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Jun

22.

A wet night tonight, then wet with maybe even a thunderstorm for your Saturday.

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Here is my weekly weather quiz question. This is your last chance to win this week. 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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An upper level low (“U” shape on orange line) brought some moisture our way and produced showers. Weak high pressure (little “Arch” shape on orange line on last graphic) kept us dry through Thursday evening. A frontal system slides through and an upper level low has moved in behind the ridge both of which will return a chance of showers continuing. Another frontal system will approach the Pacific Northwest next week. It looks like the first week of the Olympic Track and Field Trials will be cool and at least a bit wet. Saturday will be very wet with showers and possible thunderstorms and showers tapering off as the new workweek begins and we should see some drying about midweek. The weather isn’t the only thing that will be a challenge to the athletes. The pollen count will stay high enough to bother those athletes who are allergic. So far, at least, we don’t have smoke from wildfires or grass field burning as we did during the previous Olympic Trials held here.

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The pollen count for the Eugene-Springfield area is:

Grass- High (59)

Trees-Low (6)

Data from Oregon Allergy Associates www.oregonallergyassociates.com.

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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis: Cloudy and cooler with showers likely (60%) tonight (0.25 in. of rain possible), showers likely (60%) Saturday (0.20 in. of rain possible, more in storms) with a slight (20%) chance of thunderstorms in the afternoon and evening, a good (50%) chance of showers Saturday night (under 0.10 in. of rain possible), a mix of clouds and sun Sunday with a good (50%) chance of showers (under 0.10 in. of rain possible), mostly cloudy with a (40%) chance of showers in the evening, partly cloudy with a slight (20%) chance of showers late Sunday night, a mix of clouds and sun with a (40%) chance of showers Monday, mostly cloudy with a good (50%) chance of evening showers, partly cloudy with a slight (20%) chance of showers late Monday night lows 50-46 highs 65-69. Partly cloudy with a (30%) chance of AM showers Tuesday, a slight (20%) chance of showers in the afternoon and evening, then just partly cloudy Tuesday night through Friday highs 70-75 cooling to 72 Friday lows 48-52. (seasonal averages high 75 low 49)

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Forecast for the Umpqua Basin including Roseburg: Mostly cloudy with showers and a slight (20%) chance of isolated thunderstorms with small hail possible this evening, showers late tonight (0.20 in. of rain possible, more in storms), showers likely (60%) Saturday AM, showers likely (60%) with a slight (20%) chance of thunderstorms in the afternoon (0.15 in. of rain possible), a good (50%) chance of showers Saturday night (0.10 in. of rain possible) and Sunday (under 0.10 in. of rain possible), a (30%) chance of showers Sunday night, mostly cloudy with a good (50%) chance of showers Monday AM, showers likely (60%) Monday afternoon, then mostly cloudy with a good (50%) chance of showers Monday night lows near 50 highs 63-70. Mostly cloudy with a (30%) chance of showers Tuesday AM, partly cloudy with a (40%) chance of showers in the afternoon, partly cloudy with a slight (20%) chance of showers Tuesday evening, partly cloudy Tuesday night through Thursday evening, mostly cloudy Thursday night and Friday AM, then partly cloudy with a slight (20%) chance of showers Friday afternoon highs 72-82 falling to near 80 Friday lows 49-53. (seasonal averages high 78 low 53)

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Forecast for the South Oregon Coast including Coos Bay and North Bend: Cloudy with showers this evening, showers likely (60%) late tonight (0.15 in. of rain possible) and Saturday AM, showers likely (60%) with a slight (20%) chance of thunderstorms in the afternoon (0.20 in. of rain possible) and evening, a (30%) chance of showers late Saturday night (0.10 in. of rain possible), mostly cloudy with a (40%) chance of showers Sunday (under 0.10 in. of rain possible), a slight (20%) chance of showers Sunday night, a good (50%) chance of showers Monday AM, showers likely (60%) in the afternoon, a good (50%) chance of showers Monday night lows 52-48 highs near 61. Mostly cloudy with a (30%) chance of showers Tuesday AM, partly cloudy with a (40%) chance of showers in the afternoon, a slight (20%) chance of showers in the evening, mostly cloudy late Tuesday night, partly cloudy Wednesday through Thursday evening, mostly cloudy Thursday night and Friday AM, then partly cloudy with a slight (20%) chance of showers Friday afternoon highs 59-65 cooling to near 60 Friday lows near 48-52. (seasonal averages high 62 low 51).

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Forecast for the Cascades of Lane County: Cloudy with showers tonight (0.50 in. of rain possible), AM showers, showers likely (60%) Saturday afternoon (0.10 in. of rain possible) and evening with a slight (20%) chance of thunderstorms, mostly cloudy with showers late Saturday night, a mix of clouds and sun with a good (50%) chance of showers Sunday AM, showers likely (60%) in the afternoon, mostly cloudy with a (40%) chance of showers Sunday evening, partly cloudy with a slight (20%) chance of showers Sunday night, a mix of clouds and sun with a (40%) chance of showers Monday AM, a chance of showers with a slight (20%) chance of thunderstorms in the afternoon and evening, then a (30%) chance of showers late Monday night snow level 7,500 ft. falling to 6,500 ft. tonight, 6,000 ft. Saturday through Sunday, 7,000 ft. Sunday night, partly cloudy Thursday afternoon snow level 7,500 ft. Monday, 7,500 ft. falling to 6,500 ft. late Monday night lows 39-36 highs 49-56. Partly cloudy with a good (50%) chance of showers Tuesday, a (30%) chance of showers in the evening, partly cloudy with a slight (20%) chance of showers late Tuesday night through Wednesday evening, partly cloudy late Wednesday night through Thursday, then partly cloudy with a slight (20%) chance of showers Friday afternoon snow level 6,500 ft. Tuesday, 7,500 ft. Tuesday night, above 8,000 ft. Wednesday and Wednesday evening, free air freezing level 11,000 ft. late Wednesday night and Thursday, 11,000 ft. rising to 12,000 ft. late Thursday night, then snow level above 8,000 ft. Friday highs 53-65 cooling to near 60 Friday lows 39-42.

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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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