000
AXPZ20 KNHC 150236
TWDEP 

TROPICAL WEATHER DISCUSSION                  
NWS NATIONAL HURRICANE CENTER MIAMI FL                         
0405 UTC TUE APR 15 2014

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 
0230 UTC. 

...SPECIAL FEATURE...

GULF OF TEHUANTEPEC STORM WARNING 

WINDS OVER THE GULF OF TEHUANTEPEC WILL REMAIN FAIRLY LIGHT 
THROUGH TUESDAY MORNING. A COLD FRONT IN THE NW GULF OF MEXICO 
WILL REACH THE BAY OF CAMPECHE TUE. WINDS WILL RAPIDLY 
INCREASING TO GALE FORCE OVER THE GULF OF TEHUANTEPEC TUE 
AFTERNOON. WINDS ASSOCIATED WITH THIS GAP WIND ARE EXPECTED TO 
REACH EITHER STRONG GALE FORCE OR EVEN MINIMAL STORM FORCE BY 
TUE EVENING. THIS IS EXPECTED TO BE A SHORT LIVED...BUT 
STRONG...GAP WIND EVENT WITH STRONG GALE FORCE WINDS...AND 
POSSIBLY A BRIEF PERIOD OF STORM FORCE WINDS...EXPECTED TUE 
NIGHT INTO WED MORNING. WINDS ARE THEN EXPECTED TO DIMINISH 
BELOW GALE FORCE BY WED AFTERNOON...AND DIMINISH FURTHER TO 20 
KT OR LESS WED EVENING. 

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
 
THE MONSOON TROUGH EXTENDS FROM 08.5N84W TO 06.5N98W WHERE LOW 
LEVEL WINDS SUGGEST A TRANSITION TO ITCZ WHICH EXTENDS TO 
06N135W TO BEYOND 04N140W. SCATTERED MODERATE ISOLATED STRONG 
CONVECTION WAS NOTED WITHIN 90 NM N AND 120 NM S OF TROUGH 
BETWEEN 86W AND 93W. 

...DISCUSSION...                                                

A SURFACE RIDGE EXTENDS INTO THE AREA FROM 30N132W TO 18N110W. 
THE PRESSURE GRADIENT BETWEEN THE RIDGE AND LOWER PRESSURE IN 
THE VICINITY OF THE ITCZ IS MAINTAINING MODERATE TO LOCALLY 
FRESH TRADES N OF THE ITCZ TO 20N AND W OF 130W. LATEST 
ALTIMETER PASS DEPICTS SEAS TO 8 FT OVER THIS AREA. THE WEAK 
RIDGE WILL CONTINUE OVER THE AREA TO MAINTAIN MODERATE TO FRESH 
TRADEWINDS WITH SEAS TO 8 FT OVER MUCH OF THIS AREA. THE RIDGE 
WILL STRENGTHEN SLIGHTLY...AND OCCASIONAL WINDS TO 25 KT WILL BE 
POSSIBLE. 

GULF OF CALIFORNIA...HIGH PRESSURE OVER THE GREAT BASIN WILL 
ALLOW FOR STRONG NW WINDS TO FUNNEL INTO THE NORTHERN GULF OF 
CALIFORNIA TONIGHT. THE AREA OF HIGH PRESSURE WILL SHIFT EAST ON 
TUESDAY WHICH WILL LOOSEN THE PRESSURE GRADIENT AND DIMINISH 
WINDS BELOW 25 KT BY TUE AFTERNOON.
 
$$ 
AL