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Sorry, but no winner this week. I’ll repeat the question. In meteorology what are elves? Here is the correct answer. Elves are bright flashes of light in the night sky resulting from lightning within thunderstorms. The thin upper atmosphere gives off a brief glow as the electromagnetic pulse from a lightning bolt passes through on its way to outer space. Elves are too fast to be seen with the naked eye, last less than one-thousandth of a second. I’ll have another weekly weather quiz question for you starting next Monday. 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 trough of low pressure ( “U” shaped area) swinging through the Pacific Northwest with another one following behind it. A frontal system is coming in now for another round of wet weather. We’ll see another frontal system move in Monday.  It’s been a long time coming, but a high pressure ridge will move in late next week into the weekend warming us up so it will feel more like Spring.

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Advisories:   A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 11 AM TODAY FOR THE SOUTH CENTRAL AND SOUTH OREGON CASCADES AND THE SISKIYOU MOUNTAINS,  THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN LAKE COUNTY.

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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 with showers today with isolated thunderstorms (0.25 in. of rain possible, and small hail possible), showers likely (60%) this evening, rain likely (60%) late tonight (0.10 in. of rain possible), AM rain, showers and a slight (20%) chance of thunderstorms Sunday afternoon (0.25 in. of rain possible), showers likely (60%) with a chance of evening thunderstorms, a good (50%) chance of showers Sunday night (0.10 in. of rain possible) and Monday, then rain likely (60%) Monday night highs 50-55 lows 40-43. Mostly cloudy with showers likely (60%) Tuesday, a (30%) chance of showers Tuesday night, partly cloudy with a (40%) chance of showers Wednesday, mostly cloudy with a slight (20%) chance of showers Wednesday night, partly cloudy with a slight (20%) chance of showers Thursday, mostly cloudy with a good (50%) chance of showers Thursday night, then partly cloudy with a good (50%) chance of showers Friday highs 55-63 lows near 42. (seasonal  averages high 57 low 37)

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Forecast for the Umpqua Basin including, Roseburg:  Mostly cloudy with rain and snow showers this AM, showers this afternoon (snow level 2,000 ft. rising to 2,500 ft.), showers likely (60%) tonight (snow level 2,500 ft. late), showers Sunday (snow level 2,500 ft. rising to 3,000 ft. in the afternoon), showers likely (60%) Sunday night (snow level 3,000 ft.), mostly cloudy with a good (50%) chance of AM rain and snow showers Monday , a (40%) chance of afternoon showers (snow level 3,000 ft.), cloudy with showers Monday night, showers likely (60%) Tuesday, then mostly cloudy with a slight (20%) chance of  showers Tuesday night highs 50-57 lows 38-46. Mostly cloudy with a slight (20%) chance of showers and warmer Wednesday, partly cloudy with a slight (20%) chance of showers Wednesday night and Thursday, then mostly cloudy with a (40%) chance of showers Thursday night and Friday highs 62-68 lows 42-45. (seasonal averages high 61 low 39)

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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy with showers today, coastal showers tonight and showers likely (60%) inland,  showers Sunday and windy (wind: S 20-25 mph gusts to 40 mph shifting SW 15-20 mph in the afternoon), showers likely (60%) Sunday night,  a (40%) chance of showers Monday,  then showers likely (60%) Monday night highs 48-54 lows 40-45. Mostly cloudy with showers likely (60%) Tuesday,  a (30%) chance of showers Tuesday night, partly cloudy with a (40%) chance of showers and warmer Wednesday, a slight (20%) chance of showers Wednesday night and (40%) Thursday, then mostly cloudy with a (40%) chance of showers Thursday night and Friday highs 55-62 lows 40-47. (seasonal averages high 56 low 42).

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Forecast for the Cascades of Lane County: Mostly cloudy with rain and snow showers today (3-6 in. of snow possible), snow showers likely (60%) this evening, snow likely (60%) tonight (2-4 in. of snow possible), rain and snow showers Sunday (4-7 in. of snow possible), snow showers likely (60%) Sunday night (1-4 in. of snow possible), a good (50%) chance of snow showers Monday, then snow and rain Monday night snow level 2,500 ft. today and tonight, 2,500 ft. rising to 3,000 ft. Sunday,  2,500 ft. Sunday night, then 3,000 ft. Monday and Monday night highs 34-43 lows 26-30. Mostly cloudy with snow showers, rain showers likely (60%) Tuesday,  a good (50%) chance of rain and snow showers Tuesday night, partly cloudy with a (40%) chance of rain and snow showers Wednesday, partly cloudy with a (30%) chance of showers Wednesday night, then mostly cloudy with a (40%) chance of showers Thursday, and a good (50%) chance of showers Thursday night and Friday snow level 3,500 ft. Tuesday and Tuesday night, 4,000 ft. Wednesday, then rising to 6,000 ft. Wednesday night through Thursday night, then 5,500 ft. Friday highs 40-50 lows 29-33.

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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.