000
AXPZ20 KNHC 031538
TWDEP 

TROPICAL WEATHER DISCUSSION                                   
NWS NATIONAL HURRICANE CENTER MIAMI FL                         
1605 UTC WED APR 03 2013

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 
1500 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...              
MONSOON TROUGH 9N84W TO 5N99W. THEN ITCZ 5N99W 6N115W
4N122W SCATTERED MODERATE TO STRONG CONVECTION WITHIN 60
NM N OF AXIS FROM 85W-88W.

...DISCUSSION...                                               
UPPER LEVEL TROUGH OVER THE FAR NW PORTION OF THE DISCUSSION
AREA WITH AXIS FROM 32N139W TO 20N137W. SCATTERED SHOWERS
ARE WITHIN 250 NM E OF THE TROUGH N OF 25N. A 95-100 KT JET
STREAM AROUND THE BASE OF THE TROUGH FROM 26N140W TO 32N135W.
ABUNDANT MIDDLE AND UPPER LEVEL MOISTURE IS WITHIN 600 NM
OF LINE 15N140W TO 25N132W. DOWNSTREAM UPPER LEVEL RIDGE 
EXTENDS FROM 32N121W TO 17N121W. MODERATE TO STRONG SUBSIDENCE
WITH DRY AND STABLE AIR AT THE MIDDLE AND UPPER LEVELS IS
E OF THE RIDGE AXIS. AN UPPER LEVEL TROUGH EXTENDS FROM THE
BIG BEND OF TEXAS ACROSS MEXICO TO 2N103W. IN THE DEEP
TROPICS AN UPPER LEVEL ANTICYCLONIC CIRCULATION IS CENTERED
NEAR 3N195W.

COLD FRONT EXTENDS FROM 32N133W TO 23N140W WITH A 1021 MB 
SURFACE HIGH PRES IS NEAR 27N126W. THE PRES GRADIENT BETWEEN
THE HIGH AND THE FRONT ARE PRODUCING SW WINDS 20-25 KT WITHIN
180 NM E OF THE FRONT. THE FRONT IS FORECAST TO DISSIPATE
THU AND WINDS WILL DECREASE TO LESS THAN 20 KT.

$$
DGS