When is the wind group at one of the forecast altitudes omitted at a specific location or station in the Winds and Temperatures Aloft Forecast (FD)? When the wind

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SIGMET’s are issued as a warning of weather conditions potentially hazardous

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Which weather forecast describes prospects for an area coverage of both severe and general thunderstorms during the following 24 hours?

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(Refer to figure 9.) What type of thunderstorm activity is expected over Montana on April 4th at 0800Z?

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