Here is my weekly weather quiz question for the last time. What is a “Lightning Channel? Here is the correct answer. A Lightning Channel is the irregular path through the air along which a lightning discharge occurs. A typical discharge of flash between the ground and the cloud is actually a composite flash which is composed of several sequential lightning strokes, each of which is initiated by a leader and terminated by a return streamer.
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An Upper Level High Pressure Ridge (“Arch” shape) takes over bringing a heat wave. The graphics for days 1-3 show system, show no frontal systems approaching the Pacific Northwest. The graphics for days 3-7 Tuesday through next Saturday show a quiet weather pattern with a complex frontal system lingering offshore through Thursday and then pushing through Oregon next Friday and Saturday.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 30 in the good category measuring Ozone.
Oakridge: The Air Quality Index is 52 in the Moderate 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
- A HEAT ADVISORY IS IN EFFECT FROM 2 PM TODAY UNTIL 11 PM SUNDAY FOR THE NORTH OREGON COAST AND THE CENTRAL OREGON COAST.
- A HEAT ADVISORY IS IN EFFECT FROM 2 PM TODAY UNTIL 8 PM MONDAY THE COAST RANGE OF NORTHWESTERN OREGON, THE CENTRAL COAST RANGE OF WESTERN OREGON, THE LOWER COLUMBIA, THE GREATER PORTLAND METRO AREA, THE CENTRAL WILLAMETTE VALLEY, THE SOUTH WILLAMETTE VALLEY, THE NORTHERN OREGON CASCADE FOOTHILLS, THE CASCADE FOOTHILLS IN LANE COUNTY.
- A HEAT ADVISORY IS IN EFFECT FROM NOON TODAY UNTIL 11 PM SUNDAY FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
- A HEAT ADVISORY IS IN EFFECT FROM NOON TODAY UNTIL 11 PM SUNDAY FOR CENTRAL DOUGLAS COUNTY , EASTERN CURRY COUNTY AND JOSEPHINE COUNTY, THE EASTERN DOUGLAS COUNTY FOOTHILLS, JACKSON COUNTY, THE SISKIYOU MOUNTAINS, AND THE SOUTHERN OREGON CASCADES..
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:
- Sunny and a bit warmer today, clear tonight,
- Sunny and a bit warmer, Hot, Sunday, mostly clear at night,
- Mostly sunny and a bit cooler Monday, then mostly clear Monday night.
- highs 87-93 cooling back to 87 Monday lows 55-59 cooling to 55 Monday night.
- Mostly sunny and a bit cooler Tuesday and Wednesday, mostly clear both nights,
- Some AM clouds, mostly sunny and a bit cooler Thursday afternoon, partly cloudy Thursday night,
- Then partly cloudy and a bit cooler Friday.
- highs 86-77 lows near 54. (seasonal averages high 68 low 44)
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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
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Eugene-Springfield Pollen Count:
Grass Pollen: High (34)
Weeds: Moderate (17)
Tree Pollen: High (292)
Last counted: 5.12.23
Data courtesy of Oregon Allergy Associates.
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Forecast for the Umpqua Valley including Roseburg:
- Sunny and a bit warmer today, clear tonight,
- Sunny and a bit warmer Sunday, mostly clear at night,
- Mostly sunny and a bit cooler Monday, then mostly clear Monday night.
- highs 85-97 lows 60-62 cooling to 58 Monday night.
- Mostly sunny and a bit cooler Tuesday and Wednesday, mostly clear both nights,
- Some AM clouds, sunny and a bit cooler Thursday afternoon, mostly clear in the evening, partly cloudy late Thursday night,
- Some AM clouds, then sunny Friday afternoon.
- highs 92-82 lows 58-56. (seasonal averages high 71 low 48)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Sunny and warmer today, clear tonight,
- Sunny and warmer Sunday, mostly clear at night,
- AM clouds, sunny and cooler Monday afternoon, mostly clear in the evening, partly cloudy late Monday night.
- highs 76-87 cooling to 69 Monday lows 56-50.
- Partly cloudy and a bit cooler Tuesday, partly cloudy Tuesday night,
- Partly cloudy and a bit cooler Wednesday through Thursday night,
- Mostly cloudy start, then partly cloudy Friday afternoon.
- highs 68-65 lows near 50. (seasonal averages high 60 low 48)
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Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Sunny and a bit warmer today, clear tonight,
- Mostly sunny and a bit cooler Sunday with a slight (20%) chance of afternoon showers, partly cloudy with a (30%) chance of evening showers, just partly cloudy late at night,
- Mostly sunny with a slight (20%) chance of AM showers, 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 and a slight (20%) chance of thunderstorms, then just partly cloudy late Monday night.
- free air freezing level 13,000 ft. rising to 14,000 ft. this afternoon, 14,000 ft. falling to 13,000 ft. late tonight, then snow level above 8,000 ft. Sunday through Monday night.
- highs 72-69 warming to 70 Monday lows 47-44.
- Mostly sunny and a bit warmer Tuesday and Wednesday, mostly clear both nights,
- Mostly sunny Thursday, partly cloudy with a slight (20%) chance of evening showers, just partly cloudy late Thursday night,
- Some AM clouds, then mostly sunny and a bit cooler with a slight (20%) chance of showers Friday afternoon.
- free air freezing level 12,000 ft. Tuesday through Wednesday, 13,000 ft. Wednesday night and Thursday, then snow level above 8,000 ft. Thursday night and Friday.
- highs 74-72 lows 45-47.