000
AXPZ20 KNHC 172040
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
2040 UTC Fri Apr 17 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 1800 UTC surface analysis and satellite imagery through
2040 UTC.

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

A surface trough extends from 07N78W to low pressure near 
07N91W to 09N107W. The ITCZ continues from 09N107W to 05N117W to
04N140W. Scattered moderate isolated strong convection is noted 
from 01N to 09N between 86W and 99W. Scattered moderate isolated 
strong convection is noted from 08N to 14N between 103W and 110W.
Scattered moderate convection is noted from 02N to 06N between 
121W and 135W. 

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

High pressure extends west of the offshore waters of Baja
California. Light to gentle winds prevail across the forecast
waters, except moderate to fresh over the northern Gulf of 
California. Seas are in the 3-5 ft range over the open waters, 
4-5 ft over the northern Gulf of California, and 1-2 ft over the 
remainder of the Gulf of California. 

Strong SW winds will affect the Gulf of California N of 30N 
tonight into early Sat in response to a cold front passing 
through tonight. The high pressure ridge W of Baja California 
will weaken through Sun. Gentle to moderate NW winds are 
expected W of Baja California, with light to gentle winds 
prevailing elsewhere into early next week. NW winds W of Baja 
California Norte will strengthen by Tue night as high pressure 
builds in from the NW. Seas over this area will build to 7-9 ft.

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

Moderate to fresh to winds prevail over the Gulf of Papagayo. 
Gentle to moderate winds prevail elsewhere. Seas are in the 6-7 
ft range over the Gulf of Papagayo, and 2-4 ft elsewhere.

The pressure gradient between high pressure N of the area and 
the equatorial trough will support a pulsing of winds to fresh to
strong tonight across the Papagayo region. Light to gentle winds
will prevail elsewhere. 

REMAINDER OF THE AREA...

A ridge extends from high pressure of 1023 mb centered near
27N144W to near 21N116W. The pressure gradient between this area
of high pressure and lower pressure in the vicinity of the ITCZ 
is supporting gentle to moderate winds N of the ITCZ to 20N and 
west of 125W. Low pressure of 1012 mb is centered near 07N91W. 
Latest scatterometer pass indicates gentle to locally moderate 
winds within 180 nm SW quadrant of the low. Light to gentle winds
prevail elsewhere. Seas are in the 5-8 ft range N of 05N and W 
of 120W, and 4-5 ft elsewhere.

The area of high pressure will maintain moderate to locally fresh
winds from 06N to 22N W of 125W until Sat. The high will then 
weaken, which will diminish winds in this region through early
next week. High pressure will build N of the forecast area,
strengthening tradewinds W of 130W. The low will shift west
northwestward the next several days, with mainly gentle to
moderate winds within 120 nm of the center of the low. Light to 
gentle winds are expected elsewhere for the next several days.

Little change in seas is expected through Sun. Long period NW 
swell will combine with NE wind waves building seas N of 10N and
W of 130W to 8-9 ft Mon. These seas will expand eastward to 120W
on Tue.

$$
AL