000 AXPZ20 KNHC 200808 CCA TWDEP Tropical Weather Discussion...Corrected NWS National Hurricane Center Miami FL 0405 UTC Wed Apr 20 2022 Corrected Offshore Waters within 250 nm of Mexico section Tropical Weather Discussion for the eastern Pacific Ocean from 03.4S to 30N, east of 120W including the Gulf of California, and from the Equator to 30N, between 120W and 140W. The following information is based on satellite imagery, weather observations, radar, and meteorological analysis. Based on 0000 UTC surface analysis and satellite imagery through 0345 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... A surface trough extends from a 1010 mb low over northwest Colombia near 10N74W to 08N79W and continues to 05N90W to 06N100W to 05N112W to 08N120W to low pressure of 1012 mb near 10N132W and to 07N136W, where latest scatterometer data indicates that it transitions to the ITCZ to beyond 06N140W. Scattered moderate convection is seen within 60 nm north of the trough between 103W-107W and within 30 nm of the trough between 84W-86W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO...Corrected The combination of high pressure that is present over the waters west of Baja California with relatively lower pressure over Mexico supports a tight gradient between Baja California Norte and 120W. This is leading to fresh to strong NW winds across the offshore waters of Baja California, especially N of 28N E of 118W. Seas associated to these winds are in the 5-7 ft range. Gentle to moderate SE-S winds prevail in the Gulf of California. The earlier fresh to strong N winds in the Gulf of Tehuantepec have become moderate W to NW winds, with seas of 5-7 ft. Areas of haze are offshore the coast of Mexico south of Cabo Corrientes due to nearby persistent agricultural fires. For the forecast, fresh to locally strong NW to N winds will prevail offshore Baja California and N of Cabo San Lazaro through Wed night, then mainly moderate to fresh winds are expected the for the rest of the week. Long period NW swell, associated with a strong low pressure system, will reach the offshore waters of Baja California N of Punta Eugenia on Fri, building seas of up to 12 ft near 30N120W by Fri evening. This swell event will continue to propagate southeastward reaching the Revillagigedo Islands by Sat evening. At that time, seas of 8-11 ft are expected across the entire offshore forecast waters of Baja California. Winds will gradually veer to the W and NW across the Gulf of California Fri through Sat and change little Sun and Sun night. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, and WITHIN 750 NM OF ECUADOR Moderate to fresh NE to E winds are noted in the Papagayo region to about 87W based on scatterometer data. Gentle to moderate S to SW winds are seen S of the above mentioned surface trough, with W to NW winds to its N. Seas are 4-6 ft due to a S to SW swell. Patchy areas of haze are possible over the offshore waters of Guatemala and El Salvador due to nearby persistent agricultural fires. For the forecast, moderate to fresh winds will pulse in the Papagayo region tonight through Wed morning. Long-period SW swell will continue to propagate across the region, with a new set of southerly swell reaching the waters between Ecuador and the Galapagos Islands on Fri. This swell event will reach the coast of Central America by Fri night. REMAINDER OF THE AREA A high pressure ridge over the northern waters that is anchored by a 1022 mb high center near 26N139W is controlling the weather regime over the waters mainly N of 15N and W of about 119W. A 1010 mb low is analyzed near 10N132W. The gradient between the low and the ridge is allowing for moderate to locally fresh winds to exist on the NW quadrant of the low along with seas of 5-7 ft. Elsewhere, the gradient associated to the high pressure is maintaining generally moderate NE trade winds over much of the tropical eastern Pacific waters, with the exception of light to gentle winds near the high center and the ridge. Seas elsewhere are in the 5-7 ft range, except in the extreme NW corner of the area where 8-9 ft seas there mark the leading edge of a pulse of long-period NW swell. This swell was generated by a distant and complex low pressure system. For the forecast, the low pressure near 10N132W will continue to track in a westward motion tonight, weaken to a trough late Wed night, and dissipate Thu. The aforementioned long-period NW swell will propagate southeastward across the forecast waters on Wed. The NW swell will grow seas to large status by Thu night, at which time the wave heights are forecast to be in the 12-16 ft range over the NW part of the area. A rather weak cold front just out ahead of the NW swell will move across the northern waters Wed through Thu. It is expected to be followed by moderate to fresh NW winds south of 30N, but with fresh to strong NW winds north of 30N. $$ Aguirre