000
AXPZ20 KNHC 230903
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC WED MAY 23 2007

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...
INTERTROPICAL CONVERGENCE ZONE AXIS ALONG 12N87W 9N105W 10N115W 
6N140W. SCATTERED MODERATE TO STRONG CONVECTION WITHIN 100 NM OF 
COAST OF NICARAGUA AND WITHIN 120 NM EITHER SIDE OF AXIS FROM 
106W TO 113W AND WITHIN 160 NM N OF AXIS FROM 113W TO 116W.

...DISCUSSION...
MID/UPPER LEVEL TROUGH EXTENDS FROM 32N126W TO 25N140W. VERY DRY 
AIR MASS ALOFT N OF 20N W OF 110W DUE TO MODERATE TO STRONG 
SUBSIDENCE.  

UPPER LEVEL ANTICYCLONIC CIRCULATION CENTERED NEAR 13N116W MID 
TO UPPER LEVEL RIDGE ACROSS ENTIRE DISCUSSION AREA S OF 17N WITH 
RIDGE AXIS ROUGHLY ALONG 16N. FLOW AROUND THE ANTICYCLONIC 
CIRCULATION IS ADVECTING TROPICAL MOISTURE FROM ITCZ INTO 
SOUTHERN AND CENTRAL MEXICO. 

HIGH PRES CENTER RIDGE EXTENDS FROM 32N132W TO 17N110W. BROKEN 
TO OVERCAST STRATOCUMULUS CLOUDS COVERS THE AREA N OF 15N W OF 
112W. A 1007 MB SURFACE LOW IS ANALYZED OVER SOUTHERN MEXICO 
NEAR 17N93W.

$$
DGS