000
WTPZ42 KNHC 241458
TCDEP2
TROPICAL DEPRESSION ANDRES DISCUSSION NUMBER  12
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL   EP022009
800 AM PDT WED JUN 24 2009
 
THE CENTER OF ANDRES HAS BEEN EXTREMELY DIFFICULT TO FIND IN
CONVENTIONAL SATELLITE IMAGERY.  AN 0856 UTC AMSR-E MICROWAVE PASS
WAS VERY HELPFUL IN LOCATING THE CENTER...HOWEVER A TRMM PASS ABOUT
AN HOUR AND A HALF LATER SUGGESTED THAT THE CENTER WAS BECOMING
ELONGATED AT THAT TIME.  A MORE RECENT 1250 UTC QUIKSCAT PASS HAS
PROVIDED MORE EVIDENCE THAT THE CENTER IS BECOMING ELONGATED AND 
LESS-DEFINED.  THE HIGHEST BELIEVABLE WIND VECTOR FROM THE
SCATTEROMETER WAS AROUND 30 KT...WHICH IS USED AS THE INITIAL
INTENSITY ESTIMATE.

ANDRES IS FORECAST TO CONTINUE WEAKENING...DUE TO NORTHEASTERLY
SHEAR AND A MORE STABLE AIRMASS. SINCE THE CENTER OF THE CYCLONE IS
BECOMING LESS DEFINED...DISSIPATION IS NOW EXPECTED LATER TODAY AND
ANDRES SHOULD CONTINUE MOVING NORTHWESTWARD UNTIL THAT OCCURS.
  
FORECAST POSITIONS AND MAX WINDS
 
INITIAL      24/1500Z 20.3N 107.7W    30 KT
 12HR VT     25/0000Z 21.0N 108.8W    25 KT...REMNANT LOW
 24HR VT     25/1200Z...DISSIPATED
 
$$
FORECASTER BROWN