000
AXPZ20 KNHC 062156
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC FRI MAR 06 2009

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. 

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2100 UTC.

...ITCZ...

THE INTERTROPICAL CONVERGENCE ZONE IS ALONG THE LINE...04N77W TO 
04N90W TO 02N100W TO 02N130W TO 03N140W. SCATTERED MODERATE FROM 
03N TO 06N BETWEEN 85W AND 92W. 

...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. EXCEPT FOR THE CONVECTION MENTIONED IN THE 
ITCZ SECTION THE AREA 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 TO 25 KNOT NORTHEASTERLY GAP WINDS IN THE GULF OF TEHUANTEPEC 
REGION WILL DIMINISH TO 20 KT THIS EVENING THEN DIMINISH TO LESS 
THAN 20 KT SATURDAY.

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