000
AXPZ20 KNHC 282150
TWDEP 

TROPICAL WEATHER DISCUSSION  
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC TUE MAR 28 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 2145 UTC.

...ITCZ...
ITCZ AXIS ALONG  2N78W  5N85W  2N140W. NO SIGNIFICANT CONVECTION.

...DISCUSSION...
ELONGATED DEEP LAYER CYCLONIC VORTEX WELL N OF AREA AT 44N127W 
HAS TROUGH EXTEND S-SE TO 20N122W. JET CORE OF 110 KT REMAINS AT 
THE EDGE OF 32N AS IT BACKS JUST S OF VORTEX AND HEADS NE 
CARRYING AMPLE SUPPLY OF MOISTURE CENTRAL CALIFORNIA AND THE 
ROCKY MOUNTAINS.  UPSTREAM FROM TROUGH...BROAD MID/UPPER RIDGE 
APPROACHES WRN EDGE OF FORECAST WATERS WITH ABUNDANT MOISTURE 
ENTERING AREA W OF 134W.  OTHERWISE...DRY AIR MASS COVERS REGION 
S OF 20N CURTAILING DEEP CONVECTION EVEN IN ITCZ. 

LARGE UPPER LEVEL ANTICYCLONE OVER SOUTH AMERICA EXTEND WWD INTO 
CARIBBEAN...CENTRAL AMERICA AND FAR E PAC WITH MODERATE TO 
STRONG SUBSIDENCE ACROSS MOST OF AREA LIMITING DEEP CONVECTION.
 
AT THE SURFACE...COLD FRONT EXTENDS FROM 32N122W  23N133W THEN 
STATIONARY TO 23N140W.  BRISK SW WIND WITHIN 120 NM OF FRONTAL 
SURFACE AND NW WIND W OF FRONT TO 136W SHOULD DIMINISH AS UPPER 
LEVEL ENERGY SHIFTS N...FRONT STALL AND BECOMES DIFFUSE.  BROKEN 
TO OVERCAST STRATOCUMULUS CLOUDS NW OF FRONT WITH NO DEEP 
CONVECTION NOTED.  HIGH PRES 1019 MB AT 24N119W FORCED S SHOULD 
DIMINISH TRADES BELOW 20 KT. 

GULF OF PAPAGAYO WINDS EXPECTED TO CONTINUE OVER NEXT 24 HRS 
THEN DIMINISH AS ATLC HIGH PRES RECEDES E UNDER PUSH FROM LOW 
PRES JUST N OF PUERTO RICO. 

$$
WALLY BARNES