000
AXPZ20 KNHC 070305
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC SAT MAR 07 2009

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.

...ITCZ...

THE INTERTROPICAL CONVERGENCE ZONE IS ALONG THE LINE...04N77W TO 
04N95W TO 02N110W TO 04N130W TO 04N140W. NO SIGNIFICANT 
CONVECTION ALONG THE AXIS.

...DISCUSSION...

UPPER LEVEL TROUGH IS OVER THE NORTHERN PART OF THE AREA WITH 
AXIS FROM SOUTHERN CALIFORNIA AT 33N118W TO 30N130W TO BEYOND 
30N140W. SOUTH OF THE TROUGH AXIS 90 TO 110 KT UPPER LEVEL 
JETSTREAM WITH WESTERLY FLOW IS NOTED. LITTLE WEATHER IS 
ASSOCIATED WITH THIS TROUGH HOWEVER A PLUME OF MIDDLE AND UPPER 
LEVEL MOISTURE WITH BROKEN TO OVERCAST HIGH LEVEL CLOUDS IS FROM 
20N TO 27N BETWEEN 110W AND 140W. THIS MOISTURE IS ADVECTING 
NORTHEASTWARD ACROSS THE PACIFIC TO BAJA CALIFORNIA AND 
NORTHWESTERN MEXICO. A BROAD UPPER LEVEL RIDGE IS FROM 10N TO 
25N BETWEEN 97W AND 115W. THE REMAINDER OF THE AREA HAS ZONAL 
UPPER LEVEL FLOW. SOUTHEAST OF A LINE FROM 30N95W TO 20N105W TO 
10N120W TO 00N127W IS DRY AND CLOUD FREE IN THE MIDDLE AND UPPER 
LEVELS. 

ON THE SURFACE...MODERATE RIDGE IS NORTHWEST OF A LINE FROM 
SOUTHERN BAJA CALIFORNIA TO NEAR 15N140W. THIS FEATURE IS 
FORECAST TO STRENGTHEN SOME IN THE NEXT COUPLE OF DAYS. 
ELSEWHERE A BROAD TROUGH IS ANALYZED E OF 140W.

20 KNOT NORTHEASTERLY GAP WINDS IN THE GULF OF TEHUANTEPEC 
REGION WILL DIMINISH TO LESS THAN 20 KT SUNDAY.

20 TO 30 KNOT NORTHEASTERLY GAP WINDS IN AND WELL DOWNSTREAM 
FROM THE GULF OF PAPAGAYO WILL CONTINUE FOR THE NEXT SEVERAL 
DAYS.

20 KT NORTHERLY GAP WINDS IN AND SOUTHWEST OF THE GULF OF PANAMA 
REGION WILL GRADUALLY DIMINISH IN AREA THEN DIMINISH TO LESS 
THAN 20 KNOTS SATURDAY NIGHT.

$$
FORMOSA