January 31, 2023
Note: Weather is a constantly changing phenomenon and weather forecasting is a combination of science, experience, and intuition. The accuracy of any given forecast can chance due to unexpected changes in atmospheric conditions, so there are no guarantees the the actual weather will conform to the projected forecast.
ADVISORIES
- A WIND ADVISORY IS IN EFFECT UNTIL 4 AM THURSDAY FOR THE GRANDE RONDE VALLEY.
- AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL 1 PM MST (MOUNTAIN STANDARD TIME) FRIDAY FOR HARNEY COUNTY, BAKER COUNTY, MALHEUR COUNTY, AND THE OREGON LOWER TREASURE VALLEY.
HEALTH ADVISORIES
A PERMANENT RECREATIONAL HEALTH ADVISORY IS IN EFFECT FOR THE SOUTH UMPQUA RIVER AND MAINSTEM UMPQUA RIVER. THE ADVISORY COVERS THE SOUTH UMPQUA RIVER FROM CANYONVILLE DOWNSTREAM TO THE CONFLUENCE OF THE MAINSTEM UMPQUA RIVER, AND THE MAINSTEM UMPQUA RIVER DOWNSTREAM PAST ELKTON TO LAWSON BAR. PEOPLE IN THE BEDROCK ALONG THE RIVERS EDGE ARE ARE KNOWN TO DEVELOP CYANOBACTERIA (BLUE-GREEN ALGAE) BLOOMS THAT CAN BE HARMFUL TO PETS AND PEOPLE IF ACCIDENTAL INGESTION OCCURS. SIGNS HAVE BEEN POSTED AT SEVERAL ACCESS AREAS ALONG THE RIVER.
THE WEATHER PATTERN
A very strong Jet Stream flow www.wunderground.com/maps/wind/jet-stream from the northeast and sent much cooler air to the Pacific Northwest. A strong cold front www.wpc.ncep.noaa.gov pushed through the Pacific Northwest from the northeast (called a backdoor cold front) bringing colder air with it. It will take a while for temperatures to warm back up again. There will be frontal activity returning by the end of the week, but not of the bitter cold airflow nature.
Forecast for the South Willamette Valley including Eugene-Springfield:
- Partly cloudy this evening, becoming mostly cloudy late tonight,
- A mix of clouds and sun and a bit warmer Wednesday, becoming mostly cloudy Wednesday night,
- Cloudy and a bit warmer with a (40%) chance of rain Thursday afternoon, rain at night (under 0.10 in. of rain possible),
- Mostly cloudy and a bit warmer with rain Friday, then cloudy with a good (50%) chance of rain Friday night.
- lows 28-39 highs 45-50.
- Cloudy with a good (50%) chance of AM rain, a bit warmer with rain likely (70%) Saturday afternoon, rain Saturday night,
- Mostly cloudy and a bit cooler with rain Sunday, a good (50%) chance of rain at night,
- Cloudy and a bit warmer with a slight (20%) chance of rain Monday, mostly cloudy with a slight (20%) chance of rain Monday night,
- Then cloudy with a (40%) chance of rain and a bit warmer Tuesday.
- highs 52-47 warming to 50 Tuesday lows 40-37. (seasonal averages high 50 low 35)
Forecast for the Umpqua Valley including Roseburg:
- Mostly cloudy tonight,
- Mostly cloudy and a bit warmer Wednesday, partly cloudy in the evening, mostly cloudy late Wednesday night,
- Cloudy and a bit cooler with a slight (20%) chance of rain Thursday (afternoon snow level 3,000 ft.), rain likely (70%) at night (under 0.10 in. of rain possible, snow level 3,500 ft.),
- Mostly cloudy with AM rain likely (70%), a good (50%) chance of rain Friday afternoon, then mostly cloudy with a slight (20%) chance of rain Friday night.
- lows 32-40 cooling to 38 Friday night highs 55-52.
- Cloudy with a (30%) chance of rain Saturday, showers Saturday night,
- Mostly cloudy with showers and a bit cooler Sunday, a good (50%) chance of showers at night,
- Then mostly cloudy and a bit warmer with a slight (20%) chance of showers Monday and Tuesday, a slight (20%) chance of rain late Monday night.
- highs 52-47 warming back to 52 Tuesday lows 42-35. (seasonal averages high 52 low 37)
Forecast for the Oregon Coast including Coos Bay and North Bend:
- Mostly cloudy tonight,
- Mostly cloudy and slightly warmer Wednesday, partly cloudy in the evening, mostly cloudy late Wednesday night,
- Cloudy with a (40%) chance of coastal rain and a bit warmer Thursday while a (40%) chance of AM inland rain with inland rain Thursday afternoon (under 0.10 in. of rain possible), breezy (Wind: SE 15-25 mph), rain Thursday night (0.25 in. of rain possible) breezy (Wind: S 20-30 mph gusts to 45 mph),
- Mostly cloudy with AM rain, a bit cooler with rain likely (70%) Friday afternoon, then a good (50%) chance of rain Friday night.
