000
AXPZ20 KNHC 170918
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC SUN AUG 17 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.

...SPECIAL FEATURE...
ISELLE HAS BEEN DOWNGRADED TO A REMNANT LOW NEAR 19N113W 1009 MB 
MOVING WEST 5 KNOTS. MAXIMUM SUSTAINED WIND 25 TO 25 KT.  THERE 
IS NO CONVECTION CURRENTLY ASSOCIATED WITH THE LOW...HOWEVER 
ISOLATED CONVECTION TEMPORARILY DEVELOP WITHIN THE LOW LEVEL 
CIRCULATION WITH EXTENDS OUT ABOUT 200 NM FROM THE CENTER.
SOUTHEAST TO SOUTH SHEAR OVER THE SYSTEM AND COOL SEA SURFACE 
TEMPERATURES INDICATED CONVECTION WILL NOT LIKELY RETURN IN AN 
ORGANIZED PATTERN. AT 0300 UTC NHC ISSUED ITS LAST ADVISORY 
UNLESS REGENERATION OCCURS. SEE THE LAST NHC FORECAST/ADVISORY 
UNDER AWIPS/WMO HEADER MIATCMEP5/WTPZ25 KNHC FOR MORE DETAILS.

...TROPICAL WAVES...
NONE.

...ITCZ...
ITCZ IS ALONG THE LINE...06N77W TO 10N105W TO 11N115W TO 09N130W 
TO 10N140W. SCATTERED MODERATE TO STRONG CONVECTION IS WITHIN 75 
NM OF THE POINT 12.5N88.5W. SCATTERED MODERATE WITH ISOLATED 
STRONG CONVECTION IS WITHIN 60 NM EITHER SIDE OF THE AXIS FROM 
86W TO 91W. SCATTERED MODERATE WITH ISOLATED STRONG CONVECTION 
IS WITHIN 50 NM EITHER SIDE OF THE AXIS FROM 107W TO 118W.

...DISCUSSION...
DEEP LAYER TROUGH IS NORTHWEST OF A LINE THROUGH 32N120W TO 
20N128W TO 13N140W. THE AREA IS DRY AND CLOUD FREE IN THE 
MIDDLE AND UPPER LEVELS WITH MOSTLY BROKEN STRATOCUMULUS IN THE 
LOWER LEVELS.

ANOTHER AREA OF CYCLONIC FLOW IS FROM 85W TO 100W. THIS FEATURE 
IS PRIMARILY AN UPPER FEATURE. ENHANCED CONVECTION IS NOTED IN 
THE ITCZ FROM 85W TO 90W AND ALSO NEAR THE CENTRAL AMERICAN 
COAST FROM 86W TO 93W. 

ELSEWHERE...OTHER THAN OVER THE REMNANT OF ISELLE...BROAD 
ANTICYCLONIC FLOW IS ANALYZED.

THE AREA EAST OF THE TROUGH MENTIONED IN THE FIRST PARAGRAPH IS 
MOIST IN THE MIDDLE AND UPPER LEVELS WITH AREAS OF MULTI LEVEL 
CLOUDS WITH EMBEDDED AREAS OF CONVECTION.

WEAK RIDGE IS NORTH OF A LINE FROM SOUTHERN BAJA CALIFORNIA TO 
NEAR 13N140W. ELSEWHERE EXCEPT FOR THE REMNANT OF ISELLE A BROAD 
TROUGH IS ANALYZED.

$$
LL