000
AXPZ20 KNHC 100229
TWDEP 

TROPICAL WEATHER DISCUSSION                  
NWS NATIONAL HURRICANE CENTER MIAMI FL                         
2205 UTC WED APR 09 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 FEATURES...
       
GULF OF TEHUANTEPEC GALE WARNING

STRONG HIGH PRESSURE THAT WAS CENTERED OVER EASTERN MEXICO HAS 
SHIFTED INTO THE NW GULF OF MEXICO. THIS HAS LOOSENED THE 
PRESSURE GRADIENT FOR WINDS FUNNELING INTO THE GULF OF 
TEHUANTEPEC. STRONG GALE FORCE WINDS REMAIN OVER THE GULF OF 
TEHUNATEPEC. WINDS WILL CONTINUE TO SLOWLY DIMINISH OVER THE 
NEXT COUPLE OF DAYS...TO BELOW GALE FORCE BY THU AFTERNOON...AND 
TO 20 KT OR LESS BY FRI AFTERNOON. SEAS ASSOCIATED WITH THIS GAP 
WIND EVENT CONTINUE TO SLOWLY SUBSIDE WITH SEAS NEAR 17 FT THIS 
EVENING. THE SWELL WILL CONTINUE TO SPREAD S AND W OVER THE NEXT 
COUPLE OF DAYS WHILE SLOWLY SUBSIDING. BY FRI EVENING...SEAS 
GREATER THAN 8 FT WILL REACH AS FAR W AS 118W.

GULF OF PAPAGAYO GALE WARNING

THE COLD FRONT RESPONSIBLE FOR THE STORM EVENT OVER THE GULF OF 
TEHUANTEPEC WILL HELP FOR A RARE GALE FORCE GAP WIND EVENT OVER 
THE GULF OF PAPAGAYO. WINDS OVER THE GULF OF PAPAGAYO HAVE 
REACHED NEAR GALE FORCE THIS EVENING. WINDS WILL FURTHER 
INCREASE AND REACH GALE FORCE LATE TONIGHT WITH THE ADDED 
COMPONENT OF NOCTURNAL DRAINAGE FLOW. WINDS WILL DIMINISH BELOW 
GALE FORCE THU AFTERNOON.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
 
THE MONSOON TROUGH EXTENDS FROM 09N84W TO 07N87W WHERE LOW LEVEL 
WINDS SUGGEST A TRANSITION TO ITCZ WHICH EXTENDS TO 03N103W TO 
04N140W. SCATTERED MODERATE ISOLATED STRONG CONVECTION WAS NOTED 
WITHIN 150 NM S OF ITCZ BETWEEN 88W AND 91W. SCATTERED MODERATE 
CONVECTION WAS NOTED WITHIN 60 NM OF ITCZ BETWEEN 120W AND 130W.

...DISCUSSION...                                                

LOW PRESSURE OF 1008 MB IS CENTERED JUST W OF THE AREA NEAR 
30N141W WITH ASSOCIATED COLD FRONT EXTENDING OVER THE FORECAST 
WATERS FROM 30N135W TO 21N140W. THE PRESSURE GRADIENT OVER THE 
FORECAST AREA IS MAINTAINING MODERATE TO FRESH TRADEWINDS S OF 
20N AND W OF 120W. LINGERING SEAS TO 8 FT ARE FOUND FROM 06N TO 
10N W OF 132W. THIS AREA OF SEAS WILL DIMINISH BELOW 8 FT BY THU 
AFTERNOON. ANOTHER AREA OF SEAS TO 9 FT ARE FOUND S OF 00N 
BETWEEN 104W AND 112W. BY FRIDAY...THIS AREA OF SWELLS WILL MIX 
WITH NE SWELLS GENERATED FROM THE GULF OF TEHUANTEPEC GAP WIND 
EVENT. NW SWELLS WITH SEAS TO 9 FT ASSOCIATED TO THE COLD FRONT 
ARE OVER THE NW WATERS W OF LINE 30N134W TO 24N137W. THE COLD 
FRONT WILL SLOWLY SHIFT EASTWARD TO EXTEND FROM FROM 30N132W TO 
21N140W BY THU AFTERNOON WITH ASSOCIATED SEAS SUBSIDING BELOW 8 
FT. 

$$ 
AL