000 AXPZ20 KNHC 220902 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 819 UTC Fri Dec 22 2017 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 FEATURE... ...Eastern Pacific Ocean Gale-Force Winds... A 1007 mb extratropical low at 22N149W west of our area is anticipated to develop and move northeastward during the 36 hours or so. The 0614 UTC ASCAT scatterometer pass indicates that strong breeze conditions are occurring near 20N140W. This system will clip our northwestern corner and briefly produce gales Saturday morning. By late Saturday, however, the system will be weakening and moving past our northern 30N border. By Sunday morning, winds in our area will drop below strong breeze conditions. Combined SE wind waves and NW swell should produce peak seas around 15 feet in our northwestern corner on Saturday. A lingering moderate NW swell event will slowly move southeastward through Tuesday. Please read the latest high seas forecast under AWIPS/WMO headers HSFEP2/FZPN03 for more details. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The ITCZ extends from 08N104W to a 1010 mb low at 11N113W to beyond 10N140W. No significant deep convection is currently occurring. ...DISCUSSION... OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Gulf of California: NW fresh to strong winds are likely occurring throughout the entire Gulf this evening, though no observations have been available. Peak seas are up to 8 ft. Gaps in the Baja California mountains are allowing some NE winds to emerge on the Pacific coast. A 0518 UTC ASCAT scatterometer pass showed NE strong breeze conditions near Point Eugenia and just south of Ensenada. These winds will gradually weaken by Sunday morning as the high pressure in the southwestern United States slowly drops. Gulf of Tehuantepec: A strong cold front moving southward across the Gulf of Mexico on Saturday should induce a gap wind event in the Gulf of Tehuantepec starting Saturday evening. Gale conditions are expected Monday morning through Tuesday morning. The global models have come into better agreement on the timing and magnitude of this system. Peak seas are anticipated to reach around 13 ft on Monday morning and remain at least 8 ft through at least Wednesday morning. NW swell of about 8 ft are reaching the zones west of Baja California Norte, though these should be subsiding by later today. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... A Gulf of Papagayo gap wind event should start Sunday morning and continue through at least Wednesday morning. These NE winds should remain at fresh to strong breeze conditions. Peak seas will reach up to about 8 ft. REMAINDER OF THE AREA... See Special Feature above for details about a Gale Force Wind event for Saturday in our northwestern most waters. Elsewhere across the region, winds are fresh breeze or weaker and seas 8 ft or lower through Wednesday. $$ Landsea