000
AXPZ20 KNHC 130249
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
139 UTC Sat May 13 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 0000 UTC surface analysis and satellite imagery through
0145 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... 
The monsoon trough extends from 11N86W to 09N100W. ITCZ extends 
from 07N108W to 06N120W to 07N132W to 07N140W. Scattered moderate
convection is from 04N to 11N between 85W and 107W...and from 03N
to 10N W of 123W.

...DISCUSSION...   

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...
Earlier scatterometer passes indicated moderate to fresh NW to N
winds across the offshore waters W of 110W. This wind field is 
forecast to increase slightly through the overnight hours into 
Saturday due to a strengthening pressure gradient along coastal 
California and Baja California. Resulting NW swell will build 
combined seas into a range of 8 to 12 by Saturday with the 8 ft 
seas threshold dipping as far south as 24N by Sunday. 
Thereafter...the gradient is expected to relax with winds 
decreasing into gentle to moderate breeze levels the remainder of
Sunday into early next week. Seas will subside gradually through
Monday.

E of 110W...mostly gentle to moderate NW to N winds prevail with
the exception of the zone containing the remnant low circulation 
of Adrian SW of the Gulf of Tehuantepec region near 13N97W. 
Little change is expected through Tuesday with the low pressure 
area remaining weak and nearly stationary.

Within the Gulf of California...S to SW winds are expected to
increase Saturday night into Sunday as an area of low pressure
develops across the SW CONUS. Seas will build generally N of 30N
into a range of 5 to 7 ft. Winds across this area will diminish
by Monday morning. Otherwise...the remainder of the Gulf will be
under the influence of light and variable winds through the
upcoming weekend.

OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND 
WITHIN 750 NM OF ECUADOR...
Gentle to moderate winds will prevail across the forecast waters
the next several days. Seas are in the 4 to 6 ft range and will 
remain through Tuesday. Seas will subside into the 3 to 5 ft 
range by early next week. By mid-week...long period SW swell to 
7 ft may reach the Colombia and Ecuador offshore waters N of the
Equator.

REMAINDER OF THE AREA...
A dissipating cold front extends across the northern portion of 
the discussion area from 30N117W to 26N125W. The front will
become diffuse overnight. High pressure continues building in as
the front dissipates...supporting fresh NE winds N of 22N W of 
126W tonight through Saturday night with seas of 7 to 9 ft. N of
26N and E of 126W...N-NW winds will increase to 20 to 25 kt
overnight and persist through Saturday night with seas building 
to 8 to 12 ft. The seas above 8 ft will gradually subside through
early next week. Moderate to fresh winds will prevail elsewhere 
N of the ITCZ.

$$
HUFFMAN