000
AXPZ20 KNHC 262157
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
2205 UTC Thu Dec 26 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 07N87W to 07N104W to 
07N117W. The ITCZ continues from 07N121W to 07N132W to beyond 
07N140W. Scattered moderate convection is from 05N to 08N 
between 81W and 87W, from 06N to 10N between 100W and 109W, and 
from 07N to 09N W of 123W. 

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

A cold front passes through 29N115W to 26N121W to 28N137W.
The front will reach Cabo San Lazaro to 22N120W by Friday 
morning and then weaken before dissipating near Cabo San Lucas 
early on Sat. Latest scatterometer data continue to show fresh 
to strong winds on either side of the cold front and N of Punta 
Eugenia. Fresh to locally near gale force winds will continue to 
affect the Baja California Norte offshore waters through Fri 
morning. Long-period NW swell following the front, with sea 
heights reaching 18 feet, moves across the waters off Baja 
California this evening. The sea heights will start decaying 
tonight, however sea heights to 10 ft are expected along the 
Baja offshores through Sun evening.   

Strong SW winds are in the northern Gulf of California ahead of 
the cold front this evening. The next cold front will approach 
the waters off northern Baja California Norte early next week. 

Otherwise, fresh to locally strong northerly winds off the coast 
between Cabo Corrientes and Manzanillo will diminish to moderate 
northerly winds tonight.

Tehuantepec: Strong gap winds will pulse tonight and Fri, due to 
local drainage impacts and a low to mid-level trough setting up 
in the Yucatan Peninsula. 

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

Fresh to strong winds are expected across the Gulf of Papagayo 
and downwind to near 90W through the middle of the upcoming 
week. Gentle to moderate south to southwest monsoon flow will 
persist elsewhere, across the offshore waters of Costa Rica, 
Panama, Colombia, and Ecuador. Light to gentle wind flow will 
dominate across the Gulf of Panama. 

REMAINDER OF THE AREA...

A surface ridge dominates the waters N of 15N W of 120W. The 
pressure gradient between the ridge and lower pressure in the 
vicinity of the ITCZ is supporting moderate to fresh tradewinds 
from the ITCZ to 12N. A cold front extends from Baja California 
Norte near 29N115W to 25N130W to 28N138W. Fresh to strong winds 
prevail on either side of the front N of 25N between 119W and 
128W. Latest altimeter data show sea heights of 12 to 17 feet N 
of the front between 119W and 136W. Mixed NE and NW swell is 
elsewhere W of 120W with sea heights to 11 ft. Seas will start 
diminishing on Fri, however long period NW swell with seas to 10 
ft is expected to continue through the weekend. 

Another cold front, that is in the north central Pacific Ocean,
will move toward the waters north of 25N and west of 130W late 
Saturday into Sunday. High pressure building behind this front 
will help to bring an increase to the tradewinds from 15N to 25N 
west of 125W by Sunday.

$$
NR