NASA tracks Norbert moisture to Arizona's drenching thunderstorms

Post-tropical storm Norbert may have been centered a couple of hundred miles off the northwestern coast of Mexico's Baja California, but the flow of warm, moist air that spun around it generated drenching thunderstorms over Arizona. NASA's TRMM satellite saw Norbert's remnants and those Arizona thunderstorms dropping rainfall at over 2 inches per hour.

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