000
AXPZ20 KNHC 042004 RRA
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC WED APR 4 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 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2000 UTC.

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

A SURFACE TROUGH EXTENDS FROM 08N83W AND CONTINUES ALONG 05N94W TO 
02N104W. THE ITCZ EXTENDS FROM THAT LAST COORDINATE TO 04N120W TO 
06N140W. ISOLATED SHOWERS AND TSTMS ARE WITHIN 75 NM EITHER SIDE OF 
THE TROUGH EAST OF 95W. SCATTERED MODERATE CONVECTION IS FROM 04N TO 
10N WEST OF 128W.

...DISCUSSION...

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

A SURFACE RIDGE ANCHORED BY A 1020 MB HIGH NEAR 29N126W EXTENDS SE 
ACROSS THE OFFSHORE FORECAST WATERS TO NEAR THE REVILLAGIGEDO 
ISLANDS, THUS MAINTAINING GENTLE TO MODERATE NW WINDS AND SEAS TO 6 
FT. LITTLE CHANGE IS FORECAST THROUGH SAT MORNING AS THE RIDGE 
STALLS WHILE IT GRADUALLY WEAKENS BEFORE DISSIPATING. STRONGER HIGH 
PRESSURE BUILDING WEST OF THE AREA WILL DRIFT EAST-NORTHEAST DURING 
THE WEEKEND, THUS RESULTING IN THE DEVELOPMENT OF FRESH TO STRONG NW 
WINDS OFF BAJA CALIFORNIA NORTE WITH SEAS TO 8 FT. WINDS AND SEAS 
WILL DIMINISH MON AS THE RIDGE WEAKENS.

STRONG HIGH PRESSURE OVER THE CENTRAL U.S. WILL SHIFT EAST-SOUTHEAST 
THU MORNING ALLOWING FOR A BRIEF EVENT OF FRESH TO STRONG GAP WINDS 
IN THE GULF OF TEHUANTEPEC. WINDS AND SEAS UP TO 8 FT ARE FORECAST 
TO DIMINISH THU AFTERNOON. 

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

GULF OF PAPAGAYO: MODERATE TO FRESH NE TO E GAP WINDS AND 3-4 FT 
SEAS IS FORECAST THU AND FRI MORNINGS. LIGHT TO GENTLE VARIABLE 
WINDS IS EXPECTED DURING THE REMAINING FORECAST PERIOD. 

GULF OF PANAMA: LIGHT TO GENTLE VARIABLE WINDS WILL PREVAIL THE 
ENTIRE FORECAST PERIOD WITH 3-4 FT SEAS.

LIGHT AND GENTLE WINDS ARE GENERALLY EXPECTED ELSEWHERE.

REMAINDER OF THE AREA... 

A BROAD RIDGE ANCHORED BY A 1022 MB HIGH NEAR 29N126W DOMINATES THE 
FORECAST WATERS. THE HIGH IS EXPECTED TO REMAIN NEARLY STATIONARY 
THROUGH EARLY SAT THUS SUPPORTING MODERATE TO FRESH NE TO E WINDS N 
OF THE ITCZ. 

A COLD FRONT APPROACHING 140W WILL SUPPORT FRESH TO STRONG SOUTHERLY 
WINDS WITH SEAS OF 8-9 FT NW OF A LINE FROM 30N135W TO 28N140W THU 
NIGHT THROUGH FRI NIGHT. 

$$
RAMOS