Tornadoes · United States · Montana · 2016
EF0 tornado, Homestead, Montana, May 9, 2016
This EF0 tornado ran 0.5 miles across Sheridan County on May 9, 2016, touching down at 7:25 PM MDT and reaching 30 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
- May 9, 2016
- Touchdown
- 7:25 PM MDT (01:25 UTC)
- Lifted
- 7:28 PM MDT (01:28 UTC)
- On the ground
- 3 minutes
- Path length
- 0.5 miles (0.7 km)
- Path width
- 30 yards (27 m)
- Deaths
- 0
- Injuries
- 0
- County
- Sheridan County
- Touchdown point
- 48.390, -104.490
- Lift-off point
- 48.390, -104.500
- Record number
- 1605091925-01
What the Weather Service recorded
A large, slow-moving low pressure system from the west provided just enough instability and general convection to allow this one brief weak landspout to form in an open field in Sheridan County.
Public reported a tornado moving across Highway 16 in Sheridan County. Subsequent photos and video suggest it was a weak landspout amid convective showers in the area near a front. Landspout occurred in an open field and pulled up some dirt, lasting for about 3 minutes.
From NOAA NCEI's Storm Events Database, the narrative the local forecast office wrote for Storm Data.
The warnings
No tornado warning for this county appears in the archive as in force at the moment the tornado touched down.
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 General Thunderstorms Risk. The outlook in force was issued at 00:44 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.
Glasgow Intl Airport, MT (KGGW), 00:00Z
1.4 hours before the tornado, 157 km from the path. May 10, 2016.
- Mixed-layer CAPE
- 56 J/kg
- Mixed-layer CIN
- -24 J/kg
- Surface CAPE
- 0 J/kg
- Mixed-layer LCL
- 652 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 318 m²/s²
- 0-3 km storm-relative helicity
- 236 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
- 0-3 km lapse rate
- 5.9 K/km
Glasgow Intl Airport, MT (KGGW), 12:00Z
10.6 hours after it, 157 km from the path. May 10, 2016.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- -62450 J/kg
- Surface CAPE
- 2 J/kg
- Mixed-layer LCL
- 610 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 359 m²/s²
- 0-3 km storm-relative helicity
- 461 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
- 0-3 km lapse rate
- 3.8 K/km
The radar
The Glasgow radar (KGGW), 159 km away, was scanning. The volume nearest the touchdown began at 01:27 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.
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 |
|---|---|---|---|---|
| 01:25 UTC | TORNADO | 26 Ne Brockton | Sheridan, MT | A WEAK LANDSPOUT OCCURRED WITH SOME CONVECTIVE SHOWERS IN THE REGION, IN THE AREA OF A FRONTAL BOUNDARY. IT WAS IN AN OPEN FIELD, PULLED UP SOME DIRT, BUT DISSIPATED VERY QUICKLY AND DID NOT TRAVEL MORE THAN A HUNDRED FE |
From the Iowa Environmental Mesonet's archive of National Weather Service local storm reports.
This ground now
The live radar over the trackEvery 2016 tornado in MontanaEvery tornado in Montana since 1950Warnings in force in Montana nowThe forecast where you are
The other tornadoes of May 9, 2016
27 more were confirmed in the United States that day.
| Date | Time | Rating | Where | Path (mi) | Width (yd) | Deaths | Injuries | Damage |
|---|---|---|---|---|---|---|---|---|
| May 9 | 3:06 PM CDT | EF0 | Davis, IA | 0.3 | 10 | |||
| May 9 | 4:06 PM CDT | EF4 | Katie–Wynnewood tornado, OK | 8.9 | 400 | 1 | $1.0 million | |
| May 9 | 4:25 PM CDT | EF1 | Lancaster, NE | 0.5 | 50 | |||
| May 9 | 4:30 PM CDT | EF0 | Buffalo, NE | 0.0 | 20 | |||
| May 9 | 4:34 PM CDT | EF3 | Murray, OK | 16.6 | 1,500 | $4.0 million | ||
| May 9 | 4:53 PM CDT | EF1 | Lancaster, NE | 0.2 | 50 | |||
| May 9 | 5:06 PM CDT | EF0 | Clay, NE | 2.7 | 35 | $75,000 | ||
| May 9 | 5:15 PM CDT | EF0 | McDonough, IL | 0.1 | 15 | |||
| May 9 | 5:16 PM CDT | Unrated | Cleveland, OK | 0.1 | 10 | |||
| May 9 | 5:18 PM CDT | EF0 | Louisa, IA | 0.1 | 10 | |||
| May 9 | 5:18 PM CDT | Unrated | Johnston, OK | 1.5 | 20 | |||
| May 9 | 5:18 PM CDT | EF3 | Johnston, OK | 9.1 | 700 | 1 | $250,000 | |
| May 9 | 5:41 PM CDT | EF0 | Warren, IL | 0.1 | 25 | |||
| May 9 | 5:46 PM CDT | EF1 | Coal, OK | 12.9 | 900 | $40,000 | ||
| May 9 | 5:47 PM CDT | Unrated | Atoka, OK | 0.3 | 30 | |||
| May 9 | 5:49 PM CDT | EF2 | Cass, NE | 3.3 | 100 | |||
| May 9 | 5:58 PM CDT | EF2 | Payne, OK | 6.3 | 600 | $260,000 | ||
| May 9 | 6:22 PM CDT | EF3 | Bryan, OK | 13.8 | 3,100 | 2 | $3.0 million | |
| May 9 | 6:40 PM CDT | EF0 | Clay, KS | 0.0 | 25 | |||
| May 9 | 7:02 PM CDT | EF1 | Choctaw, OK | 6.1 | 650 | $250,000 | ||
| May 9 | 7:18 PM CDT | Unrated | Choctaw, OK | 6.0 | 150 | |||
| May 9 | 7:25 PM CDT | Unrated | Choctaw, OK | 0.5 | 75 | |||
| May 9 | 7:46 PM CDT | EF0 | Guthrie, IA | 5.5 | 130 | $5,000 | ||
| May 9 | 8:18 PM CDT | EF0 | Guthrie, IA | 1.5 | 20 | |||
| May 9 | 8:59 PM CDT | EF1 | Bowie, TX | 2.0 | 390 | $10,000 | ||
| May 9 | 9:06 PM CDT | EF1 | Bowie, TX | 0.1 | 120 | |||
| May 9 | 10:34 PM CDT | EF1 | Saline, AR | 2.7 | 200 | $500,000 |
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.