000
AXPZ20 KNHC 281604
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC SAT APR 28 2007

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS 
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND 
METEOROLOGICAL ANALYSIS.

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

...ITCZ...

ITCZ AXIS IS CENTERED ALONG...4N77W 6N95W 8N140W. CONVECTION... 
SCATTERED MODERATE ISOLATED STRONG 120 NM WIDE 77W TO 93W. 
SCATTERED MODERATE ISOLATED STRONG 120 NM WIDE 120W TO 125W.

...DISCUSSION...
UPPER LEVELS...
A CYCLONIC CIRCULATION OVER THE GULF OF CALIFORNIA IS MOVING 
RAPIDLY NE. A TROUGH EXTENDS FROM THE LOW CENTER NEAR 29N11W TO 
14N113W. A LARGE MASS OF UPPER AIR MOISTURE IS N OF 16N E OF 
121W AND IS MOVING NG RAPIDLY EASTWARD WITH THE LOW AND TROUGH.
A SHORTWAVE TROUGH EXTENDS FROM 32N135W TO 23N136W MOVING 
RAPIDLY NE. AN AREA OF MOISTURE IN N OF 22N W OF 130W MOVING NE 
WITH THE TROUGH.. 

SURFACE...
MODERATE RIDGE IS NORTH OF THE ITCZ WEST OF 100W. FROM 7N TO 17N 
W OF 125W NE WINDS 20 KT SEAS TO 9 FT. ELSEWHERE W OF 110W WINDS 
LESS THAN 20 KT SEAS 8 TO 11 FT IN NW SWELL.

GAP WINDS...FROM 10N TO 12N E OF 90W INCLUDING THE GULF OF 
PAPAGAYO...NE WINDS 20 KT SEAS LESS THAN 8 FT.