000
AXPZ20 KNHC 061517
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC MON SEP 06 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...
AXIS FROM FROM 08N78W TO 13N90W THEN RESUMES AT 12N112W TO 
13N110W TO 08N130W TO 12N140W. SCATTERED MODERATE CONVECTION 
FROM 10N TO 12N BETWEEN 89W AND 91W. NO SIGNIFICANT CONVECTION 
ELSEWHERE.

...DISCUSSION...

ALOFT...A LARGE UPPER LEVEL ANTICYCLONE IS CENTERED NEAR 24N125W 
WITH RIDGE EXTENDING SW TO 18N140W. NE UPPER LEVEL FLOW PREVAILS 
OVER THE DEEP TROPICS. THIS FLOW IS ADVECTING UPPER LEVEL 
MOISTURE FROM ITCZ CONVECTION AND TROPICAL STORM HERMINE SW OVER 
THE DEEP TROPICS. 

SURFACE...
HIGH PRES RIDGE EXTENDS SE FROM A STRONG HIGH PRESSURE CENTERED 
NEAR 41N150W SE TO 27N124W. 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 PROPAGATE INTO THE NORTHERN PART OF THE AREA 
WITH SEAS TO 11 FT ARE EXPECTED BY TOMORROW AFTERNOON. 

$$
AL