000
WTNT43 KNHC 230848
TCDAT3
TROPICAL STORM CRISTOBAL DISCUSSION NUMBER  18
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL   AL032008
500 AM EDT WED JUL 23 2008
 
ALL OF THE DEEP CONVECTION NEAR THE CENTER OF CIRCULATION HAS
DISSIPATED AND CRISTOBAL NO LONGER HAS THE APPEARANCE OF A TROPICAL
CYCLONE.  THE FLORIDA STATE UNIVERSITY PHASE SPACE DIAGRAMS USING
GLOBAL MODEL OUTPUT ALSO SUGGEST THAT CRISTOBAL HAS TRANSITIONED
INTO AN ASYMMETRIC COLD CORE LOW...I.E. AN EXTRATROPICAL CYCLONE.
WITH THAT...CRISTOBAL IS DECLARED EXTRATROPICAL AND THIS WILL BE
THE LAST ADVISORY ON THIS SYSTEM ISSUED BY THE NATIONAL HURRICANE
CENTER.  ADDITIONAL INFORMATION ON CRISTOBAL CAN BE FOUND IN HIGH
SEAS FORECASTS ISSUED BY THE NATIONAL WEATHER SERVICE...UNDER AWIPS
HEADER NFDHSFAT1 AND WMO HEADER FZNT01 KWBC.
 
THE DEGRADATION OF THE SATELLITE APPEARANCE SUGGEST CRISTOBAL HAS
WEAKENED SO THE INITIAL INTENSITY IS SET AT 40 KT.  SINCE DYNAMICAL
MODELS INDICATE A LACK OF BAROCLINIC FORCING...CONTINUED WEAKENING
IS EXPECTED DURING THE NEXT DAY OR SO PRIOR TO CRISTOBAL MERGING
WITH OR BEING ABSORBED BY A FRONTAL SYSTEM OVER THE NORTH ATLANTIC.
  
FORECAST POSITIONS AND MAX WINDS
 
INITIAL      23/0900Z 44.7N  55.9W    40 KT...EXTRATROPICAL
 12HR VT     23/1800Z 45.3N  51.0W    35 KT...EXTRATROPICAL
 24HR VT     24/0600Z 44.4N  44.8W    35 KT...EXTRATROPICAL
 36HR VT     24/1800Z 42.6N  38.7W    30 KT...EXTRATROPICAL
 48HR VT     25/0600Z...ABSORBED
 
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FORECASTER RHOME