000 AXPZ20 KNHC 040247 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 0405 UTC Fri Jun 4 2021 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 0300 UTC. ...SPECIAL FEATURES.... Tropical Depression Blanca is centered near 15.7N 114.6W at 04/0300 UTC moving W at 3 kt. Estimated minimum central pressure is 1006 mb. Maximum sustained wind speed is 25 kt with gusts to 35 kt. Blanca remains a sheared tropical depression with scattered moderate convection between 90 and 180 nm in the northeast quadrant. Blanca is forecast to become a remnant low early Fri, and to dissipated by late Sun. Please read the latest NHC Public Advisory at https://www.nhc.noaa.gov/text/MIATCPEP2.shtml and Forecast/ Advisory at https://www.nhc.noaa.gov/text/MIATCMEP2.shtml for more details. ...TROPICAL WAVES... The axis of tropical wave is entering the basin near 79W, from 03N northward across eastern Panama, moving westward at around 5-10 kt. No significant convection is associated with this tropical wave over the water. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough axis extends from 09N84W to 09N130W. The ITCZ continues from 09N130W to beyond 08N140W. Scattered moderate convection is observed from 09N to 12N between 95W and 105W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Please see the Special Features section above for details on Tropical Depression Blanca located south of Clarion Island. Elsewhere, a weak ridge dominates the waters west of Baja California producing gentle to locally moderate NW-N winds with seas of 4-6 ft in mixed long period swell, reaching near 7 ft off Clarion Island due to swell from Blanca. Light and variable winds and 5 to 7 ft seas in SW swell are noted elsewhere across the offshore waters of Mexico. For the forecast, the weak ridge west of Baja California will maintain mainly light to gentle NW to N winds across the offshore waters of Baja California for the remainder of the week, increasing somewhat this weekend into early next week. Mainly light to gentle southerly winds will prevail in the Gulf of California, pulsing to moderate in the northern Gulf, and increasing there to fresh to strong Fri night and Sat night. Seas may build in northerly swell across the waters north of Punta Eugenia by late Sun or Sun night. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, and WITHIN 750 NM OF ECUADOR... Moderate offshore winds prevail in the Papagayo region. Gentle to moderate winds are elsewhere north of the monsoon trough, with moderate southerly flow south of the monsoon trough. Seas are in the 4-7 ft range in a moderate southerly swell. For the forecast, winds will pulse to moderate to fresh in the Papagayo region through Sat, then will pulse to moderate thereafter. Gentle to moderate winds will prevail elsewhere, increasing to moderate to fresh south of the monsoon trough late this weekend into early next week. Seas will gradually subside to 3-6 ft across the offshore waters by Fri through the upcoming weekend, then will then build to 4-7 ft south of the monsoon trough early next week as winds freshen there. REMAINDER OF THE AREA... Please see the Special Features section above for details on Tropical Depression Blanca. A weak and broad ridge across the waters north of 20N is supporting gentle to moderate trades across the open waters outside of Blanca. Seas are in the 5-7 ft range across the open waters. For the forecast, little change in marine conditions is expected as weakening Blanca moves toward the west within the trade wind flow. A set of fresh northerly swell is forecast to propagate into the forecast waters north of 25N between 120W and 135W by the end of the weekend into early next week, potentially building seas there to 7-9 ft. $$ Christensen/Lewitsky