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AXPZ20 KNHC 060230
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC FRI MAY 06 2016

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 0230 UTC.


...SPECIAL FEATURES...

THE PRESSURE GRADIENT BETWEEN HIGH PRESSURE OVER THE WESTERN GULF OF MEXICO AND THE MONSOON TROUGH IN THE EASTERN NORTH PACIFIC IS HELPING FUNNEL WINDS THROUGH THE CHIVELA PASS THAT ARE REACHING NEAR GALE FORCE OVER THE GULF OF TEHUANTEPEC. WINDS WILL FURTHER INCREASE TO MINIMAL GALE FORCE LATE TONIGHT INTO FRIDAY MORNING. SEAS WILL BUILD TO NEAR 12 FT OVERNIGHT DURING THE PERIOD OF GALE FORCE WINDS. WINDS IN THE GULF OF TEHUANTEPEC WILL DECREASE TO NEAR GALE FORCE FRIDAY AFTERNOON AND CONTINUE THROUGH SAT MORNING. WINDS OVER THE GULF OF MEXICO WILL VEER SAT WHICH WILL DECREASE FUNNELING OF WINDS INTO THE GULF OF TEHUANTEPEC. BY SAT NIGHT WINDS OVER THE GULF OF TEHUANTEPEC ARE EXPECTED TO DIMINISH TO 20 KT OR LESS WITH SEAS SUBSIDING BELOW 8 FT.


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

THE MONSOON TROUGH EXTENDS FROM 10N90W TO 09N100W TO 08N115W. THE ITCZ EXTENDS FROM 08N115W TO BEYOND 05N140W. SCATTERED MODERATE ISOLATED STRONG CONVECTION WAS NOTED WITHIN 180 NM OF THE MONSOON TROUGH BETWEEN 92W AND 100W. SCATTERED MODERATE ISOLATED STRONG CONVECTION WAS NOTED WITHIN 90 NM N AND 150 NM S OF THE MONSOON TROUGH BETWEEN 107W AND 113W. SCATTERED MODERATE ISOLATED STRONG CONVECTION WAS NOTED WITHIN 30 NM OF THE ITCZ BETWEEN 129W AND 133W.


...DISCUSSION...

A DISSIPATING COLD FRONT EXTENDS FROM 30N118W TO 28N117W TO 25N119W. HIGH PRESSURE IS BUILDING IN THE WAKE OF THE FRONT. WINDS ARE REACHING NEAR 25 KT OVER THE NORTHERN WATERS N OF 29N BETWEEN 127W AND 130W. NW TO N SWELLS CONTINUE TO AFFECT THE NORTHERN WATERS. CURRENTLY SEAS GREATER THAN 8 FT ARE COVERING THE WATERS N OF LINE FROM 27N135W TO 24N132W TO 24N136W TO 28N122W WITH PEAK SEAS REACHING NEAR 11 FT. THE COLD FRONT WILL DISSIPATE BY FRIDAY. SEAS WILL CONTINUE TO SUBSIDE AND AREAL COVERAGE OF SEAS 8 FT OR GREATER WILL DECREASE...TO N OF 28N BETWEEN 124W AND 132W BY SAT EVENING.

THE PRESSURE GRADIENT BETWEEN HIGH PRESSURE BUILDING BEHIND THE COLD FRONT MENTIONED ABOVE AND THE ITCZ IS SUPPORTING MODERATE TO FRESH TRADES OVER THE WESTERN WATERS N OF THE ITCZ. THE RIDGE WILL CONTINUE TO BUILD AND PREVAIL OVER THE NORTHERN WATERS...HELPING MAINTAIN THE MODERATE TO FRESH TRADES.

GULF OF CALIFORNIA...FRESH TO STRONG S TO SW WINDS PREVAILS OVER THE NORTHERN GULF OF CALIFORNIA. WINDS ARE EXPECTED TO CONTINUE IN THIS RANGE THROUGH SAT MORNING BEFORE DIMINISHING TO 20 KT OR LESS.

$$ AL

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