000
AXPZ20 KNHC 190846
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1005 UTC Fri May 19 2017

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 
0800 UTC.

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

An ill-defined monsoon trough extends from 15N97W TO 11.5N102W 
TO 07.5N118W. The ITCZ axis extends from 07N120W TO 04N134W TO 
beyond 05N140W. Scattered moderate to strong convection is from 
05N to 09N between 87W and 97W, and also from 08N to 11N between 
100W and 105W. Scattered moderate isolated strong convection is 
within 150 nm N of ITCZ between 122W and 137W.

...DISCUSSION...   

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

A broad high pressure ridge across the NE Pacific is producing 
moderate to fresh northwest winds off the coast of the Baja 
California peninsula. Light to gentle winds prevail over most of 
the Gulf of California, and moderate to fresh north-northwest 
winds across far northern portions. Seas are 5-8 ft west of Baja 
California Norte in NW swell, highest north of 29N. Seas are 4-7 
ft west of Baja California Sur, 1-3 ft in the Gulf of 
California, and 4-6 ft elsewhere. Wave model guidance suggests 
that the NW swell will subside through Friday night.

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

Gentle to moderate south to southwest winds are west of Ecuador, 
with light to gentle southwest to west winds elsewhere, except 
light winds north of 09N. Seas are 4-7 ft west of Colombia, 6-8 
ft west of Ecuador, and 4-6 ft elsewhere in southwest swell. The 
swell will continue to propagate northward through Saturday, 
then begin to subside Saturday night and Sunday. 

REMAINDER OF THE AREA... 

Strong high pressure centered north of the area near 37N139W 
extends a ridge southeastward to near the Revillagigedo Islands. 
The pressure gradient between the ridge and lower pressure near 
the ITCZ is maintaining moderate to fresh trades north of the 
ITCZ west of 120W. Seas in the trade wind belt are 6-8 ft from 
mixed northeast wind waves and northwest swell. The high will 
shift northeast and weaken this weekend, allowing the pressure 
gradient to relax with winds and seas diminishing.

$$
Stripling