000
AXPZ20 KNHC 230918
TWDEP 

TROPICAL WEATHER DISCUSSION   
NWS NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC FRI MAR 23 2012

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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
ITCZ AXIS EXTENDS FROM 7N120W TO 2N140W. NO SIGNIFICANT 
CONVECTION. 

...DISCUSSION...
UPPER LEVEL TROUGH IS OVER THE NW PORTION OF THE DISCUSSION AREA 
SUPPORTING A COLD FRONT THAT EXTENDS THROUGH 32N120W 27N132W. A 
100-115 KT JETSTREAM EXTENDS FROM 29N135W TO 32N128W. THE UPPER 
TROUGH WILL CONTINUE TO DIG S AND THE FRONT WILL MOVE SE AND 
GRADUALLY DISSIPATE THROUGH THE NEXT 12 TO 24 HOURS WITH A 
SECOND STRONGER COLD FRONT MOVING INTO THE NW CORNER OF THE 
DISCUSSION AREA BY THIS AFTERNOON. VERY LARGE SWELLS IN THE 
12-18 FT RANGE ARE POSSIBLE BY EARLY SUN.

A RATHER PERSISTENT SURFACE TROUGH EXTENDING FROM 6N89W TO 
1N100W. NO SIGNIFICANT WEATHER ASSOCIATED WITH THE TROUGH.

UPPER LEVEL ANTICYCLONIC CIRCULATION IS CENTERED OVER NORTHERN 
MEXICO NEAR 27N106W. MODERATE TO STRONG SUBSIDENCE WITH DRY AIR 
AT THE MIDDLE AND UPPER LEVELS IS N OF 11N E OF 120W. OTHERWISE 
MOSTLY ZONAL WLY FLOW IS S OF 20N.

ELY WINDS TO 20 KT ARE BLOWING THROUGH THE GULF OF PAPAGAYO WILL 
DECREASE TO LESS THAN 20 BY LATE SAT.

$$
DGS