000 AXPZ20 KNHC 282208 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 2136 UTC Sun Jun 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 1800 UTC surface analysis and satellite imagery through 2130 UTC. ...SPECIAL FEATURES... Gulf of California Gale Warning: Fresh to strong southerly winds in the northern Gulf of California will become more out of the SW and increase to minimal gale force this evening into early Mon. Seas are forecast to build to 9 ft by early Mon, subsiding thereafter as winds diminish back to fresh to strong. Winds will continue to diminish through mid-week. Please read the latest High Seas Forecast issued by the National Hurricane Center at website https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml for further details. ...TROPICAL WAVES... A tropical wave is crossing Panama and extends southward to 03N with axis near 78W, moving westward at 10-15 kt. Scattered moderate convection is N of 03N E of 87W. A tropical wave is N of 03N with axis near 93W, moving westward at 10-15 kt. Scattered moderate convection is N of 04N between 90W and 100W. A tropical wave extends from 04N to 20N with axis near 131W, moving westward at around 15-20 kt. There is no significant convection associated with this wave. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough axis extends from 08N84W to 08N97W to a 1006 mb low pressure near 17N109W to a 1006 mb low pressure near 17N115W to 09N140W. Aside the convection associated with the tropical waves, and a the low pressures, scattered moderate convection is noted from 05N to 12N between 116W and 131W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Please read the Special Features section for more details about a developing gale warning in the Gulf of California. A 1006 mb low pressure area is near 17N115W. This low will continue to move W-NW away from Mexico while weakening. Another 1006 mb low is centered near 17N109W, which is expected to take a similar path to the first low. A swath of fresh to near gale force E-SE winds and seas of 8-11 ft will parallel the coast of SW Mexico through early Mon, and the Baja California Sur offshore waters through Tue night. Elsewhere, mainly gentle to moderate onshore winds will prevail off the central and northern Baja California Peninsula. Winds offshore from Punta Eugenia to 25N may increase to moderate to locally fresh Tue night as the pressure gradient tightens slightly. Otherwise, the next gap wind event in the Gulf of Tehuantepec is forecast to start Fri evening. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Fresh to locally strong winds will pulse over and downstream of the Papagayo region through Wed. These winds may assist in the development of broad low pressure by mid-week which will shift W-NW of the area toward the end of the week. Seas will build to 7-9 ft with the pulsing winds and low pressure area. Moderate to occasionally fresh monsoon flow will prevail over the waters S of 10N through early week. Long period southerly swell reach this same area helping to build seas to 6-8 ft. REMAINDER OF THE AREA... A ridge axis extends from 30N140W E-SE toward 24N123W. Mainly moderate to locally fresh N-NE flow prevails between 140W and a pair of 1006 mb low pressures located near 17N109W and 17N115W. Seas in this region are in the 5-7 ft range. Moderate to fresh monsoonal flow persists south of the monsoon trough between 100W and 130W helping to support 7-9 ft seas. Long period southerly swell of 7-9 ft extends in this same area from south of the equator. A set of northerly swell spreads south of 30N building seas to 7-9 ft N of 27N. The swell will prevail through the early part of the week before subsiding. Then a new set will arrive by Tue building seas to 7-9 ft S of 05N between 105W and 140W by mid- week. $$ Ramos