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Saturday, 06 March 2021, 18:00 UTC





Satellite image, 06.03., 13 UTC
Data Source: NASAview
Sea surface temperature in C, 06.03., 12 UTC
Data Source: CIMSS
Stormtrack Noran, 06.03., 12 UTC
Data Source: CIMSS
Deep layer shear in kn, 06.03., 12 UTC
Data Source: CIMSS


Severe Tropical Cyclone
South Pacific New Caledonia

Issued: Saturday, 06 March 2021, 18:00 UTC

Tropical cyclone Niran is moving southeast along the southwest coast of New Caledonia in the next few hours with very strong wind gusts above 200 km/h and high rainfall rates, as well as a strong storm surge!

06.-07.03.2021



A Category 3 tropical cyclone named Noran with winds exceeding 180 km/h is shifting southwest along the southwest coast of New Caledonia under slight weakening. Noran formed from a tropical disturbance in the South Pacific on March 2 and intensified into a Category 5 storm over the warm ocean waters as it moved southeastward in the following days. The reason for the strong intensification, despite quite high wind shear values above 8 m/s between 850 and 200 hPa, was high moisture in the lower and middle atmospheric layers, as well as very high sea surface temperatures around 30C. From 05 to 06 March, a mimimum core pressure of 930 hPa was recorded, while it weakened slightly in the last hours due to relatively high wind shear values. During the next hour, the storm will slowly move southeastward along the southwest coast of New Caledonia and will provide high damage potential due to extreme winds and high precipitation rates, as well as moderate coastal storm surge. Noran will reach an area of much colder sea surface temperatures below 26C over the next few hours, so it will continue to weaken and is expected to be downgraded to a normal tropical storm over the next 48 hours.

Issued: March 06, 2021, 18:00 UTC
NB


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