Important information

These are summaries of advisories issued by the various meteorological organisations around the world regarding active tropical cyclones. They are intended to raise awareness to areas where a cyclone may strike. The bulletins are written to contain a minimum of specialist meteorological terminology. Updates are provided as soon as possible, but may follow the official bulletins by hours.Information on track and forecast should be obtained from the RSMC for the area in which the tropical system occurs. Links to various agencies are provided.

This site is maintained from Western Europe, meaning that any updates issued by weather agencies between the hours of 2100 GMT and 0900 GMT tend not to be reflected.

ALWAYS CHECK THE WEBSITES OF THE REGIONAL SPECIALISED METEOROLOGICAL CENTRES FOR THE MOST UP TO DATE INFORMATION. 

YOUR LIFE MAY DEPEND ON IT.

LEGALISTICS
1. The webmaster is not trained in matters meteorological, but takes an active interest in tropical cyclones. No responsibility can therefore be taken for the consequences of any actions resulting from information relayed on this site.

2. The tropical cyclones logo is linked from Wikimedia, and is in the public domain.

3. The video is copyright NOAA, and consent for its use on this site has been obtained from that organisation.

INFORMATION
The information on tropical weather systems, whether disturbances or actual cyclones, is given with abbreviations.

Directions are quoted as angles (in degrees) and their corresponding compass points:
N = North
E = East
S = South
W = West

Times are given in Greenwich Mean Time (GMT), which is the same as Universal Time Coordinated (UTC).

Distances are given as miles, meaning nautical miles.
1 nm = 1.852 km
1 knot = 1 nm / hour

The strength of tropical cyclones is given as follows:

Tropical depression = maximum sustained windspeeds 30 knots or lower
Tropical storm = maximum sustained windspeeds 35 to 60 knots
Hurricane / typhoon / tropical cyclone = maximum sustained windspeeds 65 knots or higher

Please note that southern hemisphere systems are named as Tropical cyclones, irrespective of strength.

TROPICAL DISTURBANCES
NHC often highlights areas of disturbed weather in its area of responsibility before the system in question is formally recognised as an Invest. These are listed in the bulletins, with the system designation marked in italics as: No Invest Assigned. The corresponding label is NIA followed by a letter according to the basin where it occurs:
A = Atlantic
E = Eastern Pacific
C = Central Pacific

Updated May 2022