000
AXPZ20 KNHC 180913
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC MON AUG 18 2008

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. 

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0845 UTC.

...TROPICAL WAVES...
NONE.

...ITCZ...
ITCZ IS ALONG THE LINE...06N77W TO 09N110W TO 12N120W TO 
09N140W. SCATTERED MODERATE WITH ISOLATED STRONG CONVECTION IS 
WITHIN THE AREA 50 NM EITHER SIDE OF THE AXIS FROM 114W TO 122W.
SCATTERED MODERATE WITH ISOLATED STRONG CONVECTION IS WITHIN 60 
NM OF THE POINT 10N134W.

...DISCUSSION...

LOW...REMNANT OF ISELLE...LOCATED NEAR 19N115W WITH CENTRAL 
PRESSURE 1008 MB AND MOVING SLOWLY WEST SOUTHWEST. THE LOW LEVEL 
CIRCULATION CONTINUES TO BE WELL DEFINED AND AN AREA OF 
CONVECTION HAS DEVELOPED WITHIN THE CIRCULATION WITH SCATTERED 
MODERATE WITH ISOLATED STRONG CONVECTION WITHIN 60 NM OF THE 
POINT 19N117.5W. THE LOW IS NOT FORECAST TO DEVELOP BECAUSE OF 
SOUTHEASTERLY SHEAR OVER THE LOW...HOWEVER CONVECTION COULD 
INTERMITTENTLY FORM WITHIN THE LOW LEVEL CIRCULATION.  

MIDDLE AND UPPER LEVEL TROUGH IS OVER THE NORTHWEST PART OF THE 
AREA NORTHWEST OF A LINE THROUGH 32N120W TO 12N130W TO 11N140W. 
THE AREA IS DRY AND CLOUD FREE IN THE MIDDLE AND UPPER LEVELS 
WITH PATCHES OF BROKEN TO OVERCAST STRATOCUMULUS CLOUDS.

ANTICYCLONE OVER NORTHERN MEXICO DOMINATES THE AREA EAST OF THE 
ABOVE TROUGH. THIS AREA IS MOIST IN THE MIDDLE AND UPPER LEVELS 
WITH AREAS OF MULTI LEVEL CLOUDS AND EMBEDDED AREAS OF 
CONVECTION.

WEAK RIDGE IS NORTH OF 20N WEST OF 120W. ELSEWHERE EXCEPT FOR 
THE REMNANT OF ISELLE A BROAD TROUGH IS ANALYZED OVER THE 
AREA.

$$
LL