Alert archive / Texas / Mesoscale Discussions in 2005

Mesoscale Discussion 1012

May 25, 200515 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 25, 2005, 7:49 PM CDT for 15 counties in Texas. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: May 25, 2005, 7:49 PM CDT (00:49 UTC)
Expired: May 25, 2005, 9:15 PM CDT
In force: 86 min
Issued by: the Storm Prediction Center

Counties Callahan County, TX, Coke County, TX, Coleman County, TX, Concho County, TX, Glasscock County, TX, Irion County, TX, Midland County, TX, Mitchell County, TX, Nolan County, TX, Reagan County, TX, Runnels County, TX, Sterling County, TX, Taylor County, TX, Tom Green County, TX, Upton County, TX

The radar

The San Angelo radar (KSJT), 37 km from the middle of the area, began a volume at 00:53 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Midland Regional, TX (KMAF), launched 00:00Z, 0.8 hours before the alert went out and 153 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2438 J/kg
Mixed-layer CIN: -55 J/kg
Mixed-layer LCL: 2457 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 9 m²/s²
0-3 km storm-relative helicity: 143 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.3

Open this sounding in Storm Lab

The text

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

000 
ACUS11 KWNS 260049
SWOMCD
SPC MCD 260049 
TXZ000-260215-

MESOSCALE DISCUSSION 1012
NWS STORM PREDICTION CENTER NORMAN OK
0749 PM CDT WED MAY 25 2005

AREAS AFFECTED...WRN AND CNTRL TX

CONCERNING...SEVERE THUNDERSTORM WATCH 333...

VALID 260049Z - 260215Z

STORMS ARE CURRENTLY EXPANDING IN COVERAGE IN THE WRN PART OF WW
333. THE STRONGER CELLS WILL LIKELY HAVE A THREAT FOR LARGE HAIL AND
WIND DAMAGE.

SFC ANALYSIS SHOWS A FRONTAL BOUNDARY EXTENDING FROM SOUTH OF
MIDLAND TO NEAR SAN ANGELO WHERE STRONG LOW-LEVEL CONVERGENCE
EXISTS. A MOIST AXIS EXTENDS NWD ACROSS WCNTRL TX WITH SFC DEWPOINTS
IN THE 60S F WHICH COMBINED WITH THE HOT TEMPERATURES IS RESULTING
IN MODERATE INSTABILITY SOUTH OF THE FRONT. AS STORMS CONTINUE TO
INITIATE AND EXPAND IN COVERAGE...STEEP LAPSE RATES AND 0-6 KM SHEAR
VALUES WILL BE SUFFICIENT FOR SEVERE MULTICELL STORMS WITH LARGE
HAIL AND WIND DAMAGE. IR IMAGERY SHOWS COOLING TOPS WITH THE CLUSTER
OF STORMS OVER WCNTRL TX WHICH SUGGESTS AN MCS IS CURRENTLY
DEVELOPING OVER WCNTRL TX. THE MCS SHOULD MOVE SLOWLY SEWD INTO THE
TX HILL COUNTRY OVER THE NEXT 1-3 HOURS WITH A SEVERE THREAT
CONTINUING.

..BROYLES.. 05/26/2005

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

ATTN...WFO...FWD...SJT...MAF...

30870169 31259959 31619909 32039905 32479925 32639968
32280152 31870237 31040215

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 25, 8:14 PM CDT	Mesoscale Discussion	SPC	Bosque, Brazos, Burleson, Ellis, Erath, