336 
            
            axpz20 knhc 210931
            
            twdep 
            
            

            
            Tropical weather discussion
            
            NWS TPC/National Hurricane Center Miami FL
            
            1005 UTC Sat Nov 21 2009
            
            

            
            Tropical weather discussion for the eastern Pacific Ocean from 
            
            the Equator to 32n...east of 140w. 
            
            

            
            Based on 0600 UTC surface analysis and satellite imagery through 
            
            0915 UTC.
            
            

            
            ...ITCZ...
            
            the ITCZ axis extends from 05n76w to 04n82w to 07n95w to 06n108w 
            
            to 08n123w to 07n140w. Scattered moderate to isolated strong 
            
            convection within 200 nm N of axis and 120 nm S of axis W of 
            
            118w. 
            
            

            
            ...Discussion...
            
            

            
            W of 115w...
            
            deep layer trough is now over the western US. Cold front extends 
            
            from low pressure over S Nevada across S California toward the 
            
            central portion of the forecast area N of 28n. High pressure 
            
            1028 mb centered near 34n150w as depicted in 05z Quikscat pass. 
            
            This feature will shift to a position N of the forecast area 
            
            today through tonight...where it will remain through at least 
            
            the beginning of next week. The location of this high pressure 
            
            center will maintain fresh to strong trades from 08n to 24n W of 
            
            117w. While the primary swell direction will continue from the 
            
            NW...NE winds will generate wind waves that mix with the NW 
            
            swell. The strongest trades will be from 14n to 18n W of 135w 
            
            which will produce combined seas of 12 ft. The strongest region 
            
            of low level confluence in the ITCZ is W of 118w where moderate 
            
            to fresh se winds S of the ITCZ converge with fresh to locally 
            
            strong NE trades N of the ITCZ...which has resulted in more 
            
            active convection.   
            
            

            
            E of 115w...gap winds will continue through the weekend and 
            
            produce 20 kt to occasional 25 kt winds in the Gulf of fonseca 
            
            and papagayo...with the stronger winds in the overnight and 
            
            morning hours due to drainage flow enhancing the winds. As 
            
            indicated in the latest scatterometer passes...winds have 
            
            diminished over the Gulf of Tehuantepec. Winds will pick up 
            
            again today as winds behind the cold front in the Gulf of Mexico 
            
            flow through the pass. Fresh tradewinds will continue to flow 
            
            through the Gulf of Panama for the next 24 hours...then will 
            
            diminish.   
            
            

            
            $$
            
            

            
            Al