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 High Pressure Ridge (“Arch” shape) is slowly moving eastward allowing frontal systems to bring rain. The graphics for days 1-3 show the cold front that moves through the Pacific Northwest tonight and Sunday. The graphics for days 3-7 Tuesday through Saturday show complex frontal system sliding in Wednesday through Thursday.
ADVISORIES:
- AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL 5 AM MST SUNDAY 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:
- Mostly cloudy with a slight (20%) chance of AM rain, mostly cloudy, possible sun breaks, rain likely (70%) and a bit cooler this afternoon (under 0.10 in. of rain possible), evening rain likely (70%) tonight (under 0.10 in. of rain possible),
- Mostly cloudy with a goods (50%) chance of AM rain, a bit warmer with rain likely (70%) Sunday afternoon (under 0.10 in. of rain possible), rain Sunday night (0.50 in. of rain possible),
- Mostly cloudy with rain and a slight (20%) chance of thunderstorms and a bit cooler Monday (Veterans day), then showers with a slight (20%) chance of thunderstorms Monday night.
- highs 60-62 lows 46-47 cooling to 45 Monday night.
- Mostly cloudy with rain Tuesday and Tuesday night,
- Mostly cloudy and a bit warmer with rain Wednesday and Wednesday night,
- Mostly cloudy with rain and a bit cooler Thursday and Thursday night,
- Then mostly cloudy with rain likely (70%) Friday.
- highs 55-57 cooling to 52 Friday lows 47-40. (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- Weather forecast: Mostly cloudy 58 degrees rain likely, warming to 60 then cooling as the game progresses. Be prepared for the possibility of getting wet.
Beavers vs San Jose State Spartans, at Reser Stadium: Game time 12:30 pm- Mostly cloudy 55 degrees becoming rain likely, warming to 59 as the game progresses. Be prepared for the possibility of getting wet.
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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:
- Patchy AM fog, mostly cloudy with (30%) chance of rain this afternoon (under 0.10 in. of rain possible), mostly cloudy with a (30%) chance of rain tonight (under 0.10 in. of rain possible),
- Mostly cloudy and a bit warmer with a (30%) chance of rain Sunday, evening rain, showers with a slight (20%) chance of thunderstorms late Sunday night,
- Mostly cloudy and a bit cooler with showers and a slight (20%) chance of thunderstorms Monday (Veterans day), then showers and a slight (20%) chance of thunderstorms Monday night.
- highs 63-64 cooling to 56 Monday lows 46-49 cooling back to 46 Monday night.
- Mostly cloudy with showers and a bit cooler Tuesday, rain Tuesday night,
- Mostly cloudy with rain and a bit warmer Wednesday, rain at night,
- Mostly cloudy and a bit cooler with rain Thursday, rain and patchy fog Thursday night,
- Patchy AM fog, then rain and a bit cooler Friday night.
- highs 55-58 cooling to 53 Friday lows 48-42. (seasonal averages high 56 low 42)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly cloudy with a (40%) chance of AM coastal rain and a bit warmer this afternoon while a (30%) chance of inland rain this afternoon (under 0.10 in. of rain possible), evening coastal rain while inland evening rain likely (70%), a good (50%) chance of rain late tonight (under 0.10 in. of rain possible),
- Mostly cloudy with a good (50%) chance of AM coastal rain while inland AM rain likely (70%), rain Sunday afternoon (under 0.10 in. of rain possible), evening rain , showers and a slight (20%) chance of thunderstorms late Sunday night (1.00 in. of rain possible), breezy (Wind: S 15-25 mph gusts to 40 mph in the evening continuing overnight),
- 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.
- highs 65-62 lows 47-48 cooling to 46 Monday night.
- Mostly cloudy with showers Tuesday, rain Tuesday night,
- Mostly cloudy with rain and a bit warmer Wednesday, rain at night,
- Mostly cloudy with rain and a bit cooler Thursday, rain with patchy fog late Thursday night,
- Patchy AM fog, then mostly cloudy and a bit cooler with rain Friday afternoon.
- highs 62-64 cooling to 59 Friday lows 49-43. (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 likely (70%) cooler this afternoon (under 0.10 in. of rain possible), evening snow likely (70%), rain likely (70%) late tonight,
- Mostly cloudy with a good (50%) chance of AM rain, rain likely (70%) and a bit cooler Sunday afternoon, rain Sunday night,
- Mostly cloudy and cooler with rain and snow (snow possibly heavy at times) Monday (Veterans day), rain and snow with a slight (20%) chance of thunderstorms Monday night (snow possibly heavy at times).
- snow level 6,000 ft. today and tonight, 7,000 ft., Sunday and Sunday night, 5,o00 ft. Monday, then 4,500 ft. Monday night,
- highs 48-35 lows 35-30.
- Mostly cloudy and a bit cooler with rain and snow Tuesday (snow possibly heavy at times), rain with a slight (20%) chance of snow Tuesday night,
- Mostly cloudy and a bit warmer with rain and a slight (20%) chance of snow Wednesday (snow possibly heavy at times), rain and and a slight (20%) chance of snow at night,
- Mostly cloudy and a bit cooler with rain and snow Thursday, rain and snow Thursday night,
- Then mostly cloudy and a bit cooler with snow and rain Friday.
- snow level 4,500 ft. Tuesday, 6,000 ft. Tuesday night, 6,500 ft. Wednesday, 6,000 ft. Wednesday night, 5,000 ft. Thursday, 4,500 ft. Thursday night, then 4,000 ft. Friday.
- highs 34-37 Wednesday cooling to 32 Friday lows 32-27.