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Eastern Pacific Tropical Weather Discussion



000
AXPZ20 KNHC 260301
TWDEP 

TROPICAL WEATHER DISCUSSION...UPDATED                            
NWS NATIONAL HURRICANE CENTER MIAMI FL                       
0405 UTC SAT JUL 26 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 
0300 UTC.

...SPECIAL FEATURES...

TROPICAL STORM GENEVIEVE CENTERED NEAR 12.1N 136.1W AT 26/0300 
UTC MOVING WEST OR 270 DEGREES AT 4 KT. ESTIMATED MINIMUM 
CENTRAL PRESSURE IS 1004 MB. MAXIMUM SUSTAINED WINDS 40 KNOTS 
WITH GUSTS TO 50 KNOTS. SCATTERED MODERATE TO STRONG WITHIN 120 
NM SE SEMICIRCLE OF CENTER. LITTLE CHANGE IN INTENSITY EXPECTED 
DURING THE NEXT 24 TO 36 HOURS. PLEASE SEE LATEST NHC FORECAST/ 
ADVISORY UNDER AWIPS/WMO HEADERS MIATCMEP2/WTPZ22 KNHC FOR MORE 
DETAILS.

A 1007 MB AREA OF LOW PRES EMBEDDED WITHIN THE MONSOON TROUGH 
NEAR 14N125W PRODUCING NUMEROUS MODERATE SCATTERED STRONG 
CONVECTION WITHIN 90 NM S SEMICIRCLE OF THE LOW. THE LATEST NHC 
TROPICAL WEATHER OUTLOOK GIVES THIS LOW PRES AREA A HIGH CHANCE 
OF DEVELOPING INTO A TROPICAL CYCLONE DURING THE NEXT 48 HOURS 
AS THE SYSTEM MOVES TOWARD THE W OR W-NW AT ABOUT 10 KT.

A 1007 MB AREA OF LOW PRES EMBEDDED WITHIN THE MONSOON TROUGH 
NEAR 12N105W PRODUCING NUMEROUS MODERATE SCATTERED STRONG 
CONVECTION WITHIN 90 NM OF THE LOW. THE LATEST NHC TROPICAL 
WEATHER OUTLOOK GIVES THIS LOW PRES AREA A HIGH CHANCE OF 
DEVELOPING INTO A TROPICAL CYCLONE DURING THE NEXT 48 HOURS AS 
THE SYSTEM MOVES TOWARD THE NW AT ABOUT 10-15 KT.

...TROPICAL WAVES...

A WEAK TROPICAL WAVE IS ALONG 116W FROM 10N TO 19N...MOVING WEST 
AT 15 KT. NO DEEP CONVECTION.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...            
MONSOON TROUGH EXTENDS FROM 08N87W TO 09N86W TO 06N92W TO LOW 
PRES NEAR 12N105W 1007 MB TO 10N119W TO LOW PRES NEAR 14N125W 
1007 MB THROUGH T.S. GENEVIEVE TO 12N140W. NUMEROUS MODERATE 
ISOLATED STRONG FROM 06N TO 10N BETWEEN 81W AND 86W.. AND FROM 
04N TO 08N BETWEEN 90W AND 94W. SCATTERED MODERATE WITHIN 90 NM 
EITHER SIDE OF TROUGH AXIS W OF 130W.

...DISCUSSION...                                                

AN ACTIVE MONSOON TROUGH SPAWNING MULTIPLE CYCLONIC CIRCULATIONS 
WITH POTENTIAL TO DEVELOP INTO TROPICAL DEPRESSIONS REMAINS THE 
KEY DOMINANT FEATURE ACROSS THE REGION. UPPER LEVEL ANTICYCLONE 
IN CENTRAL PACIFIC IS CENTERED NEAR 14N159W WITH UPPER RIDGE 
EXTENDING EAST TO 13N142W WHERE IT REACHES THE BASE OF AN UPPER 
TROUGH FROM 30N131W TO 13N142W. AN UPPER LEVEL ANTICYCLONE IS 
CENTERED NEAR 15N101W. DIVERGENT UPPER LEVEL WINDS OVER THE 
MONSOON TROUGH SE OF THE UPPER TROUGH AXIS AND BENEATH THE UPPER 
ANTICYCLONE IS PROVIDING AN EXCELLENT UPPER LEVEL ENVIRONMENT 
FOR ACTIVE CONVECTION ASSOCIATED WITH THE MONSOON TROUGH TO 
OCCUR...FOCUSED ON THE AREAS OF LOW PRESSURE EMBEDDED WITHIN THE 
TROUGH NOTED ABOVE. 

GULF OF PAPAGAYO...STRONG TO NEAR GALE FORCE TRADE WINDS OVER 
THE SW CARIBBEAN WILL RESULT IN ANOTHER PULSE OF 20-25 KT WINDS 
THROUGH THE GULF OF PAPAGAYO TONIGHT INTO SAT MORNING. THESE 
WINDS WILL PULSE AGAIN SAT NIGHT INTO SUN MORNING. SEAS WILL 
BUILD TO 9 FT DURING EACH PULSE. AN ASCAT PASS AT 1500 UTC SHOWS 
20-25 KT WINDS TO 87W. 

GULF OF TEHUANTEPEC...ANOTHER PULSE OF NLY WINDS OF 20-25 KT IS 
EXPECTED N OF 15N IN THE GULF OF TEHUANTEPEC TONIGHT INTO EARLY 
SAT. SEAS SHOULD REACH 8 FT WITH THIS PULSE. AN ASCAT PASS 
SHOWED NLY WINDS OF 20-25 KT ACROSS THIS REGION EARLY THIS 
MORNING. 

SURFACE RIDGE DOMINATES THE REMAINDER OF THE AREA N OF 15N W OF 
115W. PRES GRADIENT BETWEEN THE SOUTHERN PERIPHERY OF THE RIDGE 
AND GENEVIEVE IS PRODUCING AN AREA OF FRESH TRADE WINDS FROM 16N 
TO 20N W OF 132W WITH SEAS TO 7-8 FT. 

$$ 
MUNDELL



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Page last modified: Saturday, 26-Jul-2014 03:01:21 UTC