Alert archive / Texas / Tornado Watches in 2007
Tornado Watch 249
The Storm Prediction Center issued this tornado watch at May 6, 2007, 7:55 PM CDT for 19 counties in Texas. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- May 6, 2007, 7:55 PM CDT (00:55 UTC)
- Expired
- May 7, 2007, 2:00 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 60 kt
Counties Coke County, TX, Coleman County, TX, Concho County, TX, Crockett County, TX, Glasscock County, TX, Howard County, TX, Irion County, TX, McCulloch County, TX, Mitchell County, TX, Pecos County, TX, Reagan County, TX, Runnels County, TX, Schleicher County, TX, Sterling County, TX, Sutton County, TX, Terrell County, TX, Tom Green County, TX, Upton County, TX, Val Verde County, TX
The radar
The San Angelo radar (KSJT), 117 km from the middle of the area, began a volume at 00:55 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
- 30%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 20%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 60%
Warnings issued inside it
25 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 6, 8:00 PM CDT | Severe Thunderstorm Warning | MAF | Reagan | 60 min |
| May 6, 8:15 PM CDT | Severe Thunderstorm Warning | SJT | Irion | 45 min |
| May 6, 8:30 PM CDT | Severe Thunderstorm Warning | MAF | Pecos | 60 min |
| May 6, 8:30 PM CDT | Tornado Warning | MAF | Reagan | 45 min |
| May 6, 8:51 PM CDT | Severe Thunderstorm Warning | SJT | Tom Green | 54 min |
| May 6, 9:09 PM CDT | Severe Thunderstorm Warning | SJT | Coke, Runnels | 51 min |
| May 6, 9:21 PM CDT | Severe Thunderstorm Warning | SJT | Crockett, Irion | 39 min |
| May 6, 9:24 PM CDT | Flash Flood Warning | MAF | Pecos | 3 hr |
| May 6, 9:24 PM CDT | Tornado Warning | MAF | Pecos | 51 min |
| May 6, 9:46 PM CDT | Severe Thunderstorm Warning | SJT | Runnels | 44 min |
| May 6, 9:52 PM CDT | Flash Flood Warning | SJT | Coke | 4 hr |
| May 6, 10:11 PM CDT | Severe Thunderstorm Warning | MAF | Terrell | 64 min |
| May 6, 10:13 PM CDT | Severe Thunderstorm Warning | MAF | Pecos | 62 min |
| May 6, 10:30 PM CDT | Severe Thunderstorm Warning | SJT | Crockett | 60 min |
| May 6, 10:37 PM CDT | Severe Thunderstorm Warning | SJT | Coleman, Concho, Runnels | 53 min |
| May 6, 10:55 PM CDT | Flash Flood Warning | MAF | Reagan | 3 hr |
| May 6, 11:15 PM CDT | Severe Thunderstorm Warning | MAF | Pecos | 46 min |
| May 6, 11:24 PM CDT | Severe Thunderstorm Warning | MAF | Terrell | 66 min |
| May 6, 11:29 PM CDT | Tornado Warning | SJT | Crockett | 61 min |
| May 6, 11:56 PM CDT | Severe Thunderstorm Warning | MAF | Reagan | 49 min |
| May 6, 11:58 PM CDT | Severe Thunderstorm Warning | SJT | Crockett | 62 min |
| May 7, 12:07 AM CDT | Tornado Warning | SJT | Irion | 38 min |
| May 7, 12:25 AM CDT | Flash Flood Warning | MAF | Pecos | 3 hr |
| May 7, 12:48 AM CDT | Severe Thunderstorm Warning | SJT | Irion, Tom Green | 57 min |
| May 7, 1:51 AM CDT | Severe Thunderstorm Warning | MAF | Terrell | 54 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
Midland Regional, TX (KMAF), launched 00:00Z, 0.9 hours before the alert went out and 130 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
- 3064 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 9 m²/s²
- 0-3 km storm-relative helicity
- 133 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 070056
SEL9
SPC WW 070056
TXZ000-070700-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 249
NWS STORM PREDICTION CENTER NORMAN OK
755 PM CDT SUN MAY 6 2007
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
SOUTHWEST TEXAS
EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 755 PM UNTIL
200 AM CDT.
TORNADOES...HAIL TO 2.5 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 60 STATUTE
MILES EAST AND WEST OF A LINE FROM 30 MILES EAST SOUTHEAST OF
DRYDEN TEXAS TO 40 MILES EAST NORTHEAST OF BIG SPRING TEXAS. FOR
A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU9).
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 246...WW 247...WW 248...
DISCUSSION...TSTM CLUSTER WITH EMBEDDED SUPERCELLS EXPECTED TO
DEVELOP MAINLY WSW ALONG EXISTING SW TX CONFLUENCE ZONE. SELY
NEAR-SFC FLOW WILL MAINTAIN RICH MOISTURE FEED...WITH 40 KT SWLY MID
LEVEL WINDS SUPPORTING ADDITIONAL SUSTAINED UPDRAFTS. DEGREE OF
CAPE AND MOISTURE AVAILABILITY SUGGEST POTENTIAL FOR ISOLATED
TORNADOES IN ADDITION TO LARGE HAIL/HIGH WIND.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
550. MEAN STORM MOTION VECTOR 07015.
...CORFIDISPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 6, 7:04 PM CDT | Mesoscale Discussion | SPC | Crockett, Irion, Reagan, Terrell, Upton | 56 min |
| May 6, 10:20 PM CDT | Mesoscale Discussion | SPC | Concho, Irion, Reagan, Tom Green | 55 min |
| May 6, 11:04 PM CDT | Mesoscale Discussion | SPC | Archer, Clay, Cooke, Fannin, Grayson, Lamar and 3 more | 56 min |
| May 6, 11:54 PM CDT | Tornado Watch | SPC | Archer, Baylor, Clay, Wichita, Wilbarger | 5 hr |
| May 7, 4:30 AM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Clay, Wichita, Wilbarger | 30 min |
| May 7, 10:29 AM CDT | Mesoscale Discussion | SPC | Collin, Cooke, Denton, Fannin, Grayson, Jack and 4 more | 2 hr |
| May 7, 10:51 AM CDT | Tornado Watch | SPC | Collin, Cooke, Denton, Fannin, Grayson, Lamar and 2 more | 5 hr |
| May 7, 1:14 PM CDT | Mesoscale Discussion | SPC | Crockett, Edwards, Irion, Kimble, Kinney, Menard and 6 more | 61 min |
| May 7, 1:59 PM CDT | Mesoscale Discussion | SPC | Crockett, Edwards, Irion, Kimble, Kinney, Menard and 6 more | 61 min |
| May 7, 5:38 PM CDT | Mesoscale Discussion | SPC | Dimmit, Kinney, Maverick, Uvalde, Zavala | 67 min |
| May 7, 5:59 PM CDT | Tornado Watch | SPC | Bandera, Dimmit, Edwards, Frio, Kerr, Kinney and 8 more | 8 hr |
| May 7, 6:19 PM CDT | Mesoscale Discussion | SPC | Brewster, Crane, Ector, Jeff Davis, Midland, Pecos and 7 more | 86 min |
| May 7, 6:42 PM CDT | Tornado Watch | SPC | Brewster, Jeff Davis, Pecos, Presidio, Reeves, Terrell | 5 hr |
Nearby
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.