Alert archive / Texas / Mesoscale Discussions in 2007

Mesoscale Discussion 751

May 7, 2007Lea County, New Mexico; 23 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 7, 2007, 10:43 PM MDT for Lea County, New Mexico; 23 counties in Texas. It was in force for 62 min.

The area

The outline as issued.

The facts

Issued
May 7, 2007, 10:43 PM MDT (04:43 UTC)
Expired
May 7, 2007, 11:45 PM MDT
In force
62 min
Issued by
the Storm Prediction Center
All 24 counties

Lea County, NM, Andrews County, TX, Borden County, TX, Cochran County, TX, Crosby County, TX, Dawson County, TX, Dickens County, TX, Duval County, TX, Floyd County, TX, Gaines County, TX, Garza County, TX, Hale County, TX, Hockley County, TX, Jim Wells County, TX, Kent County, TX, Lubbock County, TX, Lynn County, TX, Motley County, TX, Terrell County, TX, Terry County, TX, Ward County, TX, Webb County, TX, Winkler County, TX, Yoakum County, TX

The radar

The San Angelo radar (KSJT), 59 km from the middle of the area, began a volume at 04:44 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.

The nearest sounding before it

Midland Regional, TX (KMAF), launched 00:00Z, 4.7 hours before the alert went out and 142 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.

Skew-T log-pSkew-T log-p diagram, Midland Regional, TX at 00:00Z on 2007-05-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 468 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Midland Regional, TX at 00:00Z on 2007-05-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 21 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
468 J/kg
Mixed-layer CIN
-78 J/kg
Mixed-layer LCL
1301 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
21 m²/s²
0-3 km storm-relative helicity
114 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
ACUS11 KWNS 080443
SWOMCD
SPC MCD 080443 
TXZ000-NMZ000-080545-

MESOSCALE DISCUSSION 0751
NWS STORM PREDICTION CENTER NORMAN OK
1143 PM CDT MON MAY 07 2007

AREAS AFFECTED...SOUTH TX

CONCERNING...TORNADO WATCH 253...

VALID 080443Z - 080545Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 253 CONTINUES.

STRONG THUNDERSTORM CLUSTERS JUST WEST OF THE RIO GRANDE HAVE
FINALLY CONGEALED AND EVOLVED INTO A BOW ECHO.  THIS BOW IS NOW
SURGING EWD ACROSS WEBB/ZAPATA COUNTIES WITHIN MODERATE INSTABILITY
CHARACTERIZED BY STRONG ELY COMPONENT IN THE LOWEST 3 KM.  FORWARD
PROPAGATION MAY ALLOW THIS ACTIVITY TO APPROACH THE COAST LATER THIS
MORNING...THOUGH LIKELY IN A SOMEWHAT DEGRADED STATE.  IN THE SHORT
TERM...IT APPEARS SEVERE THREAT MAY SPREAD EAST OF ONGOING WATCH
INTO DUVAL AND MCMULLEN COUNTIES...JUST WEST OF THE CORPUS CRISTI
AREA.  WATCH MAY NEED TO BE EXTENDED LOCALLY TO ACCOUNT FOR THIS
SEVERE THREAT.

..DARROW.. 05/08/2007

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...LUB...MAF...CRP...BRO...

32900364 34320202 34360060 33320039 32460157 31770363 

28110016 28169807 27369775 26800004

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 7, 10:15 PM MDTMesoscale DiscussionSPCLea60 min
May 7, 6:15 PM MDTMesoscale DiscussionSPCCollin, Cooke, Delta, Fannin, Franklin, Grayson and 6 more60 min
May 7, 6:32 PM MDTTornado WatchSPCCamp, Clay, Collin, Cooke, Delta, Denton and 15 more7 hr
May 7, 7:37 PM MDTSevere Thunderstorm WatchSPCAndrews, Borden, Briscoe, Childress, Coke, Cottle and 38 more7 hr
May 7, 8:23 PM MDTMesoscale DiscussionSPCBandera, Dimmit, Edwards, Frio, Kerr, Kinney and 8 more67 min
May 7, 8:45 PM MDTMesoscale DiscussionSPCCamp, Clay, Collin, Cooke, Delta, Denton and 15 more60 min
May 8, 10:19 AM MDTMesoscale DiscussionSPCBorden, Callahan, Coke, Crane, Ector, Fisher and 20 more116 min
May 8, 11:01 AM MDTTornado WatchSPCAndrews, Borden, Brewster, Coke, Crane, Crockett and 27 more7 hr
May 8, 1:44 PM MDTMesoscale DiscussionSPCCoke, Crockett, Fisher, Glasscock, Irion, Mitchell and 6 more91 min
May 8, 1:46 PM MDTMesoscale DiscussionSPCArcher, Baylor, Bosque, Brown, Callahan, Clay and 33 more2 hr
May 8, 2:41 PM MDTSevere Thunderstorm WatchSPCArcher, Baylor, Brown, Callahan, Clay, Coleman and 28 more6 hr
May 8, 4:09 PM MDTMesoscale DiscussionSPCArcher, Baylor, Clay, Hardeman, Jack, Jones and 8 more96 min
May 8, 4:29 PM MDTTornado WatchSPCArcher, Baylor, Clay, Haskell, Jack, Montague and 8 more5 hr
May 8, 5:13 PM MDTMesoscale DiscussionSPCBandera, Edwards, Kerr, Kinney, Medina, Real and 2 more62 min
May 8, 5:58 PM MDTSevere Thunderstorm WatchSPCBandera, Dimmit, Edwards, Gillespie, Kendall, Kerr and 8 more4 hr

Nearby

Mesoscale Discussions in Texas, 2007Mesoscale Discussions in New Mexico, 2007Every mesoscale discussion 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.