000
AXPZ20 KNHC 141534
TWDEP 

TROPICAL WEATHER DISCUSSION                                    
NWS NATIONAL HURRICANE CENTER MIAMI FL                       
1605 UTC MON JUL 14 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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1500 UTC.

...TROPICAL WAVES...                           

TROPICAL WAVE AXIS EXTENDS FROM THE SW GULF OF MEXICO ACROSS 
SOUTHERN MEXICO INTO THE AREA NEAR 15N93W TO 09N92W MOVING W AT 
AROUND 15 KT. SCATTERED MODERATE TO STRONG CONVECTION WAS NOTED 
N OF 12N WITHIN 180 NM W OF THE WAVE. THE TROPICAL WAVE HELPED 
FOR NEAR GALE FORCE WINDS IN THE GULF OF TEHUANTEPEC DURING THE 
OVERNIGHT HOURS. FURTHER DISCUSSION ON THE WINDS AND SEAS OVER 
THE GULF OF TEHUANTEPEC FOLLOWS BELOW. 

TROPICAL WAVE AXIS EXTENDS FROM 17N100W TO 07N101W MOVING W AT 
AROUND 15 KT. SCATTERED MODERATE TO STRONG CONVECTION ASSOCIATED 
WITH THIS WAVE WAS NOTED FROM 10N TO 16N BETWEEN 96W-102W.

TROPICAL WAVE AXIS EXTENDS FROM 14.5N134W TO 07N135W MOVING W AT 
AROUND 15 KT. MODERATE CONVECTION ASSOCIATED TO THE WAVE IS 
NOTED FROM 11N TO 14N BETWEEN 130W AND 135W. THIS WAVE HAS 
HELPED FOR A NORTHWARD PERTURBATION WITHIN THE ITCZ.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...  
 
THE MONSOON TROUGH EXTENDS FROM 10N85W TO 06.5N105W WHERE LOW 
LEVEL WINDS SUGGEST A TRANSITION TO ITCZ WHICH EXTENDS TO 
05.5N112W TO 07N118W TO 05.5N123W TO 07N128W TO 06.5N133W TO 
08.5N140W. SCATTERED MODERATE CONVECTION WAS NOTED WITHIN 90 NM 
S OF THE MONSOON TROUGH BETWEEN 100W AND 105W. SCATTERED 
MODERATE ISOLATED STRONG CONVECTION WAS NOTED WITHIN 120 NM OF 
THE ITCZ BETWEEN 113W AND 118W. 
        
...DISCUSSION...                                                
 
HIGH PRESSURE OF 1027 MB CENTERED N OF THE AREA NEAR 37N138W 
EXTENDS A RIDGE SE TO NEAR 22N116W. THE PRESSURE GRADIENT 
BETWEEN THIS AREA OF HIGH PRESSURE AND LOWER PRESSURE IN THE 
VICINITY OF THE ITCZ AND A TROPICAL WAVE ARE HELPING FOR 
MODERATE TO FRESH TRADEWINDS OVER THE WESTERN WATERS. THE FRESH 
TRADEWINDS HAVE HELPED BUILD SEAS TO 8 FT FROM 13N TO 16N W OF 
131W. THIS AREA OF 8 FT SEAS WILL CONTINUE SHIFTING WESTWARD AND 
BY WED MORNING WILL BE FOUND FROM 12N TO 16N W OF 137W.

THE TROPICAL WAVE MENTIONED ABOVE COMBINED WITH NOCTURNAL 
DRAINAGE FLOW HELPED FOR NEAR GALE FORCE WINDS OVER THE GULF OF 
TEHUANTEPEC DURING THE OVERNIGHT HOURS WITH SEAS NEAR 11 FT. 
WINDS HAVE DIMINISHED THIS MORNING AND ARE IN THE 20-25 KT RANGE 
OVER THE GULF OF TEHUANTEPEC. WINDS AND SEAS WILL CONTINUE TO 
DECREASE TODAY WITH WINDS DIMINISHING TO 20 KT OR LESS AND SEAS 
SUBSIDING TO LESS THAN 8 FT BY THIS EVENING. 

WINDS WILL PULSE OVER THE GULF OF PAPAGAYO OVER THE NEXT COUPLE 
OF DAYS. WINDS WILL PEAK NEAR 25 KT DURING THE OVERNIGHT 
HOURS...AND WILL DIMINISH TO 15-20 KT DURING THE AFTERNOON 
HOURS. 
                 
$$ 
AL