Here is my weekly weather quiz question for the last time. What is an “Anemometer?” Here is the correct answer. An Anemometer is an instrument used for measuring the speed of the wind.  I’ll have a new weekly weather quiz question for you starting Monday. The first person to post the correct answer as a comment on this page 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) is taking over giving us easterly offshore airflow which will heat us up to record high temperatures. The graphics for days days 1-3 show a weak frontal system approaching the Pacific Northwest Sunday, but it should have no effect on our weather. The graphics for days 3-7 show frontal systems approaching late in the week. That’s when the cooling starts.

Note: Prepare yourself for much hotter weather through Thursday. Take proper precautions to keep hydrated and cool.

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Air Quality Index:

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

Oakridge: The Air Quality Index is 18 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 42 in the Good category measuring Ozone.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

 

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Advisories:

• AN EXCESSIVE HEAT WATCH IS IN EFFECT FROM TUESDAY AFTERNOON THROUGH  FRIDAY EVENING FOR THE COAST RANGE OF NORTHWEST OREGON, THE CENTRAL COAST RANGE OF OF WESTERN OREGON, THE LOWER COLUMBIA, THE GREATER PORTLAND METRO AREA, THE CENTRAL WILLAMETTE VALLEY, THE SOUTH WILLAMETTE VALLEY, THE WESTERN COLUMBIA GORGE, THE CENTRAL COLUMBIA RIVER GORGE, THE NORTHERN OREGON CASCADE FOOTHILLS, THE CASCADE FOOTHILLS IN LANE COUNTY, THE NORTHERN OREGON CASCADES, THE CASCADES IN LANE COUNTY, AND THE UPPER HOOD RIVER VALLEY.
• AN EXCESSIVE HEAT WATCH IS IN EFFECT FROM MONDAY MORNING THROUGH THURSDAY EVENING FOR THE SOUTH CENTRAL OREGON COAST, CENTRAL DOUGAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, THE EASTERN DOUGLAS COUNTY FOOTHILLS, JACKSON COUNTY, THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES, THE SISKIYOU MOUNTAINS, THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN LAKE COUNTY.
• The Oregon Health Authority issued a Health Advisory for Coffenbury Lake, located at Fort Stevens State Park about five miles northwest of US-101 ALT, Northwest Ridgefield Road near Warrenton in Clatsop County. Water monitoring has confirmed the presence of blue-green algae that can produce toxins in Coffenbury Lake. These blue-green algae levels are likely to be associated with dangerous cyanotoxin concentrations in the water that can be harmful to humans and animals.  People should always avoid areas with visible scum that looks foamy, scummy, thick like paint, pea-green, blue-green or brownish-red. Swimming and high-speed water activities such as water skiing or power boating where ingestion and inhalation exposure can occur are discouraged. Swallowing or inhaling water droplets as a result of these water activities in areas where a bloom has been identified or an advisory issued, can expose people to the toxins that can be produced. Although toxins are not absorbed through the skin, people with skin sensitivities who come into contact with a bloom may experience a puffy, red rash at the affected area. Drinking water directly from Coffenbury Lake at this time is especially dangerous. OHA Public Health Division officials advise campers and other recreational visitors that toxins cannot be removed by boiling, filtering or treating water with camping-style filters.
• A Health Advisory remains in effect for Odel Lake, located 75 miles southeast of Eugene off highway 58  in the northwest corner of Klamath County. Water monitoring has confirmed that the level of blue-green algae toxins are below guideline values for human exposure. 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 sessitivities may experience a puffy, red rash at the affected area.
• The Oregon Health Authority has updated the Health Advisory issued June 30 for Lake Billy Chinook, located about 12 miles west of Madras in Jefferson County. The update lifts the advisory on those areas of the Deschutes and Crooked River of Lake Billy Chinook arms affected by the advisory, and confines the advisory on the Metolius Arm to Perry South Cove. Water monitoring has confirmed that the level of blue-green algae toxins are below guideline values for human exposure. However, OHA recommends that people remain cautious when using the lake, particularly with pets because toxins are still well above the very low exposure levels established for dogs.
• A Permanent Health Advisory remains in effect for the South Umpqua River and Lawson Bar. Pools in the bedrock along the rivers edge are known to develop Blue-green Algae (cyanobacterial) blooms that can be harmful to pets and people if accidental ingestion occurs. Signs have been posted along several access areas along the river.

 

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

• Clear tonight,
• Sunny and a bit warmer Saturday, clear at night,
• Sunny and HOT Monday, clear at night,
• Sunny and even Hotter Tuesday, clear Tuesday night.
• lows 55-53 warming to 58 Tuesday night highs 90-99.
• Sunny and even Hotter with record breaking possible Wednesday and Thursday, clear Wednesday night, mostly clear Thursday night,
• Mostly sunny, slightly cooler but still Very Hot Friday, partly cloudy Friday night and Saturday AM, then mostly sunny and cooler Saturday afternoon.
• highs 105-88 lows 62-59. (seasonal averages high 84 low 52)

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Eugene-Springfield Pollen Count
Grass………. Moderate (18)
Trees………. Low (2)
Last Counted: 7/27/17
Data Courtesy of Oregon Allergy Associates.
Note: It would seem the pollen season just about over.

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Forecast for Roseburg:

• Clear tonight,
• Sunny and a bit warmer Sunday, Monday and Tuesday, clear each night,
• lows 59-64 highs 95-102.
• Sunny and hotter Tuesday, mostly clear at night,
• Sunny and very Hot with possible record breaking temperatures Wednesday and  Thursday, mostly clear Thursday night,
• Then partly cloudy and a bit cooler Friday through Saturday.
• highs 107-94 lows 67-62. (seasonal averages high 86 low 57)

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

• Clear this evening, partly cloudy late tonight,
• Patchy AM coastal fog, sunny and a bit warmer Sunday afternoon, mostly clear at night,
• Sunny and a bit warmer Monday, mostly clear at night with patchy coastal fog late at night and Tuesday AM, sunny and a bit warmer in the afternoon then mostly clear Tuesday night.
• lows near 55 highs 68-70.
• Mostly sunny and a bit warmer Wednesday, mostly clear at night,
• Patchy AM fog, sunny and a bit cooler with patchy lingering fog Thursday afternoon, clear with patchy evening fog, then partly cloudy and a bit cooler late Thursday night through Saturday,
• highs 72-65 lows 55-57 cooling back to 55 Friday. (seasonal averages high 65 low 53)

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Forecast for the Cascades in Lane County:

• Clear tonight,
• Sunny and a bit warmer Sunday, clear at night,
• Mostly sunny Monday, clear Monday night,
• Sunny and a bit warmer Tuesday, clear at night.
• free air freezing level above 12,000 ft. tonight through Tuesday night.
• lows 52-58 highs 79-89.
• Mostly sunny and a bit warmer Wednesday, mostly clear at night,
• Mostly sunny Thursday AM, party cloudy in the afternoon and Thursday night,
• Mostly sunny Friday AM, partly cloudy and a bit cooler with a slight (20%) chance of showers and thunderstorms in the afternoon and evening, just partly cloudy at night,
• Mostly sunny in the AM, then partly cloudy and a bit cooler with a slight (20%) chance of showers and thunderstorms Saturday afternoon.
• free air freezing level above 12,000 ft. Wednesday through Friday AM, snow level above 8,000 ft. Friday afternoon and evening, free air freezing level 12,000 ft. late Friday night and Saturday AM, then snow level above 8,000 ft. Saturday afternoon.
• highs 92-80 lows 62-58.

 

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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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