000
AXPZ20 KNHC 071603
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC TUE SEP 07 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 13N107W TO 10N130W TO 13N140W. SCATTERED MODERATE 
TO ISOLATED STRONG CONVECTION FROM 06N TO 10N BETWEEN 90W AND 
100W...FROM 10N TO 13N BETWEEN 87W AND 92W...AND FROM 11N TO 12N 
BETWEEN 112W AND 113W.

...DISCUSSION...
RIDGE EXTENDS W FROM ANTICYCLONE OVER CENTRAL MEXICO TO ANOTHER 
ANTICYCLONE AT 22N128W WHILE SMALL SHORTWAVE DIGS S BETWEEN THEM 
ALONG 114W N OF 25N.  WATER VAPOR IMAGERY SHOWS SHARP CUT-OFF 
SWATH OF DRY STABLE AIR MASS ALOFT FROM 15N TO 23N W OF 109W.  
BROAD UPPER LEVEL CYCLONE OVER GULF OF MEXICO ENHANCES ADVECTION 
OF TROPICAL MOISTURE FROM T.S. HERMINE OUTFLOW THROUGH CENTRAL 
PLAINS WHILE BRINGING STRONG NE FLOW TO E PAC DEEP TROPICS.  
THIS IN TURN CREATES ADVERSE SHEAR ENVIRONMENT ALOFT FOR ANY  
PERSISTENT DEEP CONVECTION OR TROPICAL CYCLONE TO DEVELOP.

AT THE SURFACE...
HIGH PRES CENTER 1032 MB WELL NW OF BASIN EXTENDS RIDGE FROM 
32N135W20N120W THROUGH FORECAST PERIOD.  WEAK LOW PRES CENTER 
JUST W OF 140W HAS MINOR EFFECT ON CAUSING 8 FT SEAS JUST W OF 
135W THROUGH NEXT 24 HRS ONLY.

$$
WALLY BARNES