historical

Where can I find information about tornadoes that have occurred in Tulsa and in Oklahoma?

The Storm Prediction Center of the National Weather Service includes maps, tracks, averages and summaries that apply to tornadic activity in the United States.  The Norman office of the National Weather Service keeps a historic list of tornado data by county.  The EF Scale became operational on February 1, 2007 and is used to assign a tornado a 'rating' based on estimated wind speeds and related damage.

Where can I go to look at the Sanborn Fire Insurance Maps?

Several years ago, the Tulsa City County Library donated their Sanborn Maps to the Tulsa Historical Society. The Sanborn Fire Insurance Maps for the city of Tulsa can be viewed at THS. Contact the Tulsa Historical Society at: 2445 S. Peoria, Tulsa OK 74114. Phone: (918)712-9484.
The Tulsa City County Library does have access to digital Sanborn Maps (1867-1970). These are available from home and all TCCL libraries with a valid library card.

Source: Tulsa City County Library Staff.