________________
Here it is another Monday and that means it’s time for a new weekly weather quiz question. Here it is. What is lake-effect snow? Please remember to post your answer as a comment by clicking on “no comments /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.
________________
Advisories: A FROST ADVISORY IS IN EFFECT FROM 2AM UNTIL 9 AM TUESDAY FOR CENTRAL DOUGLAS COUNTY AND THE EASTERN DOUGLAS COUNTY FOOTHILLS. A FREEZE WARNING IS IN EFFECT FROM 2 AM UNTIL 9 AM TUESDAY FOR EASTERN CURRY COUNTY, JOSEPHINE COUNTY, AND JACKSON COUNTY.
________________
The upper air flow (shaded area with blue arrows) will keep clouds and moisture over us through tonight and then migrate to the North a bit. A frontal system moved down with that airflow, but it is falling apart and has cleared out more quickly behind it. That means lots of sunshine for your Monday. The jet stream will move to the North allowing high pressure to take over and bring back the sun, for a while at least, starting Monday. That’s a day sooner than I originally expected. An upper air trough of low pressure will help usher in a frontal system late in the week that will return at least a slight chance of precipitation.
________________
Here are your detailed forecasts.**
________________
Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis: Partly cloudy today and tonight, patchy frost late at night and early Tuesday AM, mostly sunny Tuesday afternoon, mostly clear Tuesday night, patchy frost again late at night and early Wednesday AM, mostly sunny in the afternoon, then partly cloudy Wednesday night highs 62-56 lows 33-42. Mostly cloudy Thursday and Thursday night, mostly cloudy with a slight (20%) chance of rain Friday, a (40%) chance of rain Friday night, a (30%) chance of rain Saturday, mostly cloudy with a slight (20%) chance of showers Saturday night, then a mix of clouds and sun with a slight (20%) chance of showers Sunday highs 64-60 warming to near 64 Sunday lows 43-46. (seasonal averages high 60 low 40)
_______________
Forecast for the Umpqua Basin including Roseburg: Mostly cloudy this AM, mostly sunny in the afternoon, mostly clear with patchy frost late tonight and early Tuesday AM, sunny Tuesday afternoon, then mostly clear with patchy frost late Tuesday night and Wednesday AM, sunny in the afternoon, then partly cloudy Wednesday night highs near 60 lows 36-32 warming to near 40 Wednesday night. Partly cloudy Thursday, mostly cloudy Thursday night, mostly cloudy with a slight (20%) chance of rain Friday, a (40%) chance of rain Friday night, mostly cloudy with a slight (20%) chance of rain and cooler Saturday and Saturday night, then mostly cloudy with a slight (20%) chance of rain Sunday highs 62-65 lows 42-47. (seasonal averages high 63 low 43)
________________
Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy this AM, mostly sunny in the afternoon, mostly clear tonight, sunny Tuesday, clear Tuesday night, sunny Wednesday, then partly cloudy Wednesday night highs 59-63 lows 42-45. Mostly cloudy Thursday and Thursday night, mostly cloudy with a slight (20%) chance of rain Friday, a (30%) chance of rain Friday night and Saturday, then mostly cloudy with a slight (20%) chance of rain Saturday night and Sunday highs 62-59 lows near 50. (seasonal averages high 60 low 45).
_________________
Forecast for the Cascades of Lane County: A mix of clouds and sun this AM, mostly sunny this afternoon, partly cloudy tonight, sunny Tuesday, mostly clear Tuesday night, mostly sunny Wednesday, then partly cloudy Wednesday night free air freezing level 6,000 ft. today through Tuesday, rising to 8,000 ft. Tuesday night, 10,000 ft. Wednesday through Thursday night highs 44-50 lows 25-35. A mix of clouds and sun Thursday, mostly cloudy Thursday night, mostly cloudy with a slight (20%) chance of rain Friday, a (40%) chance of rain Friday night, a mix of clouds and sun with a (40%) chance of rain Saturday, a slight (20%) chance of showers Saturday night, then a mix of clouds and sun with a slight (20%) chance of showers Sunday free air freezing level 10,000 ft. Thursday and Thursday night, snow level above 8,000 ft. Friday, 7,000 ft. Friday night, 6,000 ft. Saturday, then 7,000 ft. Saturday night and Sunday highs 55-48 warming to 54 Sunday lows near 35.
________________
**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.
________________
Get your local Eugene-Springfield news on-line at Eugene Daily News.com.
________________