DISPATCHER ATTEMPTS TO RELEASE AN ACFT FLT CREW TO THEIR DEST WITHOUT PROPER WX.

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THE PIC CONTACTED ME BY PHONE FROM THE DEP STATION TO ALERT ME TO THE FACT THAT HIS RELEASE PACKAGE CONTAINED NO WX. USUALLY WHEN THIS HAPPENS; IT IS A SIMPLE MATTER OF EITHER RE-XMITTING THAT PORTION OF THE PACKAGE; OR PULLING UP THE WX AND READING IT TO THE CREW. HOWEVER; WHEN I ATTEMPTED TO DO THIS; I DISCOVERED THE FORECAST HAD BEEN DROPPED AND THE ONE AND ONLY METAR WAS SEVERAL HRS OLD. WHEN I TRIED CALLING OUR OPS; I GOT AN ANSWERING MACHINE. I TRIED SENDING A MESSAGE VIA OUR INTERNAL NETWORK; AND I ALSO TRIED DIALING UP ASOS IN ZZZ VIA LANDLINE. AS I WAS DOING THESE THINGS; A MORE EXPERIENCED DISPATCHER; A DISPATCH SUPVR; AND THE DUTY MGR; COLLECTIVELY BEGAN POINTING OUT VARIOUS OVERSIGHTS I HAD COMMITTED AND THE APPARENT CAUSES: I HAD MISSED THAT THE ASOS WAS NOTAMED OTS. IT FOLLOWED THAT WHEN THE NWS NO LONGER HAD A MINIMUM SEQUENCE OF RPTS; IT WOULD DROP THE FORECAST. I HAD RELEASED A FLT TO AN ARPT FOR WHICH THE 'LATEST AVAILABLE' WX WAS ALMOST 8 HRS OLD! WORKING TOGETHER; WE WERE ABLE TO CONTACT A WX-QUALIFIED INDIVIDUAL IN ZZZ. SHE RPTED THE WX AS 'GOOD;' AND AGREED TO TAKE A SET OF OBSERVATIONS AND ENTER THE RESULTING DATA INTO OUR NETWORK; AS WELL AS CALL IT IN TO FSS AND THE NWS. MEANWHILE; WE GOT THE PIC TO AGREE TO PROCEED WITH THE FLT; PROVIDED THE RPTED WX WAS ABOVE MINIMUMS AND THAT HE HAD THE CONCURRENCE OF THE CHIEF PLT ON DUTY. GND PERSONNEL IN ZZZ WOULD ALSO SUPPLY AT LEAST A SECOND SET OF OBSERVATIONS PRIOR TO THE FLT'S ARR THERE.