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 Tuesday. The graphics for days 3-7 Saturday through Wednesday 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 TODAY FOR DOUGLAS, KLAMATH, AND LAKE COUNTIES.
- AN AIR QUALITY ADVISORY IS IN EFFECT FOR WILDFIRE SMOKE UNTIL 5 PM TODAY FOR CROOK, DESCHUTES, GRANT, AND JEFFERSON COUNTIES.
- AN AIR QUALITY ADVISORY IS IN EFFECT FOR WILDFIRE SMOKE UNTIL 11 AM TODAY FOR HARNEY COUNTY.
- AN AIR QUALITY ADVISORY IS IN EFFECT FOR WILDFIRE SMOKE UNTIL 5 PM TODAY FOR THE CASCADES OF LANE COUNTY.
- A RED FLAG WARNING IS IN EFFECT FOR LIGHTNING FROM NOON MDT UNTIL 9 PM MDT TODAY 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:
- Mostly cloudy and cooler with showers and a slight (20%) chance of thunderstorms today (0.50 in. of rain possible, more in storms), evening showers with a slight (20%) chance of thunderstorms, showers likely (70%) late tonight (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.
- highs 70-78 lows 54-49.
- 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:
- Mostly cloudy with AM showers and a slight (20%) chance of thunderstorms, cooler with showers likely (70%) and a slight (20%) chance of thunderstorms this 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 tonight (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.
- highs 68-79 lows 55-52.
- 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 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 this afternoon (0.25 in. of rain possible), evening showers likely (70%), a good (50%) chance of showers late tonight (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.
- highs 65-67 warming back to 65 Friday night lows 54-50.
- 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 and hazy with AM showers and a slight (20%) chance of thunderstorms, showers with a (30%) chance of thunderstorms and cooler this afternoon, showers with a (40%) chance of thunderstorms tonight,
- 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.
- snow level 8,000 ft. today, 7,500 ft. tonight and Thursday, free air freezing level 12,000 ft. rising to 13,000 ft. Thursday night, then 13,000 ft. Friday and Friday night.
- highs 48-65 lows 38-36 warming to 42 Friday night.
- 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.