424 AXPZ20 KNHC 281604 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1605 UTC Mon Dec 28 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 1200 UTC surface analysis and satellite imagery through 1500 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from near the Colombia-Panama border at 08N78W to 09N84W to 05N103W. The ITCZ continues from 05N103W to 08N115W to beyond 08N140W. Scattered moderate convection is noted from 06N to 09N between 120W to 135W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Strong to near-gale N gap winds pulsing into the Gulf of Tehuantepec will diminish on Tue as high pressure north of the area weakens. The next gap wind event will return by Sat as a cold front moves through the Gulf of Mexico. This may produce gale-force N winds over the Gulf of Tehuantepec on Sat and Sun. Farther north, a cold front extends from 30N119W to 25N128W. Winds are likely only moderate to fresh on either side of frontal boundary in the Mexican offshore waters. However, low pressure over the SW United States is inducing some SW strong winds over the N Gulf of California today. Strong NW winds are also possible over the Gulf of California from Tue night through Wed night as the cold front sweeps southward across the area. Peak seas are likely to reach 4-6 ft in the N Gulf of California and 6-8 ft in the central and S Gulf of California. Very large NW swell of near 15 ft will move into the waters west of Baja California later today and will gradually diminish through Thu. On Thu night or Fri another large NW swell event peaking near 12 ft will again reach the waters west of Baja California. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, and WITHIN 750 NM OF ECUADOR... Fresh to strong NE gap winds will pulse across the Gulf of Papagayo region through Tue as high pressure remains in place over the W Caribbean. Peak seas are reaching 8-9 ft. Elsewhere winds and seas will be quiescent through at least Fri night over the Central American and equatorial waters. REMAINDER OF THE AREA... A cold front extends from 30N119W to 25N128W. Overnight scatterometer data indicated NW strong winds north of the front west of 120W. These NW strong winds should diminish by Tue. The next cold front should reach the N border Thu night, but winds associated with it should remain below gale force. Associated with the frontal boundary, peak seas are 15-17 ft as observed by an altimeter pass around 0630Z last night near 30N133W. These very large NW swell will be continue across the 30N border east of 132W today and Tuesday before diminishing through Thu. Another very large NW swell event peaking around 18 ft may reach the NW corner of our waters beginning on Fri. Elsewhere ridging extends from a 1027 mb high at 31N141W east- southeastward to 22N115W. The pressure gradient between the ridge and the ITCZ to the south are producing NE to E fresh to strong trades. These will increase and become more extensive through Thu as the ridge strengthens. $$ Landsea