EF0 tornado, Miltonvale to St Joseph, Kansas, May 6, 2015

1. EF065 to 85 mphthis tornado

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

2. EF186 to 110 mph

   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

EF0

Date

May 6, 2015

Touchdown

9:27 PM CDT (02:27 UTC)

Lifted

9:41 PM CDT (02:41 UTC)

On the ground

14 minutes

Path length

8.8 miles (14.2 km)

Path width

75 yards (69 m)

Deaths

0

Injuries

0

County

Cloud County

Touchdown point

39.394, -97.467

Lift-off point

39.508, -97.394

Record number

1505062027-01

6 damage points were recorded along this path by NWS TOP, in the Damage Assessment Toolkit the survey teams carry. The strongest indicator was rated EF1. The highest wind the damage implies is 105 mph.

• Reports of power poles downed by Emergency Management. spotter also reported tornado in this area around 1005 pm.
• Reports of tree damage 3 miles southwest of highway 9 on road 809.
• power poles reported down from this point northward.

Survey points are preliminary and are the raw material the published rating was built from. Source: NWS Damage Assessment Toolkit.

Approximately 14 tornadoes were documented and confirmed via reports and radar data all occurring during the late afternoon and evening of May 6th. The tornadoes impacted Republic, Cloud, Washington and Clay Counties. In fact, 7 tornadoes alone occurred in Republic County. This was the largest one day outbreak of tornadoes in the past 10 years for NWS Topeka. The strongest tornado was an EF3 that destroyed a home south of Munden in Republic county. The longest was over 25 miles in length also across Republic county.

Chaser Report of a tornado along with reports of tree limb damage along a path combined with radar data suggests that a tornado traveled along a track for approx. 8 miles between Miltonvale and Clyde.

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

29 minutes of warning. NWS TOP issued a tornado warning for this county at 01:58 UTC, 29 minutes before the tornado touched down, in force until 02:30 UTC.

The county was under a tornado watch, issued at 01:38 UTC and running to 05:54 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 Slight Risk, with a 0.05 chance of a tornado within 25 miles. The outlook in force was issued at 01:01 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), 22 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 02:27 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 2015 tornado in KansasEvery tornado in Kansas since 1950Warnings in force in Kansas nowThe forecast where you are

47 more were confirmed in the United States that day.

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.