000
AXPZ20 KNHC 100310
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 9N85W 6N100W 8N110W 3N125W 
5N135W TO 4N140W. SCATTERED MODERATE TO STRONG CONVECTION WITHIN 
220 NM S OF AXIS FROM 85W-89W AND WITHIN 120 NM S OF AXIS FROM 
103W-116W.

...DISCUSSION...
MID/UPPER LEVEL TROUGH WITH AXIS FROM 32N126W TO CYCLONIC 
CIRCULATION NEAR 26N133W CONTINUING TO 23N140W. MODERATE TO
STRONG SUBSIDENCE WITH DRY AIR AT THE MID AND UPPER LEVELS OF
THE ATMOSPHERE COVERS THE AREA FROM 24N-30N W OF 125W. SW UPPER
LEVEL WINDS E OF THE TROUGH ARE ADVECTING TROPICAL MOISTURE INTO
THE SOUTHERN BAJA PENINSULA AND NW MEXICO. LARGE MID/UPPER LEVEL
ANTICYCLONIC CIRCULATION CENTERED OVER MEXICO NEAR 20N97W. 
MODERATE/STRONG SUBSIDENCE IS S OF THE ANTICYCLONE TO THE ITCZ 
BETWEEN 90W-105W. A 1005 MB LOW PRES NEAR 9N86W COMBINED WITH 
UPPER LEVEL DIFFLUENT FLOW IS ENHANCING CONVECTIVE ACTIVITY OVER 
COSTA RICA.

A 1008 MB SURFACE LOW IS ANALYZED ALONG THE ITCZ NEAR 6N113W 
WITH TROUGH FROM THE LOW PRES CENTER NWD TO 12N112W. ANOTHER
TROUGH ALONG THE ITCZ FROM 9N133W TO 5N135W. OTHERWISE HIGH
PRES DOMINATES THE AREA N OF 15N W OF 110W. BROKEN/OVERCAST
STRATOCUMULUS CLOUDS COVERS THE AREA N OF 15N W OF 120W.

$$
DGS