Alert archive / Texas / Tornado Watches in 2007
Tornado Watch 238
The Storm Prediction Center issued this tornado watch at May 5, 2007, 7:48 PM CDT for Comanche County, Jackson County, Tillman County, Oklahoma; 28 counties in Texas. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- May 5, 2007, 7:48 PM CDT (00:48 UTC)
- Expired
- May 6, 2007, 3:00 AM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 3 in
- Strongest gust expected
- 60 kt
All 31 counties
Comanche County, OK, Jackson County, OK, Tillman County, OK, Andrews County, TX, Borden County, TX, Briscoe County, TX, Childress County, TX, Cottle County, TX, Crosby County, TX, Dawson County, TX, Dickens County, TX, Ector County, TX, Floyd County, TX, Foard County, TX, Garza County, TX, Glasscock County, TX, Hall County, TX, Hardeman County, TX, Howard County, TX, Kent County, TX, King County, TX, Knox County, TX, Lubbock County, TX, Lynn County, TX, Martin County, TX, Midland County, TX, Mitchell County, TX, Motley County, TX, Scurry County, TX, Stonewall County, TX, Wilbarger County, TX
The radar
The Lubbock radar (KLBB), 74 km from the middle of the area, began a volume at 00:50 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 40%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 40%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
5 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 5, 8:54 PM CDT | Severe Thunderstorm Warning | MAF | Dawson | 36 min |
| May 5, 9:12 PM CDT | Severe Thunderstorm Warning | LUB | Lynn | 48 min |
| May 5, 10:54 PM CDT | Severe Thunderstorm Warning | LUB | Briscoe, Floyd, Hale, Swisher | 51 min |
| May 5, 11:32 PM CDT | Severe Thunderstorm Warning | LUB | Briscoe, Swisher | 43 min |
| May 6, 12:16 AM CDT | Severe Thunderstorm Warning | LUB | Briscoe | 29 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Amarillo Airport, TX (KAMA), launched 00:00Z, 0.8 hours before the alert went out and 193 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3236 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 84 m²/s²
- 0-3 km storm-relative helicity
- 157 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 060052
SEL8
SPC WW 060052
OKZ000-TXZ000-060800-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 238
NWS STORM PREDICTION CENTER NORMAN OK
750 PM CDT SAT MAY 5 2007
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
SOUTHWEST OKLAHOMA
WESTERN AND NORTHWEST TEXAS
EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 750 PM
UNTIL 300 AM CDT.
TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 55 STATUTE
MILES EAST AND WEST OF A LINE FROM 25 MILES NORTH NORTHEAST OF
CHILDRESS TEXAS TO 20 MILES EAST SOUTHEAST OF MIDLAND TEXAS. FOR
A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU8).
REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.
OTHER WATCH INFORMATION...CONTINUE...WW 232...WW 234...WW
235...WW 236...WW 237...
DISCUSSION...ISOLATED STORMS APPEAR TO BE FORMING INVOF ERN-MOST DRY
LINE IN W TX. AREA SFC DATA SHOW VERY RICH MOISTURE IN PLACE E OF
LINE WITH SUBSTANTIAL SELY COMPONENT. COUPLED WITH EXISTING 40-50
KT DEEP WSWLY SHEAR...NOCTURNAL STRENGTHENING OF LLJ...AND A
POSSIBLE INCREASE IN LARGE SCALE ASCENT AHEAD OF SLOWLY PROGRESSIVE
AZ TROUGH...SETUP MAY SUPPORT A FEW SUPERCELLS WITH VERY LARGE HAIL
AND TORNADOES.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
550. MEAN STORM MOTION VECTOR 22030.
...CORFIDISPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 5, 7:34 PM CDT | Mesoscale Discussion | SPC | Tillman | 56 min |
| May 5, 9:58 PM CDT | Tornado Watch | SPC | Alfalfa, Beaver, Beckham, Blaine, Custer, Dewey and 12 more | 7 hr |
| May 5, 11:24 PM CDT | Mesoscale Discussion | SPC | Beaver, Ellis, Harper, Roger Mills, Woods, Woodward | 66 min |
| May 6, 3:37 AM CDT | Mesoscale Discussion | SPC | Alfalfa, Beckham, Blaine, Custer, Dewey, Ellis and 9 more | 53 min |
| May 6, 7:50 AM CDT | Mesoscale Discussion | SPC | Alfalfa, Beckham, Custer, Dewey, Greer, Harmon and 4 more | 85 min |
| May 6, 9:19 AM CDT | Tornado Watch | SPC | Alfalfa, Beckham, Blaine, Caddo, Canadian, Cleveland and 37 more | 5 hr |
| May 6, 11:41 AM CDT | Mesoscale Discussion | SPC | Alfalfa, Beckham, Blaine, Caddo, Canadian, Cherokee and 43 more | 94 min |
| May 6, 1:47 PM CDT | Mesoscale Discussion | SPC | Beckham, Ellis, Greer, Harmon, Harper, Jackson and 3 more | 58 min |
| May 6, 1:59 PM CDT | Tornado Watch | SPC | Alfalfa, Beaver, Beckham, Blaine, Caddo, Canadian and 36 more | 8 hr |
| May 6, 2:36 PM CDT | Tornado Watch | SPC | Brown, Callahan, Coke, Coleman, Concho, Crockett and 23 more | 7 hr |
Nearby
Tornado Watches in Texas, 2007Tornado Watches in Oklahoma, 2007Every tornado watch in 2007
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.