000
AXPZ20 KNHC 240927
TWDEP 

TROPICAL WEATHER DISCUSSION   
NWS NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC SAT MAR 24 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 7N116W 5N126W 3N140W. NO SIGNIFICANT CONVECTION.

...DISCUSSION...

A DEEP LAYERED TROUGH N OF 24N W OF 120W IS SUPPORTING A COLD 
FRONT ENTERING THE DISCUSSION AREA NEAR 32N127W TO 27N140W. THE 
UPPER TROUGH WILL CONTINUE TO DEEPEN AS IT MOVES EASTWARD OVER 
THE NEXT COUPLE OF DAYS. NW WINDS OF 20 KT BEHIND THE FRONT WILL 
INCREASE TO 20-25 KT THIS AFTERNOON AS THE FRONT EXTENDS FROM 
32N125W TO 25N130W. GALE FORCE WINDS WILL OCCUR JUST N OF 32N BY 
EARLY SUN. LARGE NW SWELL W OF THE FRONT COULD REACH 20 FT EARLY 
SUN.

AN UPPER LEVEL RIDGE IS E OF THE TROUGH ACROSS MEXICO. ZONAL WLY 
UPPER LEVEL FLOW IS  S OF 20N.

A PERSISTENT SURFACE TROUGH WITH AXIS FROM 7N83W TO 25N90W TO 
2N096W. ISOLATED SHOWERS ARE WITHIN 150 NM SE OF THE TROUGH.

SURFACE RIDGE ENTERS THE DISCUSSION AREA FROM 25N140W TO NEAR 
THE S TIP OF BAJA CALIFORNIA WILL WEAKEN WITH THE APPROACH OF 
THE UPCOMING COLD FRONT. A WEAK PRES GRADIENT S OF THE RIDGE 
WITH TRADES LESS THAN 20 KT.

$$
DGS