000
AXPZ20 KNHC 100951
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC FRI MAY 09 2008

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. 

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC.

...ITCZ...
INTERTROPICAL CONVERGENCE ZONE ALONG  07N78W  05N97W  06N110W 
04N123W  05N132W  04N140W. SCATTERED MODERATE TO STRONG 
CONVECTION WITHIN 180 NM OF 07N111W AND WITHIN 120 NM S OF AXIS 
FROM 88W-96W.

...DISCUSSION...
UPPER LEVEL VORTEX AT 26N132W WITH AXIS FROM 32N125W TO 
23N140W.  STRONG SUBSIDENCE MAINTAINS DRY AIR MASS W OF LINE 
FROM 32N107W TO 19N130W TO 18N140W.  SW WINDS ALOFT ON SE 
PERIPHERY OF VORTEX ADVECTING ABUNDANT TROPICAL MOISTURE DEBRIS 
FROM LOW PRES 1008 MB NEAR 06N113W TOWARDS SRN HALF OF BAJA 
CALIFORNIA.  HEALTHY MID/UPPER LEVEL ANTICYCLONIC CIRCULATION 
OVER LOW PRES ENHANCING ITS DEEP CONVECTION.

SECOND ANTICYCLONE OVER SWRN GULF OF MEXICO MAINTAINS MOISTURE 
SWATH OVER NRN HALVES OF MEXICO AND GULF OF MEXICO.  IT ALSO 
KEEPS MODERATE OUTFLOW FROM CONVECTION NEAR SECOND LOW PRES 1005 
MB AT 09N86W NEAR COAST OF COSTA RICA.  ELSEWHERE BETWEEN TWO 
CENTERS OF CONVECTION...MODERATE TO STRONG SUBSIDENCE FROM 
ANTICYCLONE KEEPS AIR MASS FAIRLY DRY.  

OTHERWISE AT THE SURFACE...
WEAKENING HIGH PRES 1031 MB AT 33N142W MAINTAINS FRESH TRADES 
N OF 08N W OF 130W...BUT DIMINISH WITHIN 2 HRS BELOW 20 KT.   
SURFACE RIDGE EXTEND TO 15N110W AND KEEPS FRESH NLY BREEZE ALONG 
COAST OF CALIFORNIA FOR NEXT 24 HRS. LATEST RUN ON NWW3 WIPE OUT 
LINGERING SWELLS WITHIN 24 HRS.

$$
WALLY BARNES