000
AXPZ20 KNHC 151522
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1443 UTC Mon Jan 15 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 1200 UTC surface analysis and satellite imagery through
1500 UTC.

...SPECIAL FEATURES...

Gulf of Tehuantepec Gale Warning:  Strong gales continue across 
the Tehuantepec region, where seas are as high as 19 ft. Winds 
begin to slowly diminish through Tue evening. The resultant 
plume of NE swell will propagate westward reaching as far W as 
120W late today. A new cold front will move into the Gulf of 
Mexico, with the associated high pressure behind to once again
bring strong gales across Tehuantepec Tue night through Thu 
night. 

Gulf of Papagayo Gale Warning: Gale force NE winds extends SW 
from the Gulf of Papagayo to near 10N86.5W. Winds will diminish 
below gale force today, with nocturnal strong pulses expected each
night the remainder of the week. 

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

A surface trough from 09N78W TO 08N84W TO 05N101W. The ITCZ
extends from 05N101W to 08N120W to 08N140W. Scattered moderate 
isolated strong convection is noted within 30 nm of the trough
between 81W and 92W. 

...DISCUSSION...

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

See special feature section for information about the gale 
warning in the Gulf of Tehuantepec.

W of the Baja California Peninsula: Large NW swell, with periods
in the 18 to 22 second range, will build seas to near 13 ft 
expected W of Baja by tonight, and persisting through early Wed.
The large swell will generate very high and powerful surf along 
the coasts and outer reefs of Baja and mainland Mexico through 
Wed.

Gulf of California: Light to moderate NW flow is forecast across 
across the entire gulf waters through Fri. 

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

See special feature section for information about the gale 
warning in the Gulf of Papagayo. Gale force winds over the Gulf 
of Papagayo will diminish today. Strong nocturnal pulses are 
expected across the Gulf of Papagayo the remainder of the week. 
Seas generated from these gap winds will result in large seas 
across the offshore waters from 04N to 14N W of 87W through Tue, 
before subsiding from the E. 

REMAINDER OF THE AREA...Large, long period NW swell is bringing
seas to 20 ft over the western waters. The swell will propagate 
SE across the discussion area, with seas 8 ft or greater covering
much of the forecast waters by Tue.
   
$$
AL