000
AXPZ20 KNHC 100857
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC MON MAR 10 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 
0845 UTC.

...ITCZ...

ITCZ AXIS IS ALONG THE LINE...5N77W 2N100W 7N115W 6N140W. 
SCATTERED MODERATE ISOLATED STRONG WITHIN 120-150 NM S OF THE 
AXIS BETWEEN 120W AND 123W...AND WITHIN 90 NM S OF THE AXIS 
BETWEEN 129W AND 132W. 

SCATTERED MODERATE WITHIN 60 NM OF LINE 14N105.5W 12.5N113W. 

...DISCUSSION...
UPPER LEVELS...
THERE ARE TWO DEEP LAYER TROUGHS WITHIN THE AREA. THE FIRST 
TROUGH EXTENDS FROM A CYCLONIC CIRCULATION OVER W TEXAS
TO 20N110W AND WAS SWINGING ACROSS NRN MEXICO. SOME UPPER LEVEL 
SUBSIDENCE WAS WRAPPING AROUND THE W SIDE OF THE TROUGH. 
THE OTHER TROUGH IS NORTH OF 16N WEST OF 135W WITH A DEVELOPING
CYCLONIC CIRCULATION AT THE BASE OF THE TROUGH NEAR 20N137W.  
THIS TROUGH IS FORECAST TO DRIFT SOUTH AND WEAKEN SLIGHTLY.

A FLAT RIDGE EXISTED BETWEEN THE TWO TROUGHS WITH AN AXIS ALONG 
120W EXTENDING NWD FROM THE DEEP TROPICS TO ALONG 25N. UPPER 
LEVEL WIND MAX OF 70-80 KT WAS ADVECTING MOSTLY HIGH LEVEL 
MOISTURE EWD THROUGH THE RIDGE AXIS. DIFFLUENT UPPER LEVEL FLOW 
ALONG THE SRN PERIPHERY OF THE RIDGE WAS ENHANCING CONVECTION 
ALONG THE ITCZ BETWEEN 120W AND 132W...AND IN THE VICINITY OF 
THE SURFACE TROUGH NOTED BELOW.  

SURFACE...
WEAK RIDGE IS NORTH OF 12N WEST OF 108W AND IS ANCHORED BY A 
1026 MB HIGH JUST NORTH OF THE AREA NEAR 31N129W. OTHERWISE A 
WEAK TROUGH WAS NOTED ALONG LINE 3N117W 11N114W AND WAS DRIFTING 
WEST. 

FRESH TRADE WIND FLOW OVER THE CARIBBEAN IS PROVOKING GAP WINDS 
THROUGH THE GULF OF PAPAGAYO AREA OF 20 KNOTS. THIS WILL 
CONTINUE THROUGH 48 HOURS. GAP WINDS OF 15-20 KNOTS NEAR THE 
GULF OF PANAMA ARE EXPECTED OVER THE NEXT 24 HOURS. 

$$
COBB