000
AXPZ20 KNHC 070341
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC MON JAN 07 2013

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.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH ALONG 08N82W TO 06N91W THEN ITCZ TO 05N103W TO 
08N116W TO 06N140W.  ISOLATED MODERATE CONVECTION WITHIN 90 NM 
OF AXIS FROM 112W TO 130W.

...DISCUSSION...
LARGE MID TO UPPER LEVEL RIDGE COVERS WESTERN HALF OF BASIN AND 
BRINGS PLENTY OF TROPICAL MOISTURE BACK INTO E PAC.  RIDGE CREST 
IS FLATTENED BY UPPER LEVEL CYCLONE CENTERED OVER NEVADA AND 
SUPPORTING SURFACE LOW PRES CENTER 1012 MB AND COLD FRONT WITH 
AMPLE SUPPLY OF MOISTURE AND ENERGY TO BRING STRONG SURFACE 
WINDS INTO NORTHERN PART OF GULF OF CALIFORNIA BY LATE MON.  
LONGWAVE UPPER LEVEL TROUGH EXTENDS FROM CYCLONE ACROSS CENTRAL 
MEXICO TO 00N88W.  MODERATE SUBSIDENCE ALOFT MAINTAINS DRY AND 
STABLE AIR MASS E OF 110W.  

ELSEWHERE AT THE LOWER LEVELS...
BROAD AND VERY STRONG 1035 MB HIGH PRES CENTER AT 33N141W BRINGS 
STRONG TO NEAR GALE FORCE TRADES AND SEAS ABOVE 15 FT TO WESTERN 
E PAC FROM 08N TO 25N W OF 120.  MODERATE SWELLS SPREAD 
THROUGHOUT REMAINDER OF BASIN W OF 110W.  

GAP WINDS...
COLD FRONT ACROSS GULF OF MEXICO MOVES E AND GALE FORCE WINDS 
CROSSING INTO GULF OF TEHUANTEPEC ARE EXPECTED TO DIMINISH 
BELOW GALE FORCE LATE MON NIGHT AND GET BELOW 20 KT BY LATE TUE. 
CURRENT SEAS OF 15 FT SHOULD SUBSIDE ALONG WITH WINDS. 

GULF OF PAPAGAYO...FRESH TO STRONG WINDS EXPECTED TO PULSE 
THROUGH TUE MORNING AS CARIBBEAN TRADES REMAIN NEAR GALE FORCE.  
STRONGEST WINDS OCCUR IN THE LATE NIGHT AND EARLY MORNING HOURS 
AS DRAINAGE FLOW PEAK.

$$
WALLY BARNES