Tornadoes · United States · Texas · 2007
EF0 tornado, Callan to Calf Creek, Texas, May 9, 2007
From Callan to Calf Creek, this EF0 tornado ran 1.5 miles across Menard and McCulloch counties on May 9, 2007, touching down at 6:12 PM CDT and reaching 40 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, 2007
- Touchdown
- 6:12 PM CDT (23:12 UTC)
- Lifted
- 6:18 PM CDT (23:18 UTC)
- On the ground
- 6 minutes
- Path length
- 1.5 miles (2.4 km)
- Path width
- 40 yards (37 m)
- Deaths
- 0
- Injuries
- 0
- Counties
- Menard and McCulloch counties
- Touchdown point
- 30.981, -99.619
- Lift-off point
- 31.017, -99.584
- Record number
- 0705091712-01
What the Weather Service recorded
Severe thunderstorms developed in the afternoon. The thunderstorms affected the Northern Edwards Plateau, the Heartland and the Northwest Hill Country. Another isolated supercell developed in Throckmorton County and produced another tornado. There were other tornadoes reported with the southern storms across the Edwards Plateau and the Northwest Hill Country.
A tornado was reported near the McCulloch County line. The twister remained over open fields. This tornado crossed into McCulloch County.
A tornado crossed over from Menard County and remained in open fields.
From NOAA NCEI's Storm Events Database, the narrative the local forecast office wrote for Storm Data.
The warnings
19 minutes of warning. NWS SJT issued a tornado warning for this county at 22:53 UTC, 19 minutes before the tornado touched down, in force until 23:45 UTC.
The county was under a tornado watch, issued at 20:32 UTC and running to 01:13 UTC.
| Issued (UTC) | Expired | Product | Office |
|---|---|---|---|
| 20:32 UTC | 01:13 UTC | Tornado Watch | SJT |
| 21:56 UTC | 23:00 UTC | Severe Thunderstorm Warning | SJT |
| 22:20 UTC | 23:00 UTC | Tornado Warning | SJT |
| 22:53 UTC | 23:45 UTC | Tornado Warning | SJT |
| 23:06 UTC | 05:00 UTC | Flash Flood Warning | SJT |
| 23:17 UTC | 00:00 UTC | Tornado Warning | SJT |
| 23:38 UTC | 03:30 UTC | Flash Flood Warning | SJT |
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 22:19 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.
Del Rio, TX (KDRT), 12:00Z
11.2 hours before the tornado, 217 km from the path. May 9, 2007.
- Mixed-layer CAPE
- 69 J/kg
- Mixed-layer CIN
- -193 J/kg
- Surface CAPE
- 309 J/kg
- Mixed-layer LCL
- 687 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 36 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
- 0-3 km lapse rate
- 5.3 K/km
The surface observations
Brady (BBD), 33 km from the path, in the two hours either side.
| Time (UTC) | Temp (°F) | Dew point (°F) | Wind | Gust (kt) | Pressure (mb) | Weather |
|---|---|---|---|---|---|---|
| 21:25 UTC | 71.6 | 62.6 | 120° 3 kt | 1014.9 | -RA | |
| 21:45 UTC | 71.6 | 62.6 | 140° 3 kt | 1014.9 | ||
| 22:05 UTC | 71.6 | 64.4 | 140° 3 kt | 1014.6 | ||
| 22:25 UTC | 71.6 | 62.6 | 80° 4 kt | 1013.5 | ||
| 22:45 UTC | 71.6 | 62.6 | 50° 5 kt | 1013.5 | ||
| 23:05 UTC | 71.6 | 64.4 | 40° 5 kt | 1013.2 | ||
| 23:25 UTC | 69.8 | 64.4 | 60° 4 kt | 1013.9 | ||
| 23:45 UTC | 69.8 | 66.2 | 280° 7 kt | 1014.9 | -RA | |
| 00:05 UTC | 60.8 | 59 | 260° 15 kt | 1015.6 | +RA | |
| 00:25 UTC | 60.8 | 59 | 300° 24 kt | 30 | 1015.9 | RA BR |
| 00:45 UTC | 60.8 | 59 | 310° 20 kt | 1015.2 | +RA BR | |
| 01:05 UTC | 60.8 | 60.8 | 330° 10 kt | 1015.6 | RA BR |
From the Iowa Environmental Mesonet's archive of airport observations.
The radar
The San Angelo radar (KSJT), 94 km away, was scanning. The volume nearest the touchdown began at 23:17 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 |
|---|---|---|---|---|
| 23:12 UTC | TORNADO | 10 Nnw Hext | Menard, TX | LAW ENFORECEMENT REPORTED A TORNADO NEAR THE MCCULLOCH COUNTY LINE |
| 23:40 UTC | FLOOD | 5 Ene Fort Mckavett | Menard, TX | HIGHWAY 864 CLOSED ABOUT 1/2 MILE SOUTH OF U.S. 190. |
| 23:40 UTC | FLASH FLOOD | 5 Ene Fort Mckavett | Menard, TX | HIGHWAY 864 CLOSED ABOUT 1/2 MILE SOUTH OF U.S. 190. |
| 23:55 UTC | HAIL 1 | Voca | Mcculloch, TX | |
| 00:15 UTC | FLASH FLOOD | Brady | Mcculloch, TX | LOCAL EMERGENCY MANAGEMENT REPORTED FLOODING OF STREETS IN BRADY. OFFICIALS HAVE CLOSED PORTIONS OF SOUTH BLACKBURN AND SOUTH ELM STREETS IN BRADY |
From the Iowa Environmental Mesonet's archive of National Weather Service local storm reports.
This ground now
The live radar over the trackEvery 2007 tornado in TexasEvery tornado in Texas since 1950Warnings in force in Texas nowThe forecast where you are
The other tornadoes of May 9, 2007
2 more were confirmed in the United States that day.
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.