000
AXPZ20 KNHC 260325
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC FRI FEB 26 2010

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

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0315 UTC.

...ITCZ...

THE AXIS IS CENTERED ALONG 06N77W TO 01N95W TO 05N111W TO 
06N133W TO 05N140W. SCATTERED MODERATE ISOLATED STRONG 
CONVECTION WITHIN 210 NM S OF AXIS BETWEEN 89W AND 96W. 
SCATTERED MODERATE ISOLATED STRONG CONVECTION WITHIN 60 NM 
EITHER SIDE OF AXIS BETWEEN 121W AND 128W. SCATTERED MODERATE 
CONVECTION WITHIN 90 NM N OF AXIS AND 180 NM S OF AXIS W OF 
134W. 

...DISCUSSION...
IN THE UPPER LEVELS N OF 20N AN UPPER LEVEL TROUGH PREVAILS OVER 
THE E PART OF THE AREA WITH AXIS EXTENDING ACROSS THE BAJA 
PENINSULA TO NEAR 20N116W. A SHORT WAVE RIDGE IS LOCATED W OF 
THIS FEATURE WITH AN UPPER LEVEL TROUGH JUST ENTERING THE FAR NW 
PART OF THE AREA. PERSISTENT SUBTROPICAL JET ACROSS THE REGION 
EXTENDS FROM NEAR 10N140W ENE ACROSS MEXICO INTO THE GULF OF 
MEXICO. S OF THE SUBTROPICAL JET IS AN UPPER LEVEL RIDGE ALONG 
5N E OF 125W. 

AT THE SURFACE...HIGH PRES CENTERED NEAR 28N128W HAS WEAKENED TO 
1023 MB. THERE IS STILL A LARGE AREA OF FRESH TO STRING TRADES 
ALONG THE TRADEWIND BELT W OF 118W. A COLD FRONT HAS MOVED INTO 
THE FAR NW PORTION OF THE AREA. THIS COLD FRONT WILL BE 
ACCOMPANIED BY NW WINDS TO 30 KT AND LARGE NW SWELL...DRIVING 
COMBINED SEAS TO ABOUT 23 FT BEHIND THE FRONT. AS THE UPPER 
TROUGH AND ASSOCIATED COLD FRONT SHIFT E ACROSS THE N EXTENT OF 
THE AREA...THE SURFACE HIGH WILL WEAKEN AND DISSIPATE. THIS WILL 
DECREASE THE COVERAGE OF FRESH TO STRONG TRADES...AND LIMIT THEM 
TO W OF ABOUT 135W BY SAT NIGHT. 

GAP WINDS...
WINDS IN THE GULF OF TEHUANTEPEC HAVE DECREASED BELOW GALE 
FORCE...AND WILL DIMINISH BELOW 20 KT FRI MORNING. YET ANOTHER 
COLD FRONT WILL SHIFT ACROSS THE GULF OF MEXICO FRI NIGHT 
THROUGH SAT. THIS WILL ONCE AGAIN INCREASE WINDS OVER THE GULF 
OF TEHUANTEPEC OVER 20 KT SAT MORNING...AND TO NEAR GALE 
FORCE...AND POSSIBLY GALE FORCE SAT NIGHT. 

WITH THE SURFACE COLD FRONT REACHING AS FAR AS COSTA RICA IN THE 
SW CARIBBEAN...WINDS FUNNELING INTO THE GULF OF PAPAGAYO HAVE 
INCREASED TO 20 KT. AS THE COLD FRONT OVER THE SW CARIBBEAN 
WEAKENS AND DISSIPATES...WINDS FUNNELING INTO THE GULF OF 
PAPAGAYO WILL DECREASE...AND WINDS WILL DIMINISH BELOW 20 KT FRI 
NIGHT. 

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

$$
AL