Sky watchers could be in for a stunning show Friday night. The National Oceanic and Atmospheric Administration issued a rare geometric storm watch — the first in nearly 20 years. WCCO's Paul Douglas explains. 

<p>Sky watchers could be in for a stunning show Friday night. The National Oceanic and Atmospheric Administration issued a rare geometric storm watch — the first in nearly 20 years. WCCO's Paul Douglas explains. </p>

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