000
AXPZ20 KNHC 280919
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC THU FEB 28 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 ALONG 4N77W 4N100W 8N115W 3N140W. ISOLATED MODERATE 
NEAR 5N78W 3N87W 2N90W 4N98W 8N110W 9N130W AND 9N136W.  

...DISCUSSION...

A PAIR OF SHORTWAVE TROUGHS IN THE WESTERLIES ARE MOVING THROUGH 
THE REGION TONIGHT. ONE NEAR 26N119W AND THE OTHER NEAR 28N132W. 
BOTH MOVING ESE 15 KT. ON THE SURFACE TONIGHT THE PACIFIC RIDGE 
WAS ANCHORED WITH A 1026 MB HIGH NEAR 33N137W. THE RIDGE EXTENDS 
OVER THE AREA N OF 7N W OF 110W AND IS PRODUCING NE TRADES 20 TO 
25 KT S OF 20N W OF 130W WITH SEAS 9 TO 12 FT. WINDS ALONG THE 
BAJA COAST ARE LIGHT NWLY. GAP WINDS ARE MOSTLY LIGHT EXCEPT FOR 
TEHUANTEPEC WHERE A STORM WARNING IS IN AFFECT. QUIKSCAT IMAGERY 
SHOWS 45 KT. BOTH SSMI AND QUIKSCAT SHOW A SWATH OF STRONG N AND 
NE WINDS EXTENDING SSW TO NEAR 11N98W.    

LATER DAY 1 THE TWO SHORTWAVES WILL CONTINUE MOVING EWD WHILE 
MID LEVEL RIDGING BUILDS OVER THE NW CORNER OF THE AREA. ON THE 
SURFACE LATER DAY 1 WINDS ARE EXPECTED TO DROP TO GALE FORCE 
THROUGH TEHUANTEPEC AS HIGH PRES OVER THE GULF OF MEXICO MOVES 
EWD. GAP WINDS THROUGH PAPAGAYO INCREASE TO 20 KT AS HIGH PRES 
BUILDS OVER THE WRN CARIBBEAN. 

FOR DAY 2 THE FIRST SHORTWAVE TROUGH BEGINS TO WASH OUT AS IT 
MOVES E NEAR 109W AND MOVES INTO A MID LEVEL RIDGE OVER MEXICO. 
THE SECOND SHORTWAVE MOVES TO 120W WHILE THE MID LEVEL RIDGE 
OVER THE NW CORNER OF THE REGION CLOSES OFF WITH A CENTER NEAR 
24N135W. ON THE SURFACE DAY 2 THE PACIFIC RIDGE IS FORECAST TO 
WEAKEN SLIGHTLY WITH NE TRADES MOSTLY 20 KT S OF 20N W OF 130W. 
WINDS ALONG THE BAJA COAST REMAIN LIGHT NWLY. WINDS THROUGH 
TEHUANTEPEC DECREASE TO 15 TO 20 KT WHILE PAPAGAYO WINDS 
INCREASE TO 20 TO 25 KT. GULF OF PANAMA WINDS ALSO INCREASE TO 
20 KT. 

$$
RRG