000
AXPZ20 KNHC 110322
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC TUE MAR 11 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 THE LINE...2N78W 4N100W 5N140W.
SCATTERED MODERATE WITH ISOLATED STRONG CONVECTION IS WITHIN 120 
NM OF THE POINT 5.5N121.5W.

...DISCUSSION...
UPPER LEVELS...
TWO TROUGHS ARE OVER THE AREA. ONE DEEP LAYER TROUGH IS OVER 
MEXICO AND A MAINLY UPPER LEVEL PART OF THE TROUGH EXTENDS SOUTH 
TOWARD THE ITCZ. THE TROUGH IS EAST OF A LINE 32N120W TO 
25N120W. THE UPPER PORTION OF THE TROUGH EXTENDS SOUTHWEST FROM 
CENTRAL MEXICO WITH AN AXIS ALONG 22N98W TO THE ITCZ NEAR 120W. 
AN AREA OF UPPER LEVEL MOISTURE AND SOME MAINLY BROKEN UPPER 
LEVEL CLOUDINESS EXTENDS WITHIN 400 NM SE OF THE TROUGH AXIS AND 
IS FLOWING NORTHEASTWARD OVER MEXICO. DRY AND CLOUD FREE AIR IS 
OBSERVED WITHIN 200 TO 300 NM NW OF THE TROUGH AXIS. THIS TROUGH 
HIS EXPECTED TO MAINTAIN THROUGH 48 HOURS.

A MAINLY UPPER TROUGH IS OVER THE WEST CENTRAL PART OF THE AREA 
WITH A TROUGH AXIS ALONG A LINE FROM 25N135W TO THE ITCZ NEAR 
132W. SOME BROKEN CLOUDS EXTEND 400 NM EAST FROM THE AXIS IN 
THE SOUTHWEST FLOW FROM 11N TO 20N. THE CLOUD PATTERN SUGGEST 
UPPER LEVEL TURBULENCE MAY BE IN THIS AREA. DRY AND CLOUD FREE 
AIR IS OBSERVED WEST OF 135W FROM 5N TO 25N. THIS TROUGH IS ALSO 
EXPECTED TO REMAIN THROUGH 48 HOURS.

REMAINDER OF THE AREA IS WEAK ANTICYCLONIC FLOW. 

SURFACE...
WEAK RIDGE IS NORTH OF 12N WEST OF 122W. A VERY WEAK RIDGE IS 
ALONG THE AMERICA COAST NORTH OF COSTA RICA. ELSEWHERE BROAD TO 
WEAK TROUGH IS ANALYZED IN THE PRESSURE FIELD.  
 
E FLOW THROUGH THE GULF OF PAPAGAYO WILL CONTINUE THROUGH 48 
HOURS.

A BRIEF...12 HOUR...GAP WIND EVENT WILL TAKE PLACE IN THE GULF 
OF TEHUANTEPEC BEGINNING TUESDAY NIGHT.

$$
LL