Sep
10.
Here is my weekly weather quiz question. What is a “Squall?”
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An Upper Level Low Pressure Trough gives us onshore flow for a while. The graphics for days 1-3 show a cold frontal system pushing through the Pacific Northwest today. The graphics for days 3-7 Friday through Tuesday show a cold front sliding through the Pacific Northwest Saturday night and next Sunday.
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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 11 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 12 in the Good category measuring Particulate Matter.
Data courtesy of Lane Regional Air Protection Agency (LRAPA.org)
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ADVISORIES:
- AN AIR QUALITY ALERT IS IN EFFECT FOR WILDFIRE SMOKE UNTIL 5 PM WEDNESDAY FOR DOUGLAS, KLAMATH, AND LAKE COUNTIES.
- AN AIR QUALITY ADVISORY IS IN EFFECT FOR WILDFIRE SMOKE UNTIL 5 PM WEDNESDAY FOR CROOK, DESCHUTES, GRANT, AND JEFFERSON COUNTIES.
- AN AIR QUALITY ADVISORY IS IN EFFECT FOR WILDFIRE SMOKE UNTIL 11 AM WEDNESDAY FOR HARNEY COUNTY.
- AN AIR QUALITY ADVISORY IS IN EFFECT FOR WILDFIRE SMOKE UNTIL 5 PM WEDNESDAY FOR THE CASCADES OF LANE COUNTY.
- A RED FLAG WARNING IS IN EFFECT FOR LIGHTNING FROM NOON MDT UNTIL 9 PM MDT WEDNESDAY FOR THE BURNS BLM, THE VALE BLM, AND THE BAKER VALLEY.
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:
- Increasing clouds with showers and a slight (20%) chance of thunderstorms tonight (0.25 in. of rain possible, more in storms),
- Mostly cloudy and cooler with showers and a slight (20%) chance of thunderstorms Wednesday (0.50 in. of rain possible, more in storms), evening showers with a slight (20%) chance of thunderstorms, showers likely (70%) late Wednesday night (under 0.10 in. of rain possible, more in storms),
- Mostly cloudy with a good (50%) chance of AM showers, partly cloudy and a bit warmer with a good (50%) chance of showers Thursday afternoon, partly cloudy in the evening, mostly clear late at night,
- Mostly sunny and a bit warmer Friday, mostly clear in the evening, then partly cloudy late Friday night.
- lows 54-49 highs 70-78.
- A mix of clouds and sun and a bit cooler Saturday, mostly cloudy with a slight (20%) chance of showers Saturday night,
- Mostly cloudy and a bit cooler with a good (50%) chance of showers Sunday and at night,
- Mostly cloudy with a good (50%) chance of showers and a bit cooler Monday, a (50%) chance of showers Monday night,
- Then mostly cloudy and a bit cooler with showers likely (70%) Tuesday.
- highs 77-69 lows 52-50. (seasonal averages high 80 low 49)
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Your Saturday College Football Weather Forecast:
Saturday September 14th:
Ducks vs Beavers at Reser Stadium, Corvallis Game time 12:30 pm- Preliminary Weather forecast: Partly cloudy 65 degrees warming to 72 degrees by the end of the game.
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Forecast for the Umpqua Valley including Roseburg:
- Partly cloudy with slight (20%) chance of evening thunderstorms, mostly cloudy a good (50%) chance of late evening showers, and a (40%) chance of showers late tonight (under 0.10 in. of rain possible),
- Mostly cloudy with AM showers and a slight (20%) chance of thunderstorms, cooler with showers likely (70%) and a slight (20%) chance of thunderstorms Wednesday afternoon (0.25 in. of rain possible), showers and a slight (20%) chance evening thunderstorms (0.50 in. of rain possible), a good (50%) chance of showers late Wednesday night (under 0.10 in. of rain possible),
- Mostly cloudy with a (30%) chance of AM showers, partly cloudy and a bit warmer with a (30%) chance of showers Thursday afternoon, mostly clear at night,
- Mostly sunny sunny and a bit warmer Friday, then mostly clear Friday night.
