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 that moves through the Pacific Northwest today. The graphics for days 3-7 Wednesday through Sunday show complex frontal system sliding in Wednesday through Thursday and another coming Friday.
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.
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:
- Cloudy with a good (50%) chance of AM showers, a bit cooler with showers likely (70%) this afternoon (0.10 in. of rain possible), showers tonight (0.50 in. of rain possible),
- Mostly cloudy with showers 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 showers and a bit cooler Tuesday, then rain Tuesday night.
- highs 59-55 lows 47-45 warming back to 57 Tuesday night.
- Mostly cloudy and a bit warmer with rain Wednesday, rain with a slight (20%) chance of thunderstorms Wednesday night,
- Mostly cloudy and a bit cooler with rain Thursday, showers at night,
- Mostly cloudy with rain and a bit cooler with showers Friday, a good (50%) chance of showers Friday night,
- Then a mix of clouds and sun and a bit cooler with a (40%) chance of showers Saturday.
- highs 45-36 lows 45-36. (seasonal averages high 55 low 39)
Your College Football Weather Forecast:
Today 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 and a bit warmer with a (40%) chance of rain today, rain tonight,
- Mostly cloudy and a bit cooler with showers and a slight (20%) chance of thunderstorms Monday (Veterans day), showers and a slight (20%) chance of thunderstorms Monday night,
- Mostly cloudy with AM rain and a slight (20%) chance of thunderstorms, rain and a bit cooler Tuesday, evening rain, then rain late Tuesday night.
- highs 63-54 lows 49-46 warming to 48 Tuesday night.
- Mostly cloudy with rain and a bit warmer with a slight (20%) chance of thunderstorms Wednesday and Wednesday night,
- Mostly cloudy and a bit cooler with rain Thursday, rain at night,
- Mostly cloudy with rain and a bit cooler Friday, evening rain and snow likely (70%), a good (50%) chance of rain and snow late Friday night,
- Mostly cloudy with a good (50%) chance of AM rain and snow, then a (40%) chance of rain Saturday afternoon.
- highs 52-47 lows 45-40. (seasonal averages high 56 low 41)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly cloudy with AM coastal rain likely (70%) and coastal rain and a bit warmer this afternoon while inland rain likely (70%) and as bit warmer today (under 0.10 in. of rain possible), evening rain, showers and a slight (20%) chance of thunderstorms late tonight (1.00 in. of rain possible),
- Mostly cloudy and a bit cooler with showers and a slight (20%) chance of thunderstorms Monday (Veterans day), showers and a slight (20%) chance of thunderstorms at night,
- Mostly cloudy with rain and a slight (20%) chance of thunderstorms and a bit cooler Tuesday, rain and breezy Tuesday night.
- highs 65-57 lows 48-47 warming to 53 Tuesday night.
- Mostly cloudy and windy with showers and a slight (20%) chance of thunderstorms and a bit warmer Wednesday, windy with showers and a slight (20%) chance of thunderstorms Wednesday night,
- Mostly cloudy with rain and a bit cooler Thursday, rain with patchy fog late at night,
- Mostly cloudy and a bit cooler with rain Friday, evening rain likely (70%), a good (50%) chance of rain late Friday night,
- Then mostly cloudy with a good (50%) chance of rain Saturday.
- highs 59-53 lows 49-40. (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 a good (50%) chance of AM showers, showers likely (70%) and a bit cooler this afternoon (0.10 in. of rain possible), showers tonight (0.50 in. of rain possible),
- Mostly cloudy with AM rain showers and a slight (20%) chance of snow showers, rain showers and snow showers and a bit cooler Monday afternoon (Veterans day), snow showers at night (snow possibly heavy at times),
- Mostly cloudy and a bit cooler with rain and snow showers Tuesday, then rain and snow showers Tuesday night.
- snow level 7,500 ft., today, 7,000 ft. tonight, 4,500 ft. Monday and Monday night, 5,000 ft. Tuesday, then 6,000 ft. Tuesday night.
- highs 45-35 lows 34-30 warming to 32 Tuesday night.
- Mostly cloudy and a bit warmer with rain and snow Wednesday (snow possibly heavy at times), rain and snow Wednesday night,
- Mostly cloudy and a bit cooler with rain and snow Thursday, snow and rain showers at night,
- Mostly cloudy and a bit cooler with snow and rain showers Friday, a good (50%) chance of snow and rain showers Friday night,
- Then a mix of clouds and sun with a good (50%) chance of snow and rain showers Saturday.
- snow level 6,000 ft. Wednesday, 5,500 ft. Wednesday night, 5,000 ft. Thursday, 4,000 ft. Thursday night, 3,500 ft. Friday and Friday night, then 3,000 ft. Saturday.
- highs 38-32 lows 32-23.