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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 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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An upper level low (“U” shape on orange line) brought some moisture our way and produced a few showers. Weak high pressure (little “Arch” shape on orange line on last graphic) kept us dry through Thursday evening. A frontal system slides through today 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. 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 rain today (0.25 in. of rain possible), cloudy with showers likely (60%) tonight (0.25 in. of rain possible), showers likely (60%) Saturday (under 0.10 in. of rain possible), a good (50%) chance of showers Saturday night (under 0.10 in. of rain possible), a mix of clouds and sun Sunday AM with a (40%) chance of showers, a slight (20%) chance of showers Sunday afternoon (under 0.10 in. of rain possible), mostly cloudy with a slight (20%) chance of showers Sunday night highs 63-60 warming to 68 Sunday lows 50-46. A mix of clouds and sun with a (40%) chance of showers Monday, mostly cloudy with a (30%) chance of evening showers, partly cloudy with a slight (20%) chance of showers late Monday night through Wednesday evening, just partly cloudy Wednesday night, then mostly sunny Thursday AM and partly cloudy Thursday afternoon highs 70-75 lows 48-50. (seasonal averages high 75 low 49)

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Forecast for the Umpqua Basin including Roseburg: Mostly cloudy with rain this AM, showers this afternoon (0.25 in. of rain possible), showers likely (60%) tonight (0.20 in. of rain possible) and Saturday (0.15 in. of rain possible), a good (50%) chance of showers Saturday night (0.10 in. of rain possible), mostly cloudy with a good (50%) chance of showers Sunday (under 0.10 in. of rain possible) and Sunday night highs 63-70 lows near 48. Mostly cloudy with a good (50%) chance of showers Monday and Monday night, partly cloudy with a slight (20%) chance of showers Tuesday through Wednesday night, then partly cloudy Thursday highs 70-80 lows 48-53. (seasonal averages high 78 low 53)

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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy with rain this AM, showers this afternoon (0.50 in. of rain possible), coastal showers likely (60%) tonight (under 0.15 in. of rain possible), inland evening showers, showers likely (60%) late tonight (0.10 in. of rain possible), showers Saturday AM, showers likely (60%) in the afternoon (0.20 in. of rain possible) and evening, a good (50%) 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) and Sunday night highs 57-60 lows 49-46. Mostly cloudy with a good (50%) chance of showers Monday and Monday night, partly cloudy with slight (20%) chance of showers Tuesday through Wednesday night, then just partly cloudy Thursday highs 59-65 lows near 48-52. (seasonal averages high 62 low 51).

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Forecast for the Cascades of Lane County: Cloudy with showers this AM, rain and cooler this afternoon (0.25 in. of rain possible), showers tonight (0.50 in. of rain possible) and Saturday (0.10 in. of rain possible), mostly cloudy with showers likely (60%) in the evening, then showers late Saturday night, a mix of clouds and sun with a good (50%) chance of showers Sunday, mostly cloudy with a (30%) chance of showers Sunday night snow level above 8,000 ft. today, 7,500 ft. falling to 6,500 ft. tonight, 6,000 ft. Saturday through Sunday, 7,000 ft. Sunday night highs 48-55 lows 40-36 rising to 40 Sunday night. A mix of clouds and sun with a (40%) chance of showers Monday, mostly cloudy with a (30%) chance of evening showers, partly cloudy with a slight (20%) chance of showers late Monday night, partly cloudy with a slight (20%) chance of showers Tuesday through Wednesday evening, partly cloudy late Wednesday night, mostly sunny Thursday AM, then partly cloudy Thursday afternoon snow level 7,500 ft. Monday, 7,000 ft. Monday night, rising to above 8,000 ft. Tuesday through Wednesday night, then free air freezing level 11,000 ft. rising to 12,000 ft. Thursday afternoon highs 58-63 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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