Check out my latest Eugene Daily News Weather Or Not column:
http://eugenedailynews.com/2018/07/an-active-volcano-under-an-ice-sheet/
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Here is my weekly weather quiz question for the last time. What is a “Fire Wind?” Here is the correct answer. A Fire Wind is a thermally (heat) driven wind blowing radially inward toward a fire, produced by horizontal temperature differences between the heated air above the fire and the surrounding cooler free atmosphere. 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 arrows) slides eastward to our northeast. Surface and upper level high pressure take over for while. The graphics for Days 3-7 show a frontal system moving down from the northwest Tuesday, and still another frontal system coming in Thursday.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 30 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 27 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 23 in the Good category measuring Particulate Matter.
Data courtesy of Lane Regional Air Protection Agency (LRAPA)
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ADVISORIES:
- A HEAT ADVISORY IS IN EFFECT FROM 10 AM TODAY UNTIL 8 PM MONDAY FOR THE GREATER PORTLAND METRO AREA, THE CENTRAL WILLAMETTE VALLEY, THE WESTERN COLUMBIA RIVER GORGE, AND THE CENTRAL COLUMBIA RIVER GORGE.
- A HEAT ADVISORY IS IN EFFECT FROM 10 AM UNTIL 9 PM TODAY FOR THE SOUTH WILLAMETTE VALLEY.
- A FIRE WEATHER WATCH IS IN EFFECT FROM THIS AFTERNOON UNTIL THIS EVENING FOR ABUNDANT LIGHTNING ON DRY FUELS AND GUSTY OUTFLOW WINDS FOR THE DESCHUTES NATIONAL FOREST, THE MINUS SISTERS RANGER DISTRICT, THE CENTRAL MOUNTAINS OF OREGON, AND THE SOUTHERN BLUE AND STRAWBERRY MOUNTAINS.
- A RED FLAG WARNING IS IN EFFECT FROM 11 AM UNTIL 11 PM TODAY FOR ABUNDANT LIGHTNING ON DRY FUELS FOR THE SOUTHERN OREGON CASCADES, THE SISKIYOU MOUNTAINS, WESTERN KLAMATH NATIONAL FOREST, THE KLAMATH BASIN, THE FREMONT-WINEMA NATIONAL FOREST, THE SOUTH CENTRAL OREGON DESERT INCLUDING THE BLM LAND IN EASTERN LAKE AND WESTERN HARNEY COUNTY.
- A HEAT ADVISORY IS IN EFFECT THROUGH 11 PM MONDAY FOR CENTRAL DOUGLAS COUNTY.
- AN EXCESSIVE HEAT WARNING IS IN EFFECT THROUGH 11 PM TUESDAY FOR EASTERN CURRY COUNTY, JOSEPHINE COUNTY, AND JACKSON COUNTY.
- A HEAT ADVISORY IS IN EFFECT THROUGH 11 PM TUESDAY FOR EASTERN CURRY COUNTY, JOSEPHINE COUNTY, AND JACKSON COUNTY.
HEALTH ADVISORIES:
- A RECREATIONAL HEALTH ADVISORY IS IN EFFECT FOR ALL OF LAKE BILLY CHINOOK. THE LAKE IS LOCATED ABOUT 12 MILES WEST OF MADRAS, OREGON. WATER MONITORING HAS CONFIRMED THE PRESENCE OF CYANOBACTERIA AND THE TOXINS THEY PRODUCE IN THE METOLIUS, DDSCHUTES, AND CROCKED RIVER ARMS OF LAKE BILLY CHINOOK. THE CYNOTOXIN CONCENTRATIONS FOUND CAN BE HARMFUL TO HUMANS AND ANIMALS. PEOPLE SHOULD AVOID SWIMMING AND HIGH-SPEED WATER ACTIVITIES LIKE WATER SKIING OR POWER BOATING IN AREAS OF THE LAKE WHERE CYNOTOXINS 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 THE LAKE IS ESPECIALLY DANGEROUS TOXINS CANNOT BE REMOVED BY ANY TECHNIQUE.
- A PERMANENT HEALTH ADVISORY REMAINS IN EFFECT FOR THE SOUTH UMPQUA RIVER 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 hot today, clear tonight,
- Sunny and a bit cooler but still hot Monday, clear at night,
- Sunny and a bit cooler Tuesday, mostly clear Tuesday night.
- highs 98-89 lows 58-53.
- Mostly sunny and a bit cooler Wednesday and Thursday, mostly clear both nights,
- Mostly sunny Wednesday Friday and Saturday, mostly clear Friday night.
- Then mostly sunny Saturday.
- highs 86-84 lows near 52. (seasonal averages high 83 low 52)
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Eugene-Springfield Pollen Count
Grass………. Moderate (6)
Trees………. Low (6)
Last Counted: 7/6/18
Data Courtesy of Oregon Allergy Associates
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Forecast for Roseburg:
- Sunny and a bit hotter today, mostly clear tonight,
- Sunny and hot but a bit cooler Monday, clear Monday night,
- Sunny and slightly cooler Tuesday, mostly clear late at night.
- highs 99-96 lows 62-59.
- Mostly sunny but just a bit cooler Wednesday and Thursday, mostly clear both nights,
- Mostly sunny and a bit cooler Friday and Saturday, mostly clear Friday night.
- highs 93-86 lows 57-55. (seasonal averages high 85 low 56)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Partly cloudy this AM, mostly sunny this afternoon, mostly clear this evening, partly cloudy late tonight,
- Partly cloudy in the AM, sunny Monday afternoon, mostly clear Monday night,
- Some AM clouds, sunny Tuesday afternoon, then partly cloudy Tuesday night.
- highs near 68 lows near 55.
- Partly cloudy and slightly warmer Wednesday, partly cloudy at night,
- Mostly sunny and a bit cooler Thursday, mostly clear Thursday night,
- Mostly sunny and a bit warmer Friday, mostly clear at night,
- Then sunny but a bit cooler Saturday.
- highs 68-66 warming to 69 Friday cooling back to 66 Saturday lows near 54. (seasonal averages high 65 low 53)
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Forecast for the Cascades in Lane County:
- AM sun, partly cloudy and a bit warmer with a slight (20%) chance of showers and thunderstorms this afternoon and evening, just partly cloudy late tonight,
- Mostly sunny Monday, partly cloudy in the evening, clear late Monday night,
- Sunny and a bit cooler Tuesday, then mostly clear Tuesday night.
- snow level above 8,000 ft. today and tonight, free air freezing level 15,000 ft. Monday and Monday night, 16,000 ft. rising Tuesday and Tuesday night.
- highs 84-82 lows near 52.
- Mostly sunny and a bit cooler Wednesday and Thursday, mostly clear both nights,
- Mostly sunny and a bit cooler Friday, mostly clear Friday night,
- Mostly sunny and a bit warmer Saturday.
- free air freezing level 16,000 ft. Wednesday through Thursday, 16,000 ft. falling to 15,000 ft. Thursday night, 15,000 ft. Friday and Friday night, then 15,000 ft. rising to 16,000 ft. Saturday.
- highs 80-72 warming to 75 Saturday lows 49-52 cooling back to 49 Thursday night.
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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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