000
AXPZ20 KNHC 271536
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC FRI NOV 27 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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
1500 UTC.               

...SPECIAL FEATURES...                                         
HURRICANE SANDRA IS CENTERED NEAR 19.6N 108.4W AT 27/1500 UTC OR
ABOUT 160 NM SW OF LAS ISLAS MARIAS MEXICO AND ABOUT 245 NM SSW
OF MAZATLAN MEXICO MOVING N-NE AT 10 KT. ESTIMATED MINIMUM
CENTRAL PRESSURE IS 972 MB. MAXIMUM SUSTAINED WIND SPEED IS 85
KT WITH GUSTS TO 105 KT. SCATTERED TO NUMEROUS MODERATE
CONVECTION IS FROM 18N TO 23N BETWEEN 103W AND 110W. SCATTERED
MODERATE CONVECTION IS ELSEWHERE FROM 16N TO 26N BETWEEN 101W
AND 109W. SEE LATEST NHC INTERMEDIATE PUBLIC ADVISORY UNDER
AWIPS/WMO HEADERS MIATCPEP2/WTPZ32 KNHC AND THE FULL FORECAST/
ADVISORY UNDER AWIPS/WMO HEADERS MIATCMEP2/WTPZ22 NHC FOR MORE
DETAILS.
 
...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...            
THE MONSOON TROUGH IS ALONG 06N77W TO 06N79W TO 08N85W TO
07N94W...THEN RESUMES NEAR 15N112W TO 07N122W. THE INTERTROPICAL
CONVERGENCE ZONE AXIS EXTENDS FROM 07N122W TO 05N126W TO
04N140W. ISOLATED MODERATE CONVECTION IS FROM 02N TO 07N E OF
87W...AND FROM 06N TO 10N BETWEEN 123W AND 125W.

...DISCUSSION...                                               
A STRONG PRESSURE GRADIENT IS SUPPORTING A BAND OF FRESH TO
STRONG NE WINDS FROM GENERALLY FROM 19N TO 25N BETWEEN 121W AND
130W AND FROM 15N TO 25N W OF 130W WITH COMBINED SEAS OF 8 TO 12
FT IN MIXED NW AND NE SWELL. ELSEWHERE THIS LONG PERIOD NW SWELL
IS MIXING WITH NE WIND WAVES AND SE SWELL FROM SANDRA...
RESULTING IN COMBINED SEAS OF 8 TO 11 FT GENERALLY FROM 14N TO
26N BETWEEN 112W AND 125W. THE AREA OF FRESH TO STRONG TRADES IS
EXPECTED TO SHIFT WEST-SOUTHWESTWARD AS RIDGING BUILDS
SOUTHEASTWARD ACROSS THE NORTHERN FORECAST WATERS THROUGH SUN.
BY SUN AS THE AREA OF TRADES WEAKENS AND SHRINKS IN AREAL
COVERAGE...8 TO 11 FT COMBINED SEAS ARE FORECAST TO PREVAIL W OF
A LINE FROM 06N125W TO 18N116W TO 25N133W TO 30N133W WITH SEAS
RANGING FROM 8 TO 11 FT.

GAP WINDS...
GULF OF TEHUANTEPEC...THE NORTHERLY WIND FLOW ACROSS AND
DOWNSTREAM OF THE GULF PREVAILS AT 20 TO 25 KT WITH MAXIMUM SEAS
TO 8 FT. EXPECT N-NE PULSES OF 20-30 KT ACROSS THE GULF WATERS
TO AS FAR S AS 12.5N97W THE NEXT TWO DAYS. MINIMAL GALE FORCE
CONDITIONS POTENTIALLY DEVELOPING ON SUN NIGHT INTO EARLY MON.

GULF OF PAPAGAYO...A TIGHT PRESSURE GRADIENT ACROSS THE SW
CARIBBEAN AND MAXIMUM NOCTURNAL DRAINAGE FLOW WILL CONTINUE TO
SUPPORT PULSES OF NE TO E 20 TO 25 KT WINDS ACROSS THE GULF OF
PAPAGAYO AND DOWNSTREAM TO AROUND 89W...WITH SEAS BUILDING TO 8
FT.
 
$$
HUFFMAN