000
AXPZ20 KNHC 192111
TWDEP 

TROPICAL WEATHER DISCUSSION                                    
NWS NATIONAL HURRICANE CENTER MIAMI FL                         
2205 UTC THU MAR 19 2015

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 
2100 UTC. 

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
            
THE MONSOON TROUGH EXTENDS FROM 1012 MB LOW PRES NEAR 08N87W TO 
04N95W TO 05N111W. THE ITCZ EXTENDS FROM 06N126W TO BEYOND 
05N140W. NO SIGNIFICANT CONVECTION WAS NOTED.

...DISCUSSION... 

MOSTLY TRANQUIL MARINE AND WEATHER CONDITIONS PERSIST ACROSS THE 
AREA THIS AFTERNOON. HIGH PRESSURE OF 1025 MB CENTERED NEAR 
32N131W EXTENDS A RIDGE SE TO NEAR 20N111W. THE WEAK PRESSURE 
GRADIENT BETWEEN THE AREA OF HIGH PRESSURE AND LOWER PRESSURE IN 
THE VICINITY OF THE ITCZ IS SUPPORTING MODERATE TO FRESH 
TRADEWINDS IN THE WESTERN WATERS S OF 24N AND W OF 125W. THE 
AREA OF HIGH PRESSURE WILL SHIFT SOUTHWARD OVER THE NEXT COUPLE 
OF DAYS. THIS WILL TIGHTEN THE PRESSURE GRADIENT AND STRENGTHEN 
THE TRADES FROM 11N TO 15N W OF 129W BY SAT AFTERNOON. NORTHERLY 
SWELL WITH SEAS GREATER THAN 8 FT CONTINUE TO AFFECT THE FAR 
NORTHERN WATERS N OF 25N BETWEEN 118W AND 125W. SEAS WILL 
SUBSIDE AND FALL TO LESS THAN 8 FT BY FRI AFTERNOON. 
 
OVER THE EASTERN WATERS THERE ARE NO ONGOING GAP WIND EVENTS 
THAT EXCEED 20 KT WINDS OR SEAS TO 8 FT...AND GLOBAL MODELS 
INDICATE THAT NO EVENTS ARE EXPECTED TO DEVELOP DURING THE NEXT 
3-4 DAYS. AS MENTIONED YESTERDAY...THIS IS THE FIRST TIME IN 
SEVERAL WEEKS THAT THERE IS NO GAP WIND ACTIVITY. OBSERVING THE 
SST'S THE PREDOMINANCE OF GAP WINDS FROM THE PAST SEVERAL WEEKS 
IS VERY EVIDENT BY A COLD PLUME EXTENDING DOWNWIND OF THE GULFS 
OF TEHUANTEPEC...PAPAGAYO...AND PANAMA. 

$$
AL