000
AXPZ20 KNHC 252109
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 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 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2100 UTC.

...ITCZ...
ITCZ AXIS IS CENTERED ALONG 8N78W 9N100W 8N119W 5N130W 3N140W. 
SCATTERED MODERATE TO STRONG CONVECTION FROM 4N TO THE S COAST 
PANAMA BETWEEN 78W AND 84W...INCLUDING THE GULF OF PANAMA. 
SCATTERED MODERATE FROM 4N TO 7N BETWEEN 92W AND 97W AND FROM 4N 
TO 6N BETWEEN 102W AND 108W. SCATTERED MODERATE 100 NM EITHER 
SIDE OF AXIS BETWEEN 115W AND 126W.

...DISCUSSION...
A MID- TO UPPER TROPOSPHERIC TROUGH EXTENDS OVER THE NW AREA 
FROM 32N125W TO 14N140W. A 90 TO 110 KT SUBTROPICAL JET EXTENDS 
DOWNSTREAM FROM THE TROUGH AXIS FROM 18N132W TO THE CNTRL BAJA 
PENINSULA...CONTINUING E OVER NW MEXICO. STRONG SUBSIDENCE 
EXISTS WITHIN THE BASE AND JUST DOWNSTREAM OF THE TROUGH FROM 
14N-20N W OF 130W. JET SPEED DIVERGENCE IS INCREASING MID- TO 
UPPER LEVEL MOISTURE/CLOUDS S OF THE SUBTROPICAL JET AXIS AND IS 
SPREADING OVER THE S BAJA PENINSULA COAST AND ADJACENT WATERS. 
WEAK COLD FRONT EXTENDS FROM 30N127W TO 28N132W. STABLE SHALLOW 
LAYERED LOW DECK CLOUDINESS ACCOMPANIES THE FRONTAL SYSTEM. 

UPPER LEVEL TROUGH EXTENDS FROM YUCATAN SWD ACROSS GUATEMALA 
INTO THE PACIFIC NEAR 8N93W. DIFFLUENT UPPER SWLY FLOW IS 
TRIGGERING STRONG TSTM ACTIVITY ALONG THE ITCZ E OF 84W. 
SUBSIDENCE UPSTREAM FROM THE TROUGH AXIS IS CLEARING SKIES OVER 
SRN MEXICO AND ADJACENT WATERS.

$$
ROBERTS