SIGMET INFO DISSEMINATION PROB RELATED TO A LACK OF COORD BTWN AIRLINE WX DEPT AND DISPATCH OFFICE. DISPATCHER ENCOUNTERS DIFFICULTY IN FINDING INFO AFTER A B767-300 FLT CREW REQUESTS SIGMET RELATED INFO AS RELATED TO THAT AREA AS ALERTED BY OCEANIC CTL AT CZQX; NF.

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FLT X CONTACTED DISPATCH VIA SATCOM AS THEY WERE APCHING 45 DEGS N/50 DEGS W. THE FLT HAD RECEIVED INFO OF A CONVECTIVE SIGMET FROM GANDER OCEANIC AND THEY WANTED MORE INFO CONCERNING THE TSTM ACTIVITY. THE SATELLITE IMAGE OF THE NORTHERN ATLANTIC SHOWED A SMALL AREA OF TSTMS AT 45 DEGS N/50 DEGS W AND THE HIGH LEVEL SIGNIFICANT WX PROGNOSTIC CHART HIGHLIGHTED AN AREA OF POSSIBLE EMBEDDED CUMULONIMBUS IN THE SAME LOCATION. I REMEMBERED THOUGH THAT A HURRICANE WAS IN THE TROPICAL ATLANTIC IN THE PREVIOUS 3 DAYS. THE SATELLITE IMAGE OF THE TSTMS DID APPEAR TO BE THE REMAINS OF THE EARLIER HURRICANE. I ADVISED THE CREW THAT THE SATELLITE IMAGE SHOWED TSTMS WITH TOPS BELOW 35000 FT. THE CREW SAID THAT THEIR WX RADAR SHOWED THE SAME; AND THEY BELIEVED THAT THEY COULD EASILY NAV AROUND THE WX. THE FLT CONTINUED TO JFK WITHOUT INCIDENT. WHEN THE CREW CONTACTED ME; I WAS UNAWARE OF ANY PROBS IN THE NORTHWESTERN ATLANTIC. I DID ASK THE CREW TO STANDBY FOR 2 MINS WHILE I REVIEWED INFO THAT WAS AVAILABLE TO ME. I TRIED TO PULL UP 'RF 8100T' NATIONAL BUT THE RF FILE WAS EMPTY. I LATER LEARNED THAT THE HURRICANE WAS DOWNGRADED TO A TROPICAL STORM. I'M USED TO OUR METEOROLOGISTS HAND DELIVERING FREQUENT UPDATES ON HURRICANES AND TROPICAL STORMS TO MY DESK. THE AIRLINE'S DEPT SVCS HAVE BEEN XFERRED TO A NEW SYS AND I AM STILL GETTING USED TO THE DIFFERENCES ON HOW MY DEPT RECEIVES WX INFO. THE CAPT CALLED ME WHEN THE FLT ARRIVED IN JFK. HE TOO WAS UNAWARE OF ANY PROBS IN THE NORTH ATLANTIC UNTIL GANDER OCEANIC INFORMED HIM OF A SIGMET. HE ALSO INFORMED ME THAT THE FLT CREW DEVIATED OFF COURSE WHILE THEY WERE TRYING TO GET MORE WX INFO. THE TROPICAL STORM DID NOT PRESENT A PROB FOR THE FLT BUT THE CAPT AND MYSELF WOULD HAVE BEEN MORE COMFORTABLE IF WE HAD THE LATEST INFO ON IT. I DO WANT TO NOTE THAT I STARTED MY SHIFT IN THE EARLY AM. AT THAT TIME; FLT WAS ALREADY ENRTE. I DO NOT KNOW WHAT WAS DISCUSSED WITH THE CREW IN THEIR PREDEP WX BRIEFING.