000
AXPZ20 KNHC 062124
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC MON SEP 06 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...
AXIS FROM FROM 08N80W TO 13N90W THEN RESUMES AT 12N115W TO 
13N110W TO 09N127W TO 13N137. NO SIGNIFICANT CONVECTION.

...DISCUSSION...

ALOFT...A LARGE UPPER LEVEL ANTICYCLONE CENTERED NEAR 23N125W 
WITH RIDGE EXTENDING SW TO 18N140W PREVAILS ACROSS THE FORECAST 
AREA N OF 13N AND WEST OF 120W. A SHORTWAVE TROUGH IS EAST OF 
THIS UPPER ANTICYCLONE N OF 15N. WATER VAPOR IMAGERY INDICATES 
VERY DRY UPPER LEVEL CONDITIONS PREVAIL IN THE FAR NE PART OF 
THE AREA. ELSEWHERE...NE UPPER LEVEL FLOW PREVAILS OVER THE DEEP 
TROPICS. THIS FLOW IS ADVECTING UPPER LEVEL MOISTURE FROM 
TROPICAL STORM HERMINE AND CENTRAL AMERICA SW OVER THE DEEP 
TROPICS. 

SURFACE...HIGH PRES RIDGE EXTENDS SE FROM A STRONG HIGH PRESSURE 
1033 MB CENTERED NEAR 42N151W SE TO 23N120W. THERE IS A TIGHT 
PRESSURE GRADIENT BETWEEN THIS HIGH PRESSURE CENTER AND LOW 
PRESSURE OVER THE SW U.S. THAT IS SUPPORTING NORTHERLY GALE 
FORCE WINDS OFF THE COAST OF CALIFORNIA. THE GALE FORCE WINDS 
HAVE GENERATED NORTHERLY SWELLS WHICH WILL AFFECT THE NORTHERN 
PART OF THE AREA WITH SEAS TO 11 FT EXPECTED BY TOMORROW 
AFTERNOON. 

$$
AL