Pacific Discussion

    
            
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						NHC East Pacific Tropical Weather Discussion
					
				
				
    
					
						by nhcwebmaster@noaa.gov (nhcwebmaster) on April 26, 2018 at 3:28 AM
					
					
    000
 AXPZ20 KNHC 260328
 TWDEP 
 Tropical Weather Discussion
 NWS National Hurricane Center Miami FL
 328 UTC Thu Apr 26 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 0000 UTC surface analysis and satellite imagery through
 0330 UTC.
 ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... 
 A surface trough extends from 05N77W to 06N100W. The
 intertropical convergence zone continues from 06N100W to 08N110W
 to 05N130W to beyond 07N140W. Scattered moderate convection is
 noted within 90 nm north of the trough between 85W and 92W.
 Scattered moderate convection also noted along the ITCZ from 04N
 to 11N between 110W and 125W. 
 ...DISCUSSION...
 OFFSHORE WATERS WITHIN 250 NM OF MEXICO...
 1020 mb high pressure west of Baja California near 27N125W will
 dissipate overnight ahead of a weakening cold front advancing
 from the west. The front will dissipate before reaching the coast
 of Baja California through late Thu. A ridge will build in the 
 wake of the front, allowing NW winds in the offshore waters to
 become fresh by late Thu. Seas will build to 8 ft by Thu night 
 off Baja California Sur south of Cabo San Lazaro toward the 
 Revillagigedo Islands in a combination of the 15 to 20 kt NW flow
 and longer period NW swell propagating through the region. The
 fresh NW winds will spread Fri into Sat and becoming locally
 strong as troughing forms over the Colorado River valley north of
 the region. The large area of fresh to occasionally strong NW
 winds will allow 8 to 10 ft seas off the Baja California coast
 through Sun. 
 Light to gentle W to NW winds are expected in the Gulf of 
 California through Sat.
 Farther south, fresh to strong northerly winds are possible in 
 the Gulf of Tehuantepec this weekend, particularly during Sat 
 morning as high pressure builds over the western Gulf of Mexico. 
 Elsewhere, mainly light to gentle winds are expected through 
 Sun.
 OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND 
 WITHIN 750 NM OF ECUADOR... 
 Fresh northeast nocturnal winds are expected in and downstream 
 of the Gulf of Papagayo through tonight, resuming on Sunday
 night. Gentle to moderate offshore flow will prevail elsewhere N
 of 09N, and light to gentle SW winds are expected S of 09N with
 seas of 4-6 ft.
 REMAINDER OF THE AREA... 
 A cold front extends from 31N1301W to 24N140W. This front will 
 move slowly east while dissipating into a trough overnight into
 early Thu. A ridge will build behind the dissipating front 
 through the weekend. Moderate to fresh northeast trade winds and 
 7-9 ft seas are observed across the tropical waters between 07N 
 and 20N, south of the subtropical ridge and north of the the 
 ITCZ. These winds will increase to fresh to locally strong as the
 pressure increases north of this region into the upcoming 
 weekend. This will also result in an increase of the areal 
 coverage of seas of 8-9 ft.
 7-8 ft southerly swell observed south of the equator between 90W 
 and 120W will gradually subside through Thu morning.
 Trade wind convergence along the ITCZ along with upper divergence
 south of an ridge aloft near 14N113W is resulting in scattered 
 showers and thunderstorms 04N to 11N between 110W and 125W
 $$
 Christensen […]
    
				
    
			
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