000 AXPZ20 KNHC 062207 CCA TWDEP Tropical Weather Discussion...Corrected NWS National Hurricane Center Miami FL 2205 UTC Fri Mar 6 2020 Corrected Remainder of the Area 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 1800 UTC surface analysis and satellite imagery through 2145 UTC. ...SPECIAL FEATURES... Gulf of Tehuantepec Storm Warning: The very tight tight pressure gradient between strong high pressure ridging southward across eastern and central Mexico and relatively lower pressure south of Mexico is allowing for strong gale force north to northeast winds to surge southward over the Gulf of Tehuantepec. A couple of ship observations from earlier today suggested these wind speeds as well. These winds are forecast to attain storm force this evening and continue into Sat morning at those speeds. The culprit high pressure is forecast to slowly weaken as it slides eastward through Mon allowing for these diminish back to strong gale force on Sat and continuing at strong gale force on Sun before diminishing to minimal gale force early on Mon. Peak wave heights will reach about 21 ft tonight into Sat, then gradually subside into early Mon. The wave heights generated by this ongoing storm force wind event will combine with those originating from the Papagayo region, and propagate far downstream from the individual source regions. Please read the latest High Seas Forecast issued by the National Hurricane Center under AWIPS/WMO headers FZPN03 KNHC/HSFEP2 or at website https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml for further details. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... A surface trough extends from 07N78W to 04N88W to 04N96W, where scatterometer data indicates it transitions to an ITCZ, which then continues to 05N110W and to 09N125W, where it is bisected by a trough that stretches from 14N125W to 08N128W and to 03N129W. The ITCZ resumes at 06N131W and to beyond the area at 04N140W. Scattered moderate convection is within 180 nm north of the ITCZ between 131W and 134W, and also within 30 nm of the ITCZ between 85W and 88W. Scattered moderate convection is within either side of trough that bisects the ITCZ from 06N to 09N, and also within 120 nm east of trough from 11N to 14N. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Please see Special Features section above for details on an ongoing Gulf of Tehunatepec storm wind event. A weak pressure pattern is supporting light to moderate winds across Mexico offshore waters, with the notable exception of a Gulf of Tehuantepec gale wind event. Strong southwest winds will affect the Gulf of California north of 30N Sat night and Sun as a weakening cold front moves onshore. Large long-period northwest swell should impact the waters west of Baja California from Sun through at least Tue night. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Gulf of Papagayo: A north to south pressure gradient across Central America is resulting in strong northeast winds across and offshore the Papagayo region. These winds are expected to reach near gale force Sun night into Mon, with some potential for them to acquire gale force speeds. Wave heights with these winds are expected to be in the range of 8-11 ft. Gulf of Panama: The same pressure pattern affecting the Gulf of Papagayo region will also force fresh to strong north to northeast winds over the Gulf of Panama for the next several days. Wave heights with these are expected to reach about 9 or 10 ft. A Gulf of Tehuantepec gap wind event will lead to large west to northwest swell to propagate through the waters west of Guatemala and El Salvador for the next several days. REMAINDER OF THE AREA... A ridge of high pressure extends from a 1021 mb high centered at 29N156W southeastward to near 15N104W. The rather weak equatorward pressure gradient is presently allowing for only gentle to moderate northeast trades north of the ITCZ. Long- period north swell combined with weak wind waves are producing seas 8 to 10 ft between 07N and 11N west of 125W. Large swell propagating downstream from gap winds over the Gulfs of Tehuantepec and Papagayo will expand and merge, to encompass most of the waters south of 13N between 90W and 110W by late Sun. A cold front over the far northwest corner of the area is followed by strong north to northeast winds and waveheights of 8-10 ft. This front will weaken as it moves westward north of 25N and dissipate by Sun. A stronger cold front will also reach the northwest corner of the area on Sun with both strong southwest winds and and strong to near gale northwest winds behind the front. Along the front, an intense low pressure system will develop near 30N130W early Mon. Strong winds and wave heights expected to build to 16-18 ft could impact the waters north of 20N and west of 130W as the attendant cold front pushes southeastward. $$ Aguirre