000
AXPZ20 KNHC 052115
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2200 UTC SUN SEP 05 2010

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

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2100 UTC.

...ITCZ...
INTERTROPICAL CONVERGENCE ZONE AXIS FROM 08N78W TO 11N90W THEN 
RESUMES FROM 14N109W TO 10N127W TO 12N137W.  SCATTERED MODERATE 
ISOLATED STRONG N OF 04N E OF 90W.  ISOLATED MODERATE WITHIN 45 
NM OF AXIS FROM 113W TO 122W.

...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 STRONG 1037 MB HIGH NW OF THE 
AREA FROM 42N147W TO 25N126W. 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