Tornadoes · United States · Oklahoma · 2015
EF0 tornado, Randlett, Oklahoma, May 8, 2015
This EF0 tornado ran 0.2 miles across Cotton County on May 8, 2015, touching down at 6:04 PM CDT and reaching 50 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 8, 2015
- Touchdown
- 6:04 PM CDT (23:04 UTC)
- Path length
- 0.2 miles (0.3 km)
- Path width
- 50 yards (46 m)
- Deaths
- 0
- Injuries
- 0
- County
- Cotton County
- Touchdown point
- 34.180, -98.495
- Lift-off point
- 34.180, -98.495
- Record number
- 1505081704-01
What the Weather Service recorded
Another round of storms developed across the Texas panhandle and developed into a line as it moved eastward across southern Oklahoma.
A report was relayed via media of a brief rain-wrapped tornado damaging road signs near the interchange of Interstate 44 and US-277.
A storm chaser reported a tornado briefly developed approximately 5 miles east or east-southeast of Randlett. No damage was reported.
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. One was issued for the county at another hour that day.
The county was under a tornado watch, issued at 17:51 UTC and running to 00:36 UTC.
| Issued (UTC) | Expired | Product | Office |
|---|---|---|---|
| 17:51 UTC | 00:36 UTC | Tornado Watch | OUN |
| 22:05 UTC | 22:45 UTC | Tornado Warning | OUN |
| 22:37 UTC | 23:45 UTC | Severe Thunderstorm Warning | OUN |
| 23:14 UTC | 00:00 UTC | Tornado Warning | OUN |
| 23:45 UTC | 00:21 UTC | Severe Thunderstorm Warning | OUN |
| 23:53 UTC | 04:00 UTC | Flash Flood Warning | OUN |
| 00:00 UTC | 20:51 UTC | Flood Warning | OUN |
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 Moderate Risk, with a 0.10 chance of a tornado within 25 miles. The outlook in force was issued at 19:40 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.
Norman, OK (KOUN), 12:00Z
11.1 hours before the tornado, 153 km from the path. May 8, 2015.
- Mixed-layer CAPE
- 171 J/kg
- Mixed-layer CIN
- -108 J/kg
- Surface CAPE
- 37 J/kg
- Mixed-layer LCL
- 656 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 180 m²/s²
- 0-3 km storm-relative helicity
- 119 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
- 0-3 km lapse rate
- 3.9 K/km
Norman, OK (KOUN), 00:00Z
0.9 hours after it, 153 km from the path. May 9, 2015.
- Mixed-layer CAPE
- 20 J/kg
- Mixed-layer CIN
- -110 J/kg
- Surface CAPE
- 69 J/kg
- Mixed-layer LCL
- 577 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km bulk shear
- 3 kt
- 0-1 km storm-relative helicity
- -54 m²/s²
- 0-3 km storm-relative helicity
- 372 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
- 0-3 km lapse rate
- 5.3 K/km
The surface observations
Wichita Falls/Shep (SPS), 22 km from the path, in the two hours either side.
| Time (UTC) | Temp (°F) | Dew point (°F) | Wind | Gust (kt) | Pressure (mb) | Weather |
|---|---|---|---|---|---|---|
| 21:52 UTC | 79 | 68 | 1008.8 | |||
| 22:14 UTC | 78 | 69 | 120° 11 kt | 1007.5 | TS | |
| 22:52 UTC | 77 | 69 | 120° 6 kt | 1008.5 | TSRA | |
| 23:09 UTC | 66 | 64 | 340° 19 kt | 28 | 1009.1 | TSRA BR |
| 23:13 UTC | 66 | 64 | 330° 23 kt | 36 | 1009.5 | TSRA BR |
| 23:18 UTC | 65 | 64 | 330° 22 kt | 36 | 1009.8 | TSRA FG |
| 23:33 UTC | 66 | 65 | 20° 23 kt | 29 | 1009.8 | TSRAGR |
| 23:44 UTC | 66 | 65 | 50° 16 kt | 37 | 1010.5 | TSRA |
| 23:52 UTC | 67 | 65 | 70° 17 kt | 23 | 1011.2 | TSRA |
| 23:59 UTC | 67 | 65 | 40° 11 kt | 23 | 1011.2 | TSRA |
| 00:52 UTC | 67 | 64 | 3 kt | 1008.8 | TSRA | |
| 01:01 UTC | 67 | 64 | 30° 11 kt | 18 | 1008.1 | TSRA |
From the Iowa Environmental Mesonet's archive of airport observations.
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 |
|---|---|---|---|---|
| 22:39 UTC | HAIL 2.75 | Grandfield | Tillman, OK | |
| 23:04 UTC | TORNADO | 2 W Randlett | Cotton, OK | TORNADO REPORTED NEAR THE INTERSTATE 44 AND US-277 INTERCHANGE WEST OF RANDLETT. SIGNS WERE DAMAGED. |
| 23:16 UTC | TORNADO | 5 E Randlett | Cotton, OK | A STORM CHASER REPORTED A BRIEF TORNADO. |
| 23:44 UTC | FLASH FLOOD | Lawton | Comanche, OK | 1 IN OF RAIN RECORDED IN HALF AN HOUR. FLOODING IN STREETS WITH WATER ENCROACHING ON HOMES. |
| 00:08 UTC | TORNADO | 1 E Waurika | Jefferson, OK | TIME AND LOCATION ESTIMATED. |
| 00:08 UTC | TORNADO | 1 E Waurika | Jefferson, OK | |
| 00:35 UTC | FLASH FLOOD | Comanche | Stephens, OK | STREET FLOODING ON MAIN ROADS. GRAVEL ROADS IN RURAL AREAS WASHED OUT. |
| 01:02 UTC | FLOOD | Waurika | Jefferson, OK | STREET FLOODING. |
| 01:11 UTC | FLOOD | Waurika | Jefferson, OK | MAIN AT US 70 UNDER SEVERAL FEET OF WATER. NOT AFFECTING STRUCTURES AT TIME OF REPORT. |
From the Iowa Environmental Mesonet's archive of National Weather Service local storm reports.
This ground now
The live radar over the trackEvery 2015 tornado in OklahomaEvery tornado in Oklahoma since 1950Warnings in force in Oklahoma nowThe forecast where you are
The other tornadoes of May 8, 2015
10 more were confirmed in the United States that day.
| Date | Time | Rating | Where | Path (mi) | Width (yd) | Deaths | Injuries | Damage |
|---|---|---|---|---|---|---|---|---|
| May 8 | 4:22 PM CDT | EF0 | Wilbarger, TX | 0.3 | 30 | |||
| May 8 | 4:28 PM CDT | EF1 | Wilbarger, TX | 3.5 | 100 | |||
| May 8 | 5:21 PM CDT | EF0 | Wichita, TX | 0.3 | 50 | |||
| May 8 | 5:30 PM CDT | EF0 | Haskell, TX | 0.2 | 35 | |||
| May 8 | 6:16 PM CDT | EF0 | Cotton, OK | 0.2 | 50 | |||
| May 8 | 6:22 PM CDT | EF0 | Throckmorton, TX | 0.3 | 35 | |||
| May 8 | 6:40 PM CDT | EF0 | Jefferson, OK | 0.5 | 50 | |||
| May 8 | 6:40 PM CDT | EF0 | Throckmorton, TX | 0.2 | 25 | |||
| May 8 | 7:08 PM CDT | EF0 | Jefferson, OK | 0.2 | 50 | |||
| May 8 | 6:12 PM MDT | EF0 | Otero, CO | 0.8 | 50 |
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.