Abyssal Storms

As the world’s alignment with the Other Planes the ease with which energy can pass into the world changes. The best known of these are the various portals which become active active during certain parts of the cycle but some slightly wider and lesser effects also exist.

Manifestation

In Lephia two such effects overlap with winds sometime being accelerated by the energy from the plane of air and the destructive nature of those winds being increased by energy from the necrotic planes. Such interactions are fairly rare as the world needs to be in the correct alignment with the planes and the winds need to pass through specific areas with enough natural speed for the interaction to happen.
When the wind does interact with energy with both planes it becomes what is is known in the area as an abyssal storm. These storms can have wind speeds faster than a dragon flies, and even objects or terrain that would normally be able to withstand such winds are rapidly eroded by the entropic nature of the energy the winds carry. Plants that are aren't pulled up by the force of the wind become withered, and any fauna caught out in the open age rapidly, with the life being visibly drained out of them.
Following the years of darkness at the end of The Second Age the increased proximity to the negative energy plane increased the intensity and frequency of the storms. As a result little was done to resettle Lephia during The Third Age.

Localization

Fortunately for the rest of the world these storms tend to play out quite quickly and rarely trouble anyone outside of Lephia.
The worst of the storms can be found in the centre of Lephia where one of the most powerful storms, the Howling Death, created the canyon known as the gouge.

Predictable disasters.

During The Second Age ways were developed to predict the alignment of the planes. However, unlike effects such as the Cycle tides these storms required both the planes and the natural winds to be interact in the right way. The unpredcitable nature of the wind, at least until the development of the Wind Guides, meant that many considered these storms to be equally unpredictable.