Cheers for thats Wolves. The SS scale is primarily for wind speed but it also takes into account the storm surge and flooding. Also it's possible one can deduce from central pressure the intesity on the SS scale. However as is the case now, this is not always accurate!! Wikipedia has a good page here on this Wikipedia Saffir Simpson page
It's an interesting quandary the different categories used by different forecasting agencies. In places such as the NW Pacific where there are so many different scales (eg created by JMA-Japan, CWB-Taiwan, PAGSA-Phillipines etc) I find the Saffir Simpson scale a good standard system to use, esp since it's the one I was taught at school! . Plus Tropical Storm Risk, which I find a very useful website, covers cyclones all over the globe and helpfully uses the SS scale to categorise all active systems regardless of basin.
What is the categorisation system for the NE Pacific? These are forecasted by JTWC which is an unofficial forecasting service as such (ie. unrecognised by the World Meteorological Org) if i'm not mistaken. Is it the Mexicans who issue official forecasts for the region? Do they have their own scale?
Thanksi