Check out my latest Eugene Daily News Weather Or Not column:
http://eugenedailynews.com/2018/05/youve-seen-them-fly-but-did-you-know-they-also-can-sail/
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Here is my weekly weather quiz question for the last time. What is an “Easterly Wave?” Here is the correct answer. An Easterly Wave is a low level disturbance of tropical origins. Easterly waves can develop into tropical cyclones. However, tropical cyclone development is not required in order for these systems to produce significant amounts of rainfall. The easterly waves are primarily a summer phenomenon. 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) is moving through bringing a frontal system our way. The graphics for days 1-3 show frontal system coming here today. An Upper Level High Pressure Ridge (Shaded “Arch” shape with arrows) takes over by Sunday through Memorial Day. The graphics for days 3-7 show the next storm systems that will approach and try to move through the Pacific Northwest Monday night through next Friday.
Note: The weather should be just right for the athletes at the Prefontaine Classic.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 10 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 7 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 PUBLIC HEALTH ADVISORY FOR HIGHER-THAN-NORMAL LEVELS OF BACTERIA IN OCEAN WATERS AT SUNSET BAY STATE PARK BEACH IN COOS COUNTY HAS BEEN CANCELLED. AUTHORITIES SAY IT IS SAFE TO CONTINUE OTHER ACTIVITIES ON THE BEACH THAT DO NOT INCLUDE CONTACT WITH ANY WATER THAT POOLS ON THE BEACH THAT COULD BE CONTAMINATED BY BIRD OR OTHER ANIMAL FECAL MATTER.
- 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 cloudy with possible sun peeks today and a slight (20%) chance of AM drizzle, partly cloudy tonight and Sunday AM, mostly sunny and a bit warmer Sunday afternoon, mostly clear at night,
- A mix of clouds and sun in the AM, mostly sunny and a bit warmer Monday afternoon (Memorial Day), partly cloudy Monday night.
- highs 65-74 lows 45-48.
- Partly cloudy and a bit cooler Tuesday and at night,
- A mix of clouds and sun and a bit cooler Wednesday, partly cloudy in the evening, mostly cloudy late Wednesday night,
- A mix of clouds and sun and a bit warmer Thursday, then partly cloudy and a bit warmer Thursday night and Friday.
- highs 68-65 warming to 69 Friday lows near 45. (seasonal averages high 69 low 45)
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Eugene-Springfield Pollen Count
Grass………. High (151)
Trees………. Moderate (19)
Last Counted: 5/25/18
Data Courtesy of Oregon Allergy Associates
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Forecast for Roseburg:
- Mostly cloudy this AM, partly cloudy and a bit warmer this afternoon and tonight,
- Partly cloudy in the AM, mostly sunny and a bit warmer Sunday afternoon, mostly clear Sunday night,
- Mostly sunny and a bit warmer Monday (Memorial Day), then mostly clear at night.
- highs 68-77 lows 48-52.
- Partly cloudy and a bit cooler Tuesday, mostly clear at night,
- Partly cloudy Wednesday through Thursday night,
- Then Partly cloudy and a bit warmer Friday.
- highs 73-70 warming to 72 Thursday lows near 48. (seasonal averages high 72 low 49)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly cloudy and a bit warmer this afternoon, partly cloudy tonight and Sunday AM, mostly sunny and a bit warmer Sunday afternoon, mostly clear in the evening, partly cloudy late Sunday night,
- AM clouds, mostly sunny and a bit warmer Monday (Memorial Day), then mostly clear in the evening and partly cloudy late at night.
- highs 68-77 lows 48-52.
- Partly cloudy and a bit cooler Tuesday and at night,
- Partly cloudy Wednesday through Thursday night,
- Then partly cloudy and a bit warmer Friday.
- highs 73-70 warming to 72 Thursday lows near 48. (seasonal averages high 72 low 49)
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Forecast for the Cascades in Lane County:
- Mostly cloudy this AM, a mix of clouds and sun this afternoon, just partly cloudy tonight and Sunday AM, mostly sunny and a bit warmer in the afternoon, mostly clear Sunday night,
- Mostly sunny and a bit warmer Monday (Memorial Day), then mostly clear at night.
- free air freezing level 8,000 ft. today and tonight, 9,000 ft. Sunday, 11,000 ft. Sunday night, then 10,000 ft. Monday and Monday night.
- highs 52-66 lows 36-42 cooling to 40 Monday night.
- Mostly sunny Tuesday AM, partly cloudy and a bit cooler in the afternoon, partly cloudy Tuesday night,
- Then partly cloudy and a bit cooler Wednesday and at night,
- Then partly cloudy and a bit warmer Friday.
- free air freezing level 10,000 ft. Tuesday, 9,000 ft. falling to 6,000 ft. Tuesday night, 6,000 ft. Wednesday, 6,500 ft. Wednesday night, 7,000 ft. Thursday, 7,500 ft. late Thursday night, then 8,000 ft. Friday afternoon.
- highs 62-54 warming to 57 Friday lows 42-36.
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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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