000
AXPZ20 KNHC 010922
TWDEP 

TROPICAL WEATHER DISCUSSION                                    
NWS NATIONAL HURRICANE CENTER MIAMI FL                           
1005 UTC WED MAY 01 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 9N84W TO 6N105W. ITCZ 6N105W TO 8N130W.
SCATTERED MODERATE ISOLATED STRONG CONVECTION WITHIN 170 NM
S OF AXIS FROM 92W-97W. 
  
...DISCUSSION... 
AN UPPER LEVEL TROUGH OVER THE FAR NW PORTION OF THE DISCUSSION
AREA FROM 31N123W TO CYCLONIC CIRCULATION NEAR 28N134W TO
11N140W. MODERATE TO STRONG SUBSIDENCE WITH DRY AND STABLE AIR
AT THE MIDDLE AND UPPER LEVELS IS N OF 25N W OF 110W AND FROM
10N-25N W OF 125W. A BROAD UPPER LEVEL RIDGE EXTENDS FROM
ANTICYCLONIC CIRCULATION CENTERED NEAR 11N110W TO 30N120W
AND ANOTHER RIDGE EXTENDING E TO THE COAST OF EL SALVADOR.
MOSTLY ZONAL WESTERLY FLOW E OF THE TROUGH WITH A 90-95 KT
JETSTREAM FROM SOUTHERN BAJA CALIFORNIA INTO CENTRAL MEXICO.

SURFACE RIDGE IS ACROSS THE AREA N OF 15N W OF 115W. 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 11N-14N W OF W OF 135W. THE SWELL IS FORECAST TO SUBSIDE
TO BELOW 8 FT TONIGHT. NLY SWELLS TO 9 FT ARE N OF 28N BETWEEN
121W-135W ARE FORECAST TO SUBSIDE TO LESS THAN 8 FT THU NIGHT. 

$$
DGS