In June, a strong outbreak struck the upper midwest United States and in late August a powerful F5 tornado struck the city of Plainfield, Illinois, resulting in significant loss of life and damage.

In Nebraska, several strong tornadoes touched down across the southern and central portion of the state including an F4 that traveled for over 125 miles.

On June 1, 1990, a large, extremely violent, multi-vortex tornado passed over rural areas of Pecos County, Texas.

As the tornado grew to its maximum width of 1.3 miles, it destroyed an adobe brick house, earning an F4 rating.

The tornado weakened to F2 intensity, but became a killer as it tossed a dump truck and a car containing a family of four.

The tornado damaged and destroyed 57 pump jacks before lifting five miles southwest of the town of Iraan.

66 tornadoes struck the Ohio River Valley, including seven F4 twisters, resulting in nine deaths.

One F4 tornado trekked 106 miles (171 km) from southeastern Illinois into southern Indiana, killing one person.

37 tornadoes occurred in Indiana, eclipsing the previous record of 21 set during the 1974 Super Outbreak.

It spawned baseball-sized hail, funnel clouds, and at least nine tornadoes,[6] including an F2 east of Colorado Springs; a large tornado southwest of Limon, Colorado, of F3 intensity that lasted for 7 minutes; and the largest, a .25 mile- (.4 km) wide, rain-wrapped F3 that devastated the town of Limon along a 10-mile (16 km) path with near-F4 intensity.

[11] The event made national headlines and, as tornadoes of that size are rare in eastern Colorado, resulted in the publication of multiple academic articles, including one in the National Weather Digest by meteorologist Todd A. Heitkamp;[12] one in Weather and Forecasting by James F. W. Purdom, Edward J. Szoke, and John Weaver;[7] and another by James F. W. Purdom and John Weaver for the Sixth Conference on Satellite Meteorology and Oceanography.

[9] The storm was also documented on video by unknown observers[13] and in a collection of 25 photographs by meteorologist Eugene W. McCaul, Jr.[14] A violent F4 tornado touched down on the northwestern edge of Stratton, Nebraska as a multiple vortex tornado.

It would then move east-northeast and fully condense over Swanson Lake, before lifting 5 miles northeast of McCook.

The tornado destroyed three mobile homes, two sheds, a room of a brick house, and a small concrete building.

Steel-framed and reinforced concrete buildings were damaged, including a well-built hospital, and several vehicles were either thrown or overturned.

[18][19][20] A large, late-season outbreak of tornadoes affected Mississippi and Louisiana on December 20–22.