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Here is my new weekly weather quiz question. When tornadoes strike they have very strong winds. It is not possible to actually measure the winds created by tornadoes, so Dr. T. Ted Fujita created a scale of wind speeds based on the damage caused by the tornado. As of 2007  his designations have been changed. For example a tornado was listed as an F4 and now might be designated as an EF4. What does the “E” stand for and what does it mean? 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.

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Advisories: NONE AT THIS TIME.

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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis: Mostly cloudy with a slight (20%) chance of  isolated showers tonight, a mix of clouds and sun Tuesday with a slight (20%) chance of AM showers, partly cloudy Tuesday night, mostly sunny Wednesday, mostly clear Wednesday night, mostly sunny Thursday, then partly cloudy wit a slight (20%) chance of showers late Thursday night lows 46-43 warming to near 53 Thursday night highs 70-78. A mix of clouds and sun Friday with a slight (20%) chance of showers AM showers and a (40%) chance of showers Friday afternoon, partly cloudy in the evening and mostly cloudy late Friday night with a (40%) chance of showers, a mix of clouds and sun with a (40%) chance of showers Saturday, partly cloudy with a (40%) chance of showers Saturday night, a mix of clouds and sun with with a (40%) chance of showers Sunday AM, a slight (20%) chance of showers Sunday night, then a mix of clouds and sun with a slight (20%) chance of showers Monday highs 67-74 lows near 50. (seasonal averages high 74 low 48)

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Forecast for the Umpqua Basin including Roseburg: Mostly cloudy tonight, mostly cloudy with a slight (20%) chance of  showers Tuesday AM, partly cloudy Tuesday afternoon through Wednesday AM, mostly sunny in the afternoon, mostly clear in the evening, partly cloudy late Wednesday night and Thursday, then mostly cloudy with a (40%) chance of showers Thursday night, lows 46-55 highs 74-83. Partly cloudy and cooler with a slight (20%) chance of showers Friday, partly cloudy in the evening and mostly cloudy and cooler with a (30%) chance of showers and cooler late Friday night and Saturday, mostly cloudy with a (30%) chance of showers Saturday night and Sunday, then mostly cloudy with a slight (20%) chance of showers Sunday night and Monday highs 68-73 lows near 51. (seasonal averages high 76 low 52)

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Forecast for the South Oregon Coast including Coos Bay and North Bend: Partly cloudy this evening, just mostly cloudy tonight and Tuesday AM with a slight (20%) chance of AM showers, partly cloudy Tuesday afternoon through Wednesday AM, mostly sunny in the afternoon, then partly cloudy Wednesday night and Thursday, then mostly cloudy with a (40%) chance of showers Thursday night lows 46-53 highs 59-63. Mostly cloudy with a good (50%) chance of showers Friday, showers likely (60%) Friday night and Saturday, mostly cloudy with a (40%) chance of showers Saturday night and Sunday, then mostly cloudy with a slight (20%) chance of showers Sunday night and Monday highs 59-62 lows near 50. (seasonal averages high 62 low 51).

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Forecast for the Cascades of Lane County: Mostly cloudy with a slight (20%) chance of isolated showers tonight (under 0.10 in. of rain possible), a mix of clouds and sun Tuesday with a (30%) chance of AM showers, partly cloudy Tuesday night, mostly sunny and warmer Wednesday, mostly clear Wednesday night, mostly sunny Thursday AM, becoming partly cloudy with a slight (20%) chance of showers late Thursday afternoon, then mostly cloudy with as (30%) chance of showers Thursday night snow level 7,000 ft. tonight, 6,500 ft, Tuesday, free air freezing level 9,000 ft. rising to 10,000 ft. Tuesday night, 12,000 ft. Wednesday, 13,000 ft. Wednesday night, snow level 10,000 ft. Thursday, then above 8,000 ft. Thursday night lows 35-44 highs 56-70. Mostly cloudy with a (40%) chance of showers Friday AM, showers likely (60%) Friday afternoon and evening, a good (50%) chance of showers Friday night, a mix of clouds and sun with a good (50%) chance of showers Saturday, mostly cloudy with a (40%) chance of showers Saturday night, a mix of clouds and sun Sunday with  a (40%) chance of showers, a (30%) chance of showers Sunday night, then a mix of clouds and sun with a slight (20%) chance of showers Monday snow level above 8,000 ft. Friday and Friday night, 6,500 ft. Saturday, 7,000 ft. Saturday night, then 7,500 ft. Sunday through Monday highs 52-62 lows 42-35 warming to 43 Sunday night.

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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.

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Get your local Eugene-Springfield news on-line at Eugene Daily News.com

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