000
AXPZ20 KNHC 232148
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC MON SEP 22 2008

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 2130 UTC.

...TROPICAL WAVES...

A TROPICAL WAVE IS ALONG 85W/86W SOUTH OF 18N MOVING WEST 15 KT. 
UPPER LEVEL NORTHEASTERLY WIND FLOW HAS SHEARED THE CLOUD TOPS 
IN THE AREA FROM 04N TO 09N BETWEEN 82W AND 87W. STRONG SHOWERS
AND THUNDERSTORMS ARE IN PANAMA BETWEEN 80W AND THE COSTA RICA
BORDER JUST SOUTH OF THE ITCZ.

A TROPICAL WAVE IS ALONG 95W/96W SOUTH OF 18N FROM THE WESTERN
ISTHMUS OF TEHUANTEPEC INTO THE EASTERN PACIFIC OCEAN...MOVING 
WEST 10 TO 15 KT. UPPER LEVEL NORTHEASTERLY WIND FLOW CUTS 
ACROSS THE AREA NORTH OF 06N EAST OF 110W...SHEARING THE CLOUD 
TOPS FROM 10N TO 12N BETWEEN 90W AND 105W. STRONG SHOWERS AND
THUNDERSTORMS ARE IN INDIVIDUAL CLUSTERS FROM 13N TO 15N
BETWEEN 90W AND 100W.

...ITCZ...

10N87W 12N96W 10N102W 11N110W 10N122W 08N140W. SCATTERED
MODERATE SHOWERS TO ISOLATED STRONG THUNDERSTORMS ARE
FROM 7N TO 9N BETWEEN 138W AND 140W.

...DISCUSSION...

A 1008 MB LOW PRESSURE CENTER IS NEAR 16N108W. SCATTERED
MODERATE SHOWERS TO ISOLATED STRONG THUNDERSTORMS ARE WITHIN
60 NM ON EITHER SIDE OF 16N111W 18N110W 22N108W.

A 1011 MB LOW PRESSURE CENTER IS NEAR 10N122W. ISOLATED
MODERATE SHOWERS WITHIN A 15 NM RADIUS OF 10N123W...AND
FROM 10N TO 12N BETWEEN 125W AND 127W.

BROAD UPPER LEVEL ANTICYCLONIC FLOW COVERS THE AREA
NORTH OF THE EQUATOR 15N EAST OF 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 26N123W. THIS CYCLONIC CENTER IS SURROUNDED BY MIDDLE
TO UPPER LEVEL DRY AIR IN SUBSIDENCE...THAT IS NORTH AND 
NORTHWEST OF 24N108W 14N120W 13N140W.

A SECOND MIDDLE TO UPPER LEVEL CYCLONIC CIRCULATION CENTER IS 
NEAR 25N131W.

A MIDDLE TO UPPER LEVEL TROUGH EXTENDS FROM A SMALL 28N110W
CYCLONIC CIRCULATION CENTER IN MEXICO TO BAJA CALIFORNIA
NEAR 26N112W TO 22N114W TO 18N117W.

AN EAST-TO-WEST UPPER LEVEL RIDGE PASSES THROUGH
20N140W TO 20N123W.

$$
MT