User blog:Olo72/Cyclone Kelvin

Yesterday we were able to witness a rather rare weather phenomenon in northwestern Australia: a tropical cyclone that developed an eye AFTER hitting land. In general, tropical cyclones develop a visible eye on satellite images when their intensity is reaching category 1 or higher on the Saffir Simpson scale.

That is, cyclones that are intensifying, which usually only happens on water. However, there are isolated cases of cyclones that continue to intensify or maintain their intensity after having penetrated the ground.

Development of eye after impact on land.

KELVIN reached category 1 on the scale of Saffir Simpson after touching land in the Australian Northwest, and developed his eye just at that time. In general, tropical cyclones begin to weaken rapidly just after entering land. This is due to the dramatic increase of low-level wind shear (much higher air friction on the earth's surface, vegetation, mountains) and the suppression of moisture supply to the system.

The landcanes, or tropical cyclones of the mainland.

However, there are cases of cyclones that continue to intensify after entering the land. And, others, in which the cyclone is directly formed on land. These are the so-called landcanes or cyclones of the mainland. In 2013, we see a story about these rare tropical cyclones. For example, the tropical storm ERIN of 2007, which developed an eye on the state of Oklahoma, USA, after weakening when making an impact from the Gulf of Mexico.

In 2010 also happened another very rare case of tropical storm over Namibia and Botswana, which was formed directly on these countries, thanks to the large amounts of moisture released by its surface with abundant water and vegetation.