An Upper Level Low Pressure Trough (“U” shape) over the Eastern Pacific keeps the onshore airflow over us holding the temperatures down to normal levels with shower chances. The graphics for days 1-3 show the frontal system that slid through the Pacific Northwest Wednesday. The graphics for days 3-7 Saturday through Wednesday show no frontal systems pushing into the Pacific Northwest through the period.
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ADVISORIES:
- NONE AT THIS TIME.
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 showers and a bit cooler with a slight (20%) chance of thunderstorms Friday and in the evening (0.10 in. of rain possible), rain late Friday night (under 0.10 in. of rain possible),
- Mostly cloudy with rain and a bit cooler Saturday (0.25 in. of rain possible), evening rain likely (70%), a (30%) chance of rain at night (under 0.10 in. of rain possible),
- AM clouds with a slight (20%) chance of showers, partly cloudy and warmer with a slight (20%) chance of showers Sunday afternoon, then becoming mostly clear Sunday night.
- lows 47-50 cooling to 48 Sunday night highs 62-60 warming to 74 Sunday.
- Sunny and warmer Monday, partly cloudy in the evening, mostly clear Monday night,
- Mostly sunny and a bit warmer Tuesday, mostly clear at night,
- Mostly sunny and a bit cooler Wednesday, partly cloudy Wednesday night,
- Then mostly sunny Thursday.
- highs 82-85 cooling to 80 Thursday lows near 52. (seasonal averages high 75 low 48).
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Forecast for the Umpqua Valley including Roseburg:
- Partly cloudy through late this evening, mostly cloudy with a slight (20%) chance of rain late tonight,
- Mostly cloudy with a showers and cooler with a slight (20%) chance of thunderstorms Friday (0.10 in. of rain possible)
and in the evening, rain likely (70%) late Friday night (0.10 in. of rain possible), - Mostly cloudy with rain Saturday (0.10 in. of rain possible), mostly cloudy with evening rain likely (70%), a slight (20%) chance of rain late at night (under 0.10 in. of rain possible),
- Mostly cloudy start, partly cloudy and warmer Sunday afternoon, then mostly clear and warmer Sunday night.
- lows 52-53 highs 59-76. .
- Mostly sunny and warmer Monday, partly cloudy in the evening, mostly clear late Monday night,
- Mostly sunny and a bit warmer Tuesday, mostly clear at night,
- Sunny Wednesday, partly cloudy Wednesday night,
- Then partly cloudy Thursday.
- highs 85-88 cooling to 85 Thursday lows 56-57 (seasonal averages high 77 low 53).
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Partly cloudy this evening, mostly cloudy with showers a slight (20%) chance of coastal late evening rain continuing through late tonight (under 0.10 in. of rain possible),
- Mostly cloudy and a bit cooler Friday with showers and a slight (20%) chance of afternoon thunderstorms while inland rain likely (70%) late Friday night (0.25 in. of rain possible),
- Mostly cloudy with rain Saturday, cloudy with evening coastal rain likely (70%) with a good (50%) chance of coastal rain late Saturday night while a good (50%) chance of inland rain at night,
- Cloudy with patchy AM fog and a slight (20%) chance of rain, just partly cloudy and warmer Sunday afternoon, mostly clear in the evening, partly cloudy Sunday night.
- lows 49-52 cooling back to 49 Sunday night highs 62-68.
- Partly cloudy and a bit warmer Monday, partly cloudy Monday night,
- Mostly cloudy start, sunny and a bit cooler Tuesday afternoon, partly cloudy in the evening, mostly cloudy with patchy fog late at night,
- Mostly cloudy start, sunny Wednesday afternoon, mostly cloudy Wednesday night,
- Then mostly cloudy Thursday.
- highs 672-69 lows 50-52.
- (seasonal averages high 64 low 52). _______________
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly cloudy with a slight (20%) chance of showers late tonight,
- Mostly cloudy with a good (50%) chance of AM rain showers and a slight (20%) chance of snow showers and thunderstorms, mostly cloudy and much cooler with rain showers and a slight (20%) snow showers Friday afternoon (0.50 in. of rain possible, AM snow possibly heavy at times, little or no snow accumulation possible), mostly cloudy with rain showers and a slight (20%) chance of snow showers and a slight (20%) chance of evening thunderstorms, rain and snow showers late Friday night (0.50 in. of rain possible, 1-3 in. of snow possible),
- Mostly cloudy with AM rain and snow showers, rain and a bit cooler Saturday, showers likely (70%) Saturday night,
- Mostly cloudy with a slight (20%) chance of AM showers, mostly cloudy and warmer with a slight (20%) chance of showers Sunday afternoon, then becoming mostly clear Sunday night.
- snow level 6,000 ft. tonight, 5,000 ft. Friday through Saturday, 6,500 ft. Saturday night, 7,500 ft. Sunday, then free air freezing level 10,000 ft. late Sunday night.
- lows 34-33 warming to 38 Sunday night highs 46-40 warming to 49 Sunday.
- Sunny and warmer Monday, partly cloudy Monday night,
- Sunny and a bit warmer Tuesday, mostly clear at night,
- Sunny Wednesday, partly cloudy at night,
- Then mostly sunny Thursday.
- free air freezing level 11,000 ft. Monday, 12,000 ft. Monday night and Tuesday, 13,000 ft. Tuesday night through Wednesday night, then 12,000 ft. Thursday.
- highs 70-74 cooling back to 70 Thursday lows 44-47 cooling to 45 Wednesday night.