000 AXPZ20 KNHC 270240 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 0405 UTC Sat Jun 27 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 0000 UTC surface analysis and satellite imagery through 0215 UTC. ...SPECIAL FEATURES... Tropical Depression Boris is centered near 12.7N 139.9W at 27/0300 UTC moving WNW at 6 kt. Estimated minimum central pressure is 1006 mb. Maximum sustained wind speed is 30 kt with gusts to 40 kt. Scattered moderate and isolated strong convection is noted within 210 nm in the NE quadrant of Boris. Boris is in the process of crossing into the Central Pacific Ocean basin. Boris is forecast to gradually weaken and become post-tropical by Sun. Please read the latest NHC Public Advisory at https://www.nhc.noaa.gov/text/MIATCPEP3.shtml and Forecast/ Advisory at https://www.nhc.noaa.gov/text/MIATCMEP3.shtml for more details. ...TROPICAL WAVES... A tropical wave is crossing Central America with axis N of 01N along 85W, moving westward at around 10 kt. Scattered moderate and isolated strong convection is noted from 03N to 09N between 82W and 92W. A tropical wave is crossing SW Mexico with axis N of 01N along 102W, moving westward at around 10 kt. Associated convection is described below. A tropical wave is from 01N to 22N, or near the entrance to the Gulf of California, moving westward at around 10 kt. Associated convection is described below. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough axis extends from 09N76W to 10N90W to low pressure near 15.5N101W to low pressure near 15.5N108.5W to low pressure near 14N123W to 12N134W. Scattered moderate and isolated strong convection is noted N of 05N E of 80W, including the Gulf of Panama, within 16N101W to 11N96W to 11N100W to 08N109W to 11N110W to 16N101W, and from 08N to 10N between 111W and 115W. Scattered moderate convection is noted from 15N to 20N between 102W and 107W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A broad 1008 mb low pressure area is near 15.5N108.5W along a tropical wave axis. This system is expected to move west- northwestward away from the coast of Mexico during the next couple of days. A swath of fresh to strong E-SE winds and seas of 8-11 ft will parallel the coast through early Mon. Aside from the winds and seas, scattered to numerous heavy showers and tstms are expected in this region. Elsewhere, mainly gentle to moderate NW-N winds prevail offshore of Baja California. Moderate to fresh southerly winds in the Gulf of California will pulse to fresh to strong in the northern Gulf through early next week. Otherwise, little change is anticipated for the next several days. 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 the middle of next week. Wave heights will peak around 8 ft. Moderate to occasionally fresh monsoon flow will prevail over the waters S of 10N through this weekend. Looking ahead, building seas are possible W of 85W Mon through Tue night as monsoonal flow freshens across the region and SW swell propagates through the waters. REMAINDER OF THE AREA... Please see the Special Features section above for more details on Tropical Depression Boris. Moderate to fresh monsoonal flow persists south of the monsoon trough between 97W and 117W. Fresh winds and SW swell are likely producing 7-8 ft combined seas in this region. Moderate to fresh N-NE flow continues between Boris and a high pressure ridge that extends across the northern waters, with seas generally 5-7 ft. A weak low-level circulation is near 14N123W, but associated wind speeds are less than 20 kt. A set of northerly swell will spread south of 30N Sat night through early next week building seas to 7-9 ft N of 27N. Cross-equatorial southerly swell, combined with freshening monsoon flow, will build seas S of the monsoon trough and E of 120W by this weekend. Seas are building to 8-9 ft S of the Equator tonight through Sun in SW swell, then will subside on Mon. Looking ahead, another SW swell event is possible over the far southern waters Tue through Wed night. $$ Lewitsky