000 AXPZ20 KNHC 212156 CCA TWDEP Tropical Weather Discussion...Corrected NWS National Hurricane Center Miami FL 1605 UTC Thu May 21 2020 Corrected Offshore Waters Within 250 nm of Mexico section Tropical Weather Discussion for the eastern Pacific Ocean from the Equator to 32N, east of 140W. The following information is based on satellite imagery, weather observations, radar, and meteorological analysis. Based on 1200 UTC surface analysis and satellite imagery through 1545 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...Updated The monsoon trough axis extends from a 1008 mb low over northwestern Colombia southwestward to the coast at 07N78W and continues to 11N90W to 10N100W to 12N106W to 10N115W to 11N125W and to 08N131W, where overnight scatterometer data indicates that it transitions to the ITCZ and continues to beyond the area at 08N140W. Scattered moderate to isolated strong convection is within 240 nm south of the trough between 86W-90W, also within 180 nm south of the trough between 101W-106W and between 107W- 110W. Similar convection is within 60 nm north of the trough between 112W-114W. Scattered moderate convection is noted within 120 nm south of the trough between 120W-124W, and within 60 nm south of the trough east of 79W to along the coast of Colombia and also within 60 nm north of the trough between 116W-119W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO...Corrected A ridge extends from a 1029 mb high pressure center that is located well north of the area near 38N144W southeastward to south of Los Cabos. A tight pressure gradient is still in place between this ridge and 1009 mb low pressure centered over the lower Colorado River valley in Arizona. Overnight ship observations indicated fresh to strong northwest to north winds still evident off Baja California Norte. A recent altimeter satellite pass indicated that wave heights are in the 8-9 ft range. The tight pressure gradient is presently loosening up allowing for winds offshore Baja California to diminish to fresh speeds. Wave heights will briefly subside to below 8 ft tonight, but build again to 8-9 ft late Fri night in a south to southwest swell component. Farther south, smoke from agricultural fires in southern Mexico may be reducing visibility slightly over the coastal waters south of Cabo Corrientes. Looking ahead, another trough moving through Baja California may allow for strong southwest gap winds into the northern Gulf of California Fri night into early Sat. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Light to gentle winds persist off Central America, with gentle to moderate southwest winds farther south off Colombia and Ecuador. Wave heights are in the 4-6 ft due to a southwest swell. The active monsoon trough will lead to moderate southwest winds along with scattered showers and thunderstorms over the offshore waters of southern Central America and Colombia through Sat. Elsewhere, generally gentle to moderate breezes will continue through the next few days. REMAINDER OF THE AREA... A high pressure ridge extends from strong high pressure located well north of the area near 38N144W to southeastward to near Los Cabos. The gradient between the ridge and lower pressure near and in the monsoon trough/ITCZ region is allowing for fresh northeast to east trade winds are noted from the monsoon trough/ITCZ north to about 20N. Overnight altimeter satellite passes indicated wave heights to near 8 ft, mainly between 10N and 20N west of 120W. These wave heights are mainly due to southerly swell with shorter-period wind waves from moderate to fresh trade winds. A weak low pressure moving west-northwest is along the monsoon trough, near 10N130W. Showers and thunderstorms have diminished a bit across the deep tropics west of 120W, although clusters of scattered showers and thunderstorms are most readily observed along and near the monsoon trough between 107W-115W and between 101W-106W. This activity lies underneath an elongated W to E anticyclone that is acting as an exhaust mechanism for the deeper convection. Wave heights are expected to subside below 8 ft by Fri as the various swell components decay, although seas peaking to 9 ft may occur in fresh or even locally strong winds near the weak low that is analyzed at 10N130W as mentioned above. $$ Aguirre