Jan
09.
Here is my new weekly weather quiz question. What is an “Abutment?”
An Upper Level High Pressure Ridge (“Arch” shape) is tilting eastward and weakening allowing frontal movement into the Pacific Northwest. The graphics for days 1-3 show cold front sliding through Friday and Friday night. The graphics for days 3-7 Monday through Friday show the no frontal activity through the period until a cold front a cold front pushes into the Pacific Northwest next Friday.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 72 in the Moderate category measuring Particulate Matter.
Oakridge: The Air Quality Index is 86 in the Moderate category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 43 in the Good category measuring Particulate Matter.
Data courtesy of Lane Regional Air Protection Agency (LRAPA.org)
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ADVISORIES:
- A FREEZING FOG ADVISORY IS IN EFFECT UNTIL 10 AM FRIDAY FOR NORTH CENTRAL OREGON AND CENTRAL OREGON.
- AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL NOON FRIDAY FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL, AND EASTERN LAKE COUNTY.
- AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL NOON FRIDAY FOR THE EASTERN DOUGLAS COUNTY FOOTHILLS.
- A WINTER WEATHER ADVISORY IS ION EFFECT FROM 10 AM FRIDAY UNTIL 4 AM SATURDAY FOR THE NORTHERN BLUE MOUNTAINS OF OREGON.
- AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL NOON FRIDAY FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY AND JOSEPHINE COUNTY, AND JACKSON COUNTY.
- AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL 11 AM MST FRIDAY FOR HARNEY COUNTY, BAKER COUNTY, MALHEUR COUNTY, AND THE OREGON LOWER TREASURE VALLEY.
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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 with widespread dense fog and a slight (20%) of rain late tonight (under 0.10 in. of rain possible),
- Mostly cloudy with areas of AM fog and rain, a mix of clouds and sun and a good (50%) chance of showers and a bit warmer Friday afternoon (0.25 in. of rain possible), mostly cloudy with patchy fog and a good (50%) chance of showers Friday night (under 0.10 in. of rain possible),
- AM clouds and sun with patchy fog and a slight (20%) chance of showers, a mix of clouds and sun and a bit cooler with a slight (20% ) chance of showers Saturday afternoon, mostly cloudy with patchy fog and a slight (20%) chance of showers late Saturday night,
- Mostly cloudy with patchy fog and a slight (20%) chance of AM showers, a mix of clouds and sun with a slight (20%) Sunday afternoon, just partly cloudy Sunday night.
- lows 37-38 cooling to 32 Sunday night highs 52-47. .
- Mostly sunny and a bit cooler Monday, mostly clear in the evening, partly cloudy late Monday night,
- Sunny Tuesday, mostly clear at night,
- Sunny and a bit warmer Wednesday, mostly clear in the evening, partly cloudy late Wednesday night,
- Then mostly sunny and a bit warmer with a slight (20%) chance of rain Thursday.
- highs 44-46 lows near 30 (seasonal averages high 48 low 35)
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HOME WOOD HEATING ADVISORY:
Eugene & Springfield: YELLOW – Caution is advised. If the advisory increases to RED Wood burning would be prohibited.
Oakridge and Westfir: GREEN – The burning wood is allowed.
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:
- Partly cloudy with patchy dense fog through late evening, mostly cloudy with patchy dense fog and rain late tonight,
- Mostly cloudy with showers and warmer Friday, mostly cloudy with patchy fog and a slight (20%) chance of evening showers, just patchy fog late Friday night,
- Mostly cloudy with patchy AM fog, just mostly cloudy and a bit cooler Saturday afternoon, partly cloudy with patchy evening fog, mostly cloudy with areas of fog late at night,
- Mostly cloudy with patchy AM fog, partly cloudy Sunday afternoon, partly cloudy with patchy evening freezing fog, and areas of fog and freezing fog late Sunday night.
- lows 37-39 cooling to 33 Sunday night highs 52-47.
- Partly cloudy with patchy AM fog and freezing fog, sunny and a bit cooler Monday afternoon, mostly clear with patchy evening fog and freezing fog, areas of fog and freezing fog Monday night.
- Mostly sunny with patchy AM fog and freezing fog, sunny and a bit warmer Tuesday afternoon, mostly clear with areas of freezing fog at night,
- Sunny with areas of AM fog and freezing fog, sunny and a bit cooler Wednesday afternoon, mostly clear with patchy fog evening freezing fog, mostly clear with patchy fog and freezing fog late Wednesday night,
- Patchy AM freezing fog, then partly cloudy and a bit warmer Thursday afternoon.
- highs 45-49 cooling 47 Wednesday warming to 50 Thursday lows near 32. (seasonal averages high 50 low 37)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Partly cloudy through late evening, cloudy with rain late tonight,
- Mostly cloudy with AM rain, a good (50%) of coastal rain and cooler Friday afternoon while mostly cloudy with inland showers likely (70%) and a bit cooler Friday afternoon, just mostly cloudy Friday night,
- Partly cloudy Saturday, partly cloudy Saturday night,
- Partly cloudy Sunday, then mostly clear Sunday night.
- lows 38-40 cooling to 35 Sunday night highs near 53.
- Mostly sunny and a bit cooler Monday, mostly clear Monday night,
- Mostly sunny and a bit warmer Tuesday, mostly clear both nights,
- Sunny Wednesday, mostly clear Wednesday night,
- Then partly cloudy and a bit warmer Thursday.
- highs 52-54 lows near 36 (seasonal averages high 53 low 41)
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Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Partly cloudy this evening, mostly cloudy late tonight,
- Mostly cloudy with patchy dense AM fog and rain and snow, rain and snow showers likely (70%) and a bit warmer Friday afternoon (0.50 in. of rain possible, 1-4 in. of snow possible ), mostly cloudy with a good (50%) chance of evening rain and with snow showers likely (70%) late Friday night (0.10 in. of rain possible, 2 in. of snow possible),
- A mix of clouds and sun with dense AM fog with a good (50%) chance of snow showers, a slight (20%) chance of snow showers and cooler Saturday afternoon, then mostly cloudy with a slight (20%) chance of snow showers Saturday night,
- A mix of clouds and sun and a bit warmer with patchy dense fog with a slight (20%) chance of snow showers Sunday, partly cloudy in the evening, then becoming mostly clear Sunday night.
- free air freezing level 12,000 ft. tonight, snow level 6,000 ft. falling to 5,000 ft. Friday afternoon, 2,500 ft. Friday night, 2,500 ft. Saturday through Sunday, 4,500 ft. Sunday night.
- low 32-18 highs 39-29 warming to 32 Sunday.
- Sunny and a bit warmer Monday, mostly clear Monday night,
- Sunny and a bit warmer Tuesday, mostly clear at night,
- Sunny and a bit warmer Wednesday, mostly clear Wednesday night,
- Mostly cloudy with a slight (20%) chance of rain and snow Thursday.
- free air freezing level 4,000 ft. Monday, 7,500 ft. Monday night, 9,000 ft. Tuesday, 8,000 ft. Tuesday night, 10,000 ft. Wednesday, 7,500 ft. Wednesday night, then snow level 4,000 ft. Thursday.
- highs 33-39 lows 19-22.