000
AXPZ20 KNHC 201517
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL 
1605 UTC FRI SEP 20 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 16N98W TO 12N105W TO 12N120W. ITCZ 12N120W TO 
9N140W. SCATTERED MODERATE ISOLATED STRONG CONVECTION WITHIN 50 
NM EITHER SIDE OF AXIS FROM 101W TO 103W.

...DISCUSSION...

A BROAD ANTICYCLONIC CIRCULATION IS CENTERED NEAR 23N117W WITH A 
RIDGE EXTENDING E TO 20N108W AND ANOTHER RIDGE EXTENDING W OF 
THE ANTICYCLONE TO 20N140W. STRONG SUBSIDENCE WITH DRY AND 
STABLE AIR AT THE MIDDLE AND UPPER LEVELS IS W OF 115W. A NARROW 
UPPER LEVEL TROUGH EXTENDS FROM NORTHERN MEXICO TO THE SOUTHERN 
GULF OF CALIFORNIA.

NW SWELL TO 8 FT ARE FORECAST TO MOVE INTO THE NW PORTION OF 
THE AREA N OF 28N W OF 134W SAT. AN AREA OF SW WINDS 20 KT AND 
SEAS TO 8 FT ARE FORECAST FROM 7N-10N BETWEEN 97W-105W EARLY SUN.

FAIRLY BENIGN MARINE CONDITIONS PREVAIL ELSEWHERE ACROSS THE 
AREA.

$$
DGS