Here is my weekly weather quiz question for the last time. What is a “Tornado Family “? Here is the correct answer. A Tornado Family is a series of tornadoes produced by a single supercell, resulting in damage path segments along the same general line.
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An Upper Level High Pressure Ridge (“Arch” shape) is moving eastward headed away from the Pacific Northwest. The graphics for days 1-3 show a complex frontal system moving over Oregon between today with another front close behind it. The graphics for days 3-7 Tuesday through Saturday show surface high pressure Tuesday through Wednesday, then a complex frontal system slides in Thursday and next Friday.
Note: Ski Report: Willamette Pass Ski announced it is open now for early season skiing 7- days a week. Hoodoo is open 9am til 4pm, and Mt. Ashland is open. Check their Web sites for specific mountain conditions and hours of operation.
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ADVISORIES:
- A WINTER WEATHER ADVISORY IS IN EFFECT FROM 4 PM TODAY UNTIL 4PM SUNDAY FOR THE NORTHERN BLUE MOUNTAINS OF OREGON AND THE NORTHWEST BLUE MOUNTAINS.
- A WINTER WEATHER ADVISORY IS IN EFFECT FROM 5 PM MST TODAY UNTIL 5 AM MST SUNDAY FOR MALHEUR COUNTY AND THE OREGON LOWER TREASURE VALLEY.
- A FREEZING FOG ADVISORY IS IN EFFECT UNTIL 11 AM TODAY FOR NORTH CENTRAL OREGON.
- AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL 4 AM TODAY FOR THE THE BENTON COUNTY LOWLANDS, THE LINN COUNTY LOWLANDS, THE LANE COUNTY LOWLANDS.
- AN AIR QUALITY ALERT IS IN EFFECT FROM 4 PM TODAY UNTIL 4 AM TODAY FOR LAKE COUNTY.
- AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL 4 AM TODAY FOR THE NORTH OREGON COAST RANGE LOWLANDS, THE CENTRAL OREGON COAST RANGE LOWLANDS, THE LOWER COLUMBIA RIVER, THE TUALATIN VALLEY, THE WEST CENTRAL WILLAMETTE VALLEY, THE EAST CENTRAL WILLAMETTE VALLEY, THE BENTON COUNTY LOWLANDS, THE LINN COUNTY LOWLANDS, THE CLACKAMAS COUNTY CASCADE FOOTHILLS, THE THE CASCADE FOOTHILLS OF MARION AND LINN COUNTIES, AND THE LANE COUNTY CASCADE FOOTHILLS.
- AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL 4 AM TODAY FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY AND JOSEPHINE COUNTY, JACKSON COUNTY.THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL, AND EASTERN LAKE COUNTY.
- AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL 5 PM MST TODAY IN THE VALLEYS FOR THE OREGON LOWER TREASURE VALLEY.
- AN AIR QUALITY ALERT IS IN EFFECT UNTIL 4 AM TODAY FOR LAKE COUNTY.
- AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL 5 PM MST TODAY IN VALLEYS FOR HARNEY COUNTY, BAKER COUNTY. AND 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.
Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:
- Mostly cloudy and warmer with rain today (0.50 in. of rain possible), evening rain, showers likely (70%) late at night,
- Mostly cloudy with AM showers likely (70%), a bit cooler with a good (50%) chance of rain Sunday afternoon, partly cloudy with a slight (20%) chance of evening rain, mostly cloudy with patchy fog late at night,
- Mostly sunny and a bit cooler with patchy dense fog Monday, partly in the evening, then mostly cloudy late Monday night.
- highs 53-43 lows 38-30.
- AM clouds and sun, mostly cloudy Tuesday afternoon, mostly cloudy Tuesday night,
- AM clouds and sun with a good (50%) chance of rain, mostly cloudy and a bit warmer with a good (50%) chance of rain Wednesday afternoon, rain likely (70%) at night,
- Mostly cloudy and a bit cooler with rain likely (70%) Thursday, rain likely Thursday night,
- Then mostly cloudy and a bit cooler with rain Friday.
- highs 43-50 cooling to 48 Friday lows 34-40 cooling to 48 Friday. (seasonal averages high 48 low 35)
Your College Football Weather Forecast:
Big 1G Championship Game-Saturday December 7 th:
Ducks vs Penn State Nittany Lions at Lucas Oil Stadium, Indianapolis, Indiana- Game time: 5:00 pm PST- Preliminary weather Forecast: Clear to Clear to partly cloudy 38 degrees, and a bit breezy, cooling as the game continues.
