000
AXPZ20 KNHC 010855
TWDEP

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1005 UTC Wed Sep 1 2021

Tropical Weather Discussion for the eastern Pacific Ocean from
03.4S to 30N, east of 120W including the Gulf of California, and
from the Equator to 30N, between 120W and 140W. The following
information is based on satellite imagery, weather observations,
radar, and meteorological analysis.

Based on 0600 UTC surface analysis and satellite imagery through
0830 UTC.

...TROPICAL WAVES...

The axis of a tropical wave is near 96W N of 02N, moving W at 10
kt. Associated convection is discussed in the monsoon trough 
section below.

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

The monsoon trough extends from low pres near 12.5N80.5W 1009 mb
to 14.5N105W to 09.5N140W. Scattered moderate to strong 
convection is noted from 08N to 15.5N between 83W and 114W. 
Scattered moderate convection is noted from 06N to 10N between 
114W and 130W.

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

Gentle to moderate S to SW winds prevail across all but the
entrance to Gulf of California tonight. Recent scatterometer 
data showed fresh westerly gap winds spilling into north and 
central portions. Seas are generally 2 to 4 ft across the basin. 
Active convection across portions of the Gulf in recent days 
associated with the remnants of Nora has shifted northeastward 
and across northern Mexico. Otherwise, weak high pressure 
prevails west of Baja California with gentle to moderate N to NW
winds. Gentle W to NW winds dominate the remainder of the 
offshore waters, with seas of 4 to 7 ft in mixed long period 
swells.

A weak high pressure ridge will prevail west of Baja California 
through the week with fairly tranquil marine conditions 
anticipated. Look for afternoon heating to produce fresh NW winds 
along portions of the Pacific coasts of Baja each afternoon. 

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

Light to gentle winds prevail north of the monsoon trough, with 
moderate to locally fresh W to SW winds south of the monsoon 
trough, and spreading into the waters offshore of El Salvador and
Guatemala. Seas are 4 to 7 ft across the offshore waters, except
for a few small areas of seas to 8 ft within the areas of fresh 
SW winds.

Mainly gentle winds will prevail north of the monsoon trough, 
with moderate to fresh offshore pulses expected nightly in the 
Papagayo region. Moderate to fresh S to SW winds south of the 
monsoon trough will prevail through early Wed before diminishing
some thereafter. 

REMAINDER OF THE AREA...

A surface trough extends from 31N122W to 25N128W with moderate 
to fresh N-NE winds occurring west of the trough, and seas of 7 
to 8 ft to the north of this trough. Winds and seas will 
decrease through midweek as the trough shifts slowly SE and 
dissipates. Otherwise, broad and weak high pressure dominates the
waters north of the monsoon trough, along with gentle to 
moderate NE trades. Gentle to moderate southerly winds prevail 
south of the monsoon trough, moderate to locally fresh east of 
125W. Seas of 5 to 8 ft in mixed long period swell dominate the 
waters. Little overall change in these marine conditions is 
forecast through the week.

$$
Stripling