000
AXPZ20 KNHC 060925
TWDEP 

TROPICAL WEATHER DISCUSSION      
NWS NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC SUN MAY 06 2012

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 IS ALONG 11N86W TO 7N102W. THE ITCZ FROM 7N102W 
TO 1010 MB LOW PRES 7N116W TO 3N140W. SCATTERED MODERATE TO 
STRONG CONVECTION WITHIN 140 NM N OF AXIS FROM 113W-116W AND 
WITHIN 90 NM S OF AXIS FROM 116W-119W.

...DISCUSSION...
AN UPPER LEVEL TROUGH WITH AXIS FROM 32N121W TO 26N137W. 
OTHERWISE MOSTLY ZONAL WLY UPPER LEVEL FLOW S OF THE TROUGH TO 
13N. MODERATE TO STRONG SUBSIDENCE WITH DRY STABLE AIR AT THE 
MIDDLE LEVELS IS N OF 10N W OF 105W. A 70-75 KT JETSTREAM 
EXTENDS FROM 23N125W TO 26N116W. IN THE DEEP TROPICS AN EAST TO 
WEST UPPER LEVEL RIDGE EXTENDS FROM PANAMA TO 9N117W. AN EMBEDDED
ANTICYCLONIC CIRCULATION WITHIN THE RIDGE AXIS IS CENTERED NEAR 
5N87W. DIFFLUENT FLOW ALOFT ASSOCIATED WITH THE ANTICYCLONE IS 
ENHANCING CONVECTION S OF THE MONSOON TROUGH FROM 85W-90W.

HIGH PRES N OF THE AREA HAS STRENGTHENED AND NLY WINDS HAVE 
INCREASED TO 20-25 KT N OF AROUND 20N W OF 125W. LARGE NW SWELLS 
TO 1O FT HAVE PROPAGATED INTO THE AREA N OF 25N BETWEEN 
120W-130W. TRADES AROUND THE SOUTHERN PERIPHERY OF THE RIDGE 
HAVE INCREASED TO 20 KT FROM 5N-20N W OF 130W.

SURFACE TROUGH ANALYZED ALONG THE ITCZ FROM 10N115W TO A 1010 MB 
LOW PRES NEAR 7N116W WITH THE TROUGH CONTINUING TO 4N116W. 
CONVECTION AS DESCRIBED IN THE ITCZ/MONSOON TROUGH SECTION.

$$
DGS