EF1 tornado, St Francis Arpt to Hale, Kansas, May 11, 2023

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 11, 2023

Touchdown

12:57 PM CDT (17:57 UTC)

Lifted

1:03 PM CDT (18:03 UTC)

On the ground

6 minutes

Path length

5.2 miles (8.3 km)

Path width

100 yards (91 m)

Deaths

0

Injuries

0

Counties

Cheyenne and Yuma counties

Touchdown point

39.590, -102.020

Lift-off point

39.630, -102.090

Record number

2305111157-01

5 damage points were recorded along this path by NWS GLD, in the Damage Assessment Toolkit the survey teams carry. The strongest indicator was rated EF1. The highest wind the damage implies is 100 mph.

• Some evidence 4 power poles were replaced along road D
• Potential debris deposited from collapsed outbuilding at road 2
• Potential source of tin dead trees damaged nearby, may be old damage
• Likely tornado start point

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

A high impact storm system moved across Northwest Kansas. The storm system produced an environment that was favorable for any of the developing thunderstorms to produce a tornado, which led to multiple tornadoes occurring on this day. The strongest tornado was rated an EF-1 which caused damage to the high school in Weskan. ||Otherwise thunderstorms produced hail up to half dollar in size near Wallace, and wind gusts estimated up to 65 MPH near Campus. The thunderstorms on this day were heavy rain producers, with rainfall amounts ranging from two to four inches. This led to some towns having street flooding as the storms moved through. One location near Weskan had flood damage a barn.||The repeated rounds of heavy rainfall over the Ludell area, combined with runoff being funneled into Beaver Creek from the area, caused flooding to occur at Ludell. The flood waters also flooded the county road going east from Ludell that followed Beaver Creek to Herndon.

A high impact storm system moved across East Central Colorado. The storm system produced an environment that was favorable for any of the developing thunderstorms to produce a tornado, which led to several tornadoes occurring on this day. The strongest tornado of the day was an EF 1 that formed in Cheyenne County Kansas, caused damage, and carried that damage into Yum County.||The largest hail reported was dime size at Cheyenne Wells. The strongest wind gust was 65 MPH near Kirk.

Tornado remained mostly over open fields. There was a debris signature on radar, which was likely dust but there were some dead trees and sheet metal from an abandoned property that may have been lofted. Rating determined by 4 power poles that were recently replaced in far southwestern Cheyenne County Kansas.

Tornado remained mostly over open fields. There was a debris signature on radar, which was likely dust but there were some dead trees and sheet metal from an abandoned property that may have been lofted within Cheyenne County Kansas, but carried over into Yuma County.

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

1 minute of warning. NWS GLD issued a tornado warning for this county at 17:56 UTC, 1 minute before the tornado touched down, in force until 18:08 UTC.

The county was under a tornado watch, issued at 17:24 UTC and running to 01:00 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 Slight Risk, with a 0.05 chance of a tornado within 25 miles. The outlook in force was issued at 16:41 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 Goodland radar (KGLD), 41 km away, was scanning. The volume nearest the touchdown began at 17:57 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 2023 tornado in KansasEvery tornado in Kansas since 1950Warnings in force in Kansas nowThe forecast where you are

32 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.