Tornadoes · United States · Nebraska · 2003
F0 tornado, Sargent to Comstock, Nebraska, June 9, 2003
From Sargent to Comstock, this F0 tornado ran 0.1 miles across Custer County on June 9, 2003, touching down at 7:20 PM CDT and reaching 10 yards wide. It killed nobody.
The rating scale
Tracks are drawn in the color of the rating. The Fujita scale rates the damage rather than measuring the wind: the speeds are what that damage is taken to imply.
F040 to 72 mphthis tornado
Light damage. Surface peeled off some roofs, gutters and siding damaged, branches broken, shallow-rooted trees pushed over.
F173 to 112 mph
Moderate damage. Roofs badly stripped, mobile homes overturned or badly damaged, exterior doors lost, windows broken.
F2113 to 157 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.
F3158 to 206 mph
Severe damage. Whole stories of well-built houses destroyed, large buildings badly damaged, trains overturned, trees debarked, heavy cars lifted and thrown.
F4207 to 260 mph
Devastating damage. Well-built houses leveled, structures with weak foundations moved some distance, cars thrown and large missiles generated.
F5261 to 318 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
- F0
- Date
- June 9, 2003
- Touchdown
- 7:20 PM CDT (00:20 UTC)
- Path length
- 0.1 miles (0.2 km)
- Path width
- 10 yards (9 m)
- Deaths
- 0
- Injuries
- 0
- County
- Custer County
- Touchdown point
- 41.600, -99.420
- Lift-off point
- 41.600, -99.420
- Record number
- 1179
What the Weather Service recorded
The tornado touched down briefly in an open pasture.
The tornado made a brief touchdown in an open pasture.
The tornado touched down in an open field and then moved east through a corn field overturning a pivot irrigation system and snapping off hundreds of large tree limbs in the adjacent shelter belt. The tornado also destroyed a barn and grain bins at a nearby farm. The tornado then crossed the county road just 2 miles north of Comstock and destroyed another barn, overturned another pivot irrigation system, and broke off several power poles. As the tornado continued to move east, it broke off and uprooted numerous trees. Baseball size hail associated with the storm broke many windows in homes near the path of the tornado and also in the town of Comstock.
From NOAA NCEI's Storm Events Database, the narrative the local forecast office wrote for Storm Data.
The warnings
28 minutes of warning. NWS LBF issued a tornado warning for this county at 23:52 UTC, 28 minutes before the tornado touched down, in force until 00:30 UTC.
| Issued (UTC) | Expired | Product | Office |
|---|---|---|---|
| 22:47 UTC | 23:45 UTC | Severe Thunderstorm Warning | LBF |
| 23:45 UTC | 00:30 UTC | Severe Thunderstorm Warning | LBF |
| 23:52 UTC | 00:30 UTC | Tornado Warning | LBF |
| 00:32 UTC | 01:00 UTC | Tornado Warning | LBF |
| 01:00 UTC | 01:30 UTC | Tornado Warning | LBF |
| 01:28 UTC | 02:15 UTC | Tornado Warning | LBF |
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 0.05 chance of a tornado within 25 miles. The outlook in force was issued at 20:06 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 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.
N. Platte/Lee Bi, NE (KLBF), 00:00Z
0.3 hours before the tornado, 111 km from the path. June 10, 2003.
- Mixed-layer CAPE
- 301 J/kg
- Mixed-layer CIN
- -11 J/kg
- Surface CAPE
- 2997 J/kg
- Mixed-layer LCL
- 3407 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 89 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.9
- 0-3 km lapse rate
- 9.3 K/km
N. Platte/Lee Bi, NE (KLBF), 12:00Z
11.7 hours after it, 111 km from the path. June 10, 2003.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- -23906 J/kg
- Surface CAPE
- 0 J/kg
- Mixed-layer LCL
- 893 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- -77 m²/s²
- 0-3 km storm-relative helicity
- -48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
- 0-3 km lapse rate
- 3.0 K/km
The surface observations
Broken Bow Municipal (BBW), 26 km from the path, in the two hours either side.
| Time (UTC) | Temp (°F) | Dew point (°F) | Wind | Gust (kt) | Pressure (mb) | Weather |
|---|---|---|---|---|---|---|
| 22:53 UTC | 82 | 65 | 180° 15 kt | 1002 | ||
| 23:53 UTC | 83 | 66 | 190° 22 kt | 31 | 1000.7 | |
| 00:53 UTC | 81 | 66 | 270° 25 kt | 31 | 1000.7 | |
| 01:00 UTC | 80.6 | 64.4 | 220° 16 kt | 31 | 1001 | -RA |
| 01:53 UTC | 77 | 55 | 310° 8 kt | 1002.7 |
From the Iowa Environmental Mesonet's archive of airport observations.
The radar
The North Platte radar (KLNX), 104 km away, was scanning. The volume nearest the touchdown began at 00:21 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.
This ground now
The live radar over the trackEvery 2003 tornado in NebraskaEvery tornado in Nebraska since 1950Warnings in force in Nebraska nowThe forecast where you are
The other tornadoes of June 9, 2003
20 more were confirmed in the United States that day.
| Date | Time | Rating | Where | Path (mi) | Width (yd) | Deaths | Injuries | Damage |
|---|---|---|---|---|---|---|---|---|
| June 9 | 4:18 PM MDT | F0 | Ziebach, SD | 0.1 | 10 | |||
| June 9 | 4:19 PM MDT | F0 | Utah, UT | 0.1 | 10 | $2,000 | ||
| June 9 | 5:58 PM CDT | F0 | Keya Paha, NE | 0.1 | 20 | |||
| June 9 | 6:30 PM CDT | F0 | Knox, NE | 0.1 | 40 | |||
| June 9 | 6:59 PM CDT | F0 | Custer, NE | 0.1 | 10 | |||
| June 9 | 7:05 PM CDT | F0 | Holt, NE | 2.0 | 30 | $10,000 | ||
| June 9 | 7:12 PM CDT | F0 | Holt, NE | 0.5 | 20 | $30,000 | ||
| June 9 | 7:15 PM CDT | F1 | Tripp, SD | 10.2 | 10 | $10,000 | ||
| June 9 | 7:30 PM CDT | F3 | Holt, NE | 23.0 | 880 | $5.7 million | ||
| June 9 | 7:35 PM CDT | F0 | Holt, NE | 0.1 | 20 | $10,000 | ||
| June 9 | 7:37 PM CDT | F0 | Cedar, NE | 0.0 | 40 | |||
| June 9 | 7:40 PM CDT | F1 | Custer, NE | 4.0 | 580 | $30,000 | ||
| June 9 | 7:40 PM CDT | F1 | Valley, NE | 3.0 | 300 | $250,000 | ||
| June 9 | 7:42 PM CDT | F0 | Gregory, SD | 0.1 | 50 | |||
| June 9 | 7:45 PM CDT | F0 | Graham, KS | 2.0 | 75 | |||
| June 9 | 8:02 PM CDT | F0 | Gregory, SD | 4.0 | 400 | |||
| June 9 | 8:12 PM CDT | F0 | Graham, KS | 1.0 | 20 | |||
| June 9 | 8:20 PM CDT | F0 | Woodbury, IA | 0.1 | 50 | |||
| June 9 | 8:22 PM CDT | F0 | Valley, NE | 0.2 | 25 | |||
| June 9 | 8:43 PM CDT | F0 | Antelope, NE | 5.0 | 100 |
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.