The formation of a front. The dissipation of a front. Frost Moisture that freezes on surfaces usually in clear, stable air and light winds. A tornado not touching the ground. High Pressure Area Anticyclone.
Winds flow clockwise away from the center.
A region of stable and descending air. IFR Instrument flight rules. Increasing Cloudiness Used when the amount of the sky covered with clouds is expected to be greater than at the present time. Often used to suggest the approach of stormy weather. Isobar A line connecting points of equal pressure.