000
AXPZ20 KNHC 210931
TWDEP 

TROPICAL WEATHER DISCUSSION     
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC SAT MAR 21 2009

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 
0900 UTC.

...ITCZ...

THE ITCZ AXIS LIES ALONG A LINE FROM 07N78W TO 02N100W TO 
03N120W TO 04N140W. NO SIGNIFICANT CONVECTION.

...DISCUSSION...

W OF 110W...
THE SOUTHERN PART OF A MIDDLE/UPPER LEVEL TROUGH COVERS THE AREA 
N OF 30N W OF 128W WITH THE AXIS THROUGH 32N136W TO 30N139W. THE 
TROUGH IS MOVING E 20 TO 25 KNOTS. AN ASSOCIATED COLD FRONT IS 
LOCATED THROUGH 32N133.5W TO BEYOND 30N140W. WATER VAPOR IMAGERY 
DEPICTS SOUTHWESTERLY FLOW ALOFT COVERING THE REST OF THE 
DISCUSSION AREA N OF 10N W OF 110W WITH SATELLITE DERIVED WINDS 
INDICATING SPEEDS AS HIGH AS 70 KNOTS. INFRARED SATELLITE 
IMAGERY SHOWS DENSE MIDDLE/UPPER LEVEL CLOUDS WITHIN THIS AREA W 
OF 135W AND GRADUALLY BECOMING THINNER FURTHER E. AN UPSTREAM 
MIDDLE/UPPER LEVEL CYCLONIC CIRCULATION IS LOCATED ABOUT 480 
NAUTICAL MILES E OF HAWAII...MOVING E ABOUT 15 KNOTS. AT THE 
SURFACE N TO NE WINDS 20 TO 25 KT ARE FORECAST IN THE AREA 
BOUNDED BY 26N140W TO 30N120W TO 15N120W TO 10N140W TO 26N140W 
IN 48 HOURS. NORTHERLY WINDS WILL ALSO INCREASE ALONG AND OFF 
THE BAJA CALIFORNIA COAST.

E OF 110W...
SOUTHWESTERLY WINDS ALOFT...WITH SPEEDS IN THE 50 TO 60 KNOT 
RANGE...ARE LOCATED OVER THE AREA S OF A LINE FROM HONDURAS TO 
05N110W AND WESTERLY OVER THE REST OF THE AREA E OF 110W. AT THE 
SURFACE A MINIMAL GALE IS LOCATED OVER THE GULF OF TEHUANTEPEC 
WITH SEAS 8 TO 12 FT. WINDS WILL DROP BELOW GALE FORCE IN 24 
HOURS.

$$

CAB