Here is my weekly weather quiz question for the last time. What is a “Tail Cloud “? Here is the correct answer. A Tail Cloud is a horizontal, tail-shaped cloud (not a funnel cloud) at low levels extending from the precipitation cascade region of a supercell toward the wall cloud (i.e., it usually is observed extending from the wall cloud toward the north or northeast). The base of the tail cloud is about the same as that of the wall cloud. Cloud motion in the tail cloud is away from the precipitation and toward the wall cloud, with rapid upward motion often observed near the junction of the tail and wall clouds. Compare with beaver tail, which is a form of inflow band that normally attaches to the storm’s main updraft (not to the wall cloud) and has a base at about the same level as the updraft base (not the wall cloud).
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An Upper Level Low Pressure Trough (“U” shape) is slowly moving eastward encouraging frontal systems to come our way. The graphics for days 1-3 show the cold front approaching the Pacific Northwest Monday. The graphics for days 3-7 Wednesday through Sunday show complex frontal system sliding in Thursday and another coming Friday. Yet another front shows up Sunday.
ADVISORIES:
- A WINTER WEATHER ADVISORY IS IN EFFECT FROM 4 AM MONDAY UNTIL 10 AM TUESDAY ABOVE 5,000 FT. FOR THE SOUTH CENTRAL OREGON CASCADES, THE SISKIYOU MOUNTAINS, AND THE SOUTHERN OREGON CASCADES.
- A WIND ADVISORY IS IN EFFECT FROM 10 PM TONIGHT UNTIL 10 AM MONDAY FOR NORTHERN AND EASTERN KLAMATH COUNTY AND WESTERN, CENTRAL, AND EASTERN LAKE COUNTY.
- AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL 5 AM MST MONDAY FOR HARNEY COUNTY, BAKER COUNTY, MALHEUR COUNTY, AND THE OREGON LOWER TREASURE VALLEY.
- A HIGH SURF ADVISORY IS IN EFFECT FROM 10 PM MONDAY UNTIL 10 PM TUESDAY FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
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 with a slight (20%) chance of evening rain, rain late tonight (0.50 in. of rain possible),
- Mostly cloudy with morning rain and a slight (20%) chance of thunderstorms, showers (0.50 in. of rain possible, more in storms) and a slight (20%) chance of thunderstorms and a bit cooler Monday afternoon (Veterans day), showers with a slight (20%) chance of thunderstorms Monday night,
- Mostly cloudy with AM showers, rain Tuesday afternoon (under 0.10 in. of rain possible), rain at night (0.25 in. of rain possible),
- Mostly cloudy and a bit warmer with rain and a slight (20%) chance of thunderstorms Wednesday, then showers with a slight (20%) chance of thunderstorms Wednesday night.
- lows 47-44 warming back to 47 Tuesday night cooling to 45 Wednesday night highs 56-57.
- Mostly cloudy and a bit cooler with showers and a slight (20%) chance of thunderstorms Thursday, showers Thursday night,
- Mostly cloudy with showers and a bit cooler with Friday, a good (50%) chance of showers at night,
- A mix of clouds and sun with a good (50%) chance of showers Saturday, showers likely (70%) Saturday night,
- Then mostly cloudy with showers Sunday.
- highs 53-52 lows 37-35 warming back to 37 Saturday night. (seasonal averages high 55 low 38)
Your College Football Weather Forecast:
Saturday November 9th:
Ducks vs Maryland Terrapins, at Autzen Stadium, Game time: 4:00 pm- The Ducks beat The Maryland Terrapins 39-18.
Beavers vs San Jose State Spartans, at Reser Stadium: Game time 12:30 pm- The Beavers lost to The San Jose State Spartans 24-13.
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HOME WOOD HEATING ADVISORY:
Eugene & Springfield: GREEN – Fireplace and wood stove use permitted.
Oakridge and Westfir: GREEN – Fireplace and wood stove use permitted.
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 with a good (50%) chance of early evening rain , rain with a slight (20%) chance of thunderstorms late tonight (0.25 in. of rain possible),
- Mostly cloudy and a bit cooler with showers (0.25 in. of rain possible) and a slight (20%) chance of thunderstorms Monday (Veterans day), showers and a slight (20%) chance of thunderstorms Monday night (0.10 in. of rain possible),
- Mostly cloudy with showers and a bit cooler Tuesday, rain at night (0.10 in. of rain possible),
- Mostly cloudy with showers and a bit warmer with a slight (20%) chance of thunderstorms Wednesday and Wednesday night.
