000
AXPZ20 KNHC 312141
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC SUN MAY 31 2009

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.

...ITCZ...

AXIS ALONG 07N77W TO 11N95W AND THEN FROM 07N103W TO 05N120W TO 
09N134W TO 06N140W. SCATTERED MODERATE ISOLATED STRONG 
CONVECTION IS LOCATED FROM 04N TO 08N E OF 81W...WITHIN A 60 NM 
RADIUS OF 08N88W...AND WITHIN 60 NM EITHER SIDE OF A LINE FROM 
05N130W TO 08N133W TO 07N137W.

...DISCUSSION...

W OF 120W...
A LARGE MIDDLE/UPPER LEVEL CYCLONIC CIRCULATION IS POSITIONED N 
OF THE DISCUSSION AREA NEAR 39N135W AND IS MOVING E ABOUT 10 KT. 
A TROUGH AXIS EXTENDS SOUTHWARDS FROM THE CIRCULATION TO NEAR 
25N136W WITH CYCLONIC FLOW E OF THE AXIS TO 124W AND W OF THE 
AXIS BEYOND 140W. THE STRONGEST WINDS ASSOCIATED WITH THE TROUGH 
ARE LOCATED E OF THE AXIS WITH SATELLITE CLOUD DRIFT WINDS 
INDICATING SPEEDS OF 45 TO 55 KT. SURFACE REFLECTION IS 
INDICATED BY A COLD FRONT THAT IS LOCATED THROUGH 32N128W TO 
25N137W AND THEN CONTINUES AS A STATIONARY FRONT TO BEYOND 
24N140W. THE FRONT IS WEAK AND MINIMAL CONVECTION IS ASSOCIATED 
WITH IT. A STATIONARY 1019 MB HIGH CENTER IS LOCATED E OF THE 
FRONT NEAR 28N127W. WEST SOUTHWESTERLY FLOW ALOFT COVERS A LARGE 
AREA FROM NEAR 10N TO 24N W OF 120W. AN UPPER LEVEL CYCLONIC 
CYCLONIC CIRCULATION IS FORECAST TO MOVE E TO NEAR 17N137W IN 48 
HOURS. NORTHWEST WINDS TO 20 KT ARE LOCATED ALONG AND UP TO 180 
NM OFF OF THE BAJA CALIFORNIA COAST.

E OF 120W...
WINDS ALOFT ARE MOSTLY WESTERLY N OF 10N BETWEEN 105W AND 
120W...LIGHT AND VARIABLE BETWEEN 88W AND 105W...AND NORTHERLY E 
OF 88W. AT THE SURFACE A TROUGH EXTENDS FROM 12N96W TO A LOW 
07N100W 1010 MB TO 05N101W...DRIFTING W. WITHIN 360 NM E OF 
TROUGH SE TO S WINDS ARE 20 KT AND WITHIN 360 NM W OF TROUGH NE 
WINDS ARE 20 KT.

$$
CAB