The Clarnola Storm

Every ten to twenty years the Clarnola sea off the southwest coast of Anicarta becomes impassable for two months during the spring or fall each. There are many storms, each separate devastating storm, however, each storm just blends into another for two months. Sometimes there is a day break but that is a very rare occurrence. These storms happen when there are strong winds coming from the north and from the south at the same time. These winds collide causing storm after storm. Whipping up the sea into high waves and unpredictable top currents. With that, there is torrential rain, with winds that whip back and forth. There is lighting and thunder, sometimes even hail if close to the colder months. 
On land these storms cause flooding, delay planting or destroy the crops right before harvest. Makes sea transport unavailable and over land is very risky. So these storms cause much damage isolation. A few times there has been little warning of the start of the storms which is not the norm. Most of the time there are several warnings like the night sky is an old reddish purple at night a few nights before the heavy storms appear. Several whirlpools appearing not far off the coast. Winds change direction quickly. The temperatures fluctuate rapidly depending on which wind is dominating at the time. When these warning signs appear the people have two weeks to a month to prepare. In the fall many harvest what they can, gathering necessary items. In the spring they gather what they have left over. In both cases after preparing the people retreat to the mountains and caves that have been carved into them long ago to escape the southern storms. Once the two months have passed the people return to their homes. They repair and rebuild what they need to and continue on. The flooding does bring in new topsoil which the farmers use to enrich their crops for the next few years. This cycle just keeps repeating and the people just adjust to the weather preparing for the next Clarnola storm.