000
AXPZ20 KNHC 302105
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC TUE MAR 30 2010

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

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2100 UTC.

...ITCZ...
AXIS ALONG 03N78W TO 06N91W TO 03N109W TO 05N121W TO 03N131W TO 
TO 04N140W. SCATTERED MODERATE ISOLATED STRONG CONVECTION WITHIN 
90 NM OF AXIS E OF 87W AND WITHIN 90 NM OF AXIS W OF 123W.

...DISCUSSION...
LONG WAVE UPPER LEVEL TROUGH OVER FAR NW PORTION OF BASIN FROM 
32N136W TO 25N140W TO WELL DEFINED CYCLONE AT 20N142W.  LARGE 
AMOUNTS OF TROPICAL MOISTURE BROUGHT INTO E PAC BY 60 KT JET 
CORE SE OF CYCLONE FEED ITCZ CONVECTION WITH HELP OF WEAK 
SURFACE TROUGH ALONG 120W FROM 02N-10N.  MID TO UPPER LEVEL 
RIDGE WITH ANTICYCLONE AT 09N120W EXTEND TO 32N110W.  FURTHER 
DOWNSTREAM...UPPER LEVEL TROUGH FROM PUERTO VALLARTA MEXICO TO 
08N111W MAINTAIN WEAK SW FLOW ALOFT REMAINDER OF BASIN.  

ELSEWHERE AT THE SURFACE....
LARGE 1031 MB STATIONARY HIGH PRES CENTER WELL NW OF BASIN KEEP 
STEADY FRESH NE TRADES W OF 120W THROUGH FORECAST PERIOD.  LARGE 
LONG PERIOD SWELLS SPREAD SE CAUSED BY HIGH PRES LONG FETCH. 

WINDS IN GULF OF TEHUANTEPEC EXPECTED BELOW 20 KT WED.  LITTLE 
CHANGE IN GULF OF PAPAGAYO TO E FRESH BREEZE. 

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

$$
WALLY BARNES