000
AXPZ20 KNHC 282209
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
2206 UTC Tue Nov 28 2017

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 
2015 UTC.

...SPECIAL FEATURES...

Gulf of Tehuantepec Gale Warning: The tight pressure gradient 
across southern Mexico has begun to weaken modestly this 
afternoon, and gale force winds has ended for the time being 
across the Gulf of Tehuantepec. Peak winds have diminished to 
near 30 kt this afternoon with seas subsiding to 8-10 ft. Wind 
will diminish slightly through the evening hours and diminish in 
areal extent, but peak again near 30 kt just before sunrise 
Wednesday, with seas subsiding to 7-9 ft. Gale force winds are 
expected to develop again Wed night as moderate northerly wind 
flow become established across the western Gulf of Mexico. 

INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... 

The monsoon trough axis extends from 09N84W to 06N100W to 1010 
mb low at 07.5N106W to 06N113W, where it transitions to the 
intertropical convergence zone and continues to 09N130W to 
beyond 10N140W. Scattered moderate convection is from 07N TO 10N 
between 93W AND 98W. 

...DISCUSSION...

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

See Special Features paragraph above for information on the 
Gulf of Tehuantepec Gale Warning. 

The tail end of a cold front has stalled across the far N 
portion of the Gulf of California this afternoon and will 
dissipate across the area this evening. Strong NWly winds N of 
the front have diminished to near 20 kt with seas subsiding to 5-
6 ft. High pressure centered over the Pacific waters W of 
Southern California extends a ridge SE into the area to ne ar 
18N110W, and is producing moderate to fresh NW winds across the 
Pacific waters of Baja California. NW swell moving through the 
waters is leading to combined seas of 8 to 12 ft across the 
waters N of Punta Eugenia, and 5 to 9 ft southward to waters off 
of Cabo San Lucas. This swell will continue to propagate SE, 
with seas 8 ft and higher reaching the Revillagigedo Islands by 
late Wed afternoon. Seas across the waters W of Baja California 
to the Revillagigedo Islands will remain above 8 ft through late 
this week, as another reinforcing pulse of NW swell in excess of 
8 ft propagates into the waters Wed through Fri.

OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND 
WITHIN 750 NM OF ECUADOR...
  
Gulf of Papagayo: A tight pressure gradient between high pressure
over northern Central America and lower pressure across the
southwest Caribbean will enhance overnight drainage effects and
result in pulses of fresh to strong gap winds through the Gulf of
Papagayo through this evening, and to a lesser extent Wed into 
Wed evening. Seas are 6 to 8 ft presently, with winds and seas 
diminishing slightly this evening, before pulsing overnight. 
Stronger pulses are likely later in the week.

Light to gentle N to NE winds, and 4 to 5 ft seas are expected 
elsewhere through Sat N of the monsoon trough. Moderate 
southerly winds, and 4 to 6 ft seas, are forecast south of the 
monsoon trough. Northerly swell generated in the Gulf of 
Tehuantepec has reached the western part of forecast zone PMZ111 
(offshore waters of Guatemala and El Salvador) where seas of 7 
to 9 ft this afternoon will diminish through early tonight. 
Additional moderate to large mixed NW and N swell will reach the 
western portion of zone by Thu through the end of the week.

REMAINDER OF THE AREA... 

A large area of NW swell producing seas of 8 to 14 ft will 
continue to propagate across the region with the leading edge of 
8 ft seas reaching from the central Baja California peninsula to 
05N140W by this evening, then from 28N115W to 20N120W to 05N140W 
Wed, and from 28N115W to 16N110W to 00N140W Thu. A re-enforcing 
pulse of NW swell will reach the NW waters late Wed through Thu, 
as seas of 8 to 12 ft cover nearly the entire forecast waters S 
of 30N W of 110W Fri through the upcoming weekend. 

$$
Stripling