000
AXPZ20 KNHC 311935
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1916 UTC Wed Jan 31 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 1800 UTC surface analysis and satellite imagery through
2100 UTC.

...SPECIAL FEATURES...

Gulf of Tehuantepec Gale Warning: High pressure prevails over 
eastern Mexico maintaining 30-40 kt winds in Tehuantepec. The 
area of high pressure dominating the Gulf of Mexico will start to
shift eastward, loosening the pressure gradient. Winds will fall
below gale force early Thu. Please refer to the East Pacific 
High Seas Forecast under AWIPS/WMO headers HSFEP2/FZPN03 KNHC for
more details.

Looking ahead, another gale force wind event is possible Fri 
night into Sat. This next event will be much weaker and shorter 
duration than the current event. 

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

A surface trough extends from 06N77W to 05N90W. The ITCZ 
continues from 05N90W to 06N108W to 04N115W to 09N140W. 
Scattered moderate convection is from 06N to 09N between 103W 
and 106W.

...DISCUSSION...
 
OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

Gulf of Tehuantepec: Please refer to the special features 
section above for more on the latest gap wind event. A broad 
wind field has generated a large area of 8 to 15 ft seas in 
northerly swell extending well away from the Gulf of Tehuantepec.

Elsewhere over the open waters, seas are expected to remain at 
or below 6 ft through Sun as a tranquil pattern prevails. 

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

20-25 KT winds over the Gulf of Papagayo will prevail through 
the remainder of the week. Elsewhere 20-25 kt winds over the Gulf
of Panama to 05N will pulse through Sunday.

REMAINDER OF THE AREA...

A mix of NE and NW swell continues over portions of the 
tradewind belt, with seas 8 ft or greater covering the waters 
from 08N to 11N W of 134W, where seas are peaking near 8 ft. 
Seas will subside to less than 8 ft across the trade wind belt
Thu. Large swell generated from the latest Gulf of Tehuantepec 
gap wind event will propagate across the waters S of 14N and E of
115W, while gradually subsiding through the end of the week.

$$
Formosa