000
AXPZ20 KNHC 130425
TWDEP 

TROPICAL WEATHER DISCUSSION  
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC MON MAR 13 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 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0345 UTC.

...ITCZ...
ITCZ AXIS ALONG 7N78W 3N105W 7N116W 1N140W.
NO SIGNIFICANT CONVECTION.

...DISCUSSION...
BROAD MID/UPPER LEVEL TROUGH HAS MOVED N OF AREA LEAVING 
QUASI-ZONAL FLOW ACROSS E PAC W OF 110W. JET STREAM WITH 90 KT 
RUNS NE N OF 28N E OF 125W WHILE PLENTY OF MOISTURE CROSS BASIN 
N OF 10N INTO N HALF OF MEXICO AND NW GULF OF MEXICO.  VERY DRY 
AIRMASS DUE TO MODERATE TO STRONG SUBSIDENCE S OF 10N THROUGH 
110W THEN S OF 20N E OF 110W WITH QUICKLY DIMINISHING 
CONVECTION ALONG ITCZ E OF 100W AND W OF 123W.  

DOWNSTREAM...MID/UPPER LEVEL RIDGE ALONG 85W EXTENDS AREA OF 
STRONG SUBSIDENCE...HENCE DRY AIR MASS...INTO S HALF OF GULF OF 
MEXICO...CENTRAL AMERICA AND THROUGH ENTIRE CARIBBEAN BASIN.

AT THE SURFACE...RIDGE WITH AXIS FROM 32N140W TO 19N110W 
MAINTAINS BRISK TRADES FROM 08N TO 22N W OF 120W.  
ELSEWHERE...LARGE SWELLS SPREADING SE AFFECTING FORECAST WATERS 
N OF 20N.

$$
WALLY BARNES