Tornadoes · United States · Kansas · 2010
EF0 tornado, Brownville, Kansas, September 14, 2010
This EF0 tornado ran 0.9 miles across Thomas County on September 14, 2010, touching down at 10:35 PM CDT and reaching 20 yards wide. It killed nobody.
The rating scale
Tracks are drawn in the color of the rating. The Enhanced Fujita scale rates the damage rather than measuring the wind: the speeds are what that damage is taken to imply.
EF065 to 85 mphthis tornado
Light damage. Surface peeled off some roofs, gutters and siding damaged, branches broken, shallow-rooted trees pushed over.
EF186 to 110 mph
Moderate damage. Roofs badly stripped, mobile homes overturned or badly damaged, exterior doors lost, windows broken.
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.
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.
EF4166 to 200 mph
Devastating damage. Well-built houses leveled, structures with weak foundations moved some distance, cars thrown and large missiles generated.
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.
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.
The record
- Rating
- EF0
- Date
- September 14, 2010
- Touchdown
- 10:35 PM CDT (03:35 UTC)
- Lifted
- 10:37 PM CDT (03:37 UTC)
- On the ground
- 2 minutes
- Path length
- 0.9 miles (1.5 km)
- Path width
- 20 yards (18 m)
- Deaths
- 0
- Injuries
- 0
- County
- Thomas County
- Touchdown point
- 39.223, -101.298
- Lift-off point
- 39.217, -101.283
- Record number
- 1009142135-01
What the Weather Service recorded
A line of thunderstorms developed over northeast Colorado and moved southeast into Kansas during the evening. The storms intensified, producing 60 to 80 mph wind gusts and several tornadoes in northwest Kansas.
A brief tornado was reported by a storm chaser. The tornado remained over open fields with no known damage.
The tornado remained over open fields with no known damage.
From NOAA NCEI's Storm Events Database, the narrative the local forecast office wrote for Storm Data.
The warnings
58 minutes of warning. NWS GLD issued a tornado warning for this county at 02:37 UTC, 58 minutes before the tornado touched down, in force until 03:45 UTC.
The county was under a severe thunderstorm watch, issued at 00:28 UTC and running to 07:00 UTC.
| Issued (UTC) | Expired | Product | Office |
|---|---|---|---|
| 13:20 UTC | 16:00 UTC | Dense Fog Advisory | GLD |
| 00:28 UTC | 07:00 UTC | Severe Thunderstorm Watch | GLD |
| 02:37 UTC | 03:45 UTC | Tornado Warning | GLD |
| 03:12 UTC | 04:15 UTC | Tornado Warning | GLD |
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 forecast that day
The Storm Prediction Center had this point in a Slight Risk, with a 0.02 chance of a tornado within 25 miles. The outlook in force was issued at 01:00 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 air that afternoon
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.
Denver, CO (KDNR), 00:00Z
3.6 hours before the tornado, 181 km from the path. September 15, 2010.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- -69421 J/kg
- Surface CAPE
- 18 J/kg
- Mixed-layer LCL
- 4172 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 130 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
- 0-3 km lapse rate
- 9.7 K/km
Denver, CO (KDNR), 12:00Z
8.4 hours after it, 181 km from the path. September 15, 2010.
- Mixed-layer CAPE
- 9 J/kg
- Mixed-layer CIN
- -313 J/kg
- Surface CAPE
- 0 J/kg
- Mixed-layer LCL
- 1648 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- -159 m²/s²
- 0-3 km storm-relative helicity
- 23 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
- 0-3 km lapse rate
- 4.6 K/km
The surface observations
Colby (CBK), 31 km from the path, in the two hours either side.
| Time (UTC) | Temp (°F) | Dew point (°F) | Wind | Gust (kt) | Pressure (mb) | Weather |
|---|---|---|---|---|---|---|
| 01:53 UTC | 78 | 57 | 120° 20 kt | 25 | 1012.2 | VCTS |
| 02:53 UTC | 67 | 60 | 40° 6 kt | 26 | 1016.3 | -TSRA |
| 03:53 UTC | 67 | 63 | 90° 18 kt | 25 | 1015.2 | |
| 04:53 UTC | 65 | 64 | 90° 12 kt | 1014.9 |
From the Iowa Environmental Mesonet's archive of airport observations.
The radar
The Goodland radar (KGLD), 39 km away, was scanning. The volume nearest the touchdown began at 03:35 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.
What was reported nearby
Local storm reports within 60 km of the path, in the three hours either side.
| Time (UTC) | Report | Where | County | Remark |
|---|---|---|---|---|
| 02:05 UTC | TORNADO | 9 N Ruleton | Sherman, KS | OFF DUTY NWS EMPLOYEE REPORTED LARGE CONE TORNADO WHICH HAS SINCE BECOME RAIN WRAPPED. |
| 02:26 UTC | TSTM WND GST 60 | 13 N Goodland | Sherman, KS | |
| 02:30 UTC | HAIL 1 | 3 N Goodland | Sherman, KS | |
| 02:32 UTC | TSTM WND GST 78 | 1 Nne Goodland | Sherman, KS | |
| 02:39 UTC | FUNNEL CLOUD | 7 Ne Goodland | Sherman, KS | LAW ENFORCEMENT RELAYED PUBLIC REPORT OF FUNNEL CLOUD |
| 02:52 UTC | FUNNEL CLOUD | 6 N Edson | Sherman, KS | WELL DEFINED WALL CLOUD WITH PERIODIC CONE FUNNEL |
| 02:52 UTC | HAIL 1.75 | Se Edson | Sherman, KS | REPORTED AT EDSON EXIT ON INTERSTATE 70 BY KANSAS STATE TROOPER |
| 03:14 UTC | HAIL 0.88 | Brewster | Thomas, KS | |
| 03:15 UTC | HAIL 1 | 1 N Brewster | Thomas, KS | |
| 03:35 UTC | TORNADO | 9 Sse Brewster | Thomas, KS | |
| 03:39 UTC | TSTM WND DMG | 8 N Winona | Thomas, KS | SIDING ON THE EAST SIDE OF A HOUSE DAMAGED. |
| 03:52 UTC | HAIL 1.75 | 7 N Winona | Thomas, KS | |
| 03:55 UTC | TORNADO | 8 Ne Winona | Thomas, KS | |
| 04:18 UTC | HAIL 0.88 | 4 W Monument | Logan, KS | |
| 04:32 UTC | HAIL 1 | 3 Ene Monument | Logan, KS |
From the Iowa Environmental Mesonet's archive of National Weather Service local storm reports.
This ground now
The live radar over the trackEvery 2010 tornado in KansasEvery tornado in Kansas since 1950Warnings in force in Kansas nowThe forecast where you are
The other tornadoes of September 14, 2010
2 more were confirmed in the United States that day.
| Date | Time | Rating | Where | Path (mi) | Width (yd) | Deaths | Injuries | Damage |
|---|---|---|---|---|---|---|---|---|
| September 14 | 8:05 PM MDT | EF0 | Sherman, KS | 2.5 | 50 | |||
| September 14 | 10:55 PM CDT | EF0 | Thomas, KS | 0.7 | 10 |
What this means
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.
Sources
NOAA Storm Prediction Center tornado database, 1950-2025, the official record kept by NOAA's Storm Prediction Center.