914 AXPZ20 KNHC 292151 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 2054 UTC Wed Aug 29 2018 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 2100 UTC. ...SPECIAL FEATURES... Hurricane Miriam centered near 14.0N 139.7W at 29/2100 UTC or 950 nm ESE of Hilo Hawaii moving W at 8 kt. Estimated minimum central pressure is 992 mb. Maximum sustained wind speed is 65 kt with gusts to 80 kt. Numerous moderate and isolated strong convection are within 120 nm of the center. Scattered moderate convection is elsewhere within 270 nm of the center. Miriam will move into the Central Pacific this evening then turn northward. See latest NHC forecast/advisory under AWIPS/WMO headers MIATCMEP5/WTPZ25 KNHC for more details. Future advisory information will be issued by the Central Pacific Hurricane Center beginning at 5 PM HST, under AWIPS header HFOTCPCP3, WMO header WTPA33 PHFO, and on the web at http://www.prh.noaa.gov/cphc. Hurricane Norman centered near 17.6N 116.1W at 29/2100 UTC or 470 nm SW of The Southern Tip Of Baja California moving W at 8 kt. Estimated minimum central pressure is 987 mb. Maximum sustained wind speed is 65 kt with gusts to 80 kt. Numerous moderate and isolated strong convection are within 120 nm of the center. Scattered moderate convection is elsewhere within 180 nm of the north semicircle and 270 nm of the south semicircle. See latest NHC forecast/advisory under AWIPS/WMO headers MIATCMEP1/WTPZ21 KNHC for more details. ...TROPICAL WAVES... A tropical wave has an axis that extends from 05N88W to 22N88W, moving westward at around 10 kt. This wave is producing little to no convection over the discussion waters at this time. A tropical wave has an axis that extends from 05N105W to 18N104W, moving westward at around 5 to 10 kt. Scattered moderate and isolated strong convection are from 10N to 15N between 99W and 109W. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough axis extends from 09N74W to 11N95W to 14N108W, then resumes west of Hurricane Norman near 14N118W to 12N130W. Aside from convection associated with the tropical waves, scattered moderate and isolated strong convection are from 04N to 09N east of 86W. Scattered moderate convection is from 08N to 13N between 90W and 97W, and within 60 nm of the monsoon trough axis between 118W and 125W. ...DISCUSSION... OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A ridge extends over the discussion waters from 30N130W to near 21N112W. The pressure gradient between the high and a trough across the Baja California Peninsula will support moderate to occasionally fresh NW winds along the coast of Baja California Norte through Fri, with seas generally between 4 to 6 ft. Winds will diminish on Sat as the pressure gradient weakens. Elsewhere, gentle to moderate winds will prevail offshore of Mexico the next several days with seas of 3 to 6 ft. Low pressure over northern Mexico will support light to gentle southerly flow over the Gulf of California the remainder of the week. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... The monsoon trough will linger along 09N/10N during the next few days. Winds on both sides of the trough axis will generally be light to moderate. The exception to this will be brief periods in the Gulf of Papagayo where nocturnal offshore gap winds will pulse to moderate to fresh. Seas of 4 to 6 feet can be expected during this time period, except increasing to 7 ft under the nocturnal Papagayo winds. REMAINDER OF THE AREA... Please see the Special Features section for information on Hurricane Miriam and Hurricane Norman. Elsewhere, the pressure gradient between ridging across the waters N of 20N and the monsoon trough will support moderate to locally fresh trades and 4 to 7 ft seas in mixed swell N of the monsoon trough and west of 120W through the remainder of the week, with seas generally ranging between 5 to 7 ft. South of the monsoon trough region, expect generally moderate to occasionally fresh winds with seas of 5 to 7 ft. $$ Latto