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) to our south is moving away. The graphics for days 1-3 show the frontal system moving through mainly to our north that brought clouds.. An Upper Level High Pressure Ridge (Shaded “Arch” shape with arrows) takes over by Sunday through Memorial Day for more sunshine and warming. 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 Saturday.
Note: All-in-all the rest of the Long Memorial Day Holiday weekend looks good.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 9 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 9 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 3 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 this evening, partly cloudy late tonight,
- A mix of clouds and sun in the AM, mostly sunny and a bit warmer Sunday afternoon, clear at night,
- Mostly sunny and a bit cooler Monday (Memorial Day), mostly clear Monday night,
- A mix of clouds and sun and a bit cooler Tuesday, then partly cloudy at night,
- lows 46-48 cooling to 44 Tuesday night highs 73-66.
- Partly cloudy and a bit cooler Wednesday and Wednesday night,
- A mix of clouds and sun and a bit warmer Thursday, partly cloudy Thursday night,
- Partly cloudy and a bit warmer Friday through Saturday AM, then mostly sunny and a bit warmer Saturday afternoon.
- highs 65-72 lows 44-47. (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 evening, partly cloudy late tonight and Sunday AM, mostly sunny and warmer in the afternoon, mostly clear Sunday night,
- Partly cloudy in the AM, sunny Monday afternoon (Memorial Day), mostly clear at night,
- Partly cloudy and a bit cooler Tuesday, partly cloudy with a slight (20%) chance of showers late Tuesday night.
- lows 48-52 cooling to 47 Tuesday night highs 77-70.
- Partly cloudy and slightly cooler Wednesday and in the evening, mostly cloudy late at night,
- Partly cloudy and a bit warmer Thursday through Friday night,
- Partly cloudy Saturday AM, then sunny and a bit warmer Saturday afternoon.
- highs 69-75 lows 47-49. (seasonal averages high 72 low 49)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly cloudy this evening, partly cloudy late tonight and Sunday AM, mostly sunny and a bit cooler Sunday afternoon, clear in the evening, partly cloudy late Sunday night,
- AM clouds, mostly sunny Monday afternoon (Memorial Day), mostly clear in the evening, partly cloudy late at night,
- Then partly cloudy and a bit cooler Tuesday and Tuesday night.
- lows 48-52 cooling back to 48 Tuesday night highs 62-59.
- Partly cloudy and a bit warmer Wednesday through Friday night,
- Partly cloudy in the AM, then sunny and a bit warmer Saturday afternoon.
- highs 60-64 lows near 48. (seasonal averages high 72 low 49)
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Forecast for the Cascades in Lane County:
- Partly cloudy tonight and Sunday AM, mostly sunny and a bit warmer in the afternoon, mostly clear Sunday night,
- Sunny and a bit warmer Monday (Memorial Day), mostly clear at night,
- Mostly sunny Tuesday AM, partly cloudy and a bit cooler in the afternoon, mostly cloudy with a slight (20%) chance of evening showers, then partly cloudy with a slight (20%) chance of showers late Tuesday night.
- free air freezing level 12,000 ft. tonight through Monday night, 11,000 ft. Tuesday, then snow level 8,000 ft. falling to 6,000 ft. Tuesday night.
- lows 37-42 cooling to 35 Tuesday night highs 65-59.
- Partly cloudy and a bit cooler Wednesday, partly cloudy with a slight (20%) chance of showers Wednesday night,
- A mix of clouds and sun Thursday with a slight (20%) of chance of showers, a slight (20%) chance of showers late at night,
- Partly cloudy and a bit warmer Friday and Friday night,
- Partly cloudy Saturday AM, then mostly sunny and a bit warmer in the afternoon.
- free air freezing level 7,000 ft. rising to 8,000 ft. Wednesday and in the evening, 7,500 ft. Wednesday night, 6,500 ft. Thursday and Thursday night, free air freezing level 8,000 ft. Friday afternoon and evening, 7,500 ft. late Friday night and Saturday AM, then 7,500 ft. rising to 11,000 ft. Saturday afternoon.
- highs 54-60 lows 35-38.
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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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