000 AXPZ20 KNHC 260844 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1005 UTC Fri Jun 26 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 0600 UTC surface analysis and satellite imagery through 0800 UTC. ...SPECIAL FEATURES... Tropical Depression Boris is centered near 11.6N 138.5W at 26/0900 UTC moving WNW at 7 kt. Estimated minimum central pressure is 1006 mb. Maximum sustained wind speed is 30 kt with gusts to 40 kt. Numerous moderate and isolated strong convection is within 180 nm in the SE semicircle of Boris. Boris is forecast to maintain strength into the weekend while crossing 140W into the Central Pacific basin. 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 axis is along 79W/80W from the western Caribbean Sea to near the Ecuador/Colombia border, moving westward at around 15 to 20 kt. Scattered moderate to strong convection is noted north of 06N east of 80W, and from 02N to 05N and east of 80W. A tropical wave axis is along 98W, moving westward at around 10 kt. Scattered moderate to strong convection is noted from 09N to 16N between 97W and 101W. A tropical wave axis is along 104W/105W with 1005 mb low pressure along the wave near 15N moving westward at around 10 kt. Scattered moderate and isolated strong convection is noted within 180 nm in the NE quadrant and 120 nm in the S quadrant of the low. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough axis extends from northern Colombia near 09N75W to 10N90W to low pressure near 15N104.5W to low pressure near 14N122W to 11N134W. Scattered moderate to strong convection is noted within 120 nm SE of a line from 08N82W to 05N88W and also within 210 nm SW of the monsoon trough between 89W and 97W. Scattered moderate and isolated strong convection is noted from 08N to 11N between 107W and 112W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A broad 1005 mb low pressure area is near 15N104.5W along a tropical wave axis. Associated convection is described above in the tropical waves section. Environmental conditions are expected to become only marginally conducive for the development of a tropical cyclone within the next couple of days while the system moves west-northwestward parallel to the coast of Mexico. Even so, a swath of fresh to strong E-SE winds and seas of 8-10 ft will parallel the coast through the weekend with conditions improving early next week. Elsewhere, mainly gentle to moderate NW-N winds prevail offshore of Baja California. Southerly winds remain gentle to moderate in the Gulf of California, east of a trough axis that extends along the Baja peninsula. The trough along the Baja peninsula will support increasing winds and seas in the Gulf of California later today through early next week. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... A band of fresh easterly winds extends from the across the Guatemala and El Salvador offshore waters. Seas are 6-9 ft in this region. Elsewhere, gentle to moderate monsoonal flow continues over the offshore waters roughly S of 08N per scatterometer data. Fresh to strong winds will pulse over and downstream of the Papagayo region through early next week. Wave heights will peak around 8 ft each morning. 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 night 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. Scatterometer data indicates moderate to fresh monsoonal flow persists south of the monsoon trough between 90W and 105W. Fresh winds and SW swell are likely producing 7-9 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 noted in scatterometer winds near 14N122W, 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 south of the monsoon trough and east of 120W by this weekend. Seas are expected to build to 8-9 ft south of the Equator today through Sun in SW swell, then subside on Mon. Looking ahead, another SW swell event is possible over the far southern waters Tue and Tue night. $$ Lewitsky