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Local DISTRICT OF COLUMBIA, US Weather Conditions |
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| Squall - A strong wind characterized by a sudden onset in which the wind speed increases at least 16 knots and is sustained at 22 knots or more for at least one minute. |
Local WASHINGTON, DISTRICT OF COLUMBIA, US Weather Conditions
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| Tropical wave - A kink or bend in the normally straight flow of surface air in the tropics which forms a low pressure trough, or pressure boundary, and showers and thunderstorms. Can develop into a tropical cyclone. |
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