000
AXPZ20 KNHC 200952
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 
1005 UTC FRI APR 20 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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY 
THROUGH 0915 UTC.

...ITCZ...

AXIS IS ALONG 9N76W 8N95W 8N110W 5N125W 4N140W. SCATTERED 
MODERATE ISOLATED STRONG CONVECTION IS LOCATED WITHIN 90 NM 
EITHER SIDE OF A 4.5N88.5W 3.5N93W 5.5N96.5W LINE.

...DISCUSSION...

W OF 105W...
WELL-DEFINED MIDDLE/UPPER LEVEL TROUGH IS LOCATED N OF ABOUT 27N 
E OF 128W INTO NW MEXICO WITH THE AXIS ALONG 124W. THICK HIGH 
CLOUDS ARE ROTATING THROUGH THE TROUGH. AN ASSOCIATED COLD FRONT 
EXTENDS THROUGH 32N125W TO 30N132W TO BEYOND 32N137W. FURTHER 
SOUTH A JET IS LOCATED THROUGH 15N140W TO 19N120W TO BEYOND 
23N107W. SATELLITE CLOUD DRIFT WINDS ALONG THE JET AXIS ARE IN 
THE 70 TO 80 KNOT RANGE. BROAD RIDGING ALOFT COVERS THE DEEP 
TROPICS S OF ABOUT 15N W OF 110W. 

E OF 105W...
THE SOUTHERN PART OF A LARGE RIDGE ALOFT OVER THE GULF OF MEXICO 
AND SOUTHERN MEXICO COVERS THE DISCUSSION AREA BETWEEN 90W AND 
105W. DIFLUENT FLOW ALOFT IN THIS AREA IS AIDING THE ITCZ 
CONVECTION NOTED ABOVE. 

$$
CAB