MD80 CREW DID NOT HAVE CORRECT TKOF PERFORMANCE INFO FOR DEP AT MSY WITH 2740 FT OF RWY CLOSED.

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DEPARTING WITHOUT TEMPORARY AIRMAN ADVISORY. ARPT WAS DEPARTING RWY 28. ATIS INDICATED W 2745 FT OF RWY 10/28 WAS CLOSED. FIELD RPT ON FLT PLAN INDICATED EXISTING TEMPORARY AIRMAN ADVISORY AB/CDE. CALLED DISPATCH WHO SAID THERE WAS NO TEMPORARY AIRMAN ADVISORY FOR MSY. PULLED UP PERFORMANCE DATA ON ACARS FOR RWY 28 AND TOOK OFF WITH THAT DATA. ONCE AIRBORNE; CALLED DISPATCH ON COMMERCIAL RADIO AND EXPLAINED THAT WE BELIEVED THERE SHOULD BE A TEMPORARY AIRMAN ADVISORY FOR THAT RWY. LATER INFLT; WE RECEIVED A MESSAGE FROM DISPATCH ON ACARS THAT TEMPORARY AIRMAN ADVISORY FG/HIJ WAS NOW IN SYS. SUPPLEMENTAL INFO FROM ACN 454900: I INFORMED THE CAPT THAT THE W 2745 FT OF RWY 01/28 AT MSY WAS CLOSED. THE CAPT CALLED DISPATCH AND INFORMED THEM OF THE ATIS INFO. I REQUESTED A NEW TKOF PWR SETTING FOR RWY 28 VIA ACARS. WE DEPARTED RWY 28 USING MAX PWR. DURING FLT WE RECEIVED A MESSAGE FROM DISPATCH THANKING US FOR THE ATIS INFO AND THAT A TEMPORARY ANALYSIS FOR RWY 10/28 HAD BEEN ISSUED IN THE SYS. THIS SUGGESTS THAT DISPATCH DID NOT PROVIDE US WITH AN ACCURATE TKOF PWR SETTING WHEN WE REQUESTED IT.