000
AXPZ20 KNHC 310244
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC THU MAY 31 2007

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

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0300 UTC.

...SPECIAL FEATURES...

 ...TROPICAL STORM WARNING...
.TROPICAL STORM BARBARA NEAR 13.0N 96.9W 1003 MB AT 0300 UTC MAY
31 MOVING SSE OR 165 DEG AT 4 KT. MAXIMUM SUSTAINED WINDS 40 KT 
GUSTS 50 KT. 

TROPICAL DEPRESSION ALVIN NEAR 13.2N 115.2W 1005 MB AT 0300 UTC 
MAY 31 MOVING W OR 270 DEG AT 3 KT. MAXIMUM SUSTAINED WINDS 30 
KT GUSTS 40 KT.  

...ITCZ...
ITCZ AXIS ALONG 7N78W 7N86W 10N90W 8N120W 
6N140W. SCATTERED MODERATE/ISOLATED STRONG 90 NM WIDE 77W TO 80W.
SCATTERED MODERATE TO STRONG 120 NM WIDE 99W TO 104W.  

...DISCUSSION...
UPPER LEVELS..

DEEP LAYER  TROUGH 32N135W TO 20N140W BRINGS 95 KT JET 
CORE INTO NW CORNER OF E PAC ALONG WITH ABUNDANT MOISTURE WHICH 
RACES ALONG ON W SIDE OF DOWNSTREAM RIDGE INTO SRN BAJA 
CALIFORNIA PENINSULA.  RIDGE ALOFT EXTEND N FROM CIRCULATION 
ALONG 116W ACROSS BAJA PENINSULA INTO SW U.S. DRY AIR MASS UNDER 
RIDGE FROM 16N-23N E OF 125W.  

LOW LEVELS...
BROAD RIDGE WITH CENTEWR N OF AREA KEEPS NE TRADES ACROSS 
THROUGH REST OF THE REGION.     

$$
WALLY BARNES