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 High Pressure Ridge (Shaded “Arch” shape with arrows) has taken over today through Memorial Day for more sunshine and warming. The graphics for days 1-3 show the frontal system moving through Monday night and Tuesday. An Upper Level Low Pressure Trough moves up next. The graphics for days 3-7 show the next storm systems that will approach and try to move through the Pacific Northwest Wednesday through next Sunday.
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 12 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 15 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 33 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:
- Clear tonight,
- Partly cloudy Monday AM, mostly sunny and a bit cooler Monday afternoon (Memorial Day), mostly clear in the evening, partly cloudy late Monday night,
- Partly cloudy and a bit cooler Tuesday and at night,
- Partly cloudy and a bit cooler Wednesday, then mostly cloudy late Wednesday night.
- lows 47-44 highs 73-66.
- Mostly cloudy in the AM, partly cloudy and a bit warmer Thursday afternoon, partly cloudy Thursday night,
- A mix of clouds and sun with a slight (20%) chance of showers Friday afternoon, partly cloudy with a slight (20%) chance of evening showers, mostly cloudy with a slight (20%) chance of showers late at night,
- A mix of clouds and sun with a (20%) chance of showers Saturday, partly cloudy with a slight (20%) chance of showers Saturday night,
- A slight (20%) chance of AM showers, then a mix of clouds and sun Sunday.
- highs 64-70 lows near 46. (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 clear tonight,
- Partly cloudy in the AM, sunny and a bit cooler Monday afternoon (Memorial Day), mostly clear in the evening, partly cloudy late at night and Tuesday AM, mostly cloudy and a bit cooler Tuesday afternoon and evening, partly cloudy late at night,
- Partly cloudy and slightly cooler Wednesday, mostly cloudy Wednesday night.
- lows 50-52 cooling to 46 Tuesday night warming to 48 Wednesday night highs 76-70.
- Mostly cloudy and a bit cooler Thursday, partly cloudy Thursday night,
- Partly cloudy with a slight (20%) chance of showers and a bit warmer Friday through Saturday night,
- Mostly cloudy with a slight (20%) chance of showers Sunday AM, then sunny and a bit warmer Sunday afternoon,
- highs 68-75 lows near 49. (seasonal averages high 72 low 49)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Clear this evening, mostly cloudy late tonight,
- AM clouds, mostly sunny Monday afternoon (Memorial Day), mostly clear in the evening, partly cloudy late at night and Tuesday AM, mostly cloudy and a bit cooler Tuesday afternoon, partly cloudy Tuesday night,
- Partly cloudy Wednesday, then mostly cloudy at night.
- lows 52-48 highs 62-60.
- Mostly cloudy and a bit warmer Thursday, partly cloudy at night and Friday AM, mostly cloudy and a bit warmer with a slight (20%) chance of showers Friday afternoon and Friday night,
- Partly cloudy with a slight (20%) chance of showers and a bit warmer Saturday and at night,
- Then party cloudy and a bit cooler with a slight (20%) chance of showers Sunday.
- highs 60-63 cooling back to 60 Sunday lows near 50. (seasonal averages high 60 low 49)
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Forecast for the Cascades in Lane County:
- Mostly clear tonight,
- Sunny and a bit cooler Monday (Memorial Day), partly cloudy at night,
- A mix of clouds and sun and a bit cooler Tuesday, becoming mostly cloudy in the evening, partly cloudy and colder Tuesday night,
- Partly cloudy and a bit cooler Wednesday, mostly cloudy late Wednesday night.
- free air freezing level 13,000 ft. tonight through Monday night, 12,000 ft. falling to 11,000 ft. Tuesday afternoon, snow level 10,000 ft. falling to 9,000 ft. Tuesday night, 7,500 ft. rising to 9,000 ft. Wednesday, then 10,000 ft. falling to 8,000 ft. Wednesday night.
- lows 36-39 falling to 32 Wednesday night highs 65-55.
- A mix of clouds and sun and a bit cooler Thursday, partly cloudy Thursday night,
- Partly cloudy and a bit warmer Friday and Friday night,
- Partly cloudy and a bit warmer with a slight (20%) chance of showers Saturday afternoon, a slight (20%) chance of evening showers, just partly cloudy late at night,
- Then partly cloudy and a bit warmer Sunday.
- free air freezing level 8,000 ft. Thursday through Saturday AM, snow level 6,500 ft. Saturday afternoon and evening, then free air freezing level 7,500 ft. late Saturday night and Sunday.
- highs 50-59 lows 33-38.
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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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