- lows 32-42 highs 54-56 cooling back to 54 Friday.
- Mostly cloudy with a good (50%) chance of rain and a bit warmer Saturday, showers Saturday night,
- Mostly cloudy and a bit cooler with showers Sunday, a good (50%) chance of rain at night,
- Mostly cloudy with a slight (20%) chance of showers Monday, a slight (20%) chance of rain late Monday night,
- Then mostly cloudy and a bit warmer with a (30%) chance of rain Tuesday.
- highs 55-52 warming to 54 Tuesday lows 42-37. (seasonal averages high 54 low 41)
Forecast for the Northern Oregon Cascades including Willamette Pass:
- Becoming mostly cloudy late tonight,
- A mix of clouds and sun and a bit warmer Wednesday, partly cloudy Wednesday night,
- Mostly cloudy with a (30%) chance of rain and snow and a bit cooler Thursday afternoon, good (50%) chance of evening rain and snow, rain and snow likely (70%) late Thursday night (1-3 in. of snow possible),
- Mostly cloudy and a bit cooler with a rain and snow likely (70%) Friday and breezy (1-4 in. of snow possible), mostly cloudy with a (40%) chance of rain and snow at night.
- free air freezing level 6,500 ft. tonight and Wednesday, 7,000 ft. Wednesday night, snow level 4,500 ft. Thursday, 4,000 ft. Thursday night, 3,500 ft. Friday, then 4,000 ft. Friday night.
- lows 22-29 cooling to 25 Friday night highs 44-35.
- Mostly cloudy and a bit warmer with a good (50%) chance of rain and snow Saturday, rain and snow Saturday night,
- Mostly cloudy and a bit cooler with rain and snow Sunday, rain and snow likely (70%) at night,
- Mostly cloudy with a good (50%) chance of rain and snow Monday, a slight (20%) chance of rain and snow Monday night,
- Then mostly cloudy and a bit warmer with a (30%) chance of rain and snow Tuesday.
- snow level 4,000 ft. Saturday, 5,000 ft. Saturday night, 4,000 ft. Sunday and Sunday night, 3,000 ft. Monday, 3,500 ft. Monday night, then 4,000 ft. Tuesday.
- highs 37-34 warming to 38 Tuesday lows 28-23.
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- For all of your Eugene-Springfield and Lane County News, Weather, and Sports go to: EugeneDailyNews.com
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10/31 Showers with patchy fog overnight.
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- 11/1 Cold front drops temperatures & brings more rain/possible t’storms today.
- 10/31 Showers with patchy fog overnight.
- 10/31 Rain for Halloween today. Dress “Trick-Or-Treaters”for wet weather today and this evening.
- 10/30 A slight chance of evening rain changing to a 50% chance late tonight.
- 10/30 AM fog, a slight chance of rain today for your Sunday.
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- For all of your Eugene-Springfield and Lane County News, Weather, and Sports go to: EugeneDailyNews.com
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Mostly clear again tonight, then sunshine and slightly cooler for your Friday.
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- 7/15 Plenty of sunshine heading our way today to end the workweek.
- Mostly clear again tonight, then sunshine and slightly cooler for your Friday.
- 7/14 Sunshine and a bit warmer for your Thursday.
- Clear overnight, sunny and pleasant tomorrow for your Thursday.
- 7/13 A break from the heat today for your “Hump Day.”
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Forecast for the Oregon Coast including Coos Bay and North Bend:
- Becoming mostly cloudy late tonight,
- Some AM clouds, sunny and a bit warmer Friday afternoon, clear in the evening, partly cloudy late Friday night,
- Mostly cloudy start, partly cloudy and slightly cooler Saturday afternoon, mostly clear at night,
- Mostly sunny Sunday, then mostly clear Sunday night.
- lows 54-56 cooling back to 54 Sunday night highs 70-69.
- Mostly sunny and a bit warmer Monday, mostly clear Monday night,
- Partly cloudy and slightly cooler Tuesday, partly cloudy at night,
- Then partly cloudy Wednesday through Thursday.
- highs 73-72 lows 54-56 cooling back to 54 Wednesday night. (Seasonal Averages high 66 low 54)
Forecast for the Northern Oregon Cascades including Willamette Pass:
- Mostly clear tonight,
- Mostly sunny and a bit cooler Friday, clear Friday night,
- Sunny and a bit warmer Saturday, mostly clear at night,
- Some AM clouds, mostly sunny and a bit cooler Sunday, then clear Sunday night.
- free air freezing level 15,000 ft. falling to 14,000 ft. late tonight, 14,000 ft. rising to 15,000 ft. Friday afternoon, 15,000 ft. Friday night through Sunday, then 16,000 ft. Sunday night.
- lows 49-47 highs 74-72 warming back to 74 Sunday.
- Sunny and a bit warmer Monday, clear Monday night,
- Sunny Tuesday, mostly clear at night,
- Then mostly sunny and a bit cooler Wednesday and Thursday, mostly clear Wednesday night.
- free air freezing level 16,000 ft. Monday through Thursday.
- highs 80-75 lows 53-50.