Check out my latest Eugene Daily News Weather Or Not column:
http://eugenedailynews.com/2018/05/introducing-the-father-of-tornado-research/
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Here is my weekly weather quiz question for the last time. What is “Effective Terrestrial Radiation?” Here is the correct answer. Effective Terrestrial Radiation is the difference between upwelling infrared or terrestrial radiation emitted from the earth and the downwelling infrared radiation from the atmosphere I’ll have a new weekly weather qui 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 arrows) is strengthening and will bring more dry weather with sunshine. We are still dryer than normal and below where we were at this time last year. We need rain, but the most we’ll see for the next week or so will be a drop-in-the-bucket compared to what we need. This could be a very bad fire season approaching. The graphics for days 1-3 show the frontal system that moves in from the northwest Sunday. An Upper Level Low Pressure Trough (Shaded “U” shape with arrows) takes over early in the week for cooler temperatures but still dry. The graphics for days 3-7 show the frontal system moving through the Pacific Northwest Saturday night Sunday and a weak disturbance tries to move through between Wednesday night and Thursday. There will be another front well offshore to the northwest by next Friday.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 31 in the Good category measuring Ozone.
Oakridge: The Air Quality Index is 12 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:
HEALTH ADVISORIES:
- A PUBLIC HEALTH ADVISORY IS IN EFFECT FOR DETROIT LAKE, LOCATED 46 MILES SE OF SALEM. THE LAKE SPANS BOTH LINN AND MARION COUNTIES. WATER MONITORING HAS CONFIRMED THE PRESENCE OF BLUE-GREEN ALGAE AND THE TOXINS THEY PRODUCE IN DETROIT LAKE. PEOPLE SHOULD AVOID SWALLOWING WATER, 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. ALSO KEEP PETS AWAY FROM THE WATER.
- 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 and warmer today, mostly clear tonight,
- A mix of clouds and sun and much cooler Sunday, mostly cloudy with a slight (20%) chance of showers Sunday late night,
- AM clouds, then partly cloudy and a bit cooler Monday and at night.
- highs 82-67 lows 49-45.
- Partly cloudy and a bit warmer Tuesday and Tuesday night,
- Partly cloudy Wednesday AM, mostly sunny and a bit warmer in the afternoon, partly cloudy at night,
- Partly cloudy and slightly warmer Thursday and Thursday night,
- Then partly cloudy Friday.
- highs 69-73 lows 43-47. (seasonal averages high 70 low 46)
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Eugene-Springfield Pollen Count
Grass………. High (41)
Trees………. Moderate (15)
Last Counted: 6/1/18
Data Courtesy of Oregon Allergy Associates
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Forecast for Roseburg:
- Sunny and warmer today, clear tonight,
- Partly cloudy Sunday AM, becoming mostly cloudy and cooler with a slight (20%) chance of showers in the afternoon, partly cloudy in the evening, mostly cloudy and cooler late Sunday night,
- AM clouds, then partly cloudy and a bit cooler Monday afternoon and at night.
- highs 85-69 lows 55-48.
- Partly cloudy and a bit warmer Tuesday and Tuesday night,
- Partly cloudy and a bit warmer Wednesday through Thursday, mostly clear Thursday night,
- Then mostly sunny Friday.
- highs 73-78 lows 47-52. (seasonal averages high 73 low 50)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- AM clouds, mostly sunny this afternoon, mostly clear this evening at the shore and mostly cloudy late tonight at the shore while mostly clear inland tonight,
- Mostly cloudy with a slight (20%) chance of coastal showers late Sunday night while just mostly cloudy inland at night,
- Partly cloudy and a bit cooler Monday and Monday night.
- highs 63-60 lows 52-49.
- Partly cloudy and a bit warmer Tuesday, partly cloudy at night,
- Just partly cloudy Wednesday through Thursday, mostly clear Thursday night,
- Then mostly sunny Friday.
- highs 60-63 lows near 48. (seasonal averages high 60 low 49)
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Forecast for the Cascades in Lane County:
- Mostly sunny and warmer today, mostly clear tonight,
- Partly cloudy and a bit cooler Sunday, partly cloudy with a slight (20%) chance of showers late at night,
- A mix of clouds and sun and cooler Monday, then partly cloudy Monday night.
- free air freezing level 13,000 ft. today and tonight, 12,000 ft. Sunday afternoon, snow level 7,000 ft. Sunday night.
- highs 72-54 lows 45-35.
- Partly cloudy and a bit warmer Tuesday and Tuesday night,
- Partly cloudy and a bit warmer Wednesday and at night,
- Then partly cloudy Thursday through Friday.
- free air freezing level 7,500 ft. Monday afternoon, 10,000 ft. late Monday night and Tuesday, 12,000 ft. late Tuesday night, 11,000 ft. Wednesday, then 12,000 ft. Wednesday night through Friday.
- highs 53-63 lows 37-42.
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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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