- lows 56-52 highs 68-79.
- Partly cloudy Saturday, a slight (20%) chance of evening showers, mostly cloudy with a slight (20%) chance of showers late Saturday night,
- Mostly cloudy and a bit cooler with a (30%) chance of showers Sunday, a (40%) chance of showers at night,
- Mostly cloudy and a bit cooler with a (20%) chance of showers Monday, a (40%) chance of showers Monday night,
- Mostly cloudy with a good (50%) chance of AM showers, then showers likely (70%) and a bit cooler Tuesday afternoon.
- highs 79-69 lows near 54. (seasonal averages high 82 low 53)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly cloudy with a slight (20%) chance of evening coastal thunderstorms and coastal showers and a slight (20%) chance of thunderstorms late tonight while mostly cloudy inland showers likely (70%) and a slight (20%) chance of thunderstorms tonight (0.10 in. of rain possible),
- Mostly cloudy with AM showers and a slight (20%) chance of thunderstorms, a good (50%) chance of showers and a slight (20%) chance of thunderstorms and a bit cooler Wednesday afternoon (0.25 in. of rain possible), evening showers likely (70%), a good (50%) chance of showers late Wednesday night (under 0.10 in. of rain possible),
- Mostly cloudy with slight (20%) chance of AM showers, partly cloudy and a bit warmer with a slight (20%) chance of showers Thursday afternoon, mostly clear at night,
- Sunny and a bit warmer Friday, mostly clear in the evening, then mostly cloudy late Friday night.
- lows 57-52 highs 65-67 warming back to 65 Friday night.
- Mostly cloudy start, partly cloudy Saturday afternoon, mostly cloudy with a slight (20%) chance of showers Saturday night,
- Mostly cloudy and a bit cooler with a (40%) chance of showers Sunday, a (40%) chance of showers at night,
- Mostly cloudy and a bit cooler Monday with a (30%) chance of showers, a good (50%) chance of showers Monday night,
- Mostly cloudy with a good (50%) chance of AM showers, then showers likely (70%) and a bit cooler Tuesday afternoon.
- highs 65-62 lows near 54. (seasonal average high 67 low 52)
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Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly cloudy with a good (50%) chance of evening showers and a slight (20%) chance of thunderstorms late tonight (0.10 in. of rain possible, more in storms),
- Mostly cloudy and hazy with AM showers and a slight (20%) chance of thunderstorms, showers with a (30%) chance of thunderstorms and cooler Wednesday afternoon, showers with a (40%) chance of thunderstorms Wednesday night,
- Mostly cloudy with a good (50%) chance of AM showers, a mix of clouds and sun and a bit warmer with a slight (20%) chance of showers Thursday afternoon, just partly cloudy at night,
- Sunny and warmer Friday, mostly clear in the evening, then partly cloudy late Friday night.
- free air freezing 12,000 ft. this evening, snow level 8,000 ft. Wednesday, 7,500 ft. Wednesday night and Thursday, free air freezing level 12,000 ft. rising to 13,000 ft. Thursday night, then 13,000 ft. Friday and Friday night.
- lows 40-36 warming to 42Friday night highs 48-65.
- Mostly sunny Saturday, partly cloudy with a slight (20%) chance of evening showers, mostly cloudy with a slight (20%) chance of showers Saturday night,
- AM clouds and sun with a good (50%) chance of AM showers, mostly cloudy and a bit cooler with a good (50%) chance of showers Sunday afternoon, mostly cloudy with a good (50%) chance of showers at night,
- Mostly cloudy with a good (50%) of AM showers, partly cloudy and a bit cooler with a good (50%) chance of showers Monday afternoon and Monday night,
- Then mostly cloudy and a bit cooler with showers likely (70%) Tuesday.
- free air freezing level 13,000 Saturday, snow level above 8,000 ft. Saturday night through Monday night, then 8,000 ft. Tuesday.
- highs 64-49 lows 42-38.