113 
AXPZ20 KNHC 171611 CCA
TWDEP 

Tropical Weather Discussion...Corrected
NWS National Hurricane Center Miami FL
1605 UTC Tue Nov 17 2020

Corrected Remainder of the Area section

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
1600 UTC.

...SPECIAL FEATURES...

Low pressure of 1009 mb is centered near 15N112W. This low is 
part of a broad area of low pressure that is located several 
hundred miles southwest of the coast of southern Mexico. Latest 
satellite imagery shows scattered moderate to isolated strong 
convection within 240 nm of the low in the NE quadrant and within
180 nm of the low in the NW quadrant. Overall, this convection 
has changed little in organization during the overnight hours.
Although environmental conditions are only somewhat conducive 
for development, a short-lived tropical depression could still 
form within the next couple of days as the low moves west- 
northwestward or northwestward away from the coast of Mexico.
Conditions are forecast to become increasingly unfavorable for 
further development on Thu. The low pressure has a medium chance
of becoming a tropical cyclone during the next 48 hours. Please 
refer to the latest NHC Tropical Weather Outlook at 
www.hurricanes.gov for more details.

Gale Warning: A tight pressure gradient resulting from strong 
high pressure surging southward along the eastern slopes of the 
Sierra Madre Oriental mountains of Mexico and over the western 
Gulf of Mexico is ushering strong northerly gale force winds 
through the Chivela Pass and out into the Tehuantepec region. 
This event will be a long-lived with gale force winds forecast to
reach near storm force late tonight into early Wed and again Wed
night into early Thu. Wave heights are forecast to build to the 
range of 13-20 ft by early Wed. Wave heights downstream of the 
Gulf of Tehuantepec are forecast to build slightly large,
possibly peaking to around 21 ft late Wed night into early 
Thu, with the leading edge of 8 ft or greater wave heights
expected to reach near 04N100W on Thu and to near 03N106W on 
Fri. Please read the latest NWS High Seas Forecast issued by the 
National Hurricane Center at website 
https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml for more details.

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

The monsoon trough axis extends from central Nicaragua near 
12N86W west-northwestward to 15N100W and to low pressure near 
15N112W 1008 mb to a second low pressure near 12N119W 1010 mb 
and to another 1010 mb low pressure near 10N126W and to 08N136W,
where overnight scatterometer data indicates that the ITCZ begins
and to continues to beyond the area at 09N140W. Scattered 
moderate convection is within 60 nm south of the trough between
east of 89W and between 124W and 127W.

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

A Gale Warning remains in effect for the Gulf of Tehuantepec. 
Please, see the Special Features section above for details.

A ridge extends across the offshore forecast waters west of Baja
California producing mainly gentle to moderate winds. Wave
heights are in the 5-7 ft range south of Punta Eugenia, and 7-9 
ft north of Punta Eugenia due to long-period northwest swell.
The swell will slowly decay through Wed allowing for wave 
heights north of Punta Eugenia to lower to 5-7 ft. 

The latest Ascat pass shows lighter wind speeds in the light to 
gentle range over the southern part of the Gulf. The earlier
moderate to fresh northwest winds over the northern part of the 
Gulf of California have become light and variable winds, and 
little change is expected with these winds through Thu.

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

Enhanced southwesterly flow of moderate to fresh speeds is 
occurring south of the monsoon trough portion offshore Panama 
along with wave heights of 6-7 ft. This enhanced flow has arisen 
primarily from the broad cyclonic circulation around major 
Hurricane Iota now inland norther Nicaragua.  Elsewhere, 
moderate to fresh southwest winds are present south of the 
monsoon trough east of 100W, with mainly gentle west to northwest
winds north of the monsoon trough. Wave heights are in the 5-7 
ft range. Wave heights generated in the Tehuantepec region will 
propagate across the offshore waters of El Salvador, extreme 
southern Honduras and Nicaragua through late Wed.

Scattered showers and thunderstorms in a band ahead of Iota are 
moving offshore the coasts of El Salvador, extreme southern 
Honduras and Nicaragua. This activity is likely to spread 
westward into the offshore waters of the aforementioned
countries through Thu. Some of this activity may contain strong 
gusty winds. 
 
REMAINDER OF THE AREA...Corrected

See the Special Features section above for the details on 
a broad low pressure that is located several hundred miles 
southwest of the southern coast of Mexico.

A 1018 mb high is centered near 25N115W. The associated ridge 
dominates the waters north of 17N and west of 110W. Gentle to 
moderate trades are along the southern periphery of the ridge 
west of 115W as noted in an overnight ASCAT pass. Wave heights 
are in the 6-7 ft range within that region. The overnight ASCAT 
passes suggested that weak low pressure of 1011 mb is near 
12N119W and a 1010 mb low is near 10N126W. Scattered moderate 
convection is within 120 nm in the SE quadrant of the low near 
10N126W. The ridge to the north of these lows will continue to 
weaken through Wed as a cold front that extends from near 
32N129W to 26N140W also weakens and dissipates as it reaches the 
northeast forecast waters by Thu. Large northwest swell, 
producing wave heights in the range of 8-11 ft, will follow in 
behind the front today, then gradually decay through Thu.

$$
Aguirre

714 
AXPZ20 KNHC 171606
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1605 UTC Tue Nov 17 2020

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
1545 UTC.

