000
AXPZ20 KNHC 090318
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC FRI MAY 09 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...
INTERTROPICAL CONVERGENCE ZONE ALONG THE LINE...06N77W TO 
03N100W 05N105W TO 05N130W TO 03N140W. NUMEROUS MODERATE AND 
SCATTERED STRONG CONVECTION IS WITHIN 150 NM OF THE POINT 
06N82W. SCATTERED MODERATE WITH ISOLATED STRONG CONVECTION IS 
WITHIN 60 NM OF THE POINTS 05N105W AND 06N109W. SCATTERED 
MODERATE TO STRONG CONVECTION IS WITHIN 120 NM OF THE POINT 
10N110W.

...DISCUSSION...
UPPER LEVELS...
RIDGE CENTERED WEST OF THE AREA ALONG 30N EXTENDS OVER THE 
NORTHWEST PART OF THE AREA NORTH OF 28N WEST OF 133W. ELSEWHERE 
NORTH OF THE ITCZ AND WEST OF A LINE 32N120W TO 05N130W A TROUGH 
COVERS THE AREA. A LARGE CYCLONIC CIRCULATION IS EMBEDDED WITHIN 
THE TROUGH AND IS CENTERED NEAR 27N124W. THE CYCLONIC 
CIRCULATION IS FORECAST TO WEAKEN AND MOVE NORTHEAST AND BE 
ABSORBED IN THE WESTERLY FLOW BUT THE OVERALL TROUGH WILL REMAIN 
THROUGH 48 HOURS. NORTH OF 15N THE TROUGH IS DRY AND CLOUD FREE 
IN THE MIDDLE AND UPPER LEVELS. BROKEN TO OVERCAST STRATOCUMULUS 
ARE IN THE LOWER LEVELS.

REMAINDER OF THE AREA IS UNDER BROAD ANTICYCLONIC FLOW.

THE AREA NORTH OF THE ITCZ FROM 105W TO 120W IS MOIST IN THE 
MIDDLE AND UPPER LEVELS WITH AREAS OF MULTI LEVEL BROKEN CLOUDS. 
ENHANCED CONVECTION IS WITHIN THE AREA NORTH OF THE ITCZ TO 10N 
FROM 105W TO 112W.

CONVECTION ALONG AND NORTH OF THE ITCZ FROM 80W TO 85W IS 
ENHANCED WITH VERY COLD TOP CONVECTION IN THIS REGION.

SURFACE...
MODERATE RIDGE IS NORTH OF 10N WEST OF 105W. A TROUGH IS 
ANALYZED ALONG 111W NORTH OF THE ITCZ TO 13N. ELSEWHERE BROAD 
TROUGH IS ANALYZED.

GAP WINDS OF 20 KNOTS IN THE GULF OF PAPAGAYO REGION WILL 
CONTINUE THROUGH FRIDAY.

$$
LL