981 AXPZ20 KNHC 010922 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 712 UTC Sat Sep 1 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 0600 UTC surface analysis and satellite imagery through 0900 UTC. ...SPECIAL FEATURES... Hurricane Norman is centered near 16.3N 123.0W at 01/0900 moving W or 265 degrees at 7 kt. Estimated minimum central pressure is 966 mb. Maximum sustained wind speed is 95 kt with gusts to 115 kt. Gradual weakening is forecast to continue today. Little change in intensity is expected beginning Sunday through early next week. Numerous moderate and scattered strong convection is seen within 60 nm NE and 90 nm SW semicircles of center. Numerous moderate convection is noted elsewhere from 14N to 17N between 121.5W and 125W. See latest NHC forecast/advisory under AWIPS/WMO headers MIATCMEP1/WTPZ21 KNHC for more details. Tropical Depression Seventeen-E is located near 14.7N 109.3W at 01/0900 UTC moving W-NW or 285 degrees at 7 kt. The depression's center may move erratically or re-form over the next day or so, but overall it should move toward the west-northwest at a slower speed through Sunday night. A westward motion is expected Monday and Tuesday. Estimated minimum central pressure is 1007 mb. Maximum sustained wind speed is 30 kt with gusts to 40 KT. Little change in strength is expected today, but strengthening should begin by Sunday. The depression could become a tropical storm any time during the next couple of days. Numerous moderate and isolated strong convection is noted from 13N to 15N between 109W and 113W. Scattered to numerous moderate convection is elsewhere from 11N to 15N between 109W and 113W. See latest NHC forecast/ advisory under AWIPS/WMO headers MIATCMEP2/WTPZ22 KNHC for more details. ...TROPICAL WAVES... A tropical wave is along 100W N of 06N moving west at 5 to 10 kt. Convection is limited near the wave axis. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough axis extends from 10N85W to 09N93W to 13N104W. Scattered moderate to isolated strong convection is noted from 06N to 09N between 90W and 98W. Similar convection is from 08N to 11N between 102W and 106W. ...DISCUSSION... OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A surface trough is forecast to meander between the Gulf of California and the Baja California Peninsula through at least Mon while currently T.D. Seventeen-E is forecast to remain to the south of a weakness in the subtropical ridge. Based on this weather pattern, this tropical cyclone is expected to remain close to the offshore forecast waters through at least Mon evening. Swell generated by this system will spread across the offshore forecast waters through the forecast period. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... The monsoon trough will linger near 10N the next few days. Winds on both sides of the trough axis will be gentle to moderate, and seas of 4 to 6 feet are expected through Sunday. REMAINDER OF THE AREA... Another Tropical Depression has formed in the Eastern Pacific basin named T.D. Seventeen-E. West of this Tropical Depression is Hurricane Norman. Please, see Special Features section for details. Hurricane Miriam is W of area near 20.9N 141.2W at 01/0900Z but it is still producing winds in the 20 to 30 kt range and seas of 10 to 16 ft across the forecast waters from 19N to 26N W of 138W. Otherwise, a ridge dominates the forecast waters N of 20N W of 120W. Swell generated by the above mentioned tropical cyclones will produce seas of 8 ft or greater across much of the waters W of 110W through late Sun. $$ GR