A tornado was reported on the ground in Riverton, Iowa, at 5:42 p.m. and law enforcement later confirmed it near the Fremont County town at 6:00 p.m., as people in Farragut, Shenandoah and Essex were told to take shelter immediately.
The warning covered a fast-moving stretch of southwest Iowa, where a Tornado Warning was in effect until 6:15 p.m. for Page and Fremont counties at 5:35 p.m. By 6:04 p.m., the tornado potential had moved into Page County and the warning shifted from confirmed to radar-indicated, with a new Tornado Warning for the county running until 7:00 p.m. at 6:19 p.m. A Flash Flood Warning was also in effect until 9 p.m. for Montgomery and Pottawattamie counties, underscoring how the same system was bringing more than one danger at once.
Earlier in the afternoon, a Tornado Watch was posted until 7:00 p.m. for portions of the viewing area, and severe weather continued to build as a cold front moved through the region trying to produce strong to severe storms. Another Tornado Warning was in effect until 6:30 p.m. for Atchison and Nodaway counties, while warnings had also been posted until 5:30 p.m. for Nemaha, Otoe and Johnson counties. Today was marked as a First Alert 6 Weather Day for the area.
The hard part now is not whether the threat was real — it was — but how far the line of storms would keep reaching as evening set in across southwest Iowa and nearby counties.