000
AXPZ20 KNHC 130905
TWDEP 

TROPICAL WEATHER DISCUSSION                                     
NWS NATIONAL HURRICANE CENTER MIAMI FL                          
1005 UTC TUE MAY 13 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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC. 

...SPECIAL FEATURE... 

.GULF OF TEHUANTEPEC GALE WARNING...

A COLD FRONT WILL MOVE OFF OF THE TEXAS COAST INTO THE 
NORTHWESTERN GULF OF MEXICO LATE TODAY. THE FRONT WILL MOVE 
ACROSS THE GULF OF MEXICO...REACHING THE BAY OF CAMPECHE BY 
WEDNESDAY EVENING. WINDS WILL FUNNEL THROUGH THE CHIVELA PASS 
AND BRING A LATE-SEASON GULF OF TEHUANTEPEC GALE FORCE GAP WIND 
EVENT STARTING WEDNESDAY NIGHT...ONE OF THE LATEST GULF OF 
TEHUANTEPEC GALES ON RECORD. WINDS WILL REACH 40 KT LATE WED 
NIGHT INTO EARLY THU...AND MAY EVEN REACH 45 KT LATE THU NIGHT 
INTO FRI. WINDS SHOULD FINALLY DIMINISH BELOW GALE FORCE AROUND 
SATURDAY MORNING.

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

THE MONSOON TROUGH EXTENDS FROM 09N86W TO 09N107W TO 06N121W 
WHERE LOW LEVEL WINDS SUGGEST A TRANSITION TO ITCZ WHICH EXTENDS 
THROUGH 05N140W. SCATTERED MODERATE CONVECTION WAS NOTED WITHIN 
150 NM OF TROUGH BETWEEN 108W AND 115W.

...DISCUSSION...                                                 

HIGH PRESSURE OF 1026 MB IS CENTERED WELL N OF THE AREA NEAR 
45N128W EXTENDING A WEAK RIDGE OF HIGH PRESSURE SE TO NEAR  
23N117W. THE WEAK PRESSURE GRADIENT BETWEEN THIS AREA OF HIGH 
PRESSURE AND LOWER PRESSURE IN THE VICINITY OF THE ITCZ IS ONLY 
CAPABLE OF SUPPORTING MODERATE TRADEWINDS OVER THE WESTERN 
WATERS N OF THE ITCZ. THE PRESSURE GRADIENT IS EXPECTED TO 
REMAIN WEAK FOR THE NEXT SEVERAL DAYS MAINTAINING THE MODERATE 
TRADES OVER THIS AREA WITH SEAS REMAINING BELOW 8 FT. 
 
GULF OF CALIFORNIA...HIGH PRESSURE PREVAILING OVER THE GREAT 
BASIN IS MAINTAINING A PRESSURE GRADIENT CAPABLE OF SUPPORTING 
FRESH TO STRONG NW WINDS OVER THE NORTHERN PORTION OF THE GULF 
OF CALIFORNIA. THE FRESH TO STRONG WINDS WILL CONTINUE OVER THE 
NEXT COUPLE OF DAYS BEFORE DIMINISHING BELOW 25 KT THURSDAY. 
SEAS WILL BUILD AS HIGH AS 8 FT IN THIS AREA. 

$$
AL