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HOME WOOD HEATING ADVISORY:
Eugene & Springfield: YELLOW – Caution is advised, be prepared to stop burning wood if the advisory changes to Red.
Oakridge and Westfir: YELLOW – Caution is advised, be prepared to stop burning wood if the advisory changes to Red.
The use of pellet stoves is always allowed.
Data courtesy of Lane Regional Air Protection Agency (LRAPA.org)
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Forecast for the Umpqua Valley including Roseburg:
- Mostly cloudy and slightly cooler with rain today, evening rain likely (70%), a good (50%) chance of showers late tonight,
- Mostly cloudy and a bit cooler with a (30%) chance of showers Sunday afternoon, partly cloudy with a slight (20%) of evening showers, just partly cloudy late at night,
- highs 50-46 lows 39-32.
- Some AM clouds, sunny and a bit cooler Monday afternoon, partly cloudy Monday night,
- Partly cloudy and a bit warmer Tuesday, mostly cloudy with a slight (20%) chance of showers late at night,
- Mostly cloudy and a bit warmer with a slight (20%) of showers Wednesday, mostly cloudy with a (40%) chance of showers Wednesday night,
- Mostly cloudy with AM showers likely (70%), rain likely (70% ) Thursday afternoon, evening rain likely (70%), then just mostly cloudy late Thursday night and Friday.
- highs 49-52 lows 34-42. (seasonal averages high 48 low 37)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly cloudy with a slight (20%) chance of coastal rain with coastal rain tonight and coastal showers late tonight while mostly cloudy with a slight (20%) chance of inland rain late tonight,
- Mostly cloudy with a slight (20%) chance of showers and slightly cooler Saturday, evening rain likely (70%), a good (50%) chance of showers late Saturday night,
- Mostly cloudy with a slight (20%) chance of showers and a bit cooler Sunday, partly cloudy with a slight (20%) chance of evening showers, becoming mostly clear late at night,
- Sunny and a bit warmer Monday, then partly cloudy Monday night.
- highs 58-55 warming to 56 Monday lows 39-35.
- Partly cloudy and a bit warmer Tuesday, mostly cloudy with a slight (20%) chance of showers Tuesday night,
- Mostly cloudy and a bit warmer with a slight (20%) chance of showers Wednesday, mostly cloudy with showers likely (70%) at night,
- Mostly cloudy and a bit cooler with showers likely (70%) Thursday, evening rain likely (70%), just mostly cloudy late Thursday night,
- Then mostly cloudy and a bit warmer Friday.
- highs 56-58 cooling to 54 Thursday warming to 56 Friday lows 38-42 cooling to 40 Thursday night. (seasonal averages high 53 low 41)
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Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly cloudy and a bit cooler with rain today, rain and snow tonight,
- Mostly cloudy with a good (50%) chance of snow and rain showers and cooler Sunday, partly cloudy with a good (50%) chance of evening rain and snow showers snow, just partly cloudy late at night,
- Sunny and a bit warmer Monday, mostly clear Monday night.
- snow level above 8,000 ft. falling to 6,500 ft. this afternoon, 3,500 ft. tonight through Sunday night, free air freezing level 5,500 ft. Monday, 7,000 ft. Monday night.
- highs 45-32 warming to 36 Monday cooling to 42 Saturday lows 23-19 warming to 20 Monday.
- Mostly sunny and a bit warmer Tuesday, mostly cloudy with a slight (20%) chance of rain and snow Tuesday night,
- A mix of clouds and sun and a bit warmer with a slight (20%) chance of rain and snow Wednesday, mostly cloudy with rain and snow likely (70%) at night,
- Mostly cloudy and a bit cooler with rain and snow likely (70%) Thursday, rain and snow likely (70%) Thursday night,
- Then mostly cloudy and a bit cooler with snow and rain likely (70%) Friday.
- free air freezing level 11,000 ft. Tuesday, snow level 4,500 ft. Tuesday night, 5,000 ft. Wednesday, 5,500 ft. Wednesday night, 4,500 ft. Thursday, then 4,000 ft. Thursday night and Friday.
- highs 40-42 cooling to 35 Friday lows 20-27.