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The_Doctor

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  1. The_Doctor
    Found this definition on the SPC website: "By definition, if the swath of wind damage extends for more than 250 miles (about 400 kilometers), includes wind gusts of at least 58 mph (93 km/h) along most of its length, and also includes several, well-separated 75 mph (121 km/h) or greater gusts, then the event may be classified as a derecho. " I think that the North Dakota and Southern Illinois storms would be considered derechos under this definition. Certainly a very active day of severe weather
  2. The_Doctor
    A question I have is why on visible satellite loops areas far from the totality path appear to get very dark when on the ground there is not much (but still noticeable) dimming.
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