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An upper level low pressure trough (the  “U” shaped dip in the yellow jet stream line) is starting to move eastward over the Pacific Northwest.  High pressure aloft (the “arch” shaped yellow line) and a surface high pressure center over the Eastern Pacific (represented by the blue “H”) will build in it early next week keeping much needed rain away from us.

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Advisories: NONE AT THIS TIME.

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The summer Pollen Count Forecast season for the Eugene-Springfield area is over. From Allergy and Asthma Research Group.

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Here are your detailed forecasts. **

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Forecast for the Southern and lower Mid Willamette  Valley including Eugene-Springfield and Albany-Corvallis:  Mostly cloudy this AM, a mix of clouds and sun in the afternoon, and partly cloudy tonight high 77 low near 50.  AM clouds then a mix of clouds and sun a bit warmer Monday, partly cloudy Monday night and Tuesday night, then a mix of clouds and sun Tuesday and Wednesday highs 85-83-87 lows again near 50-52. Mostly clear evenings and mostly cloudy nights Wednesday night through Friday night, and AM clouds followed by mostly sunny Thursday and Friday, AM clouds then a mix of clouds and sun Saturday lows 50-53 highs 85-80-83. (seasonal averages high 83 low 52)

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Forecast for the Umpqua Basin including, Roseburg:  Mostly cloudy this AM, sunny this afternoon, clear in the evening, mostly cloudy at night and early Monday AM, sunny in the afternoon, then mostly clear Monday night highs 79-84 lows 52-56. Mostly sunny Tuesday, mostly clear Tuesday night,  partly cloudy Wednesday AM, sunny in the afternoon,  mostly clear Wednesday night highs 86-89 lows 54-56.  Mostly sunny Thursday, then partly cloudy Thursday night through Saturday highs 89-85 lows near 55.  (seasonal averages high 87 low 56)

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Forecast for the South Oregon Coast including Coos Bay and North Bend:  Mostly cloudy with areas of patchy fog and coastal drizzle early this AM, mostly cloudy in the afternoon and tonight, AM clouds then sunny Monday, mostly clear in the evening and mostly cloudy Monday night highs 63-60 lows 50-45. AM clouds, then sunny and a bit warmer  Tuesday, and becoming mostly cloudy Tuesday with patchy fog late at night high 64 low near 45. Partly cloudy and a bit warmer again Wednesday through Friday, then mostly cloudy Friday night and Saturday highs steady at about 63 lows near 50. (seasonal averages high 67 low 53).

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Forecast for the Cascades of Lane County:  A mix of clouds and sun today, mostly sunny Monday, mostly clear Monday night, a mix of clouds and sun Tuesday, and mostly clear Tuesday night free air freezing level rising to 13,000 ft. today , 14,000 ft. Monday night, 15,000 ft. Tuesday, and back to 14,000 ft. Tuesday night highs 75-80-77 lows 42-45-45 . Mostly sunny days and mostly clear nights and cooler Wednesday through Saturday  free air freezing level 14,000 ft. except 13,00 ft. Wednesday night highs 83-72  lows 50-45.

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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.