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 Low Pressure Trough (Shaded “U”shape with blue arrows) currently off the California coast is still in control of our weather. The graphics for days days 1-3 show a weak frontal system approaching the Pacific Northwest Sunday. An Upper Level High Pressure Ridge (Shaded “Arch”shape with blue arrows) takes over for more warming Saturday and Sunday, then even hotter Monday through Thursday. The graphics for days 3-7 show a frontal system 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 21 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 16 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 20 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 MONDAY MORNING THROUGH 8 PM THURSDAY FOR CENTRAL DOUGAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, THE EASTERN DOUGLAS COUNTY FOOTHILLS, JACKSON COUNTY, THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES, AND THE SISKIYOU MOUNTAINS.
• 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:

• Sunny and a bit warmer today, Sunday, and Monday, clear each night,
• Sunny and a bit warmer (HOT) Monday, clear at night.
• highs 90-94 lows 54-52.
• Sunny and even Hotter Tuesday and Wednesday, clear both nights,
• Then sunny and a bit cooler but still hot Thursday and Friday, mostly clear Thursday night.
• highs 98-102 cooling to 92 Friday lows near 58. (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:

• Sunny and a bit warmer today, Sunday, and Monday, clear each night,
• highs 90-96 lows 57-62.
• Sunny and hotter Tuesday and Wednesday, clear each night,
• Sunny and a bit cooler but still hot Thursday, mostly clear Thursday night,
• Then mostly sunny and a bit cooler Friday.
• highs 102-105 cooling to 98 Friday lows 64-62. (seasonal averages high 86 low 57)

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

• Sunny and a bit cooler this afternoon, clear this evening and partly cloudy with patchy coastal fog late while clear inland tonight,
• Patchy AM coastal fog, sunny and a bit warmer Sunday afternoon, mostly clear Sunday night,
• Sunny and a bit warmer Monday, then mostly clear at night.
• highs 68-70 lows near 55.
• Mostly sunny and a bit warmer Tuesday and Wednesday, mostly clear both nights,
• Patchy AM fog, sunny and a bit cooler with patchy lingering fog Thursday afternoon, clear with patchy evening fog, partly cloudy late Thursday night,
• Then partly cloudy and a bit cooler Friday.
• 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:

• Sunny and a bit warmer today and Sunday, partly cloudy in the evening, clear late tonight, just clear Sunday night,
• Sunny Monday AM, partly cloudy in the afternoon, then clear Monday night.
• free air freezing level above 12,000 ft. today through Monday night.
• highs 78-84 lows 52-55.
• Sunny and a bit warmer Tuesday and Wednesday, clear both nights,
• Sunny Thursday AM, party cloudy and a bit cooler in the afternoon and Thursday night,
• Mostly sunny Friday AM, then partly cloudy and a bit cooler with a slight (20%) chance of showers and thunderstorms in the afternoon.
• free air freezing level above 12,000 ft. Tuesday through Thursday night, then snow level above 8,000 ft. Friday.
• highs 88-93 cooling to 83 Friday lows 60-55.

 

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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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