Tornado in Tulsa?

Apparently we were the one's that were fooled. It seems there was a tornado in Tulsa around 11:15p.m. when the squall line moved into Tulsa. The NWS is reporting a F1 touched down for about 25 seconds just SW of Tulsa International Airport and did damage to a hotel and cars. I first read this on KTUL's website in disbelief, but then found the NWS report. I don't think this was an April Fool's joke by the NWS, but I'm wondering if it was caused by a derecho or microburst.

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
537 PM CDT SUN APR 2 2006

AT 1114 PM CST LAST NIGHT /APRIL 1ST/ A BRIEF TORNADO TOUCHED DOWN IN TULSA...IMMEDIATELY SOUTHWEST OF THE TULSA INTERNATIONAL AIRPORT.

NWS Public Information Statement
KTUL News Article