The North Dakota tornadoes of July 18, 2004

What happened

• Storm reports can be found here
• Click here to go to Dave Carlsen's storm chase summary from the event
• Here are some news stories and NWS public information statements concerning these events

RADAR images

• Base reflectivity
• Storm-relative velocity tilt 1
• Storm-relative velocity tilt 2
• Storm-relative velocity tilt 3
• Storm-relative velocity tilt 4
• Base velocity tilt 1
• Base velocity tilt 2
• 01:59Z RADAR products
• 02:09Z RADAR products
• 02:14Z RADAR products
• 02:19Z RADAR products
• Vertically integrated liquid
• RADAR echo tops
• Storm total precipitation accumulation
• Velocity azimuth display
• USA reflectivity composite

Satellite pictures

• North Dakota visible
• USA visible

Upper air information

• 12Z upper air
• 00Z upper air
• Aberdeen, SD 00Z sounding
• Aberdeen, SD 00Z hodograph

Surface plots

• Surface plot of station data from 18Z to 05Z
• Surface plot of wind barbs from 18Z to 05Z
• Surface convective parameters from 02Z For a discussion of these parameters go here

Photographs

• Grand Forks NWS office's study of the event can be found here

• The following pictures are provided without copyright--feel free to distribute, but please give acknowledgement where it is due
  • Dave Carlsen's pictures
  • Jay Anderson's pictures
  • Natalie Hasell's pictures

Last update to this page: March 14, 2008