000 AXPZ20 KNHC 120925 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1005 UTC Fri Apr 12 2019 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 0915 UTC. ...SPECIAL FEATURES... Gulf of California Gale Warning: Near gale to gale force SW to W gap winds are over the northern Gulf from 29.5N to 30.5N due to funneling through passages of the mountainous terrain of Baja California Norte. The duration and fetch of the gap winds will be sufficient to support seas to 8 ft along 30N this morning. Winds will quickly subside after sunrise. Please see the latest High Seas Forecast issued by the National Hurricane Center under AWIPS/WMO headers FZPN03 KNHC/HSFEP2 or at website https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml for further details. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... A surface trough extends from 08N82W to 06N98W. The intertropical convergence zone continues from 06N98W to 06N114W to 03N127W to 03N140W. Scattered moderate showers and thunderstorms are active from 04N to 08N between 89W and 96W, and from 06N to 10N between 105W and 116W. ...DISCUSSION... OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Strong 1039 mb high pressure NW of the region maintains a broad ridge extending SE along the outer Baja California offshore waters to the Revillagigedo Islands. A tight pressure gradient between the ridge and a low pressure center over Arizona support strong to near gale force NW winds over the offshores of Baja California Norte, continuing through Fri evening. These winds will be accompanied with seas of 8 to 15 ft. Winds and seas will diminish and subside into Sun as the high pressure weakens and moves westward. More tranquil marine conditions are anticipated for Mon and Tue. Gulf of California: Please see the Special Features section above for information about the gale warning in effect for the northern Gulf of California this morning. Gulf of Tehuantepec: Gentle to moderate onshore winds will prevail across the Gulf of Tehuantepec region through Sun evening. Looking ahead, the next significant northerly gap wind event is expected Sun night into Mon as strong to gale force N winds develop over the Gulf as a ridge builds over the western Gulf of Mexico in the wake of a cold front. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Gulf of Papagayo: Light to moderate will prevail across the Gulf and offshore waters through Sun evening with seas in the 3 to 5 ft range. Fresh to strong NE to E winds are expected across the Gulf Mon and Tue as high pressure builds N of the area. The increasing winds will build seas to 5-7 ft. Gulf of Panama: Light to gentle wind will prevail across the area through Fri night when winds will increase to moderate in response to high pressure building N of the area. Seas will generally remain in the 4-6 ft range during the entire period. Elsewhere, light to gentle winds will persist the next several days. Wave heights between Ecuador and the Galapagos Islands will generally remain 5-7 ft through Fri in long period SW swell. Further offshore, seas will peak around 8 ft tonight through Fri night over the waters SW of the Galapagos Islands. REMAINDER OF THE AREA... Strong high pressure extends a ridge axis across the northern waters from a 1039 mb high pressure centered NW of the region near 36N143W. Fresh to strong trades prevail N of 10N and W of 120W as well as peak seas of 10-13 ft in mixed NE wind waves and long period NW swell. Elsewhere, fresh trade winds prevail S of 10N to near the ITCZ. A tight pressure gradient S and SE of the ridge will persist through this evening, before the ridge begins to weaken slightly and drift W into the remainder weekend. Seas will remain 12 ft or greater W of 130W into Fri, with seas of 8 ft or greater primarily in NW swell extending to 110W finally subsiding through early next week. Elsewhere, 7-9 ft seas are S of 11N between 95W and 120W in mixed SW and NW swell. These seas will subside during the next several days, except S of the equator where reinforcing southerly swell will help to keep heights in the 7-9 ft range. Much more tranquil marine conditions are anticipated for early next week. $$ NR