000
AXPZ20 KNHC 091603
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC WED SEP 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 1530 UTC.

...SPECIAL FEATURE...

THE CENTER OF TROPICAL STORM LINDA AT 09/1500 UTC IS NEAR
16.5N 128.7W...OR ABOUT 1300 MILES/2090 KM TO THE WEST-SOUTHWEST 
OF THE SOUTHERN TIP OF BAJA CALIFORNIA. LINDA IS MOVING 
NORTHWEST 7 KT. THE MAXIMUM SUSTAINED WIND SPEEDS ARE 55 KT
WITH GUSTS TO 65 KT. THE ESTIMATED MINIMUM CENTRAL PRESSURE
IS 994 MB. PLEASE READ THE LATEST NHC FORECAST/ADVISORY UNDER 
AWIPS/WMO HEADERS MIATCMEP5/WTPZ25 KNHC AND THE PUBLIC ADVISORY 
UNDER TCPEP5/WTPZ35 KNHC FOR MORE DETAILS. TROPICAL STORM FORCE 
WINDS EXTEND OUTWARD UP TO 70 MILES/110 KM FROM THE CENTER.
STRONG SHOWERS AND THUNDERSTORMS ARE FROM 16N TO 17N BETWEEN 
128W AND 130W.

...TROPICAL WAVE...

A TROPICAL WAVE IS ALONG 85W/86W TO THE SOUTH OF 19N MOVING
WEST 10 TO 15 KT. NO DEEP CONVECTIVE PRECIPITATION JUST IS 
ASSOCIATED WITH THIS WAVE.

...THE ITCZ...

7N77W 08N90W 10N100W 10N120W 13N124W...12N131W 10N140W. STRONG 
SHOWERS AND THUNDERSTORMS ARE WITHIN 120 NM ON EITHER SIDE OF 
THE AXIS TO THE EAST OF THE TROPICAL WAVE ALONG 85W/86W...FROM 
THE ITCZ TO 13N BETWEEN 103W AND 106W...AND FROM 08N TO 10N 
BETWEEN 123W AND 125W. ISOLATED MODERATE SHOWERS TO LOCALLY 
STRONG THUNDERSTORMS ELSEWHERE WITHIN 240 NM ON EITHER SIDE
OF THE REST OF THE ITCZ.

...DISCUSSION...

A MIDDLE LEVEL TO UPPER LEVEL TROUGH PASSES THROUGH 32N127W TO
26N130W TO 23N133W TO 18N140W. NO DEEP CONVECTIVE PRECIPITATION 
ACCOMPANIES THIS TROUGH.

A MIDDLE LEVEL TO UPPER LEVEL INVERTED TROUGH IS ALONG 98W/99W
TO THE SOUTH OF 15N. THIS TROUGH SPANS THE ITCZ...AND IT IS
POSSIBLE THAT ITS PRESENCE IS ENHANCING SOME OF THE ITCZ 
PRECIPITATION.

SCATTERED MODERATE TO STRONG SHOWERS IN AN AREA OF A FEW CELLS 
FROM 12N TO 15N BETWEEN 92W AND 94W...AND FROM 16N TO 17N 
BETWEEN 104W AND 106W...POSSIBLY ENHANCED BY UPPER LEVEL 
DIFFLUENT FLOW ESPECIALLY FOR THE PRECIPITATION THAT IS BETWEEN 
92W AND 94W.

$$
MT