NHC Eastern Pacific Tropical Weather Discussion
Sun Jan 18 10:00 pm
000
AXPZ20 KNHC 190300
TWDEP
Tropical Weather Discussion
NWS National Hurricane Center Miami FL
0405 UTC Mon Jan 19 2026
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 0000 UTC surface analysis and satellite imagery through
0300 UTC.
...SPECIAL FEATURES...
Gulf of Tehuantepec Gale Warning: The pressure gradient between
strong high pressure building across eastern Mexico and the
eastern north Pacific monsoon trough is supporting gale- force N
gap winds over the Gulf of Tehuantepec. This gale will likely
last into Wed morning, with a peak of severe gale overnight. Very
rough seas over the Tehuantepec area will spread SW, reaching as
far as 100W on Mon, with seas peaking near 18 ft tonight. Marine
interests transiting across the Gulf of Tehuantepec into the
middle part of the week should be aware of these gale- force gap
winds and take the necessary action to avoid hazardous marine
conditions over the affected waters.
Please read the latest 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 extends from 08N78W to 08N85W to 04N95W. The
ITCZ continues from 04N95W to 07N102W to beyond 06N140W.
Scattered moderate to isolated strong convection is noted from
07N to 17N between 102W and 115W.
...OFFSHORE WATERS WITHIN 250 NM OF MEXICO...
A Gale Warning remains in effect for the Tehuantepec region.
Refer to the Special Features section above for details.
Outside of the Tehuantepec area, gentle to moderate winds and
moderate seas persist across the Mexican offshore waters.
Scattered showers and thunderstorms are active near Socorro
Island, associated with a trough in the area.
For the forecast, aside from the Tehuantepec gale, gentle to
moderate winds will prevail through the middle part of the week.
....OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA,
AND WITHIN 750 NM OF ECUADOR...
Fresh to strong gap winds, and seas of 5 to 7 ft, prevail across
the Gulf of Papagayo, extending SW to 88W. Elsewhere, winds are
moderate or weaker with seas in the 3 to 5 ft range.
For the forecast, the pressure gradient between high pressure north of
the area and the eastern north Pacific monsoon trough will
support fresh to strong NE to E winds and rough seas in the
Papagayo region through at least the middle of the week. The
pressure gradient will also support moderate to fresh N winds
over the Gulf of Panama from Mon night into Wed night.
Elsewhere, winds will be moderate or weaker over the forecast
waters through midweek. NW to N swell generated by gales over
the Gulf of Tehuantepec will bring rough to very rough seas well
offshore Guatemala and El Salvador through midweek.
...REMAINDER OF THE AREA...
Moderate showers are active along a stationary front extending
from 30N135W to 18N140W. Moderate winds are in the vicinity of
the front. Large NW swell of 8 to 11 ft accompanies the front,
covering the area north of 10N and west of 130W. Scattered
showers and thunderstorms are also active near a trough along
120W between 15N and
AXPZ20 KNHC 190300
TWDEP
Tropical Weather Discussion
NWS National Hurricane Center Miami FL
0405 UTC Mon Jan 19 2026
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 0000 UTC surface analysis and satellite imagery through
0300 UTC.
...SPECIAL FEATURES...
Gulf of Tehuantepec Gale Warning: The pressure gradient between
strong high pressure building across eastern Mexico and the
eastern north Pacific monsoon trough is supporting gale- force N
gap winds over the Gulf of Tehuantepec. This gale will likely
last into Wed morning, with a peak of severe gale overnight. Very
rough seas over the Tehuantepec area will spread SW, reaching as
far as 100W on Mon, with seas peaking near 18 ft tonight. Marine
interests transiting across the Gulf of Tehuantepec into the
middle part of the week should be aware of these gale- force gap
winds and take the necessary action to avoid hazardous marine
conditions over the affected waters.
Please read the latest 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 extends from 08N78W to 08N85W to 04N95W. The
ITCZ continues from 04N95W to 07N102W to beyond 06N140W.
Scattered moderate to isolated strong convection is noted from
07N to 17N between 102W and 115W.
...OFFSHORE WATERS WITHIN 250 NM OF MEXICO...
A Gale Warning remains in effect for the Tehuantepec region.
Refer to the Special Features section above for details.
Outside of the Tehuantepec area, gentle to moderate winds and
moderate seas persist across the Mexican offshore waters.
Scattered showers and thunderstorms are active near Socorro
Island, associated with a trough in the area.
For the forecast, aside from the Tehuantepec gale, gentle to
moderate winds will prevail through the middle part of the week.
....OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA,
AND WITHIN 750 NM OF ECUADOR...
Fresh to strong gap winds, and seas of 5 to 7 ft, prevail across
the Gulf of Papagayo, extending SW to 88W. Elsewhere, winds are
moderate or weaker with seas in the 3 to 5 ft range.
For the forecast, the pressure gradient between high pressure north of
the area and the eastern north Pacific monsoon trough will
support fresh to strong NE to E winds and rough seas in the
Papagayo region through at least the middle of the week. The
pressure gradient will also support moderate to fresh N winds
over the Gulf of Panama from Mon night into Wed night.
Elsewhere, winds will be moderate or weaker over the forecast
waters through midweek. NW to N swell generated by gales over
the Gulf of Tehuantepec will bring rough to very rough seas well
offshore Guatemala and El Salvador through midweek.
...REMAINDER OF THE AREA...
Moderate showers are active along a stationary front extending
from 30N135W to 18N140W. Moderate winds are in the vicinity of
the front. Large NW swell of 8 to 11 ft accompanies the front,
covering the area north of 10N and west of 130W. Scattered
showers and thunderstorms are also active near a trough along
120W between 15N and