Unrated tornado, Volland to Chalk Mound, Kansas, August 15, 2019

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 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. Unratedthis tornado

   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

Unrated

Date

August 15, 2019

Touchdown

8:41 PM CDT (01:41 UTC)

Lifted

8:48 PM CDT (01:48 UTC)

On the ground

7 minutes

Path length

1.6 miles (2.6 km)

Path width

25 yards (23 m)

Deaths

0

Injuries

0

County

Wabaunsee County

Touchdown point

38.879, -96.314

Lift-off point

38.869, -96.288

Record number

1908151941-01

7 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 97 mph.

• looking NE debris blown S so west side of vortex
• newly reconstructed barn uplift of entire structure near center of path
• trunks snapped to the NW so east side of circulation
• garage walls collapsed straight nailed

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

Supercell thunderstorms developed and moved slowly southeast across the area. Wabaunsee County was hit hardest by the storms where at least 4 tornadoes appeared to have occurred.

Storm Chasers reported brief touchdown in open field. This tornado then moved into Wabaunsee County through open pasture. Minor tree and tree limb damage was reported with this tornado however location suggests this could have been associated with RFD on south side of circulation and not tornado itself. Therefore it will be rated EFU.

Storm chaser footage and NWS damage survey found a tornado with a path that moved north northwest for approximately 7 miles. Damage occurred to well constructed renovated barns along the path. Winds estimated to have been around 100 mph producing EF1 damage.

Law enforcement reported 2 small tornadoes over this area of the county. This is the southern tornado. No damage was noted with the tornadoes owing to being over open pastureland however reports and radar do suggest that they existed in some form. Path and time are estimated off radar and reports.

Law enforcement reported 2 small tornadoes this is the northern tornado. No damage was noted with the tornadoes however reports and radar do suggest that they existed in some form. Path and time are estimated off radar and reports.

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

24 minutes of warning. NWS TOP issued a tornado warning for this county at 01:17 UTC, 24 minutes before the tornado touched down, in force until 02:00 UTC.

The county was under a tornado watch, issued at 23:10 UTC and running to 05:00 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 Enhanced Risk, with a 0.05 chance of a tornado within 25 miles. The outlook in force was issued at 01:06 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.

The Topeka radar (KTWX), 15 km away, was scanning. The volume nearest the touchdown began at 01:43 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 2019 tornado in KansasEvery tornado in Kansas since 1950Warnings in force in Kansas nowThe forecast where you are

5 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.