Feb
03.
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 moving through Oregon Monday. The graphics for days 3-7 Tuesday through Saturday show complex frontal systems approaching 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 Friday morning (sunshine and clouds) in Eugene predicting six more weeks of winter. If our current 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 17 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 23 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 30 in the Good 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 ABOVE 3,500 FT. FOR NORTHERN AND EASTERN KLAMATH COUNTY AND WESTERN, CENTRAL, AND EASTERN LAKE COUNTY.
- A WIND ADVISORY IS IN EFFECT FROM 10 AM SUNDAY UNTIL 7 AM MONDAY FOR JACKSON 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:
- Mostly clear with patchy fog tonight,
- Patchy AM fog, a mix of clouds and sun with a good (50%) chance of rain and a bit cooler Sunday afternoon (under 0.10 in. of rain possible), cloudy with a good (50%) chance of evening rain, showers likely (70%) Sunday night with patchy fog late (0.10 in. of rain possible),
- Mostly cloudy with patchy AM fog and showers likely (70%), a good (50%) chance of showers Monday afternoon (0.10 in. of rain possible), mostly cloudy with a good (50%) chance of showers with patchy fog late at night (under o.10 in. of rain possible),
- Patchy AM fog, mostly cloudy with a (40%) chance of showers Tuesday, then mostly cloudy with a good (50%) chance of rain with patchy fog late Tuesday night,
- lows 30-39 cooling to 36 Tuesday night highs near 49.
- Mostly cloudy with a good (50%) chance of AM rain, a bit cooler with a good (50%) chance of showers Wednesday afternoon, a good (50%) chance of showers Wednesday night,
- Mostly cloudy with a good (50%) chance of AM showers, a bit cooler with showers likely (70%) Thursday afternoon, showers likely (70%) at night,
- Mostly cloudy with AM showers likely (70%), a good (50%) chance of showers and a bit warmer Friday afternoon and evening, showers likely (70%) with patchy fog late Friday night,
- Then mostly cloudy and a bit warmer with showers likely (70%) Saturday.
- highs 47-45 warming to 49 Saturday lows 33-35. (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 clear tonight,
- Mostly cloudy and cooler with a good (50%) chance of rain and snow Sunday (under 0.10 in. of rain possible, snow level 1,500 ft. rising to 3,000 ft.), a (0%) chance of evening rain, showers likely (70%) late Sunday night (under 0.10 in. of rain possible),
- Mostly cloudy with showers likely (70%) and a bit warmer Monday (0.10 in. of rain possible, snow level 3,500 ft.), a (40%) chance of evening showers, a (40%) chance of rain and snow showers late at night (under 0.10 in. of rain possible),
- Then mostly cloudy with a slight (20%) chance of rain and snow showers and a bit cooler Tuesday and Tuesday night.
- lows 32-40 highs 46-50 cooling to 48 Tuesday.
- Mostly cloudy with a (40%) chance of rain and snow showers Wednesday, a (40%) chance of rain and snow showers Wednesday night,
- Mostly cloudy with a good (50%) chance of AM rain and snow showers, a rain and snow showers Thursday afternoon, rain and snow showers likely (70%) Thursday night,
- Mostly cloudy and a bit warmer with rain and snow showers likely (70%) Friday and Friday night,
- Then mostly cloudy and a bit warmer with rain and snow showers likely (70%) Saturday.
- highs 48-50 lows 37-35 warming back to 37 Friday night (seasonal averages high 52 low 37).
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Partly cloudy this evening with patchy inland fog, becoming mostly clear with patchy fog late tonight,
- Mostly cloudy with a (40%) chance of coastal rain and a bit cooler Sunday while a (40%) chance of inland AM rain and inland rain likely (70%) and a bit cooler Sunday afternoon (under 0.10 in. of rain possible, AM snow level 2,000 ft.), a good (50%) of evening coastal rain while inland evening rain likely (70%), showers likely (70%) Sunday night (0.10 in. of rain possible),
- Mostly cloudy with showers likely (70%) Monday (0.10 in. of rain possible), a (40%) chance of showers at night (under 0.10 in. of rain possible),
- Then mostly cloudy with a (30%) chance of showers Tuesday and Tuesday night.
- lows 38-42 cooling to 40 Monday night highs near 53.
- Mostly cloudy with a (40%) chance of showers Wednesday and Wednesday night,
- Mostly cloudy with showers likely (70%) Thursday and at night,
- Mostly cloudy and a bit warmer with showers likely (70%) Friday, showers likely (70%) Friday night,
- Then mostly cloudy with showers likely (70%) Saturday.
- highs near 53 lows near 39. (seasonal averages high 54 low 41)
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Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly clear tonight,
- Mostly cloudy with a good (50%) chance of AM snow and a good (50%) chance of rain and a bit cooler Sunday afternoon (0.10 in. of rain possible, 1 in. of snow possible) and windy (Pass Wind: E 20-30 mph gusts to 50 mph), mostly cloudy with snow and rain Sunday night (0.25 in. of rain possible, 2 in. of snow possible) and breezy (Pass Wind: E 15-25 mph gusts to 45 mph),
- Mostly cloudy and a bit warmer with showers likely (70%) and snow showers Monday, a good (50%) chance of rain and snow at night,
- A mix of clouds and sun with a good (50%) chance of snow and rain showers and a bit cooler Tuesday, then mostly cloudy with a good (50%) chance of snow and rain Tuesday night.
- snow level 4,500 ft. falling to 3,500 ft. late tonight, 2,500 ft. Sunday, 4,000 ft. Sunday night and Monday, then 3,000 ft. Monday night through Tuesday night.
- lows 22-28 cooling to 23 Tuesday night highs 33-36 cooling to 34 Monday.
- Mostly cloudy with a good (50%) chance of AM snow, a bit cooler with a good (50%) chance of snow and rain showers Wednesday afternoon, mostly cloudy with a good (50%) chance of snow and rain showers Wednesday night,
- Mostly cloudy with a good (50%) chance of AM snow and rain showers, a bit cooler with snow and rain showers Thursday afternoon, snow and rain showers likely (70%) at night,
- Mostly cloudy with snow and rain showers likely (70%) Friday and Friday night,
- Then mostly cloudy and a bit warmer with rain and snow showers likely (70%) Saturday.
- snow level 2,500 ft. Wednesday through Thursday, 3,000 ft. Thursday night and Friday, 3,500 ft. Friday night, then 4,000 ft. Saturday.
- highs 30-34 lows near 22.
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