000
AXPZ20 KNHC 040915
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC TUE AUG 04 2009

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 0900 UTC.

...SPECIAL FEATURES...
TROPICAL STORM ENRIQUE AT 14.0N 115.7W MOVING WNW 15 KT. MINIMUM 
PRES 1004 MB WITH MAXIMUM SUSTAINED WINDS 35 KT WITH GUSTS TO 45 
KT. LARGE AREA OF NUMEROUS STRONG CONVECTION IN CLUSTERS FROM 
10N-15N BETWEEN 114W-119W. LATEST NHC ADVISORY CONTINUES ENRIQUE 
ON A WNW TRACK...REMAINING A TROPICAL STORM. SEE LATEST NHC 
FORECAST/ADVISORY UNDER AWIPS/WMO HEADERS MIATCMEP2/WTPZ22 KNHC 
FOR MORE DETAILS.

TROPICAL DEPRESSION EIGHT-E AT 12.3N123.9W MOVING WNW 11 KT.  
CENTRAL PRES 1006 MB WITH MAXIMUM SUSTAINED WINDS 30 KT GUST TO 
40 KT. THE DEPRESSION IS EXPECTED TO BECOME TROPICAL STORM 
WITHIN 12 HRS  AND CONTINUE ON A WNW TRACK AS A TROPICAL STORM.  
NUMEROUS MODERATE TO STRONG CONVECTION WITHIN 180 NM SW 
SEMICIRCLE. SEE LATEST NHC FORECAST/ADVISORY UNDER AWIPS/WMO 
HEADERS MIATCMEP3/WTPZ23 KNHC FOR MORE DETAILS.

...TROPICAL WAVES...
TROPICAL WAVE FROM 5N-16N ALONG 102W MOVING W 15 KT.  CONVECTION 
NEAR THE WAVE IS MAINLY ASSOCIATED WITH THE ITCZ AND UPPER LEVEL 
DIFFLUENT FLOW.

...ITCZ...
AXIS ALONG 6N78W 7N95W 10N110W 7N140W. SCATTERED STRONG 
CONVECTION WITHIN 90 NM N OF AXIS FROM 78W-85W. SCATTERED 
MODERATE TO STRONG CONVECTION WITHIN 150 NM N OF AXIS FROM
90W-97W AND WITHIN 150 NM S OF AXIS FROM 94W-102W. SCATTERED 
MODERATE ISOLATED STRONG CONVECTION WITHIN 150 NM EITHER SIDE OF 
AXIS FROM 104W-111W.

...DISCUSSION...
AN UPPER LEVEL TROUGH EXTENDS FROM A CYCLONIC CIRCULATION N OF 
THE AREA TO 32N133W 23N135W. NO SIGNIFICANT WEATHER ASSOCIATED 
WITH THE TROUGH. A 75-90 KT JETSTREAM IS E OF THE TROUGH AXIS 
FROM 28N129W TO BEYOND 32N124W. SE OF THE TROUGH IS AN UPPER 
LEVEL ANTICYCLONIC CIRCULATION CENTERED NEAR 21N120W. UPPER 
LEVEL MOISTURE IS MOVING NE IN THE SW FLOW BETWEEN THE 
ANTICYCLONIC CIRCULATION AND THE TROUGH.
 
AN UPPER LEVEL CYCLONIC CIRCULATION IN THE DEEP TROPICS IS 
CENTERED NEAR 14N134W. UPPER LEVEL DIFFLUENT S OF THE 
ANTICYCLONIC CIRCULATION AND E OF CYCLONIC CIRCULATION IS AIDING 
THE OUTFLOW FOR TROPICAL STORM ENRIQUE AND TROPICAL DEPRESSION 
8-E.

A LARGE UPPER LEVEL ANTICYCLONIC CIRCULATION IS OVER NORTHERN 
MEXICO NEAR NEAR THE BIG BEND OF TEXAS. CLUSTERS TO TSTMS ARE 
OVER NORTHERN MEXICO ARE SLOWLY DISSIPATING. AN UPPER LEVEL 
CYCLONIC CIRCULATION OFF THE S COAST OF MEXICO NEAR 14N100W. 
DIFFLUENCE ALOFT S OF THE CYCLONIC CIRCULATION IS ENHANCING
CONVECTION ALONG THE ITCZ. UPPER LEVEL ANTICYCLONIC CIRCULATION
ALONG THE N COAST OF COLOMBIA WITH RIDGE ACROSS PANAMA TO
9N93W.

SURFACE RIDGE WITH AXIS FROM 32N140W TO 25N115W. BROKEN TO 
OVERCAST STRATOCUMULUS CLOUDS BLANKET THE AREA N OF 20N W OF 
115W.

$$
DGS