000
AXPZ20 KNHC 051513
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1600 UTC SUN SEP 05 2010

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W.

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1500 UTC.

...ITCZ...
INTERTROPICAL CONVERGENCE ZONE AXIS FROM 07N78W TO 10N88W THEN 
RESUMES AT 14N108W TO 11N125W TO 12N140W. ISOLATED MODERATE FROM 
10N TO 13N BETWEEN 115W AND 122W. SIMILAR CONVECTION IS FROM 08N 
TO 10N BETWEEN 121W AND 124W.

...DISCUSSION...
A LARGE UPPER LEVEL ANTICYCLONE PREVAILS OVER THE NORTHERN PART 
OF THE FORECAST AREA. NORTHEASTERLY UPPER LEVEL FLOW PREVAILS 
OVER THE DEEP TROPICS. THIS FLOW IS ADVECTING UPPER LEVEL 
MOISTURE FROM CONVECTION OVER CENTRAL AMERICA AND MEXICO 
WESTWARD.

SURFACE RIDGING EXTENDS SSE FROM A 1036 MB HIGH NW OF THE AREA 
FROM 32N136W TO 20N121W. WITH A 1002 MB LOW PRESSURE CENTERED 
OVER THE FAR SW U.S. THERE IS A TIGHT PRESSURE GRADIENT BETWEEN 
THESE TWO FEATURES. THIS GRADIENT IS SUPPORTING NORTHERLY GALE 
FORCE WINDS OFF THE COAST OF CALIFORNIA. THIS WILL PRODUCE 
NORTHERLY SWELLS WHICH ARE FORECAST TO MOVE INTO THE NORTHERN 
PORTION OF THE FORECAST AREA LATE SUN NIGHT...WITH SEAS EXPECTED 
TO REACH 11 FT BY TUE MORNING.

$$
AL