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Forecast verification

Individual tropical cyclone forecast tracks

Individual charts of all tropical cyclones from the last few years are available here. Select the appropriate link and all individual tropical cyclones in that season will be listed. Select the name to see a chart of the observed track together with 24-hourly forecast tracks from the Met Office global model. The maximum forecast range of the global model is five days.

Observed positions are taken from real time advisories from tropical cyclone warning centres. Forecast tracks are only produced for cyclones which reach tropical storm strength (winds greater than 34 knots). This page is updated approximately once a month usually during the first week of the month. For information on current tropical cyclones go to the tropical cyclone warnings and guidance page.

 
Observed and forecast tracks
Northern hemisphere
2008 2007 2006 2005 2004 2003
Southern hemisphere
2007-8 2006-7 2005-6 2004-5 2003-4 2002-3

Monthly verification

Since January 1993 the Met Office has issued a document entitled "Monthly Summary of Tropical Cyclone Activity and Forecasts" which is sent to many individuals and meteorological centres around the globe with an interest in the forecasting of tropical cyclones. It contains information on the month's tropical cyclone tracks and statistics and charts relating to the performance of the Met Office global model in forecasting the track of each storm. Editions for the last few years are included below.

 
Monthly summary of tropical cyclone activity and forecasts
2008 2007 2006 2005 2004 2003
January January January January January January
February February February February February February
March March March March March March
April April April April April April
May May May May May May
June June June June June June
July July July July July July
August August August August August August
September September September September September September
October October October October October October
November November November November November November
December December December December December December

June and December bulletins contain preliminary summaries of the southern and northern hemisphere seasons respectively.

Seasonal verification

At the end of each tropical cyclone season a report is published summarising all tropical cyclone activity together with forecast verification statistics.

 
Seasonal tropical cyclone activity and forecasts
Northern hemisphere
2007 2006 2005 2004 2003 2002 2001
2000 1999 1998 1997 1996 1995
Southern hemisphere
2007-8 2006-7 2005-6 2004-5 2003-4 2002-3 2001-2
2000-1 1999-2000 1998-9 1997-8 1996-7 1995-6 1994-5

 

Forecast error graphs

Graphs of mean forecast positional errors since 1988, when track verification records began, are shown below.

Forecast error graphs



 

Tropical cyclone forecast track verification method

Method used to verify the forecast tracks of tropical cyclones in the Met Office global model.

Verification of forecast tracks appendix