000
AXPZ20 KNHC 240927
TWDEP 

TROPICAL WEATHER DISCUSSION                                     
NWS NATIONAL HURRICANE CENTER MIAMI FL                         
1005 UTC TUE FEB 24 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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC. 
  
...SPECIAL FEATURE... 

GULF OF TEHUANTEPEC GALE WARNING...STRONG POST-FRONTAL NORTHERLY 
WINDS ACROSS THE WESTERN GULF OF MEXICO WILL SOON RE-ENFORCE THE 
NORTHERLY 20-30 KT FLOW CURRENTLY ACROSS THE GULF OF TEHUANTEPEC 
RESULTING IN 30-35 KT MINIMAL GALE FORCE WINDS THROUGH THIS 
AFTERNOON WITH SEAS BUILDING TO 12 FT. THE PRES GRADIENT WILL 
THEN CONTINUE TO RELAX TONIGHT WITH WINDS BELOW 20 KT BY WED 
MORNING.
                      
...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
            
ITCZ EXTENDS FROM 5N90W TO 5N125W TO 10N13W. SCATTERED MODERATE 
ISOLATED STRONG CONVECTION FROM 6N-18N BETWEEN 123W-126W.
 
...DISCUSSION... 

AN UPPER LEVEL TROUGH IS MOVING ACROSS THE W PORTION OF THE 
DISCUSSION AREA. THE TROUGH EXTENDS FROM 32N136W TO A CYCLONIC 
CIRCULATION NEAR 14N139W TO 5N136W. UPPER LEVEL DIFFLUENCE SE OF 
THE TROUGH IS ENHANCING CONVECTION FROM 6N-18N BETWEEN 123W-
126W. A BROAD UPPER LEVEL RIDGE IS N OF 20N E OF THE TROUGH. A 
BROAD TROUGH IS S OF THE RIDGE. AN UPPER LEVEL ANTICYCLONIC 
CIRCULATION IS CENTERED NEAR 10N94W WITH RIDGE NE INTO SOUTHERN 
MEXICO.

THE PRES GRADIENT BETWEEN A RIDGE TO THE N AND A TROUGH FROM 
19N135W TO 7N138W HAS TIGHTENED THE PRES GRADIENT AND ELY WINDS 
HAVE INCREASED 20 TO 25 KT FROM 18N-23N W OF 129W. THE TROUGH 
WILL WEAKEN AND MOVE E AND THE GRADIENT WILL WEAKEN WITH 
DECREASING WINDS. HOWEVER LARGE SWELLS WILL REMAIN ACROSS THE NW 
PORTION OF THE AREA.

ELY WINDS 20-25 KT WILL CONTINUE TO BLOW THROUGH THE GULF OF 
PAPAGAYO WILL DECREASE TO LESS THAN 20 KT WED.

$$ 
DGS