EF1 tornado, Bennington to Miltonvale, Kansas, May 5, 2007

1. EF065 to 85 mph

   Light damage. Surface peeled off some roofs, gutters and siding damaged, branches broken, shallow-rooted trees pushed over.

2. EF186 to 110 mphthis tornado

   Moderate damage. Roofs badly stripped, mobile homes overturned or badly damaged, exterior doors lost, windows broken.

3. EF2111 to 135 mph

   Considerable damage. Roofs torn off well-built houses, frame homes shifted on their foundations, mobile homes destroyed, large trees snapped or uprooted, cars lifted off the ground.

4. EF3136 to 165 mph

   Severe damage. Whole stories of well-built houses destroyed, large buildings badly damaged, trains overturned, trees debarked, heavy cars lifted and thrown.

5. EF4166 to 200 mph

   Devastating damage. Well-built houses leveled, structures with weak foundations moved some distance, cars thrown and large missiles generated.

6. EF5over 200 mph

   Incredible damage. Strong frame houses swept off their foundations, car-sized missiles thrown more than 100 meters, steel-reinforced concrete badly damaged, high-rise buildings deformed.

7. Unrated

   The survey recorded a tornado but could not put a number on it, most often because it crossed open country and damaged nothing a rating can be read from.

Rating

EF1

Date

May 5, 2007

Touchdown

12:01 AM CDT (05:01 UTC)

Lifted

12:12 AM CDT (05:12 UTC)

On the ground

11 minutes

Path length

10.1 miles (16.2 km)

Path width

200 yards (183 m)

Deaths

0

Injuries

0

Counties

Ottawa and Cloud counties

Touchdown point

39.280, -97.527

Lift-off point

39.393, -97.450

Record number

0705052301-01

An upper level low pressure system remained relatively stationary over the Central Plains Saturday through Monday, May 5th through May 7th. Severe weather swept across Northeast Kansas during the late evening hours the 5th, and the early morning of the 6th. Hail, strong winds, and tornadoes were all observed over the course of the evening. An F2 tornado that ripped across Ottawa County killed one woman, and injured one other when their mobile home was demolished. At least three other people were confirmed to have been injured during the tornado. NWS Storm Surveys the following day confirmed that damage was created by both tornadoes and strong winds across portions of northeast Kansas, but 6 tornadoes were confirmed. Cloud county qualified for FEMA funds.

The tornado touched down near the intersection of Granite Rd and 190th Rd approximately 3 miles south of the Ottawa State Fishing Lake. It lifted approximately 11 miles north of it's touchdown point, at Rifle Rd between 200th and 210th Rds. 38 structures were destroyed or damaged; including homes, mobile homes, cabins, outbuildings, and small cottages. A mobile home that was anchored to the ground was totally destroyed by the tornado.

The tornado touched down at Windmill Rd. between 220th and 230th Rds. Significant damage to a row of trees occurred. The tornado then crossed the county line, and moved into Cloud County.

Just after the tornado crossed the Cloud County line from Ottawa County, it destroyed a barn, damaged trees and the roof of a home, tore the roof off of a mobile home, and damaged power lines. Further north along the path, trees and outbuildings were destroyed, and two homes received minor damage.

The deaths

1 direct deaths are recorded for this tornado, each with what Storm Data knows of it.

From NOAA NCEI's Storm Events Database, the narrative the local forecast office wrote for Storm Data.

31 minutes of warning. NWS TOP issued a tornado warning for this county at 04:30 UTC, 31 minutes before the tornado touched down, in force until 05:15 UTC.

The county was under a tornado watch, issued at 02:08 UTC and running to 09:00 UTC.

Every warning and watch covering the touchdown point that day, from the Iowa Environmental Mesonet's archive of National Weather Service products. Lead time is measured from the issue of the warning in force to the touchdown time in the database, both of which were recorded to the minute by different people.

The Storm Prediction Center had this point in a Moderate Risk, with a 0.15 chance of a tornado within 25 miles, in the hatched area where significant tornadoes were expected. The outlook in force was issued at 00:59 UTC.

SPC's Day 1 convective outlook as it stood when the tornado began, read at the touchdown point. The same archive is on the radar archive.

The radiosonde launches on either side of the tornado, from the nearest station that was launching then, drawn and analyzed the way Storm Lab does: the same diagram, the same parcel and shear definitions SPC's mesoanalysis uses.

Concordia (CNK), 27 km from the path, in the two hours either side.

From the Iowa Environmental Mesonet's archive of airport observations.

The Topeka radar (KTWX), 115 km away, was scanning. The volume nearest the touchdown began at 05:01 UTC.

Open the radar archive at this moment, over the track

Reflectivity and velocity, decoded from the Level II archive in the browser. Volumes take a few seconds to open the first time.

Local storm reports within 60 km of the path, in the three hours either side.

From the Iowa Environmental Mesonet's archive of National Weather Service local storm reports.

The live radar over the trackEvery 2007 tornado in KansasEvery tornado in Kansas since 1950Warnings in force in Kansas nowThe forecast where you are

96 more were confirmed in the United States that day.

All 97 of them

Ratings are the survey's, read off the damage rather than measured; the rating scale is above. Tornado counts rise through the record as reporting improved, so a year in the 1950s is not comparable with one today except for the strongest tornadoes, which were always noticed.

NOAA Storm Prediction Center tornado database, 1950-2025, the official record kept by NOAA's Storm Prediction Center.