000 AXPZ20 KNHC 051530 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1605 UTC Tue Mar 5 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 1200 UTC surface analysis and satellite imagery through 1500 UTC. ...SPECIAL FEATURES... Gale Warning: A cold front from 30N129W to 21N140W extends southward from a 1001 mb low centered at 34N135W. Scatterometer data showed gale force winds N of 28N west of the front. An earlier altimeter pass measured 10 to 14 ft seas in the area. The cold front will move eastward across northern waters today. Winds will gradually diminish, and the gale warning should be lifted by 1800 UTC. Maximum NW swell of about 15 ft in our area will propagate SE while gradually diminishing. Peak seas should diminish below 12 ft by tonight and below 8 ft by Thu morning. Gale Warning: High pressure building behind a strong cold front is inducing gale force winds in the Gulf of Tehuantepec, which are expected to persist through Wed night. Strong N winds should end Fri afternoon. It is anticipated that winds will peak at 40- 45 kt and seas reach almost 20 feet early Wed morning. Please read 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 about these gale warnings. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The Intertropical Convergence Zone axis extends from 06N90W to 02N119W to 05N140W. Scattered moderate rain showers are from 03N to 05N between 102W and 110W. A second ITCZ is analyzed S of the Equator. ...DISCUSSION... OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Gulf of Tehuantepec: A Gale Warning is in effect for the Gulf of Tehuantepec. Please read the Special Features section for details. Gulf of California: Developing low pressure over the U.S. Great Basin will support nocturnal pulsing of fresh to strong SW to W in the northern Gulf of California Thu night and Fri night. Generally tranquil marine conditions are expected elsewhere across the Gulf through at least Sat night. On Thu, a weakening cold front will reach Baja California Norte with minimal impacts. Conditions should remain benign W of Baja California for the next several days. No large long-period swell is anticipated to affect the region. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Gulfs of Fonseca, Papagayo, and Panama: A moderate pressure gradient in the W Caribbean combined with nocturnal drainage flow will produce enhanced winds in the Gulfs of Papagayo and Panama each evening through Sat night. The forcing is strongest through Thu night, also causing strong breeze conditions in the Gulf of Fonseca. Winds should peak around 30 kt in the Gulf of Papagayo Wed and Thu morning with peak seas of 10-12 ft. Winds should peak around 25 kt in the Gulf of Panama Wed, Thu, and Fri mornings with peak seas of around 8 ft. No large long-period swell are expected to impact the area for the next several days. A surface trough is analyzed well W of the Galapagos Islands offshore waters with minimal shower activity. NE swell generated by a strengthening gap wind event in the Gulf of Panama will propagate SW toward the Galapagos Islands later in the week with seas building to 5-7 ft. REMAINDER OF THE AREA... Marine conditions have deteriorated N of 25N W of 135W as a low pressure system and associated frontal boundaries affect this region. Please see the Special Features Section for more details on a Gale Warning. Elsewhere, long-period NW swell mixing with trade wind flow is maintaining a small area of 8 ft seas from 05N to 12N between 129W and 135W. These seas will gradually subside today. $$ Mundell