511 
AXPZ20 KNHC 282158
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
2205 UTC Sat Dec 28 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 1800 UTC surface analysis and satellite imagery through 
2145 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

The monsoon trough extends from 07N78W to 07N90W to 08N110W to 
08N121W. The ITCZ continues from 08N121W to 07N130W to 08N140W. 
Scattered moderate isolated strong convection is noted within 90 
nm of the monsoon trough between 79W and 85W. Scattered moderate 
convection is from 04N to 09N E of 90W, from 05N to 10N between 
97W and 111W, and from 04N to 09N W of 133W.

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

Scatterometer data show gentle to moderate NW to N flow off the 
coast of Baja California in the wake of a cold front that 
dissipated near Cabo San Lucas during the late morning hours. 
Moderate winds dominate the offshores of Baja California Sur 
with locally fresh winds extending to the entrance of the Gulf 
of California, and the offshores of Sinaloa and Jalisco. Long 
period NW swell associated with the former front will continue 
to propagate SE across the region through Sun, then subside Sun 
night. Elsewhere, light to gentle breezes prevail across the 
waters off southern Mexico.  

Another cold front will move southward into the Baja California 
Norte waters Mon, then weaken over the Baja California Sur 
waters on Tue. Large long period NW swell will impact the Baja 
offshore waters Mon through Wed. High pressure building over the 
Gulf of Mexico early next week will support strong northerly gap 
winds in the Gulf of Tehuantepec early Tue through Wed. Fresh NW 
winds are expected in the central and southern Gulf of 
California Sun and Sun night.

OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND 
WITHIN 750 NM OF ECUADOR... 

Satellite imagery and lightning data indicate the continuation 
of scattered showers and thunderstorms over the offshores of 
Costa Rica and Panama. Fresh to strong NE to E winds are likely 
ongoing in the Gulf of Papagayo region through the middle of the 
week while gentle to moderate SW flow is expected across the 
southern waters.

REMAINDER OF THE AREA...

A broad area of fresh to locally strong NE winds persists 
between a ridge dominating the waters N of 15N and the monsoon 
trough/ITCZ. Latest altimeter data indicate seas in the 8-9 ft 
range over this region, likely in mixed NW swell and NE wind 
waves. A surface trough extends from 08N115W to 15N115W and 
support scattered moderate convection with isolated tstms from 
09N to 20N between 106W and 117W. Elsewhere, generally gentle to 
moderate winds prevail across the Pacific high seas. 

Large NW swell associated with a former cold front that 
dissipated during the morning hours will gradually subside 
through Mon. Fresh to strong trade winds will develop west of 
125W Sun through Mon as high pressure builds north of the area. 
A stronger cold front will move southward into the northern 
waters Mon and Tue. Large long period NW swell will propagate SE 
across the forecast waters through the middle of next week, with 
seas building to 12-16 ft across the NW portion.

$$ 
Ramos