Scientists raced to track and measure tornado

The crew’s route took them across the path of the storm.

A map of the storm chasers' route which began in Treynor, Iowa at 1:08pm, headed south, then east arriving at the tornado's start point southwest of Cornina, Iowa about half an hour before the tornado began at 2:57pm CST. The crew then raced north, turned west and hovered near the tornado's path around the end of its journey at 3:43pm.

Greenfield

3:30pm

3:43pm

2:57pm

Crew’s location when tornado ends

Crew’s location when tornado begins

5:00pm

5:30pm

Corning

2:30pm

Greenfield tornado

2:57-3:43pm

IOWA

20 miles

Greenfield

3:43pm

Crew’s location when tornado ends

2:57pm

Crew’s location when tornado begins

6:00pm

Corning

Greenfield tornado

2:57-3:43pm

IOWA

20 miles

Greenfield

3:30pm

3:43pm

Treynor

2:57pm

crew’s location when tornado endsv

Crew’s location when tornado begins

1:08pm

Crew departs

5:30pm

1:30pm

6:00pm

Corning

2:30pm

2:00pm

Greenfield tornado

2:57-3:43pm

IOWA

20 miles

Greenfield

3:30pm

3:43pm

Treynor

Crew’s location when tornado ends

2:57pm

1:08pm

Crew’s location when tornado begins

Crew departs

5:30pm

1:30pm

6:00pm

Corning

2:30pm

2:00pm

Greenfield tornado

2:57-3:43pm

IOWA

20 miles

Greenfield

3:43pm

Crew’s location when tornado ends

2:57pm

3:30pm

Treynor

Crew’s location when

tornado begins

1:08pm

5:00pm

Crew departs

5:30pm

1:30pm

6:00pm

Corning

2:30pm

2:00pm

Greenfield tornado

2:57-3:43pm

IOWA

20 miles