000
AXPZ20 KNHC 041506
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
165 UTC WED APR 4 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...
AXIS 9N80W 5N105W 6N122W 5N140W. SCATTERED MODERATE TO STRONG 
FROM 5N TO 9N BETWEEN 81W AND 84W. SCATTERED MODERATE FROM 5N TO 
8N BETWEEN 132W AND 135W ALSO WITHIN 90 NM S OF AXIS BETWEEN 86W 
AND 91W.

...DISCUSSION...
MID/UPPER LEVEL TROUGH EXTENDS FROM 32N137W TO 20N140W. 
SATELLITE DERIVED WINDS INDICATE AN 85-95 KT JET STREAM SE OF 
THE TROUGH AXIS FROM 19N140W TO 25N134W TO 32N132W. MODERATE TO 
STRONG SUBSIDENCE IS WITHIN 240 NM W OF THE JET...WITH A PLUME 
OF TROPICAL MOISTURE BEING ADVECTED NEWD N OF 25N E OF THE JET 
AXIS TO 120W. AN  UPPER LEVEL RIDGE EXTENDS FROM 32N120W TO 
13N125W. DEEP LAYER TROUGH E OF THE RIDGE WITH AXIS FROM THE BIG 
BEND OF TEXAS ACROSS NW MEXICO TO 6N108W. AN E-W RIDGE EXTENDS 
FROM AN ANTICYCLONIC CIRCULATION OVER NW COLOMBIA ACROSS THE SW 
CARIBBEAN TO NICARAGUA AND HONDURAS TO THE YUCATAN CHANNEL. 
UPPER LEVEL DIFFLUENCE SW OF THE RIDGE IS ENHANCING TSTMS ALONG 
THE ITCZ E OF 90W. 

DISSIPATING COLD FRONT IS ANALYZED IN THE EXTREME NW PORTION OF 
DISCUSSION AREA FROM 32N135W TO 23N140W. AN AREA OF BROKEN TO 
OVERCAST LOW CLOUDS IS WITHIN 120 NM E OF THE FRONT. STATIONARY 
1021 MB HIGH JUST N OF THE AREA NEAR 33N127W WILL PREVENT 
FURTHER WESTWARD MOVEMENT OF THE FRONT. 

$$
DGS