Statement I : Sudden fall of pressure at a place indicates storm.
Statement II : Air flows from higher pressure to lower pressure.
We know that the pressure of air decreases with height because of it the air having lower pressure comes downwards near to surface of ocean. This causes air to flow inwards towards the centre of storm at higher pressure around to it. Now on account of rotational of earth, this inflow of wind is deflected in counter clockwise, spiral in northern hemisphere.