000
AXPZ20 KNHC 280918
TWDEP 

TROPICAL WEATHER DISCUSSION                                    
NWS NATIONAL HURRICANE CENTER MIAMI FL                           
1005 UTC SAT APR 27 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 10N86W TO 8N95W TO 8N103W. ITCZ 8N103W TO 5N120W
WHERE IT BREAK IN THE VICINITY OF A SURFACE TROUGH ALONG
122W THEN RESUMES NEAR 8N125W TO 4N135W. SCATTERED MODERATE
TO STRONG CONVECTION WITHIN 100 NM N AND 50 NM S AXIS FROM
112W-115W AND 60 NM EITHER SIDE OF TROUGH FROM 8N-10N.
   
...DISCUSSION... 
AN UPPER LEVEL TROUGH OVER THE FAR NW PORTION OF THE DISCUSSION
AREA FROM 32N134W TO CYCLONIC CIRCULATION NEAR 28N128W TO
27N140W. 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 AN ANTICYCLONIC CIRCULATION
CENTERED NEAR 11N98W TO 32N122W WITH ANOTHER RIDGE EXTENDS
EASTWARD TO CENTRAL AMERICA. A 90-100 KT JETSTREAM EXTENDS
FROM 27N115W ACROSS CENTRAL BAJA CALIFORNIA INTO NORTHERN
MEXICO. 

SURFACE RIDGE IS ACROSS THE AREA N OF 15N W OF 115W WITH A 
TROUGH FROM 13N121W TO 7N122N. THIS HAS TIGHTENED PRES
GRADIENT THE TRADES INCREASED TO 20 TO 25 KT WITH SEAS TO 9 FT
FROM 10N-15N W OF 120W. 

$$
DGS