000
AXPZ20 KNHC 092130
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC SUN AUG 09 2009

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 
2115 UTC.

...SPECIAL FEATURE...

TROPICAL DEPRESSION NINE-E HAS FORMED AND IS CENTERED NEAR 14.0N 
120.3W...OR ABOUT 800 NM SW OF THE SOUTHERN TIP OF BAJA 
CALIFORNIA...AT 09/2100 UTC MOVING W AT 7 KT. MAXIMUM SUSTAINED 
WIND SPEED IS 30 KT WITH GUSTS TO 40 KT. ESTIMATED MINIMUM 
CENTRAL PRESSURE IS 1007 MB. SEE LATEST NHC FORECAST/ADVISORY 
UNDER AWIPS/WMO HEADERS MIATCMEP4/WTPZ24 KNHC FOR MORE DETAILS. 
SCATTERED MODERATE TO STRONG CONVECTION IS LOCATED WITHIN 45 NM 
OF THE DEPRESSION. THE LATEST VISIBLE SATELLITE IMAGERY 
INDICATES A WELL-DEFINED BAND OVER THE NW SEMICIRCLE. THE 
DEPRESSION IS EXPECTED TO MOVE SLOWLY WNW OVER THE NEXT SEVERAL 
DAYS AND GRADUALLY INTENSIFY.

...TROPICAL WAVES...

TROPICAL WAVE ALONG 87W N OF 05N AND INTO CENTRAL AMERICA IS 
MOVING W 10 TO 15 KT. MINIMAL DISORGANIZED CONVECTION IS 
ASSOCIATED WITH THE WAVE. 

TROPICAL WAVE PREVIOUSLY ALONG 101W HAS BEEN REPOSITIONED TO THE 
E ALONG 98W N OF 04N TO JUST INLAND ALONG THE MEXICAN COAST AND 
IS MOVING W AT 10 KT. THE WAVE IS REPOSITIONED MAINLY DUE TO 
VISIBLE SATELLITE IMAGERY. A LARGE AREA OF SCATTERED MODERATE 
ISOLATED STRONG CONVECTION IS LOCATED UP TO THREE DEGREES EITHER 
SIDE OF THE WAVE AXIS. A LOW IS FORECAST TO DEVELOP ALONG THE 
WAVE NEAR 12N105W IN 24 HOURS. 

TROPICAL WAVE ALONG 130W FROM 05N TO 14N 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 08N78W TO 
10N97W TO 10N100W TO 09N118W TO 11N132W TO 08N140W. SCATTERED 
MODERATE ISOLATED STRONG CONVECTION IS LOCATED WITHIN 120 NM OF 
THE AXIS E OF 85W AND WITHIN 120 NM N OF THE AXIS W OF 130W. 

...DISCUSSION...

W OF 115W...
A LARGE MIDDLE/UPPER LEVEL TROUGH WITH CYCLONIC FLOW COVERS THE 
AREA N OF 20N BETWEEN ABOUT 118W AND 135W WITH THE AXIS ALONG 
129W. FURTHER SOUTH TO THE EQUATOR WINDS ALOFT BETWEEN 115W AND 
125W ARE MOSTLY NE AND LIGHT TO MODERATE AND BECOME MORE 
EASTERLY W OF 125W TO BEYOND 140W. AT THE SURFACE A RIDGE IS 
LOCATED ROUGHLY N OF 20N W OF 120W. ALONG AND OFF THE W COAST OF 
BAJA CALIFORNIA NW TO N WINDS ARE 20 KT AND SEAS TO 10 FT. FROM 
13N TO 18N W OF 132W NE WINDS ARE 20 KT AND SEAS TO 8 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 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