000
AXPZ20 KNHC 011614
TWDEP 

TROPICAL WEATHER DISCUSSION  
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC SAT APR 01 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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY 
THROUGH 1445 UTC.

...ITCZ...
ITCZ AXIS ALONG  5N77W 4N100W 3N140W. SCATTERED MODERATE WITHIN 
60 NM N OF AXIS E OF 110W AND 90 NM OF AXIS FROM 120W TO 127W.

...DISCUSSION...
BROAD UPPER LEVEL RIDGE MOVES INTO FAR W PORTION OF AREA...W OF 
135W.  MID AND HIGH LEVEL MOISTURE ENTERS WITH 70 KT JET CORE 
OVER RIDGE CREST FROM 15N-27N W OF 130W.  LARGE AMPLITUDE 
LONGWAVE TROUGH DOWNSTREAM WITH AXIS FROM 32N120W TO UPPER 
CYCLONIC VORTEX AT 7N125W CONTINUING S CROSSING EQUATOR AT 125W.
SWATH OF DRY AIR DUE TO UPPER SUBSIDENCE WITHIN 90 NM OF LINE 
29N140W 24N125W 32N110W.  TROPICAL MOISTURE ADVECTED WWD S OF 
DRY SWATH INTO NWS BAJA CALIFORNIA AND NW MEXICO THEN CONTINUES 
INTO W TEXAS.

LARGE WELL ANCHORED UPPER LEVEL ANTICYCLONE CENTERED OVER 
VENEZUELA HAS RIDGE EXTEND NW ACROSS CENTRAL AMERICA THROUGH 
YUCATAN PENINSULA AND INTO GULF OF MEXICO.  MODERATE UPPER 
DIFFLUENCE IN W PART OF RIDGE ENHANCES CONVECTION ALONG ITCZ W 
OF PANAMA AND COSTA RICA THROUGH 95W.  OTHERWISE DRY UPPER AIR 
DOMINATES DISCUSSION AREA S OF 20N E OF 120W. 

AT THE SURFACE...WEAK TROUGH EXTENDS FROM 32N120W TO 1018 MB LOW 
PRES NEAR 27N132W THEN TO 22N140W.  HIGH PRES...1021 MB CENTERED 
AT 28N119W BLOCKS E PROGRESS OF TROUGH AND FORCES IT NE.  GULF 
OF PAPAGAYO STILL HAS BRISK NE WINDS SPILLING OVER FROM WRN 
CARIBBEAN AND LIKELY TO CONTINUE NEXT 48 HRS. 

$$
WALLY BARNES