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Here is my new weekly weather quiz question. I’ll give you a definition and you tell me what I am defining. It is a warmer than normal period after the first frost in the Fall. What have I defined? Please place your answer as comment after the forecasts. The first person to post the correct answer will win a week of free personalized weather forecasts tailored to your needs, Good luck.

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A  high pressure ridge (“Arch” shape in the jet stream) has brought sunshine to the Pacific Northwest and  is still keeping us warmer than normal..  A weak  frontal system offshore will move inland Wednesday, but should stay mainly to the North. That means it will not do much to change our weather either.  A frontal system will push through by early Sunday as an upper level low pressure trough migrates Eastward across Oregon. Other disturbances will pass mostly to the North continuing the milder weather.

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Advisories:  NONE AT THIS TIME.

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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 clear this evening,  partly cloudy tonight, AM clouds, mostly sunny Wednesday, and mostly clear Wednesday night lows 54-50 high 85. Mostly sunny Thursday, partly cloudy Thursday night with patchy fog late at night, a mix of clouds and sun Friday and Saturday, partly cloudy Friday night and Saturday night highs 82-75 lows near 50. A mix of clouds and sun Sunday AM, mostly cloudy with a slight (20%) chance of rain Sunday afternoon and evening, a (30%) chance of rain late at night and  Monday AM, a (30%) chance of showers Monday afternoon and evening, a slight (20%) chance of showers late at night and Monday AM, then a mix of clouds and sun Monday afternoon highs 74-70 lows near 50 . (seasonal averages highs 73 low 44)

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Forecast for the Umpqua Basin including, Roseburg:  Mostly clear this evening, mostly cloudy tonight and Wednesday AM,  sunny Wednesday afternoon through Friday with mostly clear skies through Thursday night, and partly cloudy Friday night lows 58-53 highs 85-88-81. Partly cloudy Saturday and Saturday evening, mostly cloudy Saturday night, mostly cloudy with a slight (20%) chance of rain Sunday and Sunday night, mostly cloudy Monday AM, then partly cloudy with a slight (20%) chance of showers Monday afternoon and night, and partly cloudy Tuesday highs 80-70 lows 50-54. (seasonal averages high 77 low 47)

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Forecast for the South Oregon Coast including Coos Bay and North Bend:  Partly cloudy  this evening, mostly cloudy tonight with patchy coastal fog late at night and Wednesday AM, sunny Wednesday afternoon, mostly clear Wednesday night, sunny Thursday with patchy AM coastal fog, and mostly cleat Thursday night lows 53-55 highs 66-69. Mostly sunny Friday, mostly clear Friday night,  partly cloudy Saturday and Saturday evening, mostly cloudy Saturday night, mostly cloudy with a slight (20%) chance of rain Sunday afternoon and night, AM clouds then partly cloudy with a slight (20%) chance of showers Monday and Monday night, then partly cloudy Tuesday highs 63-65 lows 50-53. (seasonal averages high 66 lows 48).

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Forecast for the Cascades of Lane County: Mostly clear  tonight, mostly sunny Wednesday through Friday, mostly clear each night  free air freezing level 15,000 ft. tonight, 14,000 ft. Wednesday and Wednesday night, 15,000 ft. Thursday and Thursday night, back to 14,000 ft.  Friday and Friday night lows ranging from 42-45 highs 74-69. A mix of clouds and sun Saturday, partly cloudy Saturday night, a mix of clouds and sun Sunday AM, mostly cloudy with a slight (20%) chance of rain Sunday afternoon and evening, a (30%) chance of rain late at night and Monday AM, then a  (30%) chance of showers in the afternoon and evening, a slight (20%) chance of showers late Monday night and Tuesday free air freezing level 14,000 ft. Saturday,  13,000 ft. Saturday night, snow level above 8,000 ft. Sunday through  Tuesday highs 67-60 low near 44.

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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.