208 AXPZ20 KNHC 011634 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1537 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 1200 UTC surface analysis and satellite imagery through 1545 UTC. ...SPECIAL FEATURES... Hurricane Norman is centered near 16.2N 123.7W at 01/1500 UTC moving W or 270 degrees at 10 kt. Estimated minimum central pressure is 970 mb. Maximum sustained wind speed is 90 kt with gusts to 110 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 90 nm of the center. Numerous moderate and scattered strong convection is noted elsewhere from 13N to 19N between 121W and 126W. See latest NHC forecast/advisory under AWIPS/WMO headers MIATCMEP1/WTPZ21 KNHC for more details. Tropical Depression Seventeen-E is located near 14.9N 110.0W at 01/1500 UTC moving WNW or 285 degrees at 8 kt. Estimated minimum central pressure is 1007 mb. Maximum sustained wind speed is 30 kt with gusts to 40 kt. Slow strengthening is forecast over the next few days, and the depression is expected to become a tropical storm later today. Numerous moderate and scattered strong convection is found in the W quadrant within 180 nm. Scattered moderate and isolated strong convection is observed elsewhere within 240 nm of the center and from 16N to 23N between 103W and 108W. 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. Scattered moderate and isolated strong convection is taking place from 09N to 14N between 97W and 103W. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough axis extends from 08N77W to 10N97W to 13N105W then resumes from 12N127W to 11N133W to 12N139W. Scattered moderate and isolated strong convection is noted within 120 nm either side of a line from 07N77W to 14N95W and from 08N to 11N between 127W and 140W. ...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 as T.D. Seventeen-E remains S of a weakness in the subtropical ridge. Based on this weather pattern, the tropical cyclone would pass 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... See the Special Features section for details on Hurricane Norman and Tropical Depression 17E. Hurricane Miriam is centered W of area near 22.2N 141.3W at 01/1500Z but it is still producing winds in the 20 to 25 kt range and seas of 10 to 12 ft for the forecast waters from 21N to 23N W of 139W. Otherwise, a ridge dominates the forecast waters N of 20N W of 120W. Swell generated by the above mentioned tropical cyclones will produce a large area of seas of 8 ft or greater across much of the waters N of 10N and W of 110W through late Mon. $$ CAM