000
AXPZ20 KNHC 090917
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
0917 UTC Mon Jul 9 2018

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. 

...TROPICAL WAVES...

.A tropical wave is analyzed from 06N108W to 18N107W moving W at
10 to 15 kt. Scattered moderate and isolated strong convection 
are observed from 05N to 13N between 103W and 111W. 

.A tropical wave is analyzed from 06N119W to 19N116W moving W at
10 to 15 kt. Scattered moderate and isolated strong convection 
are observed from 05N to 12N between 115W and 121W. 

.A tropical wave is analyzed from 07N131W to 18N129W moving W at
10 to 15 kt. No deep convection is noted.

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

The monsoon trough extends from 09N83W to 07N95W to 08N106W. The
ITCZ begins near 08N109W and extends to 08N116W, then resumes 
from 08N120W to 07N129W, then resumes again from 08N131W to 
beyond 08N140W. Aside from convection associated with the 
tropical waves, scattered moderate and isolated strong convection 
are from 05N to 09N between 82W and 103W, from 06N to 11N 
between 121W and 126W, and from 02N to 07N E of 82W. 
  
...DISCUSSION...

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

Gulf of Tehuantepec: High pressure north of the region along with
nocturnal drainage flow will support strong northerly winds with
seas up to 9 ft through early this morning. The high will 
strengthen later today through Wed night which will help 
increase the nocturnal winds to near gale force, with fresh to 
strong winds lingering into the daytime hours.
  
A surface trough extends across Baja California, while another 
surface trough is west of Baja California extending from 21N123W
to 28N122W. These troughs support a weak pressure pattern N of 
15N W of 96W across the offshore waters promoting mainly gentle 
winds. The trough W of Baja California is expected to meander 
over the region the next few days, which will help maintain the 
weak flow over the region. 
  
Gulf of California: Gentle to occasionally moderate southerly 
flow expected for the next 48 hours. 

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

Gulf of Papagayo: Strong nocturnal offshore winds, with seas to 
8 ft, will occur across and within 150 nm downstream of the Gulf 
of Papagayo through sunrise on Tue, resuming Thu night.

Gentle to occasionally moderate easterly winds are forecast 
elsewhere north of the monsoon trough which is meandering 
between 06N and 09N. Moderate southerly winds are forecast south 
of the monsoon trough this week with 5 to 8 ft seas primarily 
due to cross-equatorial southerly swell which will subside to 4 
to 7 ft by this evening. 
  
REMAINDER OF THE AREA...
   
The post-tropical remnant low of Fabio has degenerated into a
surface trough with an axis extending from 24N139W to 30N139W, 
moving W. Associated winds have diminished to 20 kt or less. An 
area of 7 to 8 ft seas across the forecast waters W of the trough
will subside to less than 8 ft later this morning. 

A surface trough that extends from 21N123W to 28N122W will 
meander over the region next few of days. Fresh northerly winds,
and 7 to 8 ft seas currently observed N of 28N within 270 nm W 
of the trough, will diminish across the waters S of 30N today, 
but spread back S of 30N on Tue night. 
  
Cross equatorial swell combined with swell propagating W from 
the Gulf of Papagayo will support 7 to 8 ft S of 12N between 80W
and 102W through this afternoon. 
  
$$
Latto