000 AXPZ20 KNHC 062101 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 2029 UTC Mon Jan 6 2020 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 2000 UTC. ...SPECIAL FEATURES... Gulf of Tehuantepec Gale Warning: High pressure centered over the northern Gulf of Mexico continues to slide east and gradually weaken, allowing a more relaxed pressure gradient over southern Mexico and for gales in the Gulf of Tehuantepec to end this afternoon. Seas of up to 12 feet will also subside this evening. Another high pressure ridge will build into northern Mexico tonight, causing gales to again develop overnight. By Tue afternoon and evening, the pressure gradient will become tight enough over southern Mexico to support near storm force northerly winds, and gale conditions should prevail into Wed night. Seas will start to exceed 12 feet again Tue morning, peak near 21 feet Wed, then diminish below 12 feet early Thu. Gulf of Papagayo: As high pressure builds southward into northern Central America, the pressure gradient will increase over Nicaragua and Costa Rica, and strong NE to E will will increase to gale force overnight Tue and continue through Wed morning. Seas Wed will peak at 12 to 13 ft. Strong winds will then prevail into the weekend. 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 on both Gale Warnings. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 1011 mb low pressure near 04N78W to 03N85W to 04N92W. The ITCZ then continues from 04N92W to 06N106W, and from 04N115W to 06N130W to beyond 06N140W. Scattered moderate convection is noted from 06N to 15N between 106W to 113W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... See the Special Features section for more details about the developing Gale Warning for the Gulf of Tehuantepec. Gulf of California: High pressure building into the SW U.S. is leading to strong NW winds in the Gulf this afternoon. These winds will continue into Tue morning before weakening. Seas will approach 8 ft during this time. Marine conditions will then be fairly tranquil until Fri, when the pressure gradient tightens and fresh to strong NW to N winds redevelop. NW swell continues to impact areas offshore Baja California Norte this afternoon, bringing seas of 8 to 10 ft. This should subside tonight. A set of N swell will arrive Wed bringing similar seas to the area until early Fri. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... See the Special Features section for more details about the developing Gale Warning for the Gulf of Papagayo. Seas of 8 to 10 ft offshore Guatemala from remnant swell generated from early gales in the Gulf of Tehuantepec will subside this evening. New swell from redeveloping Gulf of Tehuantepec gales will reenter the waters offshore Guatemala Tue evening and continue through late Wed night, potentially bringing seas of up to 12 ft. Gulf of Panama: Pulses of fresh northerly winds are expected to dominate the Gulf and waters N of 05N through Fri. Elsewhere, gentle to moderate S to SW flow will continue over the offshore waters of and S of Costa Rica through the week. REMAINDER OF THE AREA... High pressure centered remains centered just N of the area this afternoon, with a ridging extending SE to near the Revillagigedo Islands. A high pressure gradient between this ridge and the ITCZ to the south is leading to fresh to strong tradewinds W of 120W. Seas of 8 to 11 ft will also prevail in this area. Some seas in excess of 12 ft are possible by Thu night as pressure lowers in association with the ITCZ. Meanwhile, northerly swell to the E of 125W and N of 25W this afternoon is leading to seas of up to 10 ft. These seas will persist through tonight. New swell will arrive in the same area Wed and continue until Fri, likely bringing 8 to 10 ft seas to the region. $$ KONARIK