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Eastern Pacific Tropical Weather Discussion



000
AXPZ20 KNHC 242121
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC THU APR 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 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2100 UTC. 

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

NO MONSOON TROUGH IS PRESENT. ITCZ AXIS EXTENDS FROM 07N81W TO 
08N90W TO 06N100W TO 04N120W TO BEYOND 03N140W. SCATTERED 
MODERATE ISOLATED STRONG CONVECTION IS FROM 03N TO 09N BETWEEN 
85W AND 91W. SCATTERED MODERATE CONVECTION IS FROM 01N TO 07N 
BETWEEN 98W AND 112W. 

...DISCUSSION...                                       

ALOFT...AN UPPER LEVEL TROUGH IS OVER THE NW CORNER N OF 24N W 
OF 130W WITH UPPER LEVEL MOISTURE. ANOTHER SMALL UPPER LEVEL 
TROUGH IS N OF 20N BETWEEN 105W AND 120W TO INCLUDE OVER BAJA 
CALIFORNIA AND NW MEXICO. IN THE DEEP TROPICS...AN UPPER LEVEL 
HIGH IS CENTERED NEAR 07N132W. ANOTHER LARGE UPPER LEVEL HIGH IS 
CENTERED NEAR 12N100W. UPPER LEVEL DIFFLUENCE S OF THIS CENTER 
IS ENHANCING THE CONVECTION OVER THE ITCZ BETWEEN 98W AND 112W. 
FURTHER E...THE WESTERN PORTION OF ANOTHER UPPER LEVEL RIDGE IS 
E OF 86W TO INCLUDE CENTRAL AMERICA E OF NICARAGUA WITH 
CONSIDERABLE UPPER LEVEL MOISTURE. 

ON THE SURFACE...A 1028 MB HIGH IS LOCATED NEAR 35N153W.  A 
RIDGE AXIS EXTENDS SE ACROSS THE FORECAST WATERS TO NEAR 
18N110W. THE PRESSURE GRADIENT BETWEEN THE RIDGE AND LOWER 
PRESSURE ASSOCIATED WITH THE ITCZ TO THE S IS SUPPORTING FRESH 
TO STRONG WINDS FROM 09N TO 13N W OF 134W WITH SEAS 9 TO 10 FT. 
A LARGER AREA OF MODERATE TO FRESH TRADES SURROUNDS THIS AREA 
WITH 8-9 FT SEAS OVER THE W CENTRAL WATERS. THE TRADES WILL 
DIMINISH TO MODERATE TO FRESH BY 24 HOURS WITH THE AREA OF 8-9 
FT SEAS IN MIXED NE... SW...AND NW SWELL SPREADING EASTWARD TO 
110W ACROSS THE CENTRAL WATERS.

FRESH TO STRONG WINDS ARE N OF THE AREA ALONG THE CALIFORNIA 
COAST. THESE WINDS ARE HELPING TO SUPPORT NW SEAS AT 8-10 FT 
WHICH ARE FEEDING INTO THE WATERS N OF 26N BETWEEN 117W AND 
124W. THESE SEAS WILL SUBSIDE TO LESS THAN 8 FT AROUND FRI 
AFTERNOON...WITH A NEW SET OF NW SWELL ARRIVING SHORTLY 
THEREAFTER AND COVERING THE WATERS N OF 25N BETWEEN 115W AND 
132W BY SAT MORNING.

CROSS-EQUATORIAL SOUTHERLY SWELL AT 8-10 FT COVERS THE WATERS   
S OF A LINE FROM 03.4S90W TO 10N110W TO 10N120W TO 00N134W. THIS 
SWELL WILL CONTINUE TO PROPAGATE TO THE N REACHING THE SW COAST 
OF MEXICO...SOUTHERN GULF OF CALIFORNIA...AND THE PACIFIC COAST 
OF THE BAJA CALIFORNIA PENINSULA LATE TONIGHT INTO EARLY FRI. 
SEAS OF 8-9 FT WILL COVER THE AREA S OF A LINE FROM 15N120W TO 
15N110W TO 10N97W TO 00N81W...EXCEPT WITHIN 240 NM NE OF 
GALAPAGOS ISLANDS FRI EVENING.

OTHERWISE...EXPECT FAIRLY TRANQUIL CONDITIONS IN THE GULFS OF 
TEHUANTEPEC...PAPAGAYO...AND PANAMA THROUGH THE NEXT FEW 
DAYS...WITH WINDS OCCASIONALLY REACHING FRESH LEVELS IN PAPAGAYO 
DURING PEAK NOCTURNAL DRAINAGE FLOW.

$$ 
FORMOSA



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Page last modified: Thursday, 24-Apr-2014 21:21:34 UTC