000
AXPZ20 KNHC 090907
TWDEP

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1005 UTC Tue Jun 9 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 0600 UTC surface analysis and satellite imagery through
0900 UTC.

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

The monsoon trough extends from 10N75W to 08N84W to 14N96W to 
09N121W. The ITCZ continues from 09N121W to beyond 05N140W. A 
cluster of moderate to strong convection is noted from 07N to 11N
between 98W and 101W. Scattered moderate to isolated strong 
convection is observed elsewhere from 09N to 11N between 98W and 
110W, from 05N to 10N between 85W and 94W, and from 04N to 07N W 
of 135W. Clusters of moderate to isolated strong convection are 
over parts of the Gulf of Panama, and just off the coasts of 
West Panama, Costa Rica and Nicaragua.

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

A ridge will dominate the offshore forecast waters of Baja 
California during the next several days producing gentle to 
moderate NW to N winds. The pressure gradient will tighten some
Fri night through Sat night between a 1030 mb high pressure
located NW of the area and lower pressures over the SW CONUS and
NW Mexico. This will support fresh to locally strong NW winds  
mainly N of Punta Eugenia, with seas building to 8-9 ft.

Currently, a NW swell event, with seas in the 8-11 ft range, 
continues to propagate across the waters N of Cabo San Lazaro. 
Seas will gradually subside to less than 8 ft late today.

In the northern Gulf of California, moderate to fresh NW to N 
winds will prevail today, with seas of 3-5 ft. Elsewhere across 
the Gulf, mainly gentle to moderate winds are expected during the
next several days.

Looking ahead, a gap wind event is forecast across the Tehuantepec
region beginning late Thu as a ridge builds across the the eastern 
slopes of the Sierra Madre mountains in Mexico and the western 
Gulf of Mexico. Strong to near gale force northerly winds are 
expected to persist Thu night through Sun night, with seas likely
building to 10-13 ft. There is a chance of winds reaching minimal
gale force at night.

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

Mainly gentle to moderate S to SW winds will prevail across the 
offshore waters. Winds off East Panama and Colombia will increase
to 15 to 20 kt today and tonight. Cross equatorial SW swell will
continue to propagate across the region, with seas building 8-9 
ft between Ecuador and the Galapagos Islands today. Similar wave
heights, associated with the same swell event, are forecast to 
reach the offshore waters of West Panama and Costa Rica tonight 
into Wed, including also the Azuero Peninsula and the entrance to
the Gulf of Panama.

REMAINDER OF THE AREA...

A ridge extends from a high pressure of 1029 mb located near 
34N132W toward Clarion Island. The pressure gradient between the
ridge and lower pressures in the vicinity of the ITCZ continues 
to support an area of moderate to fresh trade winds from 10N to 
20N west of 130W. Recent altimeter satellite data show seas of 
8-9 ft, likely in mixed NE and SW swell.

The ridge is expected to weaken into mid week as a weakening cold
front approaches 30N140W. This will allow the trade winds to 
diminish slightly today but the development of a weak trough 
along the ITCZ west of 130W will keep the gradient tight enough 
to support fresh to locally strong trades winds between 10N and 
20N west of 130W into late week, with seas of 8 to 9 ft in a mix 
of swell and shorter period NE wind waves.

A reinforcing group of southerly swell is reaching the equator, 
and will propagate across the waters south of 10N between 90W 
and 110W through Thu. 

$$
GR