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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 AND WEST TO FLORENCE AND SOUTH TO COTTAGE GROVE, 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: Partly cloudy this AM, sunny and warmer this afternoon, clear tonight, sunny and hot 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 thunderstorms and a bit cooler Sunday, partly cloudy with a slight (20%) chance of thunderstorms Sunday night highs 89-98 cooling to near 88 Sunday lows 56-58. A mix of clouds and sun Monday AM, mostly sunny in the afternoon, mostly clear in the evening, mostly cloudy at 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: Partly cloudy with patchy fog this AM, sunny this afternoon, clear with patchy fog late tonight 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 highs 90-99 cooling to near 90 Sunday lows 58-65 cooling to 58 Sunday night. 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 warming to 83 Thursday 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 cloudy with patchy fog and a slight (20%) chance of coastal drizzle this AM, mostly sunny this afternoon, mostly clear with patchy fog and a slight (20%) chance of coastal drizzle again late tonight 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 highs 68-74 cooling to 68 Sunday lows 56-59 cooling to 54 Sunday night. Mostly cloudy Monday through Thursday afternoon highs 63-67 lows near 55. (seasonal averages high 65 low 53).
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Forecast for the Cascades of Lane County: Sunny and warmer today, clear tonight, 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. today, 16,000 ft. tonight and Saturday, 15,000 ft. Saturday night and Sunday, then 14,000 ft. Sunday night highs 80-85 cooling to near 80 Sunday lows 53-48. 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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