We issue forecasts only for named tropical storms over the North Atlantic Basin, whose (forecasted) maximum surface winds are above 34 knots (17.5 m/s) before transitioning to extra-tropical cyclones. 

Currently, three types of forecasts are provided:  (i)  Probability of maximum surface winds, (ii) Radial profile of surface winds, and (iii) Probability of gale-force or stronger winds.
 
Please click here for more information about the algorithm.