- lows 48-46 warming to 47 Tuesday night cooling to 46 Wednesday night highs 55-58 cooling to 53 Wednesday.
- Mostly cloudy and a bit warmer with showers Thursday and in the evening, showers likely (70%) Thursday night,
- Mostly cloudy with showers and a bit cooler Friday, a good (50%) of evening showers, a good (50%) chance of rain and snow showers late at night,
- Mostly cloudy with a good (50%) chance of AM rain and snow showers, a (30%) chance of showers Saturday afternoon and evening, showers late Saturday night,
- Then mostly cloudy and a bit cooler with showers Sunday.
- highs 54-50 lows 42-39. (seasonal averages high 56 low 41)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly cloudy and breezy (Wind: S 15-25 mph) with early evening coastal rain and coastal showers and a slight (20%) chance of thunderstorms late evening and tonight while inland evening rain and a slight (20%) chance of thunderstorms and inland showers with a slight (20%) chance of thunderstorms late tonight (0.50 in. of rain possible),
- Mostly cloudy and a bit warmer with showers (0.25 in. of rain possible) and a slight (20%) chance of thunderstorms Monday (Veterans day), showers and a slight (20%) chance of thunderstorms Monday night (0.25 in. of rain possible),
- Mostly cloudy with showers and breezy (Wind: S 15-25 mph) and a bit warmer Tuesday (under 0.10 in. of rain possible), evening coastal rain with coastal rain and a slight (20%) chance of thunderstorms late at night while inland rain and windy (Wind: S 25-35 mph decreasing to S 15-25 mph late while windy at the shore (Wind: S 25-35 mph) at night (0.50 in. of rain possible),
- Mostly cloudy and windy with showers and a slight (20%) chance of thunderstorms and a bit cooler Wednesday and Wednesday night.
- lows 49-52 cooling to 48 Wednesday night highs 58-63 cooling back to 58 Wednesday.
- Mostly cloudy with showers and a bit warmer Thursday, showers Thursday night,
- Mostly cloudy and a bit cooler with showers Friday, evening showers likely (70%), a good (50%) chance of rain late at night,
- Mostly cloudy with a good (50%) chance of showers Saturday, evening showers likely (70%), showers late Saturday night,
- Then showers and a bit warmer Sunday.
- highs 59-58 warming back to 59 Sunday lows 42-38 warming back to 42 Saturday night. (seasonal averages high 58 low 44)
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Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly cloudy with rain and a slight (20%) chance of snow late tonight (0.50 in. of rain possible, 1 in. of snow possible),
- Mostly cloudy with AM rain showers and snow showers likely (70%) (snow possibly heavy at times), rain showers and snow showers and a bit cooler Monday afternoon (Veterans day) (0.50 in. of rain possible, 2-5 in. of snow possible), evening showers with a slight (20%) chance of thunderstorms and snow showers, rain and snow showers late Monday night (0.50 in. of rain possible, 3-7 in. of snow possible),
- AM rain showers and snow showers, mostly cloudy and a bit cooler with rain Tuesday afternoon, snow and rain at night,
- Mostly cloudy with rain and snow Wednesday (snow possibly heavy at times), then rain showers and snow showers with a slight (20%) chance of thunderstorms Wednesday night.
- snow level 6,500 ft. tonight, 4,500 ft. Monday through Tuesday, 5,000 ft. Tuesday night, 6,000 ft. Wednesday, then 5,000 ft. Wednesday night.
- lows 34-30 warming to 32 Tuesday night highs 45-35.
- Mostly cloudy and a bit cooler with rain and snow showers Thursday, snow and rain showers Thursday night,
- Mostly cloudy and a bit cooler with snow and rain showers Friday, snow showers likely (70%) with a good (50%) chance of rain showers at night,
- A mix of clouds and sun with a good (50%) chance of AM rain and snow showers, mostly cloudy and a bit warmer with a good (50%) chance of snow and rain showers Saturday afternoon, snow and rain showers likely (70%) Saturday night,
- Mostly cloudy with snow and rain showers Sunday.
- snow level 4,500 ft. Thursday, 4,000 ft. Thursday night, 3,500 ft. Friday, 3,000 ft. Friday night and Saturday,then 4,500 ft. Saturday night and Sunday.
- highs 38-32 lows 32-23.