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This is your last chance to win by correctly answering my weekly weather quiz question. Here it is. What is a blocking ridge?  Please post your answer as a comment by clicking on “no comments” in the upper right hand portion of this page under the caption, then add your comment. The first person to post the correct answer will win a week of free personalized  weather forecasts tailored to your needs. The answer has to be a comment to win. An email answer will not count. Good luck.

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The jet stream shows a high pressure ridge ( “arch” shaped area over the Pacific Northwest) is keeping us under a relatively calm weather pattern through the rest of the week. Remember that, particularly this time of the year, often when it’s not raining it is usually fogging. The next frontal system (shown offshore) should move in Saturday with other frontal systems following behind it (positions shown are for Monday).

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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 tonight and Saturday, rain likely (60%) Saturday evening, rain  Saturday night (0.50 in. of rain possible), mostly cloudy with AM rain likely (60%) Sunday, a good (50%) chance of afternoon rain (0.25 in. of rain possible), a slight (20%) chance of rain Sunday evening, rain likely (60%) Monday, then rain Monday night lows 34-43 cooling to 40 Sunday night and 35 Monday night highs 52-55. Mostly cloudy with rain likely (60%) Tuesday, showers likely (60%) Tuesday night through Thursday, then a good (50%) chance of showers Thursday night and Friday highs 49-44 lows 33-30. (seasonal  averages high 50 low 35)

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Forecast for the Umpqua Basin including, Roseburg: Mostly cloudy tonight, mostly cloudy with a slight (20%) chance of rain Saturday afternoon, rain likely (60%) in the evening, rain late Saturday night, mostly cloudy with a good (50%) chance of rain Sunday, a slight (20%) chance of rain Sunday evening, cloudy with a slight (20%) chance of AM rain Monday, then rain in the afternoon and Monday night lows near highs 59-55. Mostly cloudy with rain Tuesday, rain and snow showers Tuesday night through Friday highs 49-45 lows 37-32. (seasonal averages high 54 low 36)

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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy tonight, mostly cloudy with a slight (20%) chance of rain Saturday afternoon, rain likely (60%) in the evening, rain Saturday night, mostly cloudy with AM coastal rain likely (60%), and a good (50%) chance of rain Sunday afternoon, a good (50%) chance of rain inland,  a (30%) chance of rain Sunday evening, then rain and breezy Monday and Monday night lows 42-47 cooling to 43 Monday night highs 54-50 warming to 56 Monday. Mostly cloudy with rain and breezy Tuesday, showers and colder Tuesday night, showers likely (60%) Wednesday, rain and snow showers likely (60%) Wednesday night, showers likely (60%) Thursday, rain and snow showers likely (60%) Thursday night and Friday AM, then showers likely (60%) Friday afternoon highs 50-45 lows near 38. (seasonal averages high 54 low 41).

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Forecast for the Cascades of Lane County:  Mostly cloudy tonight, mostly cloudy with a slight (20%) chance of rain mainly North Saturday afternoon, cloudy with rain increasing and moving Southward Saturday night (0.50 in. of rain possible), AM rain, then rain likely (60%) Sunday afternoon (1-3 in. of snow possible, 0.25 in. of rain possible),  a slight (20%) chance of rain Sunday night, mostly cloudy with rain Monday, then rain and snow Monday night free air freezing level 8,000 ft. tonight and Saturday, 7,000 ft. falling to 6,000 ft. Saturday late night, 6,000 ft. Sunday and Sunday night, 5,500 ft. Monday, and 4,500 ft. Monday night lows 27-32 highs near 43. Mostly cloudy with occasional snow Tuesday, snow showers likely (60%) Tuesday night through Thursday, then mostly cloudy with a good (50%) chance of snow showers Thursday night and Friday snow level 2,500 ft. Tuesday, falling to the surface and holding there from Tuesday night through Friday highs near 35 lows 27-22.

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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.