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Jun

21.

It looks like our “Summer” weather is going to be in hiding for quite a while as clouds and the chance of showers increase.

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Category: Uncategorized

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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) will keep us dry through this evening. A frontal system will slide through and an upper level low will move in behind the ridge both of which will return the slight chance of showers by late tonight and another frontal system will follow just as the Olympic Trials open and continue into the weekend and next week as a frontal system . 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: Partly cloudy this evening, becoming mostly cloudy with a (40%) chance of showers late tonight (under 0.10 in. of rain possible), cloudy and cooler with rain Friday (0.10 in. of rain possible), cloudy with showers likely (60%) Friday night (0.15 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 with a (40%) chance of AM showers, a slight (20%) chance of showers Sunday afternoon, mostly cloudy in the evening and partly cloudy with a slight (20%) chance of showers Sunday night lows 54-46 highs 63-60 warming to 68 Sunday. A mix of clouds and sun with a slight (20%) chance of showers Monday, partly cloudy with a slight (20%) chance of showers Monday night through Wednesday evening, just partly cloudy Wednesday night, then mostly sunny Thursday AM and partly cloudy Thursday highs 70-75 lows 48-50. (seasonal averages high 75 low 48)

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Forecast for the Umpqua Basin including Roseburg: Partly cloudy this evening, mostly cloudy with rain likely (60%) late tonight (under 0.10 in. of rain possible), rain Friday AM, showers Friday afternoon (0.25 in. of rain possible) through Saturday morning, showers likely (60%) Saturday afternoon and evening (0.15 in. of rain possible), a good (50%) chance of showers late Saturday night (0.10 in. of rain possible), mostly cloudy with a (30%) chance of showers Sunday (under 0.10 in. of rain possible)and Sunday night lows 55-47 highs 63-70. Mostly cloudy with a (30%) chance of showers Monday AM, partly cloudy with a slight (20%) chance of thunderstorms Monday afternoon and evening, partly cloudy with a slight (20%) chance of showers late Monday night through Wednesday night, then partly cloudy Thursday highs 70-80 lows 49-53. (seasonal averages high 77 low 53)

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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy with a slight (20%) chance of coastal drizzle this evening, rain likely (60%) late tonight (under 0.10 in. of rain possible), rain Friday AM, showers in the afternoon (0.30 in. of rain possible), coastal showers likely (60%) Friday night (under 0.10 in. of rain possible), inland evening showers, showers likely 60%) late Friday night (0.10 in. of rain possible), showers Saturday, showers likely (60%) in the evening, a good (50%) chance of showers late Saturday night, mostly cloudy with a (40%) chance of showers Sunday and Sunday night lows 53-47 highs 57-60. Mostly cloudy with a (40%) chance of showers Monday, partly cloudy with a slight (20%) chance of showers Monday night 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: Mostly cloudy with a slight (20%) chance of thunderstorms this evening, a (40%) chance of showers late tonight (under 0.10 in of rain possible, more in thunderstorms), cloudy with a good (50%) chance of rain Friday AM, rain and cooler Friday afternoon (0.25 in. of rain possible), showers Friday night (0.20 in. of rain possible) and Saturday (0.15 in. of rain possible), mostly cloudy with showers likely (60%) in the evening, then a good (50%) chance of showers late Saturday night, a mix of clouds and sun with a (40%) chance of showers Sunday, mostly cloudy with a (30%) chance of showers Sunday night snow level above 8,000 ft. tonight and Friday, 7,500 ft. falling to 6,000 ft. Friday night through Sunday, 7,000 ft. Sunday night lows 43-36 rising to 40 Sunday night highs 48-55. A mix of clouds and sun with a (30%) 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. Thursday 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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