000
AXPZ20 KNHC 182136
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC SUN MAY 18 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 
2100 UTC.

...TROPICAL WAVES...

A TROPICAL WAVE IS LOCATED ALONG 88W FROM 05N TO 10N AND IS 
MOVING W ABOUT 10 KT. THE LATEST VISIBLE SATELLITE IMAGERY 
INDICATES BROAD CYCLONIC TURNING WITHIN FIVE TO SIX DEGREES 
EITHER SIDE OF THE WAVE AXIS.

...ITCZ...

ITCZ AXIS IS ALONG 07N78W TO 08N90W TO 10N110W TO 10N120W TO 
04N140W. SCATTERED MODERATE ISOLATED STRONG CONVECTION IS 
LOCATED WITHIN 90 NM EITHER SIDE OF A 05N82W TO 10N89W 
LINE...WITHIN A 90 NM RADIUS OF 07N103W...AND WITHIN 60 NM 
EITHER SIDE OF A 06N135W TO 05N140W LINE. 

...DISCUSSION...

W OF 108W...
AN ELONGATED BUT WELL-DEFINED MIDDLE/UPPER LEVEL CYCLONIC 
CIRCULATION IS CENTERED NEAR 26N140W AND IS STATIONARY. CYCLONIC 
ROTATION IS LOCATED E OF THE CIRCULATION CENTER TO 130W AND W TO 
NEAR 148W. SATELLITE CLOUD DRIFT WINDS INDICATE STRONG WINDS 
ALOFT OVER THE EASTERN SIDE OF THE CIRCULATION MEASURING TO 60 
KT. FURTHER EAST A LARGE MIDDLE/UPPER LEVEL TROUGH COVERS MOST 
OF MEXICO AND THE PACIFIC N OF 16N E OF 122W. THE AXIS EXTENDS 
ROUGHLY THROUGH THE CENTRAL BAJA CALIFORNIA PENINSULA TO 
16N115W. WATER VAPOR IMAGERY INDICATES STRONG SUBSIDENCE IN 
ASSOCIATION WITH THIS FEATURE. A SMALL CYCLONIC CIRCULATION IS 
EMBEDDED WITHIN THE TROUGH NEAR 26N111W. AT THE SURFACE 
SOUTHERLY SWELLS TO 9 FEET...WITH 12 TO 13 SECOND PERIODS...ARE 
LOCATED S OF 12N W OF 100W.

E OF 108W...
OVER THE E PART OF THE DISCUSSION AREA LIGHT MOSTLY EASTERLY 
WINDS ALOFT ARE LOCATED E OF 108W. A SURFACE TROUGH IS LOCATED 
FROM 14N104W TO 08N107W. SCATTERED MODERATE ISOLATED STRONG 
CONVECTION IS LOCATED AT THE N END OF THE TROUGH. 

$$
CAB