000
AXPZ20 KNHC 150912
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC SUN JUN 15 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...
INTERTROPICAL CONVERGENCE ZONE IS CENTERED ALONG 9N84W 9N100W 
5N115W 8N130W 7N140W. SCATTERED MODERATE TO STRONG CONVECTION 
FROM 4N-9N BETWEEN 87W-98W.

...DISCUSSION...
UPPER LEVEL TROUGH EXTENDS FROM 30N140W 20N128W TO 10N119W.  
AN UPPER RIDGE IS SW OF THE TROUGH COVERS THE AREA S OF 12N W OF 
120W. SOME HIGH LEVEL MOISTURE IS STREAMING EWD ON A 50-70 KT 
WIND MAX BETWEEN THE TROUGH AND RIDGE FROM 14N-20N W OF 128W. 
OTHERWISE MOSTLY DRY AIR AT THE MID AND UPPER LEVELS OF THE 
ATMOSPHERE N OF THE ITCZ W OF 110W. BROAD MID/UPPER LEVEL RIDGE
EXTENDS FROM AN UPPER LEVEL ANTICYCLONIC CIRCULATION NEAR THE 
TEXAS MEXICO BORDER AT 30N105W TO ANOTHER ANTICYCLONIC 
CIRCULATION OVER SOUTHERN BAJA CALIFORNIA TO 11N114W. UPPER 
LEVEL TROUGH EXTENDS FROM CYCLONIC CIRCULATION OVER THE BAY OF 
CAMPECHE NEAR 20N95W ACROSS SOUTHERN MEXICO TO 14N103W. UPPER 
LEVEL DIFLUENT FLOW IS ENHANCING CONVECTIVE ACTIVITY OVER THE 
YUCATAN PENINSULA. UPPER RIDGE REMAINS OVER COSTA RICA WITH THE 
RIDGE AXIS EXTENDING W TO 20N97W PROVIDING DIFFLUENCE ALOFT TO 
ENHANCE THE CONVECTION ALONG THE ITCZ.

SURFACE HIGH PRES RIDGE COVERS THE AREA N OF 10N E OF 105W.
BROKEN TO OVERCAST STRATOCUMULUS CLOUDS ARE N OF 15N W OF 115W.
 
$$
DGS