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. Over the weekend we see increased Zonal Airflow (west to east) across Oregon. The graphics for days 1-3 show a frontal system approaching from the north. The graphics for Days 3-7 show a frontal system moving down from the north Tuesday, and still another frontal system coming from the northwest Thursday moving through Thursday night.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 26 in the Good category measuring Ozone.
Oakridge: The Air Quality Index is 25 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)
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ADVISORIES:
- A FIRE WEATHER WATCH IS IN EFFECT FROM SUNDAY AFTERNOON UNTIL SUNDAY EVENING FOR ABUNDANT LIGHTNING ON DRY FUELS FOR THE 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:
- Mostly sunny but a bit cooler today, mostly clear tonight,
- Sunny and hot Sunday, clear Sunday night,
- Sunny and a bit cooler Monday, then clear at night.
- highs 92-96 cooling to 90 Monday lows 57-54.
- Sunny Tuesday, clear Tuesday night,
- Mostly sunny and a bit cooler Wednesday, Thursday, and Friday, mostly clear each night,
- highs 90-83 lows 54-52. (seasonal averages high 82 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:
- Partly cloudy with a slight (20%) chance of AM thunderstorms, breaking out to sunny and Hot this afternoon, mostly clear tonight,
- Sunny and a bit hotter Sunday, clear at night,
- Sunny and hot but a bit cooler Monday, then clear Monday night.
- highs 96-98 cooling back to 96 Monday lows 60-62.
- Sunny and slightly warmer Tuesday, clear in the evening, partly cloudy late at night and Wednesday AM, sunny but just a bit cooler in the afternoon, mostly clear Wednesday night,
- Mostly sunny and a bit cooler Thursday, mostly clear at night,
- Then sunny and a bit cooler Friday.
- highs 97-86 lows near 57. (seasonal averages high 84 low 56)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Some AM clouds, sunny this afternoon, mostly clear this evening, partly cloudy late tonight and Sunday AM, mostly sunny and slightly warmer Sunday afternoon, mostly clear in the evening, partly cloudy late at night,
- Mostly cloudy in the AM, partly cloudy and a bit cooler Monday afternoon, mostly clear Monday night.
- highs 68-70 cooling back to 68 Monday lows near 55.
- Mostly sunny and a bit cooler Tuesday, mostly clear Tuesday night,
- Partly cloudy and slightly warmer Wednesday and at night,
- Mostly sunny and a bit cooler Thursday, mostly clear Thursday night,
- Then sunny and a bit warmer Friday.
- highs 68-66 warming to 70 Friday lows near 54. (seasonal averages high 65 low 53)
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Forecast for the Cascades in Lane County:
- AM clouds, mostly sunny this afternoon, mostly clear tonight,
- Sunny and a bit warmer Sunday with a slight (20%) chance of afternoon and evening thunderstorms, clear late Sunday night,
- Sunny and a bit cooler Monday, then clear Monday night.
- free air freezing level 15,000 ft. today and tonight, snow level above 8,000 ft. Sunday and Sunday night, free air freezing level 15,000 ft. Monday, then 16,000 ft. Monday night.
- highs 82-84 cooling back to 82 Monday lows near 53.
- Sunny and a bit cooler Tuesday, mostly clear Tuesday night,
- Mostly sunny and a bit cooler Wednesday and Thursday, mostly clear both nights,
- AM sun, then partly cloudy and a bit cooler Friday.
- free air freezing level 16,000 ft. rising to above 16,000 ft. Tuesday afternoon, above 16,000 ft. Tuesday night through Thursday, then 16,000 ft. Thursday night and Friday.
- highs 80-72 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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