On the afternoon of June 6, 2006, a tornado warning was issued for Johnson County. In some precincts, pollworkers had to temporarily close the polling place and take shelter. Voting hours were not extended to make up for the temporary closing - all polling places closed at 9 p.m. as originally scheduled. Voters in line by 9 p.m. were allowed to vote.
This report details whether or not polling places were closed for the tornado warning and, if so, how long the polls remained closed.
| Precinct | Did you take cover? | What time did you close? | What time did you re-open? |
| Big Grove | No | ||
| Cedar | Yes | 3:20 | 4:00 |
| Clear Creek | No | ||
| Coralville 01 | No | ||
| Coralville 02 | No | ||
| Coralville 03 | No | ||
| Coralville 04 | No | ||
| Coralville 05 | Yes | 3:10 | 3:45 |
| Coralville 06 | No | ||
| Fremont | No | ||
| Graham | No | ||
| Hardin | No | ||
| Iowa City 01 | Yes | 3:00 | 4:00 |
| Iowa City 02 | Yes | 3:40 | 4:05 |
| Iowa City 03 | No | ||
| Iowa City 04 | No | ||
| Iowa City 05 | No | ||
| Iowa City 06 | Yes | 3:00 | 4:00 |
| Iowa City 07 | No | ||
| Iowa City 08 | No | ||
| Iowa City 09 | No | ||
| Iowa City 10 | Yes | 3:15 | 4:00 |
| Iowa City 11 | No | ||
| Iowa City 12 | Yes | 4:10 | 4:15 |
| Iowa City 13 | Yes | 3:04 | 3:23 |
| Iowa City 14 | Yes | 3:45 | 3:50 |
| Iowa City 15 | Yes | 4:00 | 4:10 |
| Iowa City 16 | No | ||
| Iowa City 17 | Yes | 2:55 | 3:55 |
| Iowa City 18 | No | ||
| Iowa City 19 | Yes | 3:00 | 4:00 |
| Iowa City 20 | Yes | 3:00 | 4:15 |
| Iowa City 21 | Yes | 3:30 | 4:10 |
| Iowa City 22 | No | ||
| Iowa City 23 | No | ||
| Iowa City 24 | No | ||
| Iowa City 25 | No | ||
| Jefferson East | No | ||
| Jefferson West | Yes | 3:00 | 3:30 |
| Liberty | No | ||
| Lincoln | No | ||
| Madison | Yes | 3:00 | 3:30 |
| Monroe | No | ||
| Newport | No | ||
| North Liberty 01 | Yes | 3:10 | 4:10 |
| North Liberty 02 | No | ||
| Oxford | No | ||
| Penn | No | ||
| Pleasant Valley | No | ||
| Scott | No | ||
| Sharon | No | ||
| Solon | No | ||
| Tiffin | No | ||
| Union | No | ||
| University Heights | No | ||
| Washington | No | ||
| West Lucas | No |