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Eastern Pacific Tropical Weather Discussion



000
AXPZ20 KNHC 220918
TWDEP 

TROPICAL WEATHER DISCUSSION                                    
NWS NATIONAL HURRICANE CENTER MIAMI FL                       
1005 UTC TUE JUL 22 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 
0830 UTC.

...TROPICAL WAVES...                           

TROPICAL WAVE EXTENDS FROM MEXICO NEAR 15N93W TO 7N93W MOVING W 
NEAR 20 KT OVER PAST 24 HOURS. WAVE IS EMBEDDED WITH AN AREA OF 
DEEP MOISTURE AND COUPLED WITH DIFFLUENT FLOW ALOFT IS 
GENERATING SCATTERED MODERATE TO ISOLATED STRONG CONVECTION FROM 
7N TO 10N BETWEEN 90W AND 97W. 

TROPICAL WAVE FROM 17N120W TO 11N121W MOVING W 5 TO 10 KT OVER 
THE PAST 24 HOURS. THIS IS A WEAK WAVE AND IS EMBEDDED WITHIN 
WEAK UPPER LEVEL FLOW. THIS IS ONLY GENERATING SCATTERED 
MODERATE CONVECTION FROM 15N TO 16N BETWEEN 120W AND 123W. 

TROPICAL WAVE THAT WAS ALONG 139W IS NOW W OF THE DISCUSSION 
AREA. 

A 1008 MB LOW IS EMBEDDED WITHIN THE ITCZ NEAR 10N118W 
GENERATING SCATTERED TO NUMEROUS STRONG CONVECTION FROM 9N TO 
11N BETWEEN 117W AND 119W WITH SCATTERED MODERATE/ISOLATED 
STRONG CONVECTION ELSEWHERE FROM 7N TO 11N BETWEEN 115W TO 119W. 

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...            
MONSOON TROUGH FROM 7N78W ALONG 8N87W TO 7N95W WHERE THE ITCZ 
BEGINS AND CONTINUES ALONG 10N103W TO 10N116W THEN RESUMES NEAR  
10N121W 8N133W TO 10N140W. SCATTERED MODERATE TO STRONG 
CONVECTION IS WITHIN 240 NM N OF ITCZ BETWEEN 101W AND 110W AND 
FROM 8N TO 11N BETWEEN 137W AND 141W. SCATTERED MODERATE TO 
ISOLATED STRONG CONVECTION IS WITHIN 240 NM N OF ITCZ BETWEEN 
114W AND 132W. SCATTERED MODERATE CONVECTION WITHIN 120 NM ALONG 
COAST OF PANAMA AND COSTA RICA S OF 10N W OF 80W. 

...DISCUSSION...                                                
AN UPPER LOW IS S OF MEXICO NEAR 16N108W ENHANCING THE 
CONVECTION N OF THE MONSOON ITCZ MAINLY BETWEEN 101W AND 110W. A 
NARROW UPPER TROUGH IS OVER THE N PORTION OF THE AREA EXTENDING 
THROUGH 32N127W TO 23N124W SUPPORTING A SURFACE TROUGH THAT 
EXTENDS FROM 30N130W TO 26N136W. THIS CONTINUES TO DISRUPT THE 
SUBTROPICAL SURFACE RIDGE BUT IS BEGINNING TO BREAK DOWN WITH A 
1019 MB HIGH E OF THE SURFACE TROUGH NEAR 30N123W AND A SURFACE 
RIDGE EXTENDING S-SW TO 22N117W. AN E/W UPPER RIDGE ANCHORED W 
OF THE DISCUSSION AREA DOMINATES THE REMAINDER OF THE AREA S OF 
20N W OF 127W. THIS SCENARIO IS GIVING AREA S OF THE SURFACE 
RIDGE FRESH TRADE WINDS AND SEAS TO 8 FT. AS THE SURFACE TROUGH  
GRADUALLY WEAKENS LATER TODAY THE SURFACE RIDGE WILL REBUILD AND 
GENERATE FRESH BREEZES ALONG THE BAJA PENINSULA N OF 28N TODAY 
AND STRONG BREEZES BY EARLY WED. 

GAP WINDS...                                                   
GULF OF PAPAGAYO...STRONG TRADE WIND FLOW OVER THE SW CARIBBEAN 
WILL CONTINUE TO ALLOW PULSES OF FRESH TO STRONG GAP WINDS INTO 
THE GULF OF PAPAGAYO OVER THE NEXT FEW MORNINGS WITH SEAS TO 8 
FT TODAY THEN EXPANDING W ON WED WITH SEAS TO 10 FT. 

GULF OF TEHUANTEPEC...NORTH WINDS IN THE SW GULF OF MEXICO 
COUPLED WITH THE PRESENT TROPICAL WAVE WILL GIVE THE GULF OF 
TEHUANTEPEC STRONG BREEZE FOR A SHORT PERIOD THIS MORNING AND 
AGAIN WED MORNING. 

$$ 
PAW



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Page last modified: Tuesday, 22-Jul-2014 09:19:04 UTC