000
AXPZ20 KNHC 122115
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
2115 UTC Fri May 12 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 1800 UTC surface analysis and satellite imagery through
2015 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... 
The monsoon trough extends from 11N86W to low pres near 14N97W 
1009 mb to 06N112W. ITCZ from 06N112W to 05N140W. Scattered
moderate convection is from 05N to 09N between 85W and 93W.
Widely scattered moderate convection is elsewhere from 04N to 
16N E of 106W. Scattered moderate convection is from 03N to 08N 
W of 126W.

...DISCUSSION...   

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...
Latest scatterometer passes from earlier this afternoon indicate
moderate to fresh NW to N winds across the offshore waters W of
110W. This wind field is forecast to increase 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 night 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 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 30N120W to 25N140W. The front will 
dissipate through tonight. High pressure will build in wake of 
the front...supporting fresh winds N of 22N W of 126W tonight 
through Saturday night with seas of 8 to 9 ft. N of 26N and E of
126W...N-NW winds will increase to 20 to 25 kt by tonight 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