Here is my weekly weather quiz question. What is a “Lightning Channel?
_________________
An Upper Level Low (“U” shape) is moving eastward and will weaken the moisture flow to the Pacific Northwest to be replaced by a High Pressure Ridge (“Arch” shape). The graphics for days 1-3 show the frontal system, show no frontal systems approaching the Pacific Northwest. The graphics for days 3-7 Saturday through next Wednesday show a quiet weather pattern with a frontal system lingering offshore next Wednesday.
________________
Air Quality Index:
Eugene/Springfield: The Air Quality Index is 34 in the good category measuring Ozone.
Oakridge: The Air Quality Index is 12 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 32 in the Good category measuring Ozone.
Data courtesy of Lane Regional Air Protection Agency (LRAPA)
________________
ADVISORIES
- A FLOOD WARNING IS IN EFFECT FOR THE SILVIES RIVER NEAR BURNS AFFECTING HARNEY COUNTY UNTIL THURSDAY MORNING DUE TO RAIN AND SNOW MELT.
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.
__________
Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:
- Partly cloudy, a slight (20%) chance of evening thunderstorms, just partly cloudy late tonight,
- Some AM clouds, sunny and a bit warmer Thursday, partly cloudy Thursday night,
- Mostly sunny and a bit warmer Friday, mostly clear at night,
- Sunny and a bit warmer Saturday, then clear Saturday night.
- lows 46-57 highs 73-87.
- Sunny and a bit warmer, Hot, Sunday, mostly clear Sunday night,
- Mostly sunny start, partly cloudy and a bit cooler Monday with a slight (20%) chance of afternoon showers, partly cloudy at night,
- Mostly sunny and a bit cooler Tuesday, mostly clear Tuesday night,
- Some AM clouds, then mostly sunny and a bit cooler Wednesday afternoon.
- highs 93-82 lows 59-54. (seasonal averages high 67 low 43)
__________
Home Wood Heating Advisory:
Posted Daily
Eugene-Springfield: GREEN– Burning is Allowed.
Oakridge: GREEN– Burning is Allowed.
*Note: Pellet stoves may be used anytime if they produce no visible emissions.
Data courtesy of Lane Regional Air Protection Agency (LRAPA
__________
Eugene-Springfield Pollen Count:
Grass Pollen: Moderate (12)
Tree Pollen: High (330)
Last counted: 5.8.23
Data courtesy of Oregon Allergy Associates.
__________
Forecast for the Umpqua Valley including Roseburg:
- Mostly cloudy with a (30%) chance of evening showers and a slight (20%) chance of thunderstorms, a (%) chance of rain with patchy fog late tonight,
- Some AM clouds with patchy fog, sunny and a bit warmer Thursday afternoon, partly cloudy Thursday night,
- Mostly sunny and a bit warmer Friday, mostly clear at night,
- Sunny and warmer Saturday, then clear Saturday night.
- lows 48-60 highs 76-92.
- Sunny and a bit warmer Sunday, mostly clear Sunday night,
- AM sun, partly cloudy and a bit cooler with a slight (20%) chance of of thunderstorms Monday afternoon, a slight (20%) chance of evening thunderstorms, mostly clear at night,
- Mostly sunny and a bit cooler Tuesday and Wednesday, mostly clear Tuesday night,
- highs 97-84 lows 62-57. (seasonal averages high 70 low 47)
.
___________
Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly cloudy with patchy fog late tonight,
- Mostly cloudy start, sunny and a bit warmer Thursday afternoon, mostly cloudy Thursday night,
- Some AM clouds, sunny and a bit warmer Friday, mostly clear at night,
- Sunny and warmer Saturday, then clear Saturday night.
- lows 46-44 warming to 56 Saturday night highs 63-80.
- Sunny and warmer Sunday, mostly clear Sunday night,
- Mostly sunny and cooler Monday, partly cloudy and a bit cooler at night,
- Partly cloudy and a bit cooler Tuesday, partly cloudy Tuesday night,
- Then partly cloudy Wednesday.
- highs 87-66 lows 55-49. (seasonal averages high 60 low 47)
__________
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly cloudy with a good (50%) chance of evening showers and thunderstorms (0.10 in. of rain possible, more in storms), just partly cloudy late tonight,
- Partly cloudy and a bit warmer Thursday, partly cloudy Thursday night,
- Mostly sunny and a bit warmer Friday, mostly clear at night,
- Sunny and a bit warmer Saturday, then clear Saturday night.
- snow level 7,500 ft. tonight, free air freezing level 8,000 fr. rising to 9,000 ft. Thursday afternoon, 10,000 ft. Thursday night, 11,000 ft. Friday, 12,000 ft. Friday night, 13,000 ft. Saturday, then 14,000 ft. Saturday night.
- lows 36-47 highs 60-72.
- Sunny Sunday, partly cloudy with a slight (20%) chance of evening showers, just partly cloudy late Sunday night,
- AM sun, a mix of clouds and sun with a (40%) chance of showers and a slight (20%) chance of thunderstorms Monday afternoon, partly cloudy with a (40%) chance of evening showers, just partly cloudy at night,
- Mostly sunny and a bit warmer with a slight (20%) chance of showers Tuesday afternoon, just partly cloudy late Tuesday night,
- Mostly sunny start, then partly cloudy and a bit warmer with a slight (20%) chance of showers Wednesday afternoon.
- free air freezing level 14,000 ft. Sunday, then snow level above 8,000 ft. Sunday night through Tuesday night.
- highs 72-70 warming back to 72 Tuesday and Wednesday lows 47-45.