000
AXPZ20 KNHC 290925
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC TUE APR 29 2008

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 
0900 UTC.

...ITCZ...
ITCZ AXIS IS ALONG THE LINE...03N78W TO 05N90W TO 05N125W TO 
03N140W. SCATTERED MODERATE TO STRONG CONVECTION IS WITHIN 60 NM 
OF THE POINT 04N91W. SCATTERED MODERATE WITH ISOLATED STRONG 
CONVECTION IS WITHIN 120 NM EITHER SIDE OF THE ITCZ AXIS FROM 
121W TO 135W.

...DISCUSSION...

UPPER LEVELS...
MAINLY UPPER TROUGH IS OVER THE FAR SOUTHWEST PART OF THE AREA. 
THE TROUGH AXIS IS ALONG A LINE 10N140W TO THE EQUATOR NEAR 
132W. THE SOUTHERLY FLOW TO THE EAST OF THE TROUGH AXIS IS 
DIFLUENT ALOFT AND IS ASSOCIATED WITH THE ENHANCED CONVECTION IN 
THE ITCZ IN THE AREA.

OTHERWISE THE AREA IS COVERED IN BROAD ANTICYCLONIC FLOW. A 
LARGE AREA OF DRY MIDDLE AND UPPER LEVELS IS NORTH OF A LINE 
FROM NEAR 22N97W TO 12N110W TO 15N130W 23N130W TO 25N140W.

THE UPPER FLOW IS ALSO DIFLUENT ALOFT OVER THE ITCZ FROM 88W TO 
105W WITH ENHANCED CONVECTION IN THIS AREA.

SURFACE...
MODERATE RIDGE IS NORTH OF THE ITCZ WEST OF 105W. ELSEWHERE 
BROAD TROUGH IS ANALYZED.

GAP WINDS OF GALE FORCE ARE IN THE GULF OF TEHUANTEPEC UNTIL 
MIDDAY TODAY THEN WILL FALL TO LESS THAN 20 KNOTS MIDDAY 
WEDNESDAY.

$$
LL