000
AXPZ20 KNHC 091526
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC SUN AUG 09 2009

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 
1515 UTC.

...TROPICAL WAVES...

TROPICAL WAVE ALONG 85W N OF 05N AND INTO CENTRAL AMERICA IS 
MOVING W 10 TO 15 KT. MINIMAL DISORGANIZED CONVECTION IS 
ASSOCIATED WITH THE WAVE. 

TROPICAL WAVE ALONG 101W N OF 05N TO JUST INLAND ALONG THE 
MEXICAN COAST IS MOVING W AT 15 KT. A LARGE AREA OF SCATTERED 
MODERATE ISOLATED STRONG CONVECTION IS LOCATED MAINLY E OF THE 
WAVE AXIS TO ABOUT 93W. EARLY MORNING VISIBLE AND WATER VAPOR 
IMAGERY INDICATES SOME ORGANIZATION AT THE MIDDLE LEVELS AND 
CENTERED NEAR 09N98W. 

TROPICAL WAVE FROM 15N128W TO 04N130W IS MOVING W AT ABOUT 10 
KT. MINIMAL DISORGANIZED CONVECTION IS ASSOCIATED WITH THE WAVE 
IN A CONFINED AREA FROM 12N TO 14N AND UP TO 3 DEGREES EITHER 
SIDE OF THE WAVE AXIS.

...ITCZ...

THE INTERTROPICAL CONVERGENCE ZONE IS ALONG THE LINE 08N82W TO 
09N100W TO 10N111W TO 13N118W TO 08N140W. SCATTERED MODERATE 
ISOLATED STRONG CONVECTION IS LOCATED WITHIN 120 NM OF THE AXIS 
E OF 85W AND WITHIN 180 NM OF THE AXIS BETWEEN 95W AND 103W. 
SCATTERED MODERATE CONVECTION IS LOCATED WITHIN 120 NM N OF THE 
AXIS W OF 124W.

...DISCUSSION...

W OF 115W...
A LARGE MIDDLE/UPPER LEVEL TROUGH WITH CYCLONIC FLOW COVERS THE 
AREA N OF 20N BETWEEN ABOUT 115W AND 135W WITH THE AXIS ALONG 
128W. FURTHER SOUTH TO THE EQUATOR WINDS ALOFT BETWEEN 115W AND 
125W ARE NE AND LIGHT TO MODERATE AND BECOME MORE EASTERLY W OF 
125W TO BEYOND 140W. AT THE SURFACE A 1009 MB LOW IS LOCATED 
NEAR 14N120W AND IS MOVING NW ABOUT 10 KT. SCATTERED MODERATE TO 
STRONG CONVECTION IS LOCATED WITHIN 45 NM OF THE LOW CENTER. A 
RIDGE IS LOCATED ROUGHLY N OF 20N W OF 120W. OVER THE AREA N OF 
27N E OF 122W NW TO N WINDS ARE 20 KT AND SEAS 10 FT.

E OF 115W...
A MIDDLE/UPPER LEVEL TROUGH HAS ITS AXIS LOCATED ALONG 110W FROM 
08N TO 23N. CYCLONIC FLOW IS LOCATED UP TO 6 DEGREES EITHER SIDE 
OF THE TROUGH AXIS. MODERATE EASTERLY TO NORTHEASTERLY WINDS 
ALOFT ARE LOCATED E OF ABOUT 95W INTO NORTHERN SOUTH AMERICA. 
BROAD UPPER LEVEL RIDGE COVERING THE GULF OF MEXICO EXTENDS S TO 
THE GULF OF TEHUANTEPEC AND ADJACENT WATERS. IN THE AREA FROM 
10N TO 12N E OF 92W INCLUDING THE GULF OF PAPAGAYO NE TO E WINDS 
ARE 20 TO 25 KT AND SEAS TO 8 FT.

$$
CAB