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First Alert Weather: A new way to stay ahead of the weather
Types of Severe Weather Alerts & Warnings, The Weather Company, an IBM Business
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Mysterious Lightning 'Superbolts' Can Be 1,000 Times as Strong as Ordinary Strikes - Scientific American
First Alert Weather: Tracking lighting across the region
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LIVE: Flooding and tree damage reported as thunderstorms rumble through the Northeast
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Northern lights visible across Iowa and Nebraska Sunday night
California hit by nearly 11,000 lightning strikes in past 72 hours, some sparking brush fires
Lightning - Wikipedia