000
AXPZ20 KNHC 300304
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
0405 UTC Mon Dec 30 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 0000 UTC surface analysis and satellite imagery through 
0300 UTC.

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

The monsoon trough extends from 06N77W to 06N100W to 09N120W to 
08N122W. The ITCZ continues from 08N122W to 08N130W to beyond 
06N140W. Scattered moderate convection is from 03N to 08N E of 
86W, and from 06N to 12N W of 116W.  

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

A weak pressure gradient over the region of California supports 
light to gentle NW winds across the Baja California Norte 
offshores. A tighter pressure gradient between a strong ridge W 
of Baja and a trough over Mexico supports gentle to moderate NE 
winds over the Baja California Sur offshore waters. A stronger 
gradient of pressure also supports fresh to strong NW winds over 
the central and southern Gulf of California, and moderate to 
fresh northerlies over the Sinaloa and Jalisco offshores. 
Residual long period NW swell along the Baja California Sur 
offshores will subside tonight. Otherwise, light to gentle 
breezes prevail across the waters off southern Mexico. 

A cold front associated with a complex low pressure system will 
move S into the Baja California Norte waters Mon, then weaken 
over the Baja California Sur waters Tue. Fresh to locally strong 
winds are expected behind the front along with long period NW 
swell. Wave heights in the range of 8 to 13 ft are expected with 
this front, extending to near the Revillagigedo Islands by Thu. 
Dangerous surf is expected along the coast of Baja Wed and Thu 
as large NW swell with period of 20-25 seconds moves over the 
region.  

Northerly flow in the wake of a cold front that will move off 
the Gulf of Mexico early on Tue will support the next gap wind 
event in the Gulf of Tehuantepec. Strong to locally near gale 
force winds are expected from early Tue through Tue evening when 
return flow establishes N of the area.

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

Moderate to fresh NE to E winds will pulse over the Gulf of 
Papagayo region through Thu. Gentle to moderate SW flow is 
expected across the waters adjacent to Costa Rica, Panama, 
Colombia, and Ecuador through the end of the week.

REMAINDER OF THE AREA...

A strong ridge anchored by a 1031 mb high near 35N140W supports 
a broad area of fresh to locally strong NE winds from 10N to 25N 
W of 113W. Seas in the 8-10 ft range prevail over this region in 
mixed NW swell and NE swell. Otherwise, gentle to moderate 
N to NE winds prevail elsewhere. 

Fresh to strong trade winds will expand northward and west of 
125W through Wed as the pressure gradient increases between a 
cold front entering the northern waters on Mon and the strong 
ridge building over the forecast waters N of 20N. A low pres 
associated with the front will head SE along the Baja Peninsula 
through Tue night when the front is forecast to dissipate near 
the Revillagigedo Islands. Sea heights of 8 to 16 ft are 
expected over the northern waters behind the front. Large long 
period NW swell will propagate SE across the forecast waters 
through the end of the week, supporting seas 8 and 12 ft 
generally W of 110W.

$$
Ramos