000
AXPZ20 KNHC 060400
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC THU MAR 06 2008

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 
0315 UTC.
 
...ITCZ...
THE ITCZ AXIS IS ALONG 02N80W TO 04N86W TO 01N96W TO 07N116W TO 
LOW PRES 07N131W 1010 MB WITH AXIS TO 04N140W. SCATTERED 
MODERATE CONVECTION IS OBSERVED S OF 04N E OF 98W AND WITHIN 15 
NM OF 09.5N114.5W AND WITHIN 90 NM OF AN EMBEDDED LOW PRES 1012 
MB AT 06N131.5W.

...DISCUSSION...
AN UPPER ANTICYCLONE S OF THE EQUATOR HAS A RIDGE EXTENDING NE 
TO A GENTLE CREST ALONG 05N140W TO 00N129W. AN UPPER CYCLONE 
NEAR 16N143W HAS ITS ENVELOPE OF CYCLONIC FLOW EXTENDING E INTO 
THE AREA FROM 14N TO 22N W OF 138W. ANOTHER UPPER ANTICYCLONE IS 
AT 08N105W WITH A RIDGE NW TO A SHARP CREST AT 25N137W. DEBRIS 
MOISTURE FROM THE CONVECTION NEAR 09N131W IS ADVECTED N UNDER 
THIS RIDGE COVERING THE UPPER LEVELS FROM 08N TO 25N BETWEEN 
121W AND 140W. 

A SERIES OF UPPER ANTICYCLONES CONTINUE TO DOMINATE THE DEEP 
TROPICS E OF 100W RESULTING IN A BROAD RIDGE OVER THE AREA 
CRESTING ALONG POINTS 20N89W TO 24N79W TO 25N78W. UPPER 
DIFFLUENCE ALONG THIS TROPICAL RIDGE IS ENHANCING ITCZ 
CONVECTION E OF 95W AND OTHER CONVECTION OVER S AMERICA. THE 
RESULTANT DEBRIS MOISTURE IS SPREADING NE OVER THE S CENTRAL 
CARIBBEAN.

THE N CENTRAL PORTION OF THE DISCUSSION AREA IS DOMINATED BY A 
SECONDARY UPPER TROUGH THAT HAS SWUNG SE REINFORCING AN INITIAL 
BROAD UPPER TROUGH. THE SECOND IS AXIS ALONG 32N111W 23N114W. 
DRY UPPER AIR IS NOTED WITHIN 120 NM EITHER SIDE OF LINE 27N88W 
TO 24N110W TO 27N131W TO 26N140W. 

A SURFACE HIGH PRES IS NEAR 32N134W WITH A RIDGE EXTENDING SE TO 
NEAR 13N101W.
 
GULF OF CALIFORNIA N WINDS WILL INCREASE AGAIN TO 20 TO 30 KT 
THU MORNING THROUGH FRI. 

$$
NELSON