335
AXPZ20 KNHC 080859
TWDEP

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1005 UTC Mon Jun 8 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 0600 UTC surface analysis and satellite imagery through
0800 UTC.

...SPECIAL FEATURES...

Recently upgraded Tropical Storm Boris is centered near 15.9N
99.2W at 08/0900 UTC, moving northeast at 4 kt. Estimated minimum
central pressure is 1002 mb. Maximum sustained wind speed is 35
kt with gusts to 45 kt. Peak seas are currently near 4 m or 12-13
ft. Very deep and intense convection is noted on satellite
imagery with numerous strong in a band within 480 nm in the SE
quadrant and within 150 nm in the W semicircle. Scattered
moderate isolated strong convection is noted elsewhere from 04N
to 19N between 91W and 104W. Boris is moving toward the
northeast. A turn toward the north is expected later today,
followed by a turn toward the northwest by tonight. On the
forecast track, the center of Boris is expected to reach the
coast of Guerrero, Mexico, this afternoon or this evening. Some
slight strengthening is possible today, but quick weakening is
expected once the center reaches the coast. Boris is forecast to
dissipate inland over Mexico by Tue. Heavy rainfall associated
with Tropical Storm Boris will impact portions of southern
Mexico. This rainfall may produce life-threatening flooding and
mudslides, especially in areas of steep terrain. Please read
the latest HIGH SEAS FORECAST issued by the National Hurricane
Center at website - https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml
and the latest Two-E NHC Forecast/Advisory and Public Advisory
at www.hurricanes.gov for more details.

Offshore of Central America (Invest EP92): Showers and thunderstorms
are starting to show signs of organization in association with a
1006 mb low pressure area offshore of Central America near
10.5N87.5W. Very deep and intense convection is noted on satellite
imagery with numerous strong from 05N to 13N between 84W and
90.5W, and scattered moderate elsewhere from 00N to 14N
between 78W and 91W. Associated winds are currently 20-30 kt,
while peak seas are around 4 m or 12-13 ft. Environmental
conditions appear conducive for further development of this
system, and a tropical depression is likely to form during the
next day or two while the system moves slowly northward and then
northwestward toward the coast of Central America. Interests
along the Pacific coasts of northwestern Costa Rica, Nicaragua,
Honduras, El Salvador, and Guatemala should monitor the progress
of this system, as heavy rainfall and life-threatening flash
flooding are possible through the middle portion of this week.
This system has a high chance of tropical cyclone formation in
the next 48 hours days. Refer to the latest NHC Tropical Weather
Outlook at www.hurricanes.gov for updates.

...TROPICAL WAVES...

A tropical wave is just W of low pressure, Invest EP92, along
88.5W, from N of 06.5N to central El Salvador, moving westward at
5-10 kt. Nearby convection is described above.

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

A monsoon trough extends from 09N78W to across Panama and along
the southern coast of Costa Rica to low pressure, Invest EP92,
near 10.5N87.5W to just E of Tropical Storm Boris near 16N97W,
then resumes SW of the Boris at 12N10W to low pressure at
10.5N108.5W to 08N117W to 10N133W just SE of the Remnant Low of
Amanda. The ITCZ is just SW of the Remnant low from 07N139W to
beyond 06N140W. The majority of deep convection near the monsoon
trough is related to and described with Boris and Invest EP92 in
the Special Features section above. Otherwise, scattered moderate
convection is noted within 180 nm in the SE semicircle of the
low near 10.5N108.5W.

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

Please see the Special Features section for details on recently
upgraded Tropcial Storm Boris approaching the coast of
southern/SW Mexico, and on low pressure, Invest EP92, offshore
Central America which may bring some outer impacts to Oaxaca.

Otherwise, a broad ridge extends from a 1027 mb high NE of the
Hawaiian Islands near 33N147W southeastward to the Revillagigedo
Islands. Broad low pressure extends from southern California SSE
across the eastern coast of Baja California. This pattern is
supporting gentle to moderate W-NW winds W of 110w including
offshore Baja California where seas are mainly 6-9 ft in a mix of
converging long period S-SW and shorter period NW swells. A
locally tight pressure gradient near Cabo San Lucas results in
fresh to strong W-NW winds just SSE of the southern tip of Baja
California as well as in the southern Gulf of California. Similar
wind speeds but out of the SW are in the northern Gulf of
California N of 30N. Moderate to fresh winds are found between
106W and 110W, then higher leading into Boris. Seas are 7-11 ft
E of 110W to the W of Boris. In the Gulf of California, seas are
3-5 ft N of 30N, 1-3 ft across the remainder of the northern and
central Gulf, and 4-6 ft in the southern Gulf with long period
southerly swells moving through the entrance.

