000
AXPZ20 KNHC 240917
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC SUN JAN 24 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 07N78W TO 04N88W TO 06N99W TO 03N122W TO 06N140W. 
SCATTERED MODERATE ISOLATED STRONG CONVECTION WITHIN 90 NM N OF 
AXIS AND 60 NM S OF AXIS E OF 90W. SCATTERED MODERATE ISOLATED 
STRONG CONVECTION WITHIN 150 NM N OF AXIS AND SCATTERED MODERATE 
CONVECTION WITHIN 90 NM S OF AXIS W OF 131W.

...DISCUSSION...
AN UPPER LEVEL RIDGE PREVAILS ACROSS THE AREA N OF 18N. S OF 
18N...AN UPPER LEVEL ANTICYCLONE IS CENTERED NEAR 06N135W IN 
RESPONSE TO ACTIVE CONVECTION IN THE ITCZ W OF 131W. AN UPPER 
LEVEL TROUGH EXTENDS FROM SOUTHERN MEXICO TO 05N110W...WITH 
UPPER RIDGING E OF 94W IN RESPONSE TO ITCZ CONVECTION E OF 90W. 

AT THE SURFACE...HIGH PRES 1022 MB IS CENTERED NEAR 30N122W WITH 
RIDGE EXTENDING SW TO 23N140W. A COLD FRONT REMAINS JUST WEST OF 
THE AREA. THE COLD FRONT WILL MOVE ACROSS THE N PORTION OF THE 
AREA...REMAINING N OF 26N. FRESH TO STRONG SW WINDS WILL BE 
FOUND WITHIN 150 NM E OF THE FRONT. THE SURFACE HIGH PRESSURE 
CENTER WILL REMAIN OVER THE AREA...GENERALLY N OF 25N THROUGH 
THE FORECAST PERIOD...AND WILL MAINTAIN FRESH TO STRONG TRADES 
ACROSS THE TRADEWIND BELT W OF 115W. 

THE LARGE SWELLS AFFECTING THE AREA WILL GRADUALLY SUBSIDE 
THROUGH THE PERIOD...HOWEVER...THEY WILL STILL REMAIN GREATER 
THAN 10 FT ACROSS MUCH OF THE AREA W OF 95W. ANOTHER SET OF LONG 
PERIOD SWELLS GENERATED BEHIND THE FRONT JUST WEST OF THE AREA 
HAS ENTERED THE FAR NW PART. THESE SWELLS WILL SPREAD S AND E 
THROUGH THE FORECAST PERIOD. 

GAP WINDS...
FRESH TO STRONG N WINDS ARE EXPECTED ACROSS THE GULF OF 
TEHUANTEPEC LATE IN THE FORECAST PERIOD AS A COLD FRONT SWEEPS 
ACROSS THE GULF OF MEXICO MON.

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

$$
AL