An anticyclonic storm is a weather storm where winds around the storm flow contrary to the direction dictated by the Coriolis effect about a region of low pressure. In the northern hemisphere, anticyclonic storms involve clockwise wind flow; in the southern hemisphere, they involve counterclockwise wind flow.
Anticyclonic storms usually form around high-pressure systems. These do not "contradict" the Coriolis effect; it predicts such anticyclonic flow about high-pressure regions. Anticyclonic storms, as high-pressure systems, usually accompany cold weather and are frequently a factor in large snowstorms. Jupiter's Great Red Spot is a well-known extraterrestrial example of an anticyclonic system.
Anticyclonic tornadoes often occur; while tornadoes' vortices are low-pressure regions, this occurs because tornadoes occur on a small enough scale such that the Coriolis effect is negligible.
Famous quotes containing the word storm:
“When the storm rattles my windowpane
I’ll stay hunched at my desk, it will roar in vain
For I’ll have plunged deep inside the thrill
Of conjuring spring with the force of my will,
Coaxing the sun from my heart, and building here
Out of my fiery thoughts, a tepid atmosphere.”
—John Ashbery (b. 1927)