000
AXPZ20 KNHC 192225
TWDEP 

TAXIS 6N77W 6N94W 9N105W 3N140W. 
SCATTERED MODERATE ISOLATED STRONG WITHIN 150 NM OF AXIS BETWEEN 
80W AND 100W AND WITHIN 15 NM OF 106W.TROPICAL WEATHER 
DISCUSSION    NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC THU APR 19 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 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2145 UTC.

...ITCZ...

AXIS IS ALONG 6N77W 6N94W 9N105W 3N140W. SCATTERED MODERATE 
ISOLATED STRONG CONVECTION IS INTENSIFYING WITHIN 150 NM OF ITCZ 
AXIS BETWEEN 80W AND 100W AND ALSO WEAKENING WITHIN 15 NM OF 
106W.

...DISCUSSION...

A BROAD UPPER LEVEL TROUGH DOMINATES DISCUSSION AREA N OF 20N W 
OF 115W WITH ITS MEAN AXIS ORIENTATED NW TO SE ALONG 32N122W 
20N113W. A THIN BAND OF UPPER LEVEL MOISTURE IS INDICATED WITHIN 
30 NM EITHER SIDE OF LINE 32N116W 27N124W 26N140W. OTHERWISE THE 
UPPER LEVELS APPEAR DRY WITHIN THE TROUGH.  

AN UPPER RIDGE EXTENDS NE ACROSS THE EQUATOR CRESTING ALONG 
POINTS 20N140W 21N130W 2N112W. AN UPPER ANTICYCLONE IS CENTERED 
NEAR 5N75W WITH A DEEP LAYERED RIDGE EXTENDING W ALONG 11N94W 
THEN TURNING N AND CRESTING ALONG 24N112W 37N98W 30N79W. AT THE 
MID LEVELS THE RIDGE CONTINUES W ACROSS THE TROPICS TO A CREST 
AT 10N138W. THE UPPER LEVELS ARE STILL MOIST S OF 18NW OF 117W 
WITH A MOISTURE PLUME ADVECTED N ALONG THE W PERIPHERY OF THE 
UPPER RIDGE...ROUGHLY WITHIN 420 NM EITHER SIDE OF LINE 14N110W 
24N103W 32N92W. ASSOCIATED UPPER DIFFLUENCE IS ENHANCING ITCZ 
CONVECTION BETWEEN 100W AND 80W WITH THE RESULTANT DEBRIS 
MOISTURE NOW SPREADING N ACROSS CENTRAL AMERICA. 

AT THE LOW LEVELS BROAD HIGH PRES DOMINATES THE DISCUSSION AREA 
N OF THE ITCZ W OF 105W.

$$
NELSON