Current cyclones and Watching


Translations are automated.

Weather lexicon

Weather systems

  • Invest : It is a disturbed area under surveillance.
  • xxL : This is the number of the disturbed zone under surveillance (between 90L and 99L in the Atlantic).
  • TDxx: Tropical depression, it is a tropical depression and its number in the season.
  • TS : Tropical Storm, this is a named Tropical Storm.
  • Hurricane : Named hurricane.
  • Major Hurricane: Major hurricane of category 3 or higher.
  • LO : Low: it is an area of ​​low pressure.

Wind and pressure

  • kt ou kts : unit of wind (knot or nautical knot). 1 kt = 1.852 km / h. For a quick approximate calculation, multiply by 2 and subtract 10%.
  • Windshear / Shear : It is the difference between the surface wind and the altitude wind. The greater the difference, the less the risk of cyclones.
  • hPa : hectopascal, it is the unit of measurement of atmospheric pressure which replaced the milibar and which is equivalent.

Weather services and forecast models

  • NHC : It's the National Hurricane Center, the American weather forecasting service dedicated to cyclone risk. Depends on NOAA.
  • NOAA : Domestic Oceanic and Atmospheric Administration, the American service for the study of the atmosphere and the oceans
  • NRL : Naval Research Laboratory, it is the division of marine meteorology of the US Navy. NRL : Naval Research Laboratory, it is the division of marine meteorology of the US Navy.
  • GFS : Global Forecast System, It is the best known and most used global weather forecast model in the world. It runs 4 times a day (00h 06h 12h 18h UTC) and gives forecasts on a multitude of parameters up to 384h.
  • ECMWF extension : European Center for Medium-Range Weather Forecasts, it is the European equivalent of GFS. It runs twice a day (2h and 00h) and gives forecasts at 12h.
  • CMC, NAVGEM, ICON, JMA are other global digital models but less relevant than the first 2.
  • WW3 : It is a forecast model dedicated to swell and waves. : It is a forecast model dedicated to swell and waves
  • HWRF : It is a forecasting model dedicated to cyclone tracking
  • SHIPS : It is a statistical forecast model dedicated to the intensity of cyclones. It is widely used by forecasters of the NHC
  • Floater : Satellite imagery centered on a weather system.

Contact details and zoning

  • xx, xN and xx, xW : a GPS position. For example Fort-de-France is located on 14,36N by 60,03W.
  • MDR : the Major Development Zone of weather systems in the Atlantic, between 10N and 20N from Africa to Mexico.
  • ITCZ : Intertropical convergence zone. It is a very humid and disturbed barometric marsh area (pressure stable) a little north of the equator in the Atlantic.
  • S, N, SE, SW, NE, NW : These are the cardinal points that determine a direction.


  • ENSO : Southern oscillation which can have 3 types of phase: ElNiNO, THE GIRL or Neutral Phase.
  • AMO : Atlantic Oscillation Multidecenal. It takes place over several decades and is responsible for a large part of the temperature variations in the North Atlantic Ocean, which greatly impacts the hurricane situation.
  • SST : These are the ocean surface temperature anomalies. This is very important data for the intensity of cyclones over a season.

Translations are automated.

Current cyclones and Watching

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This site has been developed for entertainment and understanding the weather in the tropics.

It should only be used NEVER for the safety of people or property.

Only information from your national meteorological service and your civil security should be used in case of proven risk!