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.

________________

 

An upper level high pressure ridge (Shaded “Arch” Shape with blue arrows) has taken over and is seriously warming us for one more day Saturday. We still could see record high temperatures  in Eugene and Roseburg Saturday. Upper level low pressure (Shaded “U” shape with blue arrows) 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, but not for very long as high pressure takes over again by midweek. Note: Record highs were set today in Eugene at 104 degrees and 107 degrees in Roseburg.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 87 in the Moderate category measuring Ozone.

Oakridge: The Air Quality Index is 27 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 87 in the Moderate  category measuring Ozone.

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

________________

 

Advisories:

• A RED FLAG WARNING IS IN EFFECT THROUGH MIDNIGHT TONIGHT FOR WIND AND LOW RELATIVE HUMIDITY FOR THE NORTH OREGON COAST AND THE CENTRAL OREGON COASTAL STRIP.
• A RED FLAG WARNING IS IN EFFECT THROUGH 8 PM SATURDAY EVENING 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.
• A RED FLAG WARNING IS IN EFFECT FROM  NOON UNTIL 9 PM SATURDAY FOR  STRONG GUSTY WINDS WITH LOW RELATIVE HUMIDITY AND HIGH FIRE DANGER FOR THE SOUTH CENTRAL OREGON DESERT INCLUDING THE BLM LAND IN EASTERN LAKE COUNTY AND WESTERN LAKE COUNTY.
• AN EXCESSIVE HEAT WARNING IS IN EFFECT  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 FIRE WEATHER WATCH IS IN EFFECT FROM SUNDAY AFTERNOON THROUGH SUNDAY EVENING FOR STRONG WINDS AND LOW RELATIVE HUMIDITY AND HIGH FIRE DANGER FOR THE KLAMATH BASIN AND THE FREMONT-WINEMA NATIONAL FOREST.
• A FIRE WEATHER WATCH IS IN EFFECT FROM SUNDAY AFTERNOON THROUGH THROUGH MONDAY EVENING FOR STRONG GUSTY WINDS AND AND LOW RELATIVE HUMIDITY FOR THE EAST SLOPES OF THE NORTHERN OREGON CASCADES AND THE LOWER COLUMBIA BASIN OF OREGON.
• A HEAT ADVISORY IS IN EFFECT UNTIL 9 PM THIS EVENING 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 health advisory has been issued for the Ross Island Lagoon and the mouth of the lagoon as it connects to the Holgate Channel. Ross Island Lagoon is located about one river mile south of downtown Portland in Multnomah County. The advisory is being issued due to visual confirmation of a blue-green algae bloom in the lagoon. Oregon Public Health officials advise people to avoid swallowing or inhaling water droplets as a result of swimming or high-speed water activities, such as water skiing and power boating in areas where blooms are identified.
• A health advisory has been issued for Agency Lake. Agency Lake is located just north of Upper Klamath Lake near Klamath Falls along Highway 97 in Klamath County. Water monitoring on the lake has confirmed the presence of high levels of blue-green algae and associated toxins that can be harmful to people and animals. Swallowing water while swimming or inhaling water droplets as a result of high-speed water activities, such as water skiing and power boating, should be avoided in areas where blooms are identified. Although toxins are not absorbed through the skin, contact with cells from a bloom can cause skin irritation and a red, puffy rash in individuals with skin sensitivities, or those who develop rashes easily.
• 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.

 

________________

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

• Clear tonight,
• Sunny and Hot but a bit cooler Saturday, clear Saturday night,
• Sunny and cooler but still warm Sunday, clear at night,
• Mostly sunny and a bit cooler Monday, then clear Monday night.
• lows 60-52 highs 100-84.
• Sunny and a bit warmer Tuesday, mostly clear Tuesday night,
• Mostly sunny and a bit warmer Wednesday, clear at night,
• Then sunny and a bit warmer Thursday and Friday, clear Thursday night.
• highs 87-94 lows 54-58. (seasonal averages high 82 low 51)

_____

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.

___________________

Forecast for Roseburg:

• Clear tonight,
• Sunny and still very HOT Saturday, clear at night,
• Sunny and a little bit cooler Sunday, mostly clear Sunday night,
• Then sunny and a bit cooler Monday and clear at night.
• lows 66-55 highs 104-87.
• Then sunny and a bit warmer Tuesday through Friday, clear each night.
• highs 92-95 lows 55-59. (seasonal averages high 84 low 55)

 

________________

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

• Clear at the shore this evening and mostly cloudy with patchy coastal fog late while clear inland tonight,
• Mostly cloudy with patchy AM coastal fog while sunny and cooler inland Saturday, partly cloudy in the evening at the shore and mostly cloudy late while mostly clear inland Saturday night,
• Mostly cloudy at the shore while sunny and a bit cooler inland Sunday afternoon, mostly clear in the evening, mostly cloudy late Sunday night,
• Then partly cloudy and a bit cooler Monday and Monday night.
• lows near 53 highs 67-64.
• AM clouds, sunny and a bit warmer Tuesday afternoon, clear at night,
• Then sunny and a bit warmer Wednesday, Thursday and Friday, clear each night.
• highs 65-72 lows near 54. (seasonal averages high 66 low 53)

 

________________

 

Forecast for the Cascades in Lane County:

• Clear tonight,
• Sunny and still Hot Saturday, clear at night,
• Sunny and a bit cooler Sunday and Monday, mostly clear Sunday night, then clear Monday night.
• free air freezing level 16,000 ft. tonight through Saturday night, 15,000 ft. Sunday, then 14,000 ft. Sunday night through Monday night.
• lows 59-44 highs 87-76.
• Sunny and a bit warmer Tuesday, clear at night,
• Mostly sunny and a bit warmer Wednesday, clear Wednesday night,
• Then sunny Thursday and Friday, clear Thursday night.
• free air freezing level 14,000 ft. Tuesday through Wednesday, 15,000 ft. Wednesday night, then 14,000 ft. Thursday and Friday.
• highs 77-82 lows 45-56.

________________

**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.

________________

Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

_______________