ABIO10 PGTW 201800 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE INDIAN /OCEAN/201800Z-211800ZAPR2019// RMKS/ 1. NORTH INDIAN OCEAN AREA (MALAY PENINSULA WEST TO COAST OF AFRICA): A. TROPICAL CYCLONE SUMMARY: NONE. B. TROPICAL DISTURBANCE SUMMARY: NONE. 2. SOUTH INDIAN OCEAN AREA (135E WEST TO COAST OF AFRICA): A. TROPICAL CYCLONE SUMMARY: NONE. B. TROPICAL DISTURBANCE SUMMARY: NONE.// NNNN
Cyclone names are selected in advance by the RA I Tropical Cyclone Committee of the World Meteorological Organization.
Classification of cyclones depends on the maximum continuous wind speed.
Cyclones migrating from the Australian observation area over the 90th degree of longitude are given a new name.
The other way around, they keep their name.
is, with 1 min peaks of 285 km/h, the strongest tropical cyclone measured in the southwestern Indian Ocean.
|Cyclone Classes||When they come into effect|
|Class 1||If possible 36 to 48 hours before Mauritius, gusts of up to 120 km/h are to be expected.|
|Class 2||Issued to allow, as far as practicable, 12 hours of daylight before gusts of 120 km/h occur|
|Class 3||Issued to allow, as far as possible, 6 hours of daylight before gusts of 120 km/h occur.|
|Class 4||It is issued when gusts of 120 km/h have been registered in some places and are expected.|
|Cyclone Warning Removed||It is issued when there is no longer a risk of gusts above 120 km/h.|