000
AXPZ20 KNHC 260928
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC TUE JAN 26 2010

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. 

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0915 UTC.

...ITCZ...
AXIS ALONG 04N77W TO 02N91W TO 06N118W TO 02N130W TO 02W140W. 
SCATTERED MODERATE ISOLATED STRONG CONVECTION WITHIN 80 NM 
EITHER SIDE OF AXIS E OF 83W. ISOLATED MODERATE CONVECTION 
WITHIN 60 NM N OF AXIS BETWEEN 115W AND 117W. 

...DISCUSSION...
HIGH AMPLITUDE UPPER LEVEL TROUGH WITH AXIS EXTENDING FROM 
30N121W TO 04N140W PREVAILS ACROSS THE W PART OF THE AREA. UPPER 
LEVEL RIDGING PREVAILS ACROSS THE E PART OF THE AREA. ASIDE FROM 
CONVECTION E OF 83W ALONG THE ITCZ...ONLY A FEW SMALL AREAS OF 
CONVECTION ARE NOTED ALONG THE ITCZ W OF 83W. 
  
AT THE SURFACE...A COLD FRONT EXTENDS FROM 30N130W TO 27N140W.  
HIGH PRES 1018 MB IS CENTERED NEAR 24N130W WITH RIDGE SW TO 
22N140W. FRESH TO STRONG NE TRADES CONTINUE IN THE TRADEWIND 
BELT W OF 120W. SLOWLY SUBSIDING NW SWELLS CONTINUE ACROSS THE 
AREA W OF 89W. THE COLD FRONT WILL SKIRT THE NORTHERN FRINGE OF 
THE FORECAST AREA OVER THE NEXT 36 HOURS BEFORE SHIFTING E OF 
THE AREA. HIGH PRESSURE REMAINS ANCHORED N OF 20N...RESULTING IN 
FRESH TO STRONG TRADES S OF THE RIDGE W OF 123W THROUGH THE 
FORECAST PERIOD. A COLD FRONT WILL APPROACH THE NW PART OF THE 
AREA AT THE END OF THE PERIOD...WITH FRESH TO STRONG SW WINDS 
SHIFTING INTO THE FAR NW PART AT 48 HOURS. THIS COLD FRONT WILL 
USHER IN ANOTHER SET OF LONG PERIOD NW SWELLS. 

LATEST ASCAT PASS INDICATED FRESH NW BREEZE CONTINUES IN THE 
GULF OF CALIFORNIA...BUT ARE EXPECTED TO DIMINISH TODAY AS THE 
HIGH PRESSURE THAT WAS SITUATED IN THE GREAT BASIN REGION 
RESPONSIBLE FOR THE TIGHT PRESSURE GRADIENT HAS SHIFTED E.

GAP WINDS...
WINDS CONTINUE TO FUNNEL INTO THE GULF OF TEHUANTEPEC AND A GALE 
WARNING HAS BEEN ISSUED. FRESH TO STRONG E-NE TRADES ACROSS WRN 
CARIBBEAN WILL FILTER INTO E PAC ACROSS GULF OF PAPAGAYO EARLY 
TODAY...AND WILL SPREAD ACROSS GULF OF FONSECA WITHIN 48 HOURS.  
RECENT ASCAT PASS INDICATED FRESH TO STRONG N WINDS HAVE STARTED 
TO FUNNEL INTO GULF OF PANAMA. 

FOR ADDITIONAL INFORMATION PLEASE VISIT 
HTTP://WWW.HURRICANES.GOV/MARINE

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AL