000
AXPZ20 KNHC 250905
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC FRI APR 25 2008

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. 

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC.

...ITCZ...
ITCZ AXIS ALONG 06N78W TO 08N85W TO 06N95W TO TO 07N105W TO 
03N140W. SCATTERED MODERATE/ISOLATED STRONG WITHIN 180 NM S OF 
AXIS FROM 105W TO 121W AND WITHIN 90 NM S OF AXIS FROM 132W TO 
140W.

...DISCUSSION...
BROAD MID/UPPER LEVEL RIDGE OVER THE W PORTION OF THE DISCUSSION 
AREA W OF 125W...WITH ANTICYCLONIC CIRCULATION CENTERED NEAR 
167N133W. HOWEVER UPPER LEVEL ZONAL FLOW PERSISTS OVER THE 
NORTHERN PORTION OF THE AREA WITH A 80-90 KT SUBTROPICAL JET 
ENTERING NEAR 25N140W THEN EASTWARD OVER NORTHERN MEXICO. 
MODERATE TO STRONG SUBSIDENCE IS WITHIN 300 NM N OF THE 
JET...WITH HIGH LEVEL MOISTURE WITHIN 600 NM S OF THE JET W OF 
130W. A BROAD MID/UPPER LEVEL TROUGH EXTENDS FROM NORTHERN 
MEXICO SW TO SOUTHERN BAJA CALIFORNIA. STRONG MID/UPPER 
ANTICYCLONE IS LOCATED OVER CENTRAL MEXICO.

AN UPPER LEVEL RIDGE EXTENDS FROM COLOMBIA WESTWARD OVER PANAMA 
AND COSTA RICA TO 12N106W. MOSTLY DRY AIR IS NOTED N OF THE 
RIDGE AXIS WITH ABUNDANT TROPICAL MOISTURE S OF THE RIDGE 
AXIS.

A 1029 MB HIGH PRES N OF THE AREA WITH ASSOCIATED RIDGE SE FROM 
THE HIGH TO 32N130W TO 15N107W. BROKEN STRATOCUMULUS CLOUDS ARE
N OF 15N W OF 125W.

$$
DGS