Here is this week’s weather quiz question. What is water’s “triple point”? Please be specific. Place your answer as a comment after the forecasts on this page. The first person to post the correct answer will win one free week of personalized forecasts tailored to your own needs. Good luck.

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The jet stream is going to be set up to bring rain and then give us another short break about mid week. Here is the new frontal system as it’s moving onshore. You can see the break in storms for Wednesday that will last a very short time as the next storm system will be offshore and move in on Thursday.

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Advisories: A HIGH SURF ADVISORY IS IN EFFECT UNTIL MIDNIGHT  TONIGHT FOR THE NORTH AND CENTRAL OREGON COAST. A HIGH SURF ADVISORY IS IN EFFECT UNTIL  10 PM TODAY FOR THE SOUTH OREGON COAST. A WINTER WEATHER ADVISORY IS IN EFFECT FROM 1 PM THIS AFTERNOON UNTIL 7 AM TUESDAY ABOVE 4,000′  (1-2″ of snow) FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY AND WESTERN LAKE COUNTY .

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Forecast for the Central and  Southern Willamette Valley including Eugene-Springfield and Albany-Corvallis:  Mostly cloudy with AM showers likely (60%) today then a good (50%) chance in the afternoon high 50. Mostly cloudy tonight with a good (50%) chance of evening showers and a slight (20%) chance late low 35. A slight (20%) chance of showers Tuesday high 49. Partly cloudy Tuesday night low near 34. A mix of clouds and sun Wednesday high 49. Partly cloudy Wednesday night low 37. Mostly cloudy with a good (50%) chance of rain Thursday and rain likely (60%) Thursday night  high again near 50 low near 40. Rain likely (60%) Friday and Friday night high 50 low 42. Mostly cloudy with a (30%) chance of rain Saturday through Sunday  highs near 50 lows near 40.

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Forecast for the Umpqua Basin including Roseburg:   Showers likely (60%) today snow level 3,500′ high 53. Mostly cloudy with a  (40%) chance of showers tonight snow level 3,500′ late low 40. Mostly cloudy with a slight (20%) chance of showers Tuesday and Tuesday night high 53 low 35. Mostly cloudy Wednesday and Wednesday night high 48 low 36.  Mostly cloudy Thursday and a slight (20%)  chance late Thursday night high 54 low 40. Rain likely (60%) Friday high 52. Mostly cloudy with a good (50%) chance of rain Friday night low 40.  Just a slight (20%) chance of rain Saturday through Sunday high near 50 Saturday and 55 Sunday  low still at 40.

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Forecast for the South Oregon Coast including Coos Bay and North Bend: Showers likely (60%) today high 53. Mostly cloudy with a good (50%) chance of rain tonight low 42. Mostly cloudy with a (30%) chance of showers Tuesday and a slight (20%) chance of showers Tuesday night high 52 low 39. Partly cloudy AM then mostly cloudy Wednesday and partly cloudy at  night high 52 low 42. Mostly cloudy Thursday and a good (50%) chance of rain Thursday night high 54 low 40. Rain likely (60%) Friday and a good (50%) chance of rain Friday night high 52 low 39 . Mostly cloudy with a (30%) chance of showers Saturday ( high 50) and a slight (20%) chance  Saturday night and Sunday  low 40 high 54 .

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Forecast for the Cascades of Lane County:  Mostly cloudy with rain and snow showers likely (60%) today snow level 4,000′ 2″ of snow high 34 . A good (50%) chance of rain and snow showers tonight snow level 4,000′ 1-3″ of snow low 27. Mostly cloudy with a (40%) chance of rain and snow showers Tuesday snow level 4,000′ high 37. Just a slight (20%) chance of rain and snow showers Tuesday night snow level holding at 4,000′ low 27. A mix of clouds and sun Wednesday and partly cloudy at night free air freezing level 5,000′ rising to 5,500′ high 38 low 28. Mostly cloudy with a (30%) chance of rain and snow Thursday snow level 5,000′ high 39 . Mostly cloudy with a  good (50%) chance of rain Thursday night snow level 5,500′ low 30. A (60%) chance of rain Friday snow level 5,500′ high 38. A  good (50%) chance of rain and snow Friday night then a (30%) chance Friday night through Sunday snow level 4,000′ lows near 30 highs in the mid to upper 30s.

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