Apr
12.
Here is my weekly weather quiz question for the last time. “What is a “Radiosonde?” Here is the correct answer. A Radiosonde is an instrument that is carried aloft by a balloon to send back information on atmospheric temperature, pressure and humidity by means of a small, expendable radio transmitter. Radiosondes can be tracked by radar, radio direction finding, or navigation systems (such as the satellite Global Positioning System) to obtain wind data.
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An Upper Lever High Pressure Ridge brings the Pacific Northwest sunshine. The graphics for days 1-3 show the frontal system to our south moving through California. The graphics for days 3-7 Tuesday through Saturday show a frontal system that moved over the Pacific Northwest Monday evening. A frontal system will be just offshore next Saturday.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 33 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 18 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 63 in the Moderate category measuring Particulate Matter.
Data courtesy of Lane Regional Air Protection Agency (LRAPA)
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ADVISORIES:
- A FLOOD WARNING IS IN EFFECT UNTIL EARLY FRIDAY APRIL 19 TH FOR THE OWYHEE RIVER BELOW THE OWYHEE DAM AFFECTING MALHEUR COUNTY.
HEALTH ADVISORIES:
- 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 a slight (20%) chance of AM showers, a mix of clouds and sun and a bit warmer with a good (50%) chance of showers this afternoon (0.25 in. of rain possible), mostly cloudy with a good (50%) chance of evening showers and a slight (20%) chance of thunderstorms, a good (50%) chance of showers tonight (0.50 in. of rain possible, more in storms),
- Mostly cloudy with a slight (20%) chance of AM showers, a mix of clouds and sun and a bit cooler Sunday afternoon, partly cloudy in the evening, mostly cloudy late at night,
- Mostly cloudy with a slight (20%) chance of AM rain, a mix of clouds and sun and a bit cooler with a slight (20%) chance of rain Monday afternoon, then mostly cloudy with a slight (20%) chance of rain Monday night.
- highs 66-58 lows 46-38.
- A mix of clouds and sun with a (30%) chance of rain Tuesday, partly cloudy in the evening, mostly clear late Tuesday night,
- Then sunny and a bit warmer Wednesday, Thursday, and Friday, mostly clear each night.
- highs 58-73 lows 36-42. (seasonal averages high 61 low 40)
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EUGENE-SPRINGFIELD POLLEN COUNT:
GRASS: ABSENT (0)
TREES: HIGH (149)
WEEDS: ABSENT (0)
Measured 4.11.24
Data courtesy of Oregon Allergy Associates.
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Home Wood Heating Advisory:
Eugene-Springfield: GREEN- Burning wood in wood stoves or fireplaces is allowed.
Oakridge: GREEN- Burning wood in wood stoves or fireplaces is allowed.
*Pellet stoves can be used anytime since they don’t produce the particulate smoke.
Data courtesy of Lane Regional Air Protection Agency (LRAPA)
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Forecast for the Umpqua Valley including Roseburg:
- Mostly cloudy with a slight (20%) chance of AM thunderstorms, a bit warmer with a showers likely (70%) and a slight (20%) chance of thunderstorms this afternoon (0.10 in. of rain possible), evening showers likely (70%) with a slight (20%) chance of thunderstorms, rain likely (70%) late tonight (0.25 in. of rain possible),
- Mostly cloudy with a (40%) chance of AM rain, a slight (20%) chance of showers and a bit cooler Sunday afternoon (under 0.10 in. of rain possible), just mostly cloudy at night,
- Mostly cloudy and a bit cooler Monday, then mostly cloudy at night.
- highs 62-58 lows 48-40.
- Mostly cloudy with a slight (20%) chance of AM showers, partly cloudy and a bit warmer with a slight (20%) chance of showers Tuesday afternoon, partly cloudy in then evening showers, mostly clear late Tuesday night,
- Then mostly sunny and a bit warmer Wednesday, Thursday, and Friday, mostly clear Wednesday night and Thursday night.
- highs 62-76 lows 38-44. (seasonal averages high 62 low 42)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly cloudy and a bit warmer with a good (50%) chance of showers today (under 0.10 in. of rain possible), cloudy with a (40%) chance of coastal evening showers and a (40%) chance of coastal rain late tonight while inland evening showers likely (70%) with inland rain likely (70%) late tonight (0.10 in. of rain possible),
- Mostly cloudy with a (30%) chance of AM rain, just mostly cloudy and a bit cooler Sunday afternoon and at night,
- Then mostly cloudy Monday and Monday night.
- highs 60-56 lows 47-40.
- Partly cloudy with a slight (20%) chance of showers Tuesday, partly cloudy Tuesday night,
- Mostly sunny and a bit warmer Wednesday, mostly clear at night,
- Mostly sunny and a bit warmer Thursday, partly cloudy Thursday night,
- Then partly cloudy and a bit cooler Friday.
- highs 56-68 cooling to 65 Friday lows 39-44. (seasonal average high 56 low 44)
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Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly cloudy with a slight (20%) chance of AM showers, showers with a slight (20%) chance of thunderstorms and a bit warmer this afternoon (0.50 in. of rain possible), evening showers with a slight (20%) chance of thunderstorms, showers likely (70%) late tonight (0.75 in. of rain possible, more in storms),
- Mostly cloudy with AM showers likely (70%), cooler with a good (50%) chance of rain and snow showers Sunday afternoon, a good (50%) chance of evening rain showers with a (40%) of snow showers, a slight (20%) chance of rain and snow showers late Sunday night,
- Mostly cloudy with a good (50%) chance of AM snow and a slight (20%) chance of rain, partly cloudy with a (30%) chance of snow with a slight (20%) chance of and a bit cooler Monday, then mostly cloudy with a good (50%) chance of snow and rain Monday night.
- snow level 7,500 ft. today and tonight, 6.500 ft. falling to 5,500 ft. Sunday afternoon, 5,000 ft. falling to 3,500 ft. late Sunday night, 3,000 ft. Monday, then 3,500 ft. Monday night.
- highs 53-43 lows 38-28.
- A mix of clouds and sun with a good (50%) chance of snow and rain Tuesday, partly cloudy with a slight (20%) chance of snow showers Tuesday night,
- Sunny and a bit warmer with a slight (20%) chance of snow showers Wednesday, becoming mostly clear late at night,
- Then sunny and a bit warmer Thursday and Friday, clear Thursday night.
- snow level 3,000 ft. Tuesday, 3,500 ft. Tuesday night, 4,000 ft. Wednesday, free air freezing level 9,000 ft. Wednesday night, then 10,000 ft. Thursday through Friday.
- highs 43-60 lows 27-33.
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