000
AXPZ20 KNHC 281521
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC THU JUN 28 2007

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

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY
THROUGH 1500 UTC.

...THE TROPICAL WAVES...
TROPICAL WAVE N OF 4N ALONG 83W MOVING W 10 KT. NO PRECIPITATION 
WITH THIS WAVE IN THE EASTERN PACIFIC OCEAN.

TROPICAL WAVE N OF 4N TO MEXICO ALONG 98W MOVING W 15 KT. NO 
SIGNIFICANT CONVECTION ASSOCIATED WITH THIS WAVE.

TROPICAL WAVE FROM 4N-18N ALONG 132W MOVING W 10 TO 15 KT. 
NUMEROUS MODERATE/STRONG SHOWERS AND TSTMS FROM 10N-13N BETWEEN 
126W-131W.

...THE ITCZ...
9N84W 8N100W 14N115W 6N140W. SCATTERED MODERATE ISOLATED STRONG 
CONVECTION WITHIN 90 NM EITHER SIDE OF AXIS FROM 100W TO 106W 
AND WITHIN 90 NM S OF AXIS FROM 119W TO 118W.

...THE DISCUSSION...
UPPER LEVEL CYCLONIC CIRCULATION OVER THE W PORTION OF THE AREA 
IS CENTERED NEAR 12N135W MOVING NW 10-15 KT. OTHERWISE BROAD
UPPER LEVEL ANTICYCLONIC FLOW COVERS THE AREA W OF 115W....WITH
RIDGE AXIS EXTENDING ROUGHLY ALONG 122W. DRY AIR SUBSIDENT AIR 
COVERS THE AREA FROM N OF 20N W OF 110W. UPPER LEVEL CYCLONIC
CIRCULATION OVER THE BAY OF CAMPECHE WITH TROUGH ACROSS SOUTHERN
MEXICO TO 8N94W. DIFFLUENT FLOW BETWEEN THE BAY OF CAMPECHE 
CYCLONE AND AN ANTICYCLONIC CIRCULATION IN THE CARIBBEAN IS
ENHANCING CONVECTIVE ACTIVITY ACROSS CENTRAL AMERICA.

A 1009 MB SURFACE LOW IS CENTERED NEAR 15N115W. MODERATE TO 
STRONG
IS WITHIN 130 NM W SEMICIRCLE OF THE LOW CENTER. BROAD 
ANTICYCLONIC SURFACE WIND FLOW IS N OF 20N W OF 110W. 

$$
DGS