Here is my weekly weather quiz question. What is a “Banner Cloud?” 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.

________________

 

An Upper Level Low Pressure Trough (Shaded “U” shape with blue arrows) is offshore while Upper level High pressure (Shaded “Arch” shape with blue arrows) is over the Rockies keeping our temperatures fairly stable. The graphics for days 1-3 show a weak cool front passing through Saturday. The graphics for days 3-7 show the frontal systems that move through Oregon Wednesday through next Friday.

________________

 

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 33 in the Good category measuring Ozone.

Oakridge: The Air Quality Index is 19 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 30 in the Good category measuring Ozone.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

 

__________________

Advisories:

•  A Health Advisory has been issued for Lake Billy Chinook, located 12 miles west of Madras in Jefferson County. Water monitoring has has confirmed the presence of Blue-green Algae and the toxins they produce. These toxin concentrations ca be harmful to humans and animals. 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. Drinking water directly from these areas of Lake Billy Chinook at this time is especially dangerous. Oregon public health officials advise campers and other recreational visitors that toxins cannot be removed by boiling, filtering or treating water with camping-style filters.
• 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.

________________

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

• Clear tonight,
• Sunny and a bit warmer Saturday, clear Saturday night,
• Mostly sunny and a bit cooler Sunday, partly cloudy at night,
• AM clouds with a slight (20%) chance of light rain or drizzle, partly cloudy and a bit cooler Monday afternoon and at night.
• lows 52-55 cooling back to 52 Monday night highs 84-78.
• Partly cloudy in the AM, mostly sunny and a bit warmer Tuesday afternoon, mostly clear Tuesday night,
• Partly cloudy in the AM, mostly sunny and a bit warmer Wednesday, mostly clear at night,
• Then sunny Thursday and Friday, clear Thursday night.
• highs 80-83 lows near 53. (seasonal averages high 81 low 51)

_____

Eugene-Springfield Pollen Count

Grass………. High (28)

Trees………. Low (3)

Last Counted: 7/7/17

Data Courtesy of Oregon Allergy Associates.

 

________________

 

Forecast for Roseburg:

• Mostly clear this evening, partly cloudy with patchy fog late tonight,
• Mostly cloudy with patchy AM fog and drizzle, sunny and a bit warmer Saturday afternoon, mostly clear Saturday night,
• AM clouds with patchy fog, sunny and a bit cooler Sunday afternoon, mostly clear in the evening, partly cloudy late at night,
• Mostly cloudy with patchy AM fog and drizzle, just mostly cloudy and a bit cooler Monday afternoon, then partly cloudy Monday night.
• lows 55-53 highs near 88-82.
• Partly cloudy and a bit warmer Tuesday, mostly clear at night,
• Then mostly sunny Wednesday, Thursday, and Friday, mostly clear each night,
• highs 86-88 lows 55-57. (seasonal averages high 83 low 56)

 

_____________________

 

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

• Mostly clear this evening, mostly cloudy with patchy coastal fog late tonight,
• Mostly cloudy with patchy fog and drizzle Saturday AM, sunny the afternoon, mostly clear in the evening, mostly cloudy with patchy coastal fog late Saturday night,
• AM clouds with patchy fog, sunny Sunday afternoon, mostly clear in the evening, mostly cloudy with patchy fog and drizzle late at night,
• Cloudy with patchy fog and drizzle Monday AM, partly cloudy and a bit cooler in the afternoon, then partly cloudy with patchy AM and late night fog Monday night through Friday.
• lows 55-52 highs near 63.
• highs near 64 lows near 54. (seasonal averages high 64 low 52)

 

________________

Forecast for the Cascades in Lane County:

• Clear tonight,
• Sunny and a bit warmer Saturday, clear at night,
• Sunny and a bit cooler Sunday, mostly clear Sunday night,
• AM clouds, mostly sunny and a bit  cooler Monday afternoon, then mostly clear at night.
• free air freezing level 15,000 ft. rising to 16,000 ft. late tonight, 16,000 ft. Saturday and Saturday night, 15,000 ft. Sunday, 15,000 ft. falling to 14,000 ft. Sunday night, then 14,000 ft. Monday and Monday night.
• lows 50-46 highs 78-70.
• Mostly sunny and a bit warmer Tuesday, mostly clear Tuesday night,
• Mostly sunny and a little bit cooler Wednesday and Thursday, clear Wednesday night, partly cloudy in the evening and clear late Thursday night,
• Then sunny Friday.
• free air freezing level 14,000 ft. rising to 15,000 ft. Tuesday, then 15,000 ft. Tuesday night through Friday.
• highs 74-77 lows 47-49.

________________

**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.

_______________