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Eastern North Pacific Tropical Weather Discussion


000
AXPZ20 KNHC 090303
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
0405 UTC Tue Jun 9 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
0200 UTC.

...SPECIAL FEATURES...

Tropical Storm Boris is centered near 16.0N 98.3W at 09/0300
UTC, moving north at 2 kt. Estimated minimum central pressure is
1001 mb. Maximum sustained wind speed is 40 kt with gusts to 50
kt. Peak seas are currently around 18 ft or 5.5 m. Numerous
moderate isolated to scattered strong convection is noted from
06N to 19N between 94W and 107W. Boris is moving slowly toward 
the north, and a turn toward the northwest and an increase in 
forward speed is expected overnight. On the forecast track, the 
center of Boris should reach the coast of Oaxaca and Guerrero, 
Mexico, late tonight into Tue morning. Little change in strength 
is forecast until landfall. Rapid weakening will occur after the 
center crosses the coast of southern Mexico. Heavy rainfall 
associated with Tropical Storm Boris will impact portions of 
southern Mexico. This rainfall will likely 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 
Boris NHC Forecast/Advisory and Public Advisory at 
www.hurricanes.gov for more details.

Tropical Storm Cristina is centered near 12.5N 87.8W at 09/0300
UTC, moving north at 2 kt. Estimated minimum central pressure is
1004 mb. Maximum sustained wind speed is 40 kt with gusts to 50
kt. Peak seas are currently around 18 ft or 5.5 m. Numerous
strong convection is noted within 180 nm in the E semicircle and
90 nm W semicircle. Scattered moderate convection is noted
elsewhere from 04N to 14N between 78W and 94W.  Cristina is 
moving slowly toward the north, and a slow meandering motion is 
forecast for the next day or so followed by a slow northwestward 
motion. On the forecast track, Cristina should move near or along
the coast of Nicaragua, Honduras and El Salvador over the next 
couple of days. Little change is strength is forecast over the
next day or two. Heavy rainfall associated with Tropical Storm
Cristina will impact coastal portions of Central America through
Thu. 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 Cristina NHC Forecast/Advisory and Public 
Advisory at www.hurricanes.gov for more details.

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

A monsoon trough extends from northern Colombia to across the SW
Caribbean Sea and along northern Panama to Costa Rica near 10N83W
to 10.5N86W where it ends due to Tropical Storm Cristina to the
NW, then resumes well SW of Tropical Storm Boris from 10N102W to
07N116W to 08N123W. The ITCZ extends from 08N123W to 11N137W then
resumes W of 140W. Associated and nearby convection is described
above with Tropical Storm Boris and Tropical Storm Cristina.

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

Please see the Special Features section for details on Tropical 
Storm Boris approaching the coast of southern/SW Mexico.

Otherwise, a broad ridge extends from a 1028 mb high NE of the 
Hawaiian Islands near 34N147W southeastward to near the 
Revillagigedo Islands. Broad low pressure extends from southern 
California SSE across the eastern coast of Baja California Norte.
This pattern is supporting light to gentle NW to N winds W of 
110W including offshore Baja California, where seas are mainly 
7-9 ft in a mix of converging S-SW and shorter period NW swell. 
Gentle NW winds across the waters of Baja Sur turn westerly 
around the coast at Cabo San Lucas resulting in fresh to locally 
strong westerly winds wrapping around the southern tip of Baja 
California, while a few areas of moderate W gap winds prevail 
inside the southern Gulf of California. Moderate S to SW winds 
are in the northern Gulf of California N of 30N and W of 114W. 
Gentle to moderate NW winds are found from 15N to 22N, then 
become fresh to strong from Cabo Corrientes to the area 
surrounding Boris. Seas are 7-15 ft E of 110W to the W and S of 
Boris, and large cross-equatorial SW swell continues to move into
the area waters. In the Gulf of California, seas are 2-3 ft N of
30N, 1-3 ft across the remainder of the northern and central 
Gulf, and 4-7 ft in the southern Gulf with southerly swell moving
through the entrance. 

For the forecast, Tropical Storm Boris will move inland and weaken
to a tropical depression near 16.6N 98.7W Tue morning, inland to
17.5N 99.8W Tue evening, and dissipate Wed morning. Elsewhere, 
a broad surface ridge will sustain gentle to moderate NW winds 
across the Baja Norte waters through Wed, and across the Baja Sur
to Revillagigedo Islands through early Wed 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 S-SW swell will 
continue to impact southern and southwestern Mexico waters 
through Tue night, and the Baja California waters through Wed, 
and will generate very large and powerful coast along the local 
coasts and offshore reefs. This swell will also merge with 
shorter period NW swell across the Baja waters. Marine conditions
should significantly improve by the end of the week and into the
upcoming weekend, 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 Tropical 
Storm Cristina, just offshore of the Gulf of Fonseca. Numerous 
deep convection continues to impact much of the offshore waters 
from Costa Rica to central Nicaragua, due to the well defined 
monsoonal circulation and Cristina. Additional details are also 
described above.

Fresh to strong SW to W winds dominate the waters south of 
Cristina to 08N between 86W and 92W, except weaker winds
nearshore western El Salvador as well as nearshore Guatemala.
Winds are gentle to moderate across the remainder of the waters
including southern Costa Rica, Panama, Colombia, and Ecuador.
Large, long period cross-equatorial southerly swell continues to
impact the offshore waters of Central America and northern South
America with seas of 7-11 ft, except higher N of 09N.

For the forecast, Tropical Storm Cristina will move to 12.5N
87.8W Tue morning, 12.7N 87.9W Tue evening, 13.0N 88.5W Wed 
morning, move inland and weaken to a tropical depression near 
13.7N 89.7W Wed evening, inland to 14.6N 90.4W Thu morning, and 
dissipate Thu evening. Otherwise, large, cross-equatorial S-SW 
swell with seas of 8-15 ft will continue to impact the area 
waters through the early part of the week resulting in large and 
powerful surf along the coasts. Refer to your local 
meteorological information for more details on the surf zone and 
beach impacts. Mainly gentle to moderate winds will prevail away 
from Cristina through the week.

...REMAINDER OF THE AREA...

The 1009 mb Remnant Low of Amanda is analyzed near 10.5N138.5W. 
Isolated moderate convection is noted within 150 nm in the NW
semicircle of the low. Fresh to strong winds are found within
180 nm in the NW semicircle, while seas of 7-10 ft are found from
10N to 16N between 130W and 140W. Otherwise, a broad ridge 
extends from a 1028 mb high NE of the Hawaiian Islands near 
34N147W southeastward to near the Revillagigedo Islands. Moderate
to fresh N to NE winds are found elsewhere S of the ridge to 12N
and W of 120W. Seas are 6-9 ft elsewhere N of 10N and W of 120W
as well as across the waters E of 120W, higher N of 08N and E of
102W closer to Tropical Storm Boris and Tropical Storm Cristina.
Seas are 6-7 ft S of 10N and W of 120W.

For the forecast, the Remnant Low of Amanda will continue to 
spin down and weaken early in the week, moving 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 Cristina. Meanwhile, northerly swell in the 
N-central waters will produce seas of 7-10 ft for the next 
several days. Large cross-equatorial southerly swell will 
continue northward through the regional waters through the early 
part of the week and merge with the northerly swell. Seas S of 
20N and E of 120W will peak at 10-15 ft seas through tonight 
before gradually subsiding Tue through Wed.
 
$$
Lewitsky