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456 
AXPZ20 KNHC 240415
TWDEP 

TROPICAL WEATHER DISCUSSION                                      
NWS NATIONAL HURRICANE CENTER MIAMI FL                         
0405 UTC WED SEP 24 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 
WWWW UTC.

...SPECIAL FEATURES...
 
A 1008 MB SURFACE LOW IS EMBEDDED IN THE MONSOON TROUGH NEAR 
15N103W MOVING W TO W-NW NEAR 10 KT. 

SCATTERED MODERATE TO 
STRONG CONVECTION IS FROM 11N TO 14N BETWEEN 101W AND 103W. A 
RECENT SCATTEROMETER PASS SHOWED STRONG WINDS S AND NE OF THE 
LOW. HOWEVER THIS SYSTEM CONTINUES TO SHOW LITTLE CHANGE IN 
ORGANIZATION. AN UPPER RIDGE CONTINUES TO PROVIDE NE SHEAR 
ALOFT. THESE UPPER LEVEL WINDS ARE EXPECTED TO BECOME MORE 
FAVORABLE FOR DEVELOPMENT DURING THE NEXT DAY OR TWO WITH A HIGH 
CHANCE OF TROPICAL DEVELOPMENT IN THE NEXT 48 HOURS. 

...TROPICAL WAVE...                                            
TROPICAL WAVE EXTNEDS FROM 


BASIN N OF 10N ALONG 86W/87W TO 
INLAND OVER CENTRAL AMERICA MOVING W NEAR 15 KT. NO ASSOCIATED 
CONVECTION. 

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

MONSOON TROUGH EXTENDS FROM 

10N85W ALONG 11N89W 15N97W TO 1008 
MB LOW NEAR 14N101W THEN ALONG 8N107W TO 8N115W WHERE THE ITCZ 
BEGINS AND CONTINUES ALONG 5N124W TO 6N140W. SCATTERED MODERATE 
TO ISOLATED STRONG CONVECTION IS FROM 8N-11N BETWEEN 92W-96W AND 
FROM 11N-16N BETWEEN 104W-106W. SCATTERED MODERATE CONVECTION IS 
FROM 5N-7N BETWEEN 80W-88W. 

...DISCUSSION...   

A NARROW UPPER LEVEL TROUGH OVER THE FAR NW PORTION OF THE 
DISCUSSION AREA EXTENDS THROUGH 32N129W TO 25N140W WITH THE 
ASSOCIATED COLD FRONT JUST NW OF THE DISCUSSION AREA. THIS FRONT 
WILL ENTER THE REGION DURING THE NEXT FEW HOURS. LARGE SWELLS IN 
THE 8-10 FT RANGE WILL MOVE INTO THE AREA BEHIND THE FRONT ON 
WED. SE OF THIS UPPER TROUGH IS A LARGE AREA OF STRONG 
SUBSIDENCE WITH DRY/STABLE AIR ALOFT TO 120W. AN UPPER RIDGE IS 
ANCHORED OVER NW MEXICO COVERING THE AREA N OF 8N E OF 127W AND 
CAUSING NE SHEAR ALOFT OVER THE 1008 MB LOW IN THE SPECIAL 
FEATURES.  

THE REMNANT LOW OF POLO IS A LOW LEVEL SWIRL WITH A 1010 MB LOW 
ANALYZED NEAR 21N116W. A WEAK SURFACE RIDGE EXTENDS FROM A 1018 
MB HIGH NEAR 27N133W WITH RIDGE AXIS EXTENDING TO 30N122W. THIS 
RIDGE IS MAINTAINING MODERATE NE-E TRADE WINDS ACROSS THE 
TROPICS W OF 120W TO THE N OF THE MONSOON TROUGH.

$$ 
PAW




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