OREGON CASCADE FOOTHILLS, THE CENTRAL OREGON CASCADE FOOTHILLS, THE MT. HOOD NATIONAL FOREST, WEST OF CASCADE CREST AND THE WILLAMETTE NATIONAL FOREST.
• AN EXCESSIVE HEAT WARNING IS IN EFFECT FROM 2 PM TODAY THROUGH 9 PM SATURDAY FOR THE COAST RANGE OF NORTHWEST OREGON, THE CENTRAL COAST RANCE OF WESTERN OREGON, THE GREATER PORTLAND METRO AREA, THE CENTRAL WILLAMETTE VALLEY, THE SOUTH WILLAMETTE VALLEY,  THE WESTERN COLUMBIA RIVER GORGE, THE NORTH OREGON CASCADE FOOTHILLS, THE CASCADE FOOTHILLS IN LANE COUNTY, AND THE CASCADES IN LANE COUNTY BELOW 3,000 FT.
• A HEAT ADVISORY IS IN EFFECT FROM NOON UNTIL 9 PM FRIDAY FOR THE NORTH OREGON COAST , THE CENTRAL OREGON COAST,  THE CENTRAL COLUMBIA RIVER GORGE AND THE UPPER HOOD RIVER VALLEY.
• A HEAT ADVISORY IS IN EFFECT UNTIL 2 AM SUNDAY FOR  CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, THE EASTERN DOUGLAS COUNTY FOOTHILLS, AND JACKSON  COUNTY.
• A Blue-Green Algae health advisory remains in effect for Howard Bay (sometimes called Howards Bay or Howard’s Bay) in Upper Klamath Lake ONLY. People should avoid swallowing water while swimming or inhaling water droplets as a result of high-speed water activities, such as water skiing or power boating, in areas where blooms are identified. Although toxins are not absorbed through the skin, people who have skin sensitivities may experience a puffy, red rash at the affected area.

 

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

• Sunny and Hot today, probably a record high since 98 is the old record, clear tonight,
• Sunny and Very Hot Friday (another record high), clear at  night,
• Then sunny and Hot Saturday, clear Saturday night.
• highs 99-103 cooling (?) to 101 Saturday lows 57-59 cooling back to 57 Saturday night.
• Sunny and a bit cooler Sunday, Monday and Tuesday, clear each night,
• Then sunny and a bit warmer Wednesday.
• highs 86-82 warming to 85 Wednesday lows 53-50 warming back to 53 Tuesday night. (seasonal averages high 83 low 51)

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Eugene-Springfield Pollen Count:

Grass………. Low (3)

Trees………. Low (0)

Last Counted: 8/11/16

Data Courtesy of Oregon Allergy Associates.

The Grass and Tree Pollen season is officially over now.

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Forecast for Roseburg:

• Sunny and Very HOT today (102 is the record for today), Friday and Saturday, clear each night,
• highs 102-108 cooling (?) to 103 Saturday lows 65-59.
• Sunny and a bit cooler Sunday, Monday and Tuesday, clear each night.
• highs 95-86 lows 56-53 warming back to 56 Tuesday. (seasonal averages high 85 low 55)

 

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

• Patchy AM coastal fog and clouds and mostly sunny and a bit warmer this afternoon while sunny inland, mostly clear tonight,
• Patchy AM fog, sunny and very warm Friday, mostly cloudy with patchy coastal fog late Friday night while mostly clear inland,
• Patchy AM fog, sunny and much cooler Saturday, then partly cloudy at night.
• highs 70-82 cooling to 68 Saturday lows 57-54 Thursday night and Friday night.
• Partly cloudy and a bit cooler Sunday and Sunday night,
• Mostly cloudy Monday AM, sunny in the afternoon and Tuesday, mostly clear both nights,
• Then mostly sunny and a bit warmer Wednesday.
• highs 65-63 warming to 65 Wednesday lows 54-52. (seasonal averages high 66 low 53)

 

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Forecast for the Cascades in Lane County:

• Sunny and warmer today, (Hot) Friday and Saturday, clear each night,
• free air freezing level 15,000 ft. today, 16,000 ft. tonight through Saturday, then 15,000 ft. Saturday night.
• highs 86-88 lows near 52.
• Sunny and a bit cooler Sunday, Monday, Tuesday and Wednesday, clear each night.
• free air freezing level 14,000 ft. Sunday and Sunday night, 13,000 ft. Monday through Tuesday, 14,000 ft. Tuesday night, then 13,000 ft. Wednesday.
• highs 82-75 lows 49-47.

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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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