Feb
02.
Here is my weekly weather quiz question for the last time What is the “PDSI?” Here is the correct answer. PDSI is the Palmer Drought Severity Index – an index used to gage the severity of drought conditions by using a water balance equation to track water supply and demand. This index is calculated weekly by the National Weather Service.
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An Upper Level High Pressure Ridge (“Arch” shape) has been helping to pump unseasonably warm air over the Pacific Northwest, but that’s going to change. The graphics for days 1-3 show the complex frontal system that’s fell apart as it moved through Oregon. The graphics for days 3-7 Tuesday through Saturday show the frontal activity that could move into the Pacific Northwest.
Note: A check on the many groundhog predictions Friday shows they all predict an early Spring, But Spencer Butte Bob, My personal Groundhog, did see his shadow this morning (bright sunshine) in Eugene predicting six more weeks of winter. If today’s weather indicates what the rest of Winter will be like then I’ll take it.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 30 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 41 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 56 in the Moderate category measuring Particulate Matter.
Data courtesy of Lane Regional Air Protection Agency (LRAPA)
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ADVISORIES:
- A WINTER WEATHER ADVISORY IS IN EFFECT FROM 10 AM UNTIL 10 PM SUNDAY FOR CENTRAL AND EASTERN LAKE COUNTY.
- A WINTER WEATHER ADVISORY IS IN EFFECT FROM 10 AM UNTIL 10 PM SUNDAY FOR NORTHERN AND EASTERN KLAMATH COUNTY AND WESTERN LAKE COUNTY.
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:
- A mix of clouds and sun and a bit cooler today, partly cloudy with patchy fog tonight,
- Patchy AM fog, a mix of clouds and sun with a (40%) chance of rain and a bit cooler Sunday afternoon, mostly cloudy with a good (50%) chance of rain at night with patchy fog late,
- Patchy AM fog, mostly cloudy with a good (50%) chance of rain Monday, then a (40%) chance of evening rain with patchy fog late Monday night (under on10 in. of rain possible).
- highs 52-49 lows 32-39 cooling to 37 Monday night.
- Patchy AM fog, a mix of clouds and sun with a slight (20%) chance of rain Tuesday, partly cloudy with a slight (20%) chance of evening rain, mostly cloudy with a (40%) chance of rain with patchy fog late Tuesday night,
- Mostly cloudy and a bit cooler with a good (50%) chance of rain Wednesday, a good (50%) chance of rain at night,
- Mostly cloudy and a bit warmer with a good (50%) chance of rain Thursday, a good (50%) chance of rain Thursday night,
- Then mostly cloudy with a good (50%) chance of rain Friday.
- highs 49-47 warming to 48 Thursday and Friday lows near 36. (seasonal averages high 50 low 35)
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Home Wood Heating Advisory:
Eugene-Springfield: GREEN- Burning wood in wood stoves or fireplaces is allowed.
Oakridge: GREEN- Burning wood in wood stoves or fireplaces is allowed.
*Pellet stoves can be used anytime since they don’t produce the particulate smoke.
Data courtesy of Lane Regional Air Protection Agency (LRAPA)
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Forecast for the Umpqua Valley including Roseburg:
- Mostly cloudy today, partly cloudy this evening, mostly clear late tonight,
- Partly cloudy with a slight (20%) chance of AM rain and snow showers, mostly cloudy and a bit cooler with a good (50%) chance of showers Sunday afternoon (under 0.10 in. of rain possible, snow level 3,000 ft.), a good (50%) chance of showers at night (under 0.10 in. of rain possible),
- Then mostly cloudy with a good (50%) chance of AM rain and snow showers, a good (50%) chance of showers and a bit warmer Monday afternoon and evening, a (30%) chance of rain and snow showers late Monday night.
- highs 53-49 warming to 50 Monday lows 33-40.
- Mostly cloudy with a slight (20%) chance of rain and snow showers and a bit cooler Tuesday, a slight (20%) chance of rain and snow showers Tuesday night,
- Mostly cloudy and a bit cooler with a (40%) chance of rain and snow showers Wednesday, a (40%) chance of rain and snow showers at night,
- Then mostly cloudy and a bit warmer with a good (50%) chance of rain and snow showers Thursday through Friday.
- highs 49-52 lows 38-40. (seasonal averages high 52 low 37).
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly cloudy and a bit warmer with a slight (20%) chance of rain today (under 0.10 in. of rain possible), partly cloudy this evening, becoming mostly clear late tonight,
- Partly cloudy with a (30%) chance of AM showers, mostly cloudy with a (30%) chance of showers Sunday afternoon (under 0.10 in. of rain possible), mostly cloudy with a (40%) of coastal showers at night while a good (50%) chance of inland evening showers with inland showers likely (70%) late at night (0.10 in. of rain possible),
- Then mostly cloudy with AM showers likely (70%), a bit cooler with a good (50%) chance of showers Monday afternoon, a (30%) chance of showers Monday night.
- highs 55-53 lows 38-42 cooling to 40 Monday night.
- Mostly cloudy with a slight (20%) chance of showers Tuesday and Tuesday night,
- Mostly cloudy and a bit cooler with a (30%) chance of showers Wednesday, a (40%) chance of showers at night,
- Then mostly cloudy with a (40%) chance of showers Thursday and Thursday night,
- Then mostly cloudy and a bit warmer with a (40%) chance of showers Friday.
- highs 53-55 lows near 40. (seasonal averages high 54 low 41)
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Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Partly cloudy and a bit cooler today, mostly clear tonight,
- A mix of clouds and sun with a good (50%) chance of snow and a good (50%) chance of rain Sunday afternoon and breezy (Pass Wind: E 15-25 mph gusts to 45 mph), mostly cloudy with snow and rain likely (70%) at night,
- Mostly cloudy and a bit warmer with snow and rain likely (70%) Monday, then a good (50%) chance of rain and snow Monday night.
- snow level at the surface rising to 4,500 ft. this afternoon, 4,500 ft. falling to 3,500 ft. late tonight, 2,500 ft. rising to 3,500 ft. Sunday afternoon, then 3,500 ft. Sunday night through Monday night.
- highs near 35 lows 22-28 cooling to 24 Monday night.
- A mix of clouds and sun with a good (50%) chance of snow and rain and a bit cooler Tuesday, mostly cloudy with a good (50%) chance of snow and rain Tuesday night,
- Mostly cloudy and a bit cooler with a good (50%) chance of snow and rain Wednesday, mostly cloudy with a good (50%) chance of rain and snow at night,
- Mostly cloudy with a good (50%) chance of snow and rain and a bit warmer Thursday and Thursday night,
- Then snow and rain likely (70%) Friday.
- snow level 3,000 ft. Tuesday and Tuesday night, 2,500 ft. Wednesday through Thursday, then 3,000 ft. Thursday night and Friday.
- highs 34-32 warming to 33 Thursday and Friday lows 23-25.
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