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 into Monday. 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 between Wednesday and Thursday. There will be another front pushing through the Pacific Northwest next Saturday.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 40 in the Good category measuring Ozone.
Oakridge: The Air Quality Index is 9 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 43 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 clear tonight,
- Mostly cloudy and much cooler Sunday, mostly cloudy with a slight (20%) chance of evening showers, just mostly cloudy late Sunday night,
- AM clouds, partly cloudy and a bit cooler Monday afternoon and at night,
- Partly cloudy Tuesday AM, mostly sunny and a bit warmer Tuesday, then partly cloudy Tuesday night.
- lows 48-42 highs 70-67 warming back to 70 Tuesday.
- Partly cloudy and a bit warmer Wednesday and Wednesday night,
- Partly cloudy Thursday and Thursday night,
- AM clouds sun, a mix of clouds and sun with a slight (20%) chance of showers and a bit cooler Friday, partly cloudy with a slight (20%) chance of evening showers, mostly cloudy with a slight (20%) chance of showers at night,
- Then mix of clouds and sun and a bit cooler with a (40%) chance of showers Saturday.
- highs 73-69 lows near 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:
- Mostly clear tonight,
- Partly cloudy Sunday AM, becoming mostly cloudy and cooler in the afternoon, partly cloudy in the evening, mostly cloudy and cooler late Sunday night,
- AM clouds, partly cloudy and a bit cooler Monday afternoon and at night,
- Then partly cloudy and a bit warmer Tuesday and Tuesday night.
- lows 53-47 highs 75-70 warming to 73 Tuesday.
- Partly cloudy and a bit warmer Wednesday through Thursday, mostly clear in the evening, partly cloudy late Thursday night,
- Partly cloudy cloudy and a bit cooler Friday and in the evening, mostly cloudy with a slight (20%) chance of showers late at night,
- Mostly cloudy with a slight (20%) chance of showers Saturday AM, then partly cloudy and a bit cooler with a slight (20%) chance of showers Saturday afternoon.
- highs 78-74 lows 52-50. (seasonal averages high 73 low 50)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Partly cloudy this evening, mostly cloudy late tonight at the shore while mostly clear inland late tonight,
- Mostly cloudy and a bit cooler with a slight (20%) chance of coastal showers Sunday afternoon, just mostly cloudy at night,
- AM clouds, partly cloudy and slightly warmer Monday afternoon, mostly clear in the evening, mostly cloudy late Monday night,
- Partly cloudy Tuesday, then partly cloudy at night.
- lows 52-48 warming to 50 Tuesday night highs 60-62.
- Just partly cloudy Wednesday through Friday evening, mostly cloudy with a slight (20%) chance of showers late Friday night,
- Mostly cloudy with a slight (20%) chance of showers Saturday AM, then partly cloudy with a slight (20%) chance of showers in the afternoon.
- highs near 62 lows near 52. (seasonal averages high 61 low 49)
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Forecast for the Cascades in Lane County:
- Mostly clear tonight,
- Partly cloudy and a bit cooler Sunday, mostly cloudy in the evening, partly cloudy late at night,
- A mix of clouds and sun and cooler Monday, partly cloudy Monday night and Tuesday AM, mostly sunny and a bit warmer Tuesday afternoon, then partly cloudy Tuesday night.
- free air freezing level 13,000 ft. tonight, 13,000 ft. falling to 12,000 ft. Sunday afternoon, 11,000 ft. falling to 10,000 ft. late Sunday night, 8,000 ft. Monday afternoon, 9,000 ft. rising to 10,000 ft. late Monday night, 9,000 ft. rising to 10,000 ft. Tuesday afternoon, then 11,000 ft. rising to 12,000 ft. late Tuesday night.
- lows 45-34 warming to 38 Tuesday night highs 67-54 warming to 59 Tuesday.
- Partly cloudy and a bit warmer with a slight (20%) chance of showers Wednesday and in the evening, just partly cloudy at night,
- Partly cloudy and a bit cooler with a slight (20%) chance of showers Thursday afternoon and in the evening, partly cloudy and a bit cooler Thursday night through Friday evening, mostly cloudy with a (30%) chance of showers late Friday night,
- A mix of clouds and sun with a (30%) chance of AM showers, then a slight (20%) chance of afternoon showers and a bit cooler.
- free air freezing level 11,000 ft. Wednesday, 12,000 ft. Wednesday night through Friday,
- highs 66-59 lows 42-39.
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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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