000
AXPZ20 KNHC 300924
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC TUE MAY 30 2006

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS 
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND 
METEOROLOGICAL ANALYSIS.

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC.

...SPECIAL FEATURE...

TROPICAL DEPRESSION ALETTA IS ESTIMATED NEAR 16.0N 102.8W AT 
0900 UTC.  THE CENTER OF ALETTA WAS LOCATED ABOUT 120 MILES 
SOUTH OF ZIHUATANEJO MEXICO.  ALETTA IS MOVING W AT 4 KT. 
ESTIMATED MINIMUM CENTRAL PRESSURE IS 1005 MB. MAXIMUM SUSTAINED 
WIND SPEED IS 30 KT WITH GUSTS TO 40 KT.  CONVECTION HAS 
RETURNED TO NEAR THE CENTER WITH SCATTERED TO NUMEROUS STRONG 
WITH 90 NM SE QUADRANT AND ELSEWHERE WITHIN 45 NM OF CENTER.
SEE LATEST NHC FORECAST/ADVISORY UNDER AWIPS/WMO HEADERS 
MIATCMEP1/WTPZ21 KNHC FOR MORE DETAILS. 

...TROPICAL WAVES...

TROPICAL WAVE ALONG 99W FROM FROM 2N TO 13N MOVE W 10 KT.
ISOLATED MODERATE CONVECTION NOTED WITHIN 90 NM OF THE WAVE AXIS 
FROM 5N TO 9N.

TROPICAL WAVE ALONG 115W FROM 8N TO 15N MOVE W 10 KT. AS 
MENTIONED IN THE ITCZ SECTION SCATTERED MODERATE WITH ISOLATED 
STRONG CONVECTION IS WITHIN 90 NM OF THE POINT 13.3N111.7W.
IN ADDITION WEAKENING MODERATE CONVECTION IS WITHIN 75 NM OF 
10.8N116.4W.  THE CONVECTION DOES NOT SHOW ANY SIGNS OF 
ORGANIZATION AT THIS TIME.

..ITCZ...

ITCZ AXIS IS CENTERED ALONG...6N77W 7N100W 13N112W 7N125W 8N140W.
SCATTERED MODERATE WITH ISOLATED STRONG CONVECTION IS WITHIN 120 
NM OF THE POINT 12.5N110.5W.

...DISCUSSION...

A FAIRLY FLAT HEIGHT PATTERN IS OVER THE AREA.

BROAD TROUGH IS NORTH OF 20N.  FROM 20N TO 30N THE UPPER AND 
MIDDLE LEVELS ARE DRY IMPLYING UPPER LEVEL SUBSIDENCE.  SKIES 
ARE CLEAR IN THE MIDDLE AND UPPER LEVELS NORTH OF 20N WITH 
MOSTLY OVERCAST STRATOCUMULUS IN THE LOWER LEVELS.

REMAINDER OF THE AREA IS COVERED BY MIDDLE AND UPPER LEVEL RIDGE.
SOME UPPER LEVEL CLOUDINESS IS OBSERVED SOUTH OF 20N.  THIS 
CLOUDINESS IS THE RESULT OF ITCZ CONVECTION AND THE ADVECTION OF 
MOISTURE FROM THAT REGION NORTHWARD TO NEAR 20N.

LARGE SURFACE HIGH PRESSURE IS OVER THE AREA NORTH OF THE ITCZ 
WEST OF 110W.  THE HIGH IS CENTERED NEAR 31N136W AND HAS A  1027 
MB CENTRAL PRESSURE.
  
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LL