000
AXPZ20 KNHC 221527
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL 
1605 UTC SUN SEP 22 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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1500 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... 

MONSOON TROUGH FROM 16N93W TO 11N110W TO 10N140W. SCATTERED 
MODERATE ISOLATED STRONG CONVECTION 60 NM S OF AXIS BETWEEN
111W-117W.

...DISCUSSION...

A WEAKENING UPPER LEVEL TROUGH HAS ACROSS THE FAR N PORTION OF 
THE DISCUSSION AREA WITH AXIS FROM 32N120W TO 29N131W. 
ASSOCIATED DISSIPATING COLD FRONT EXTENDS FROM 32N116W TO 
29N123W. NO SIGNIFICANT WEATHER ASSOCIATED WITH THE FRONT AND 
TROUGH. OTHERWISE A BROAD UPPER LEVEL ANTICYCLONIC CIRCULATION 
DOMINATES THE REMAINDER OF THE DISCUSSION AREA. THE ANTICYCLONE 
IS CENTERED NEAR 24N115W WITH A RIDGE EXTENDING NE INTO NORTHERN 
MEXICO AND ANOTHER RIDGE EXTENDING W OF THE ANTICYCLONE TO 
15N140W. STRONG SUBSIDENCE WITH DRY AND STABLE AIR AT THE MIDDLE 
AND UPPER LEVELS IS N OF 12N W OF 110W. UPPER LEVEL DIFFLUENCE 
IS ENHANCING SCATTERED MODERATE TO STRONG CONVECTION FROM 7N-11N 
BETWEEN 84W-100W.

NW SWELL TO 8 FT IN THE N PORTION OF THE AREA N OF 27N W OF 130W 
AND N OF 29N BETWEEN 117W-130W WILL SHIFT E MON TO N OF 28N 
BETWEEN 116W-123W. AN AREA OF SW WINDS 20 KT AND SEAS TO 8 FT 
FROM 6N-9N BETWEEN 97W-110W WILL SUBSIDE TO LESS THAN 8 FT MON 
NIGHT.

FAIRLY BENIGN MARINE CONDITIONS PREVAIL ELSEWHERE ACROSS THE 
AREA.

$$
DGS