067 
AXPZ20 KNHC 200306
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
0405 UTC Thu Sep 20 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 0000 UTC surface analysis and satellite imagery through 
0230 UTC. 

...SPECIAL FEATURES...

Tropical Depression Nineteen-E 1002 mb is centered along the 
coast of Mexico near 27.0N 111.2W at 8 PM PDT, moving NNE at 6 
kt. Maximum sustained winds are 25 kt with gusts to 35 kt. The 
depression will move inland overnight, then dissipate by Thu 
afternoon. Numerous moderate scattered strong convection is in 
the Gulf of California from 23.5N to 28N. T.D. 19-E will bring 
widespread heavy rain and gusty SW winds to the south-central 
Gulf of California and adjacent land areas during the next 24 
hours. Life-threatening flash floods and landslides are possible 
through Thu. See latest NHC public advisory under AWIPS/WMO 
headers MIATCPEP4/WTPZ34 KNHC for more details.

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

The monsoon trough extends from 09N79W to 11N100W to 10N109W, 
then resumes from a low pressure near 17N119W to 13N126W. The 
ITCZ continues from 13N126W to 12N140W. Scattered moderate 
isolated strong convection is from 07N to 11N between 105W and 
115W. Scattered moderate convection is within 90 nm south of the 
convergence zone axis between 121W and 130W.

...DISCUSSION...

OFFSHORE WATERS WITHIN 250 NM OF MEXICO... 

Please see the Special Features section for details on Tropical 
Depression Nineteen-E located in the central Gulf of California.

High pressure NW of the area supports moderate to fresh NW winds 
W of Baja California. Seas are 5-7 ft across the offshore waters.
The pressure gradient will relax Thu night, allowing winds and 
seas to diminish by this weekend. The NW winds are expected to 
increase early next week as the gradient tightens just W of the 
Baja California Peninsula.

A locally tight pressure gradient will support pulsing nocturnal 
northerly winds in the Gulf of Tehuantepec the next few nights.

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

Offshore nocturnal winds will pulse to moderate to occasionally
fresh near the Gulf of Papagayo the next several nights.

Cross-equatorial SW swell reaching the Central American coast 
will slowly subside this weekend. The monsoon trough will 
meander near 10N the next few days.

REMAINDER OF THE AREA...   

An elongated surface trough extends from the southern tip of 
Baja California to weak 1010 mb low pressure area centered near 
17N119W. Ridging extends over the waters NW of the trough axis. 
Moderate to locally fresh trades are N of the convergence zone 
west of 120W, supporting seas to 8 ft from 13N-19N W of 130W. 
These seas will subside the next 2 days as the pressure gradient 
weakens.

$$
Mundell