000
AXPZ20 KNHC 231556
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC MON SEP 22 2008

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.

...TROPICAL WAVES...

A TROPICAL WAVE IS ALONG 84W SOUTH OF 18N MOVING WEST 15 KT. 
SCATTERED STRONG SHOWERS AND THUNDERSTORMS FROM 5N TO 7N
BETWEEN 82W AND 86W.

A TROPICAL WAVE IS ALONG 95W SOUTH OF 18N FROM THE ISTHMUS
OF TEHUANTEPEC INTO THE EASTERN PACIFIC OCEAN...MOVING WEST
10 TO 15 KT. SCATTERED STRONG SHOWERS AND THUNDERSTORMS ARE
FROM 11N TO 15N BETWEEN 89W AND 100W. ISOLATED MODERATE SHOWERS
WITHIN 15 NM ON EITHER SIDE OF 10N BETWEEN 94W AND 100W.

...ITCZ...

10N86W 10N93W 09N110W 10N120W 07N133W 08N140W. ISOLATED MODERATE
SHOWERS FROM 02N TO 07N EAST OF 81W...AND ELSEWHERE FROM 06N TO
12N BETWEEN 107W AND 140W.

...DISCUSSION...

A 1008 MB LOW PRESSURE CENTER IS NEAR 17N108W. SCATTERED TO
NUMEROUS STRONG SHOWERS AND THUNDERSTORMS ARE WITHIN 30 NM
ON EITHER SIDE OF 17N110W 18N109W 19N108W 20N107W.

A 1011 MB LOW PRESSURE CENTER IS NEAR 10N122W. SCATTERED
MODERATE SHOWERS TO ISOLATED STRONG THUNDERSTORMS FROM
9N TO 10N BETWEEN 121W AND 124W. ISOLATED MODERATE SHOWERS
ARE WITHIN 15 NM ON EITHER SIDE OF 11N127W 12N126 12N125W.

BROAD UPPER LEVEL ANTICYCLONIC FLOW COVERS THE AREA NORTH
OF 15N BETWEEN 94W IN THE GULF OF TEHUANTEPEC AND 110W.

AN UPPER LEVEL RIDGE IS NORTH OF THE AREA BETWEEN
CALIFORNIA AND 140W.

A CUT-OFF MIDDLE TO UPPER LEVEL CYCLONIC CIRCULATION CENTER
IS NEAR 26N122W. THIS CYCLONIC CENTER IS SURROUNDED BY MIDDLE
TO UPPER LEVEL DRY AIR IN SUBSIDENCE...THAT IS NORTH AND 
NORTHWEST OF 24N107W 12N117W 13N140W.

A MIDDLE TO UPPER LEVEL TROUGH EXTENDS FROM A SMALL 28N110W
CYCLONIC CIRCULATION CENTER IN MEXICO TO BAJA CALIFORNIA
NEAR 26N112W TO 22N113W TO 18N117W.

AN EAST-TO-WEST UPPER LEVEL RIDGE PASSES THROUGH 22N140W 
TO 22N126W.

$$
MT