An upper level trough of low pressure (the “U” shaped dip in the yellow line) is moving eastward and that means it will stay cool today then start to warm up again Monday, but another trough will move in about Wednesday with no significant chance. It will warm up later in the week into the weekend and it should stay dry. A weak cold front will move in on Wednesday cooling us just a bit.

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Advisories:   NONE AT THIS TIME.

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The Updated Pollen Count Forecast for the Eugene-Springfield area : Trees LOW, Grass HIGH, and weeds LOW. Data 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 clear tonight, a few AM clouds then mostly sunny and warmer Monday, mostly clear Monday night, AM clouds and mostly sunny Tuesday, then mostly clear in the evening and mostly cloudy Tuesday night lows 44-50 highs 79-85.  Mostly cloudy Wednesday  AM, then mostly sunny and a bit cooler in the afternoon, and partly cloudy Wednesday night  high 83 low 50. A mix of clouds and sun and warmer Thursday through Sunday and partly cloudy at night highs 83-86 lows 48-50.(seasonal averages high 82 low 51)

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Forecast for the Umpqua Basin including Roseburg: Clear tonight, Monday night and Tuesday night, sunny and warmer Monday and Tuesday lows 52-54 highs 82-88. Mostly sunny and cooler Wednesday, mostly clear at night, sunny and warmer Thursday and clear Thursday night highs 85-88 lows 55-57. Mostly clear Friday night and Saturday night, mostly sunny Saturday and warmer Sunday lows 57-54 highs 87-90. (seasonal averages high 86 low 55)

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Forecast for the South Oregon Coast including Coos Bay and North Bend: Clear this evening,  then cloudy  tonight and Monday AM, mostly sunny Monday afternoon, partly cloudy in the evening and cloudy at night at the shore, clear in the evening then partly cloudy at night inland lows 48-52 high 64. Mostly cloudy at the shore Tuesday, AM clouds then mostly sunny in the afternoon inland, clear in the evening then mostly cloudy Tuesday night high 64 low 52. AM clouds, then mostly sunny and cooler Wednesday high near 60. Partly cloudy Wednesday night and Thursday low 50 high 65. Mostly clear Thursday night, then mostly sunny and warmer Friday, then mostly cloudy Friday night through Sunday lows 50-49 highs 64-67. (seasonal averages high 67 low 53).

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Forecast for the Cascades of Lane County:  Clear tonight, sunny Monday, and mostly clear Monday night, mostly sunny and warmer Tuesday, and mostly cloudy Tuesday night free air freezing level 14,000 ft.  lows 40-46 highs 73-79.  Mostly sunny Wednesday and mostly clear at night free air freezing level 14,000 ft. falling to 13,000 ft. at night high 79 low 45. A mix of clouds and sun and cooler Thursday through Sunday, mostly clear at night free air freezing level 13,000 ft. Thursday falling to 12,000 ft. Thursday night through Friday night, rising  to 13,000 ft. Saturday and Saturday night and back to 14,000 ft. Sunday highs 77-74 lows 46-42.

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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.