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000
AXPZ20 KNHC 270835
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC FRI MAR 13 2015

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 0300 UTC.


...SPECIAL FEATURES...

HIGH PRES BUILDING BEHIND A STRONG COLD FRONT MOVING THROUGH THE GULF OF MEXICO THIS WILL TIGHTEN THE PRES GRADIENT ACROSS SOUTHERN MEXICO RESULTING GALE FORCE WINDS THROUGH THE GULF OF TEHUANTEPEC LATER TODAY. WITH WINDS INCREASE TO AROUND 40 KT AND SEAS BUILDING TO 17 FT BY EARLY SAT. WINDS WILL LIKELY REMAIN NEAR GALE FORCE SAT NIGHT BEFORE SLOWLY DIMINISHING BELOW GALE FORCE SUNDAY MORNING...WITH WIND AND SEAS THEN SUBSIDING QUICKLY SUN AFTERNOON AND EVENING.


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

MONSOON TROUGH FROM 06N93W TO 1013 MB LOW PRES 06N111W 05N123W. ITCZ EXTENDS FROM 05N123W TO 05N140W. SCATTERED MODERATE ISOLATED STRONG CONVECTION NOTED WITHIN 120 NM EITHER SIDE OF TROUGH FROM 06N90W TO 05N102W. SCATTERED MODERATE ISOLATED STRONG FROM 04N TO 11N BETWEEN 110W AND 117W.


...DISCUSSION...

AN UPPER LEVEL TROUGH HAS MOVED INTO THE FAR NW PORTION OF THE DISCUSSION AREA EXTENDING FROM 32N138W TO 25N140W. AN UPPER LEVEL RIDGE E OF THE TROUGH EXTENDS FROM 32N122W TO 20N125W. AN EAST TO WEST UPPER LEVEL TROUGH WITH AXIS FROM NORTHERN MEXICO ACROSS NORTHERN BAJA CALIFORNIA TO 28N120W. A 90 TO 100 KT JETSTREAM IS S OF THE TROUGH FROM 21N118W INTO CENTRAL MEXICO. IN THE DEEP TROPICS AN UPPER LEVEL RIDGE EXTENDS FROM AN ANTICYCLONIC CIRCULATION NEAR 9N18W WITH RIDGE TO 15116W.

A COLD FRONT IN THE NW PORTION OF THE AREA EXTENDING FROM 32N134W TO 27N140W. NW SWELL TO 9 FT WILL BUILD NW OF THE FRONT. THE FRONT WILL DISSIPATE SAT. OTHERWISE A SURFACE RIDGE IS N OF 15N W OF 115W. CROSS EQUATORIAL SW SWELL IS S OF 15N BETWEEN 95W- 120W.

$$ DGS

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