000
AXPZ20 KNHC 300919
TWDEP 

TROPICAL WEATHER DISCUSSION                                    
NWS NATIONAL HURRICANE CENTER MIAMI FL                           
1005 UTC TUE APR 30 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 8N784W TO 7N100W. ITCZ 7N100W 8125W TO 5N1140W.
SCATTERED MODERATE TO STRONG CONVECTION WITHIN 60 NM N AND 90
NM S OF AXIS. SCATTERED MODERATE ISOLATED STRONG CONVECTION
WITHIN 250 NM N OF AXIS FROM 115W-132W.
  
...DISCUSSION... 
AN UPPER LEVEL TROUGH OVER THE FAR NW PORTION OF THE DISCUSSION
AREA FROM 32N127W TO CYCLONIC CIRCULATION NEAR 28N138W TO
21N140W. MODERATE TO STRONG SUBSIDENCE WITH DRY AND STABLE AIR
AT THE MIDDLE AND UPPER LEVELS IS N OF 25N W OF 110W. A BROAD
UPPER LEVEL RIDGE EXTENDS FROM ANTICYCLONIC CIRCULATION CENTERED
NEAR 11N111W TO 30N122W.  MOSTLY ZONAL WESTERLY FLOW E OF THE
TROUGH. A 95-100 KT JETSTREAM FROM 25N125W TO SOUTHERN BAJA
CALIFORNIA INTO CENTRAL MEXICO. A BROAD UPPER LEVEL TROUGH
IS E OF THE RIDGE. UPPER LEVEL DIFFULENT FLOW IS ENHANCING
CONVECTION FROM 3N-13N BETWEEN 121W AND 133W.

SURFACE RIDGE IS ACROSS THE AREA N OF 15N W OF 120W. THE 
RIDGE HAS WEAKEND AND THE TRADES HAVE DECREASED TO 20 KT
OR LESS. HOWEVER SEAS ARE TO 8 FT IN MIXED NE AND SW SWELL
FROM 08N-14N W OF BETWEEN 128W-135W. THE SWELL IS FORECAST
TO SUBSIDE TO BELOW 8 FT TONIGHT. NLY SWELLS TO 9 FT ARE
FORECAST TO MOVE INTO THE AREA N OF 28N BETWEEN 128W-153W
LATER TODAY. 

$$
DGS