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Mike Collins
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Mike Collins
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PostTue Aug 16, 2022 6:24 pm 
Tomorrow between 10 PM-Midnight there is a strong likelihood of viewing the northern lights in Washington state. It might extend down to the Oregon border. The chart is the aurora forecast. The Kp-index rating of 7 is considered to be a strong geomagnetic storm. A rating of 9 (the highest) is rare, happening on average once every three years.

Anne Elk
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Redwic
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PostTue Aug 16, 2022 7:34 pm 
Thanks for the update! Great timing, as I might actually be camping on a ridgetop tomorrow!

Year 2022: 50 pounds lighter but not 50 points brighter.
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NWtrax
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PostThu Aug 18, 2022 6:39 pm 
Anyone see anything last night? Was going to try tonight.

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Mike Collins
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Mike Collins
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PostThu Aug 18, 2022 6:43 pm 
Some folks saw the aurora borealis in Winthrop. Nothing in western WA.

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NWtrax
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PostThu Aug 18, 2022 6:50 pm 
Good to know, thanks Mike

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gb
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gb
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PostFri Aug 19, 2022 9:54 am 
I've only seen one really good Aurora and that was near Whistler, BC. I believe the Kp index was seven or eight. It seems like 7 is pretty necessary in Washington and the high rating has to mesh with the darkest night skies. https://www.swpc.noaa.gov The 27 day forecast is quite good for September 3, 4. I guess that is just the rotational period for the sun....

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