...SPECIAL FEATURES...

Low pressure of 1009 mb is centered near 15N112W. This low is 
part of a broad area of low pressure that is located several 
hundred miles southwest of the coast of southern Mexico. Latest 
satellite imagery shows scattered moderate to isolated strong 
convection within 240 nm of the low in the NE quadrant and within
180 nm of the low in the NW quadrant. Overall, this convection 
has changed little in organization during the overnight hours.
Although environmental conditions are only somewhat conducive 
for development, a short-lived tropical depression could still 
form within the next couple of days as the low moves west- 
northwestward or northwestward away from the coast of Mexico.
Conditions are forecast to become increasingly unfavorable for 
further development on Thu. The low pressure has a medium chance
of becoming a tropical cyclone during the next 48 hours. Please 
refer to the latest NHC Tropical Weather Outlook at 
www.hurricanes.gov for more details.

Gale Warning: A tight pressure gradient resulting from strong 
high pressure surging southward along the eastern slopes of the 
Sierra Madre Oriental mountains of Mexico and over the western 
Gulf of Mexico is ushering strong northerly gale force winds 
through the Chivela Pass and out into the Tehuantepec region. 
This event will be a long-lived with gale force winds forecast to
reach near storm force late tonight into early Wed and again Wed
night into early Thu. Wave heights are forecast to build to the 
range of 13-20 ft by early Wed. Wave heights downstream of the 
Gulf of Tehuantepec are forecast to build slightly large,
possibly peaking to around 21 ft late Wed night into early 
Thu, with the leading edge of 8 ft or greater wave heights
expected to reach near 04N100W on Thu and to near 03N106W on 
Fri. Please read the latest NWS High Seas Forecast issued by the 
National Hurricane Center at website 
https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml for more details.

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

The monsoon trough axis extends from central Nicaragua near 
12N86W west-northwestward to 15N100W and to low pressure near 
15N112W 1008 mb to a second low pressure near 12N119W 1010 mb 
and to another 1010 mb low pressure near 10N126W and to 08N136W,
where overnight scatterometer data indicates that the ITCZ begins
and to continues to beyond the area at 09N140W. Scattered 
moderate convection is within 60 nm south of the trough between
east of 89W and between 124W and 127W.

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

A Gale Warning remains in effect for the Gulf of Tehuantepec. 
Please, see the Special Features section above for details.

A ridge extends across the offshore forecast waters west of Baja
California producing mainly gentle to moderate winds. Wave
heights are in the 5-7 ft range south of Punta Eugenia, and 7-9 
ft north of Punta Eugenia due to long-period northwest swell.
The swell will slowly decay through Wed allowing for wave 
heights north of Punta Eugenia to lower to 5-7 ft. 

The latest Ascat pass shows lighter wind speeds in the light to 
gentle range over the southern part of the Gulf. The earlier
moderate to fresh northwest winds over the northern part of the 
Gulf of California have become light and variable winds, and 
little change is expected with these winds through Thu.

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

Enhanced southwesterly flow of moderate to fresh speeds is 
occurring south of the monsoon trough portion offshore Panama 
along with wave heights of 6-7 ft. This enhanced flow has arisen 
primarily from the broad cyclonic circulation around major 
Hurricane Iota now inland norther Nicaragua.  Elsewhere, 
moderate to fresh southwest winds are present south of the 
monsoon trough east of 100W, with mainly gentle west to northwest
winds north of the monsoon trough. Wave heights are in the 5-7 
ft range. Wave heights generated in the Tehuantepec region will 
propagate across the offshore waters of El Salvador, extreme 
southern Honduras and Nicaragua through late Wed.

Scattered showers and thunderstorms in a band ahead of Iota are 
moving offshore the coasts of El Salvador, extreme southern 
Honduras and Nicaragua. This activity is likely to spread 
westward into the offshore waters of the aforementioned
countries through Thu. Some of this activity may contain strong 
gusty winds. 
 
REMAINDER OF THE AREA...

See the Special Features section above for the details on 
a broad low pressure that is located several hundred miles 
southwest of the southern coast of Mexico.

A 1018 mb high is centered near 25N115W. The associated ridge 
dominates the waters north of 17N and west of 110W. Gentle to 
moderate trades are along the southern periphery of the ridge 
west of 115W as noted in an overnight ASCAT pass. Wave heights 
are in the 6-7 ft range within that region. The overnight ASCAT 
passes suggested that weak low pressure of 1011 mb is near 
12N119W and a 1010 mb low is near 10N126W. Scattered moderate 
convection is within 120 nm in the SE quadrant of the low near 
10N126W. The ridge to the north of these lows will weaken 
through Tue as a cold front just northwest of the area moves into
the northwest part of the area. The front will reach a position 
from near 32N132W to 27N135W and to 26N140W early Tue, then begin
to dissipate from near 32N125W to 26N132W, and continue to 
dissipate as a stationary front from there to near 23N140W. Large
northwest swell, producing wave heights in the range of 8-11 ft,
will follow in behind the front today, then gradually decay 
through Thu.

$$
Aguirre