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Advisories: AN EXCESSIVE HEAT WATCH IS IN EFFECT FROM SATURDAY AFTERNOON THROUGH SATURDAY EVENING FOR THE COAST RANGE OF NORTHWEST OREGON, THE CENTRAL COAST RANGE OF WESTERN OREGON, THE I-5 CORRIDOR FROM PORTLAND THROUGH EUGENE/SPRINGFIELD, THE WESTERN COLUMBIA RIVER GORGE, THE NORTH OREGON CASCADE FOOTHILLS, THE CASCADE FOOTHILLS IN LANE COUNTY, AND THE UPPER HOOD RIVER VALLEY.
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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis: Mostly clear this evening, mostly cloudy tonight and Friday AM, mostly sunny and warmer Friday afternoon, clear Friday night, sunny and hot Saturday, mostly clear Saturday night, then partly cloudy Sunday and Sunday night lows 52-58 highs 89-95 cooling to 88 Sunday. Partly cloudy Monday AM, mostly sunny Monday afternoon, mostly clear in the evening, mostly cloudy and cooler Monday night, a mix of clouds and sun Tuesday, partly cloudy in the evening, mostly cloudy Tuesday night and Wednesday AM, partly cloudy Wednesday afternoon and evening, mostly cloudy Wednesday night and Thursday AM, then mostly sunny Thursday afternoon highs 87-80 warming to 83 Thursday lows 55-50. (seasonal averages high 84 low 52)
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Forecast for the Umpqua Basin including Roseburg: Clear this evening, partly cloudy with patchy fog late tonight and Friday AM, sunny in the afternoon, clear with patchy fog late Friday night and mostly cloudy with patchy fog Saturday AM, sunny in the afternoon, partly cloudy with a slight (20%) chance of thunderstorms Saturday night through Sunday evening, then partly cloudy late Sunday night lows 56-65 cooling to 58 Sunday night highs 90-98 cooling to near 90 Sunday. Partly cloudy Monday and Monday night, mostly cloudy Tuesday and Tuesday night, partly cloudy Wednesday, then mostly cloudy Wednesday night and Thursday highs 87-80 lows 56-54. (seasonal averages high 86 low 57)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly clear this evening, mostly cloudy with patchy fog and a slight (20%) chance of coastal drizzle late tonight and Friday AM, mostly sunny Friday afternoon, mostly clear with patchy fog and a slight (20%) chance of coastal drizzle again late Friday night and Saturday AM, mostly sunny in the afternoon, mostly cloudy with a slight (20%) chance of inland thunderstorms Saturday night, a slight (20%) chance of thunderstorms Sunday and Sunday night lows 56-54 highs 66-74 cooling to 54 Sunday night. Mostly cloudy Monday through Thursday afternoon highs 63-65 lows near 55. (seasonal averages high 65 low 53).
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Forecast for the Cascades of Lane County: Mostly clear tonight, sunny and warmer Friday, clear Friday night, sunny and warmer Saturday, partly cloudy with a slight (20%) chance of thunderstorms late Saturday night, a mix of clouds and sun with a slight (20%) chance of thunderstorm Sunday afternoon and evening, then just partly cloudy Sunday night free air freezing level 14,000 ft. tonight, 16,000 ft. Friday through Saturday, 15,000 ft. Saturday night and Sunday, then 14,000 ft. Sunday night lows 44-54 cooling to 48 Sunday night highs 80-85 cooling to near 80 Sunday. Partly cloudy Monday through Wednesday night, then a mix of clouds and sun Thursday AM and mostly sunny in the afternoon free air freezing level 14,000 ft. Monday through Thursday highs 78-70 warming to 74 Thursday lows 48-45.
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**Because weather forecasting is a combination of science, intuition, and timing there can be no absolute guarantees that individual forecasts will be 100% accurate. Nature is in a constant state of flux and sudden unexpected weather events can happen.
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