(a.) Having equal pressure.

aerographic aerologic angry baric barographic barometric circumgyratory circumvolutory climatologic cloudy dirty elemental foul gulfy gyral gyrational gyratory gyrostatic high-pressure isobaric isometric isopiestic macroclimatic meteorologic microclimatic microclimatologic raging rainy rotary rotational rotatory storming stormy swirly tempestuous tornadic trochilic turbulent typhonic typhoonish vertiginous vortical whirlabout whirligig whirlwindish whirlwindy whirly