Jonathan Tannen, a West Philly-based urban demographer, runs a data-centric blog focused on Philly and local elections called Sixty-Six Wards.

In honor of Tuesday’s primary elections — happening across Pennsylvania and three other states — Tannen’s blog rolled out a data analytics model that estimates turnout numbers across town based on self-reported voter data.

Using voters’ ward, division, time of day and voter number — coupled with historic turnout data for the wards that haven’t self reported — Tannen’s model estimates that, as of 11:48, some 62,881 Philadelphians have cast their vote across the city, based on self-reported data from 201 voters in 38 wards.

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