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Advisories: A FREEZE WARNING IS IN EFFECT THROUGH THURSDAY FOR THE EAST SLOPES OF THE NORTHERN OREGON CASCADES.

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The upper level low (“U” shape sliding southward from British Columbia) is moving through the Pacific Northwest.  We’ll warm up a bit again through the weekend as a high pressure ridge (“Arch” shape in blue arrows west of oregon) starts to build in. Another upper level low will slide in behind the ridge early next week. A cold front will approach the Oregon coast Sunday morning bringing more clouds and cooler temperatures again.

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Forecast for the Umpqua Basin including Roseburg: Sunny today, mostly clear tonight, sunny Saturday, mostly clear Saturday evening, partly cloudy late Saturday night through Sunday evening, then mostly cloudy with a slight (20%) chance of showers Sunday night highs 82-86 cooling to 80 Sunday lows 50-54. Mostly cloudy Monday and Monday night, mostly cloudy with a slight (20%) chance of showers Tuesday AM, partly cloudy in the afternoon, mostly cloudy Tuesday night and Wednesday, then partly cloudy Wednesday night and Thursday highs 79-76 warming to near 80 Thursday lows 50-52. (seasonal averages high 84 low 55)

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Forecast for the South Oregon Coast including Coos Bay and North Bend: Clear with patchy coastal fog this AM, sunny this afternoon, clear tonight, mostly cloudy Saturday AM with coastal fog, sunny in the afternoon, mostly clear in the evening, partly cloudy Saturday night, mostly cloudy with a slight (20%) chance of coastal rain Sunday afternoon and Sunday night highs 62-66 lows near 52. Mostly cloudy with a slight (20%) chance of showers  Monday, mostly cloudy in the evening, partly cloudy Monday night, partly cloudy with a slight (20%) chance of showers Tuesday AM, mostly cloudy Tuesday afternoon through Wednesday, then partly cloudy Wednesday night and Thursday highs 65-60 warming to 64  Thursday lows 54-52. (seasonal averages high 66 low 53).

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Forecast for the Cascades of Lane County: Mostly sunny today, clear tonight, mostly sunny Saturday, mostly clear Saturday night, mostly sunny Sunday AM, then partly cloudy Sunday afternoon and Sunday night free air freezing level 14,000 ft. today through Saturday, 13,000 ft. Saturday night and Sunday, then 12,000 ft. Sunday night highs 72-76 cooling to near 70 Sunday lows 44-47 cooling to near 43 Sunday night. Partly cloudy Monday through Tuesday evening, mostly cloudy late Tuesday night and Wednesday AM, then partly cloudy Wednesday afternoon through Thursday free air freezing level 12,000 ft. Monday and Monday night, 11,000 ft. Tuesday, then 12,000 ft. Tuesday night through Thursday highs 67-69 lows near near 43.

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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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