000
AXPZ20 KNHC 060913
TWDEP 

TROPICAL WEATHER DISCUSSION                                   
NWS NATIONAL HURRICANE CENTER MIAMI FL                         
1005 UTC SAT APR 06 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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...              
MONSOON TROUGH 8N82W TO 5N100W. ITCZ 5N100W TO 4N116W.
SCATTERED MODERATE ISOLATED STRONG CONVECTION WITHIN 175 NM S
OF AXIS FROM 88W-91W AND WITHIN 80 NM N OF AXIS FROM 99W-102W.

...DISCUSSION...                                                
UPPER LEVEL RIDGE OVER THE FAR NW PORTION OF THE DISCUSSION
AREA WITH AXIS FROM 32N130W TO AN ANTICYCLONIC CIRCULATION
NEAR 27N139W. DOWNSTREAM UPPER LEVEL TROUGH  EXTENDS FROM
NORTHERN BAJA CALIFORNIA TO 25N127W TO A CYCLONIC CIRCULATION
NEAR 21N139W. MODERATE TO STRONG SUBSIDENCE WITH DRY STABLE
AIR AT THE MIDDLE AND UPPER LEVELS FROM 20N-30N W OF 115W.
HIGH CLOUDS ARE WITHIN 280 NM S OF LINE FROM 12N135W TO 
24N119W. A BROAD UPPER LEVEL RIDGE IS E OF THE TROUGH.

HIGH PRES BUILDING ACROSS THE GULF OF MEXICO HAS TIGHTENED
THE PRES GRADIENT ACROSS SOUTHERN MEXICO RESULTING IN GALE
FORCE WINDS THROUGH THE GULF OF TEHUANTEPEC. THE GALE FORCE
WINDS ARE FORECAST TO DECREASE TO BELOW GALE FORCE BY LATER
TODAY.

SURFACE HIGH PRES...1028 MB...CENTERED NEAR 30N134W. ELY
WINDS AROUND THE SOUTHERN PERIPHERY OF THE HIGH IS PRODUCING
A TIGHT ENOUGH PRES GRADIENT OF WINDS 20-25 KT FROM 8N-16N
W OF 130W. OTHERWISE AN AREA OF MIXED SW AND NW SWELL TO 9 FT
S OF 20 W OF 125W. NLY WINDS ARE FORECAST TO INCREASE TO 20-25
KT N OF 28N WITH 210 NM W OF THE BAJA CALIFORNIA PENINSULA.

$$
DGS