000
AXPZ20 KNHC 310302
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC MON MAR 31 2008

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 0300 UTC.

...ITCZ...
ITCZ AXIS IS ALONG 09N78W TO 02N102W TO 07N121W TO 03N135W TO 
05N140W. SCATTERED MODERATE ISOLATED STRONG CONVECTION IS NOTED 
FROM 03N TO 08N BETWEEN 85W AND 96W...AND WITH 15 NM EITHER SIDE 
OF LINE 02N103W TO 06N115W...AND FROM 03N TO 11N BETWEEN 115W 
AND 125W.

...DISCUSSION...
ALOFT...A MID TO UPPER TROUGH EXTENDS ALONG THE W COAST OF THE 
CONUS SW INTO THE DISCUSSION AREA ALONG 32N118W TO 23N128W TO 
13N137W. SOME UPPER MOISTURE HAS SPREAD SE INTO THE DISCUSSION 
AREA N OF 27N W OF 133W. OTHERWISE DRY UPPER AIR IS NOTED WITHIN 
120 NM EITHER SIDE OF LINE 31N106W TO 27N124W THEN THE DRY BAND 
WIDENS TO COVER THE UPPER LEVELS FROM 15N TO 27N BETWEEN 124W 
AND 144W. AN UPPER ANTICYCLONE IS CENTERED NEAR 12N95W WITH A 
RIDGE W TO A SHARP CREST NEAR 09N129W. UPPER DIFFLUENCE ALONG 
AND JUST S OF THE UPPER RIDGE ENHANCED CONVECTION ALONG THE ITCZ 
BETWEEN 115W AND 128W. UPPER DEBRIS MOISTURE IS ADVECTED NE 
ALONG THE W PERIPHERY OF THE UPPER RIDGE...CONCENTRATED IN A 
PLUME WITHIN 300 NM EITHER SIDE OF POINTS 10N123W TO 20N122W TO 
NEAR 26N110W WHERE THE MOISTURE NEARLY EVAPORATES. ITCZ 
CONVECTION IS ALSO ENHANCED E OF 96W WITH THE DEBRIS MOISTURE 
STREAMING NE ACROSS CENTRAL AMERICA E OF 92W. OTHERWISE DRY 
UPPER AIR IS NOTED N OF 10N BETWEEN 110W AND 85W.

AT THE SURFACE...A SUBTROPICAL RIDGE EXTENDS INTO THE REGION 
ALONG 26N140W TO 11N104W. NE TO E TRADES ARE NOTED SW OF THE 
RIDGE BUT HAVE WEAKENED TO ABOUT 20 KT. ADDITIONALLY 20 KT NW 
TO N WINDS STILL EXIST WITHIN 420 NM W OF THE BAJA CALIFORNIA 
COAST. BOTH OF THESE AREAS ARE EXPECTED TO CONTINUE TO DIMINISH 
AS A COLD FRONT MOVES INTO THE NW PORTION OF THE REGION MON
AND WEAKENS THE RIDGE. WINDS AROUND 20 KT ARE EXPECTED TO 
OCCUR IN THE VICINITY OF THE FRONT WITH NW SWELLS INCREASING TO 
10 FT OVER THE NW CORNER BY TUE.  

GAP WINDS...WILL CONTINUE THE FORECAST OF 20 KT NE TO E WINDS IN 
THE GULF OF PAPAGAYO THROUGH TONIGHT THEN DROP MENTION. N 15 KT 
WINDS NOTED DOWNSTREAM OF THE GULF OF PANAMA. 

$$
NELSON