000
AXPZ20 KNHC 250935
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC TUE APR 25 2006

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 
0845 UTC.

...ITCZ...

ITCZ AXIS IS CENTERED ALONG 7N77W 8N83W 7N95W 5N100W 8N122W 
2N140W. NUMEROUS MODERATE/STRONG CONVECTION FROM 4N-8N BETWEEN 
87W-94W. SCATTERED MODERATE/STRONG FROM 5N-10N BETWEEN 
118W-123W. SCATTERED MODERATE WITHIN 60 NM OF THE AXIS BETWEEN 
131W-139W.

...DISCUSSION...

W OF 110W...
A SHARP MID/UPPER LEVEL TROUGH IS POSITIVELY TILTED OVER THE 
AREA FROM 30N129W TO 20N140W WITH A 100 KT SUBTROPICAL JET 
RUNNING FROM 13N140W TO THE CNTRL BAJA PENINSULA AND NW MEXICO. 
UPPER CONFLUENCE INTO THE BASE OF THE TROUGH IS PRODUCING STRONG 
SUBSIDENCE FROM 14N-23N W OF 130W. A WEAK COLD FRONT... 
ORIGINATING FROM AN AREA OF LOW PRES OFF THE CALIFORNIA COAST... 
HAS MOVED INTO THE AREA FROM 30N132W TO 26N140W BUT IS WEAKENING 
QUICKLY WITH ONLY AN INCREASE IN WINDS TO ITS W. AN OVERCAST 
STRATUS DECK LIES AHEAD OF THE FRONT N OF 22N BETWEEN 116W AND 
132W ON THE E SIDE OF DISSIPATING HIGH PRES. FARTHER E...AN 
UPPER RIDGE LIES ALONG 115W WITH AN AREA OF DIFFLUENCE JUST TO 
ITS W OVER THE ITCZ...WHICH IS PRODUCING A CLUSTER OF SCATTERED 
TSTMS BETWEEN 118W-124W.

E OF 110W...
A NEARLY STATIONARY OPEN UPPER TROUGH LIES FROM THE BAY OF 
CAMPECHE SWD TO THE GULF OF TEHUANTEPEC WITH BROAD CYCLONIC FLOW 
EXTENDING FROM PUERTO VALLARTA MEXICO TO NICARAGUA AND COSTA 
RICA. THIS FEATURE IS PRODUCING TWO MAIN AREAS OF UPPER 
DIFFLUENCE WITH A STRONG CLUSTER OF TSTMS OVER GUATEMALA AND EL 
SALVADOR (AND THE COASTAL WATERS) AS WELL AS NEAR THE ITCZ 
BETWEEN 88W-95W. AN AREA OF MODERATE SUBSIDENCE ON THE BACK SIDE 
OF THE TROUGH IS KEEPING SKIES GENERALLY CLEAR BETWEEN 92W-110W 
N OF THE ITCZ. CONVERSELY...DEEP TROPICAL MOISTURE IS SPREADING 
DOWNSTREAM FROM THE TROUGH AND IS SUPPORTING THE DEVELOPMENT OF 
WIDELY SCATTERED TSTMS NEAR COSTA RICA AND PANAMA S/SEWD TOWARDS 
COLOMBIA.

$$
BERG