000
AXPZ20 KNHC 080837
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC TUE MAY 08 2007

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS 
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND 
METEOROLOGICAL ANALYSIS.

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0830 UTC.

...ITCZ...
INTERTROPICAL CONVERGENCE ZONE IS ALONG THE LINE...8N78W 9N100W 
13N118W 9N130W 7N140W. SCATTERED MODERATE WITHIN 120-180 NM OF 
THE AXIS BETWEEN 101W AND 115W...AND WITHIN 90 NM OF THE AXIS W 
OF 130W. 

...DISCUSSION...
VERY SHARP QUASI-STATIONARY DEEP LAYERED TROUGH OVER THE SW 
CONUS EXTENDS SWD THROUGH A WELL DEFINED CYCLONIC CIRCULATION 
OVER SE ARIZONA SWWD TO 26N120W. DIFLUENT SWLY FLOW IN THE UPPER 
LEVELS E OF THE TROUGH WAS ENHANCING CONVECTION ALONG THE RIO 
GRANDE RIVER OF TEXAS AND NE MEXICO. ADDITIONAL CONVECTION WAS 
IN THE VICINITY OF THE CYCLONIC CIRCULATION OVER NEW MEXICO.  
A BROAD TROUGH WAS NOTED ELSEWHERE NW OF A LINE FROM 25N120W TO 
10N140W AND WAS MARKED BY A LARGE AREA OF UPPER LEVEL 
SUBSIDENCE/DRY AIR ALOFT.  

E-W ORIENTED ANTICYCLONIC CIRCULATION WITH MEAN CENTER NEAR 
12N100W DOMINATED THE FLOW OVER MEXICO S OF 23N AND THE TROPICAL 
PACIFIC E OF 120W. AXIS OF SUBTROPICAL JTST AROUND THE PERIPHERY 
OF THE ANTICYCLONE AND SE OF THE BROAD UPPER TROUGH NOTED ABOVE 
EXTENDED FROM 9N140W NEWD THROUGH 19N125W SRN BAJA CALIFORNIA 
INTO MEXICO. SATELLITE DERIVED WINDS INDICATED CORE SPEEDS OF
80-100 KT. JTST WAS ADVECTING COPIOUS AMOUNTS OF UPPER LEVEL 
TROPICAL MOISTURE FROM THE ITCZ NEWD ACROSS SRN BAJA CALIFORNIA 
AND MEXICO.

AT THE SURFACE A WEAKENING RIDGE IS NORTH OF 15N AND WEST OF 
110W WITH 20 KT TRADE WINDS CONFINED TO A SMALL AREA FROM 9N TO 
16N WEST OF 132W. ELSEWHERE...A WEAK TROUGH WAS INDICATED ALONG 
THE ITCZ FROM 6N124W NEWD TO NEAR 15N120W. 

$$
COBB