000
AXPZ20 KNHC 072138
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC TUE SEP 07 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 12N87W TO 14N102W TO 10N128W TO 13N140W.  SCATTERED 
MODERATE TO ISOLATED STRONG CONVECTION WITHIN 90 NM S OF AXIS 
FROM 107W TO 113W.

...DISCUSSION...
RIDGE EXTENDS W FROM ANTICYCLONE OVER CENTRAL MEXICO TO SECOND 
ANTICYCLONE AT 23N128W 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 N OF ITCZ AXIS TO 23N W OF 
109W.  BROAD UPPER LEVEL ANTICYCLONE 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.  WITH LITTLE UPLIFT MECHANISMS AND STRONG NE 
SHEAR ALOFT ...ADVERSE ENVIRONMENT IS CREATED 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 
32N137W TO 23N120W THROUGH FORECAST PERIOD.  WEAK LOW PRES 
CENTER JUST W OF 140W HAS MINOR EFFECT ON CAUSING SUBSIDING 8 FT 
SWELLS JUST W OF 135W THROUGH NEXT 24 HRS ONLY.

$$
WALLY BARNES