000
AXPZ20 KNHC 241524
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC TUE APR 24 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 ALONG...6N77W 9N100W 9N120W 7N125W 2N140W.
SCATTERED MODERATE CONVECTION IS WITHIN 60 NM OF THE POINT 
6.3N79W. SCATTERED MODERATE TO STRONG CONVECTION IS WITHIN 75 NM 
EITHER SIDE OF ITCZ AXIS FROM 108W TO 122W AND FROM 128W TO 133W.

...DISCUSSION...
UPPER LEVELS...
TROUGH IS ACROSS THE AREA SOUTH OF ABOUT 25N TO A LINE 20N105W 
TO 18N130W TO 12N140W. THE TROUGH AXIS IS ALONG LINE 26N106W TO 
21N112W 21N130W 14N140W. NORTH OF THE TROUGH AXIS TO 25N DRY AND 
CLOUD FREE AIR IS OBSERVED IN THE MIDDLE AND UPPER LEVELS.  
SOUTH OF THE TROUGH AXIS MIDDLE AND UPPER LEVEL MOISTURE 
EMANATING FROM ITCZ CONVECTION IS BEING LIFTED NORTHWARD THEN 
EASTWARD.  A PLUME OF UPPER LEVEL MOISTURE WITH BROKEN MIDDLE 
AND UPPER LEVEL CLOUDS IS ADVECTING NORTHEAST OVER CENTRAL 
MEXICO.

THE REMAINDER OF THE AREA IS COVERED BY MIDDLE AND UPPER LEVEL 
RIDGE. DRY AIR IS OBSERVED IN THE MIDDLE AND UPPER LEVELS 
SOUTHEAST OF A LINE 20N105W TO THE ITCZ NEAR 111W. 

SURFACE...
MODERATE RIDGE IS NORTH OF 12N WEST OF 105W AND A WEAK RIDGE IS 
NORTH OF 10N EAST OF 100W. ELSEWHERE BROAD TROUGH IS OBSERVED. 
NORTH OF THE UPPER TROUGH AXIS THE LOWER LEVELS IS COVERED BY 
BROKEN TO OVERCAST STRATOCUMULUS NORTH OF 15N.

$$
LL