NWS confirms tornadoes in southwest Iowa Thursday
The strongest tornado from Thursday night's storms was rated an EF-1
The strongest tornado from Thursday night's storms was rated an EF-1
The strongest tornado from Thursday night's storms was rated an EF-1
The National Weather Service in Omaha has revised the width of Thursday night's tornado in Fremont and Page counties.
NWS previously estimated the EF-1 tornado's width as 3,130 yards across. After further review of the damage, the tornado's size appears to have been about 1,900 yards wide.
Some damage originally appeared to be tornadic, but was actually caused by straight-line winds from the parent thunderstorm.
The original story is below.
===================================
The tornado that tracked across portions of Fremont and Page counties during Thursday night's storms appears to be the widest tornado on record for Iowa.
The National Weather Service says the EF-1 tornado touched town near Randolph, then tracked south of Imogene and then just north of Essex before dissipating near Nyman. The tornado was on the ground for 19.7 miles.
Wind speeds up to 110 mph damaged numerous power poles as well as several farm outbuildings, with severe damage to several of the buildings south of Imogene.
At one point, the tornado was roughly 3,130 yards wide, or around 1.75 miles. This would make it around 500 yards wider than the previous record holder, a tornado that struck near Pocahontas on April 9, 2011, that was around 1.5 miles wide.
While the tornado was extremely wide, wind speeds appear to have topped out around 110 mph. However, given the rural area, it is possible that winds were stronger in parts of the tornado's path, but did not damage anything significant enough for the National Weather Service to assign a higher rating.
Tornadoes greater than 1.5 miles in width are extremely rare, with only 30 recorded tornadoes reaching that size across the country.
Large hail pelts driver near Shenandoah in southwest Iowa