000
AXPZ20 KNHC 092110
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC FRI MAY 09 2008

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. 

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2100 UTC.

...ITCZ...
INTERTROPICAL CONVERGENCE ZONE ALONG 8N82W TO 6N95W TO 7N110W 
TO 2N125W TO 5N135W TO 4N140W. SCATTERED MODERATE TO STRONG 
CONVECTION WITHIN 150 NM EITHER SIDE OF AXIS FROM 81W-87W. 
SCATTERED MODERATE CONVECTION WITHIN 150 NM S OF AXIS FROM 95W 
TO 115W. SCATTERED MODERATE TO STRONG CONVECTION WITHIN 100 NM 
S OF AXIS FROM 113W-117W.

...DISCUSSION...
MID/UPPER LEVEL TROUGH WITH AXIS FROM 32N127W TO CYCLONIC 
CIRCULATION NEAR 25N133W CONTINUING TO 22N140W. 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 19N97W.
MODERATE/STRONG CONVECTION S OF THE ANTICYCLONE TO THE ITCZ
BETWEEN 90W-105W. UPPER LEVEL DIFFLUENT FLOW IS ENHANCING 
CONVECTIVE ACTIVITY OVER COSTA RICA.

A 1010 MB SURFACE LOW IS ANALYZED ALONG THE ITCZ NEAR 6N113W
WITH TROUGH FROM THE LOW PRES CENTER NWD TO 12N113W. SCATTERED
MODERATE TO STRONG CONVECTION IS OVER THE SW QUADRANT OF THE
LOW ALONG THE ITCZ DESCRIBED ABOVE.

$$
DGS