For the forecast, Tropical Storm Boris will move to 16.3N 99.2W
this afternoon, move inland and weaken to a tropical depression
near 17.4N 100.2W Tue morning, and dissipate Tue afternoon.
Elsewhere, a broad surface ridge will sustain gentle to moderate
NW winds across the Baja Norte waters through this evening, and
across the Baja Sur to Revillagigedo Islands through Tue evening
before weakening. Moderate to fresh NW to N winds and moderate to
rough seas will prevail across the far outer waters of Baja
Norte for the early part of the week. Large, cross equatorial and
long period S-SW swell will impact southern and southwestern
Mexico waters through Tue night, and impacting the Baja
California waters later today through Wed where it will mix with
NW shorter period swells. Marine conditions should significantly
improve by the end of the week with tranquil conditions across
the offshore waters of Mexico.

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

Please see the Special Features section for details on low
pressure, Invest EP92, offshore Central America, which has the
high chance for tropical cyclone formation in the next 48 hours,
with gale conditions forecast by this afternoon.

Very deep and intense convection continues to impact much of the
offshore waters from Panama W-NW to Guatemala due to the monsoon
trough and EP92. More details are also described above. Winds of
20-30 kt continue to impact the waters offshore western Costa
Rica and Nicaragua, as well as well offshore El Salvador and
Guatemala, with seas of 8-12 ft. Winds closer to shore of El
Salvador and Guatemala are weaker, mainly gentle to moderate
where the pressure gradient is weaker, along with 5-7 ft seas.
Elsewhere, including the rest of the offshore waters of Costa
Rica, Panama, Colombia and Ecuador, mainly gentle to moderate
S-SW winds prevail. Seas are 4-7 ft from offshore northern
Colombia and Panama, and 8-12 ft in long period cross-equatorial
swell elsewhere including from Ecuador to beyond the Galapagos
Islands.

For the forecast, low pressure, Invest EP92, offshore of Central
America has showers and thunderstorms which are starting to show
signs of organization. Environmental conditions appear conducive
for further development of this system, and a tropical
depression is likely to form during the next day or two while the
system moves slowly northward and then northwestward toward the
coast of Central America. Interests along the Pacific coasts of
northwestern Costa Rica, Nicaragua, Honduras, El Salvador, and
Guatemala should monitor the progress of this system, as heavy
rainfall and life-threatening flash flooding are possible through
the middle portion of this week. Gale-force winds are forecast
with this system regardless of tropical development by this
afternoon if not sooner. Otherwise, large, long period cross-
equatorial swell with seas of 8-12 ft will continue to impact the
offshore waters through the early part of the week resulting in
large surf at the coasts. Refer to your local meteorological
information for more details in the surf zone. Mainly gentle to
moderate winds will prevail away from Invest EP92 through the
week.

...REMAINDER OF THE AREA...

The 1007 mb Remnant Low of Amanda is analyzed and seen on proxy-
vis satellite imagery near 11N136.5W. Scattered moderate
convection is confined in the N quadrant between 45 nm and 90
nm. Associated winds are 20-25 kt with a large are of 7-10 ft
seas surrounding the circulation. Otherwise, a broad ridge extends
from a 1027 mb high NE of the Hawaiian Islands near 33N147W
southeastward to the Revillagigedo Islands. Moderate to fresh
N-NE trade winds are found under the ridge N of 20N and W of 120W
as seen on recent scatterometer passes. Seas are 6-8 ft N of 20N
and W of 130W, and 7-10 ft N of 20N and E of 130W in northerly
swell. Moderate to fresh winds are also found elsewhere from 10N
to 20N to the W of 130W around Amanda. A 1010 mb low pressure
area is analyzed and embedded in the monsoon trough near
10.5N108.5W. Moderate to fresh winds are found within 120 nm in
the SE semicircle of the low. To the E, fresh to strong SW-W
winds prevail N of 05N and E of 105W associated with recently
upgraded Tropical Storm Boris offshore Mexico and low pressure,
Invest EP92, offshore Central America. Winds are moderate or
weaker across the remainder of the open waters. Cross-equatorial
long period southerly swells dominate the waters S of 20N and E
of 130W with seas of 8-12 ft, highest in the SE semicircle of the
embedded low and with the fresh to strong winds E of there. 6-8
ft seas are across the remainder of the waters.

For the forecast, the Remnant Low of Amanda will continue to spin
down and weaken early in the week, pushing W of 140W Tue.
Moderate to locally fresh trades will continue to dominate the
waters N of 10N and W of 120W under ridging for the early part of
the week, then will weaken as the gradient weakens by the middle
through the end of the week. Winds will be moderate or weaker
elsewhere for the start of the week, except higher near the
offshore waters of southern Mexico and northern Central America
near Boris and Invest EP92. Meanwhile, northerly swell in the
north-central waters will produce seas of 7-10 ft for the next
several days. Large long period cross-equatorial southerly swell
will continue northward through the regional waters through
the early part of the week. Seas S of 20N and E of 120W will
peak at 10-13 ft seas through tonight before gradually subsiding
Tue through Wed.

$$
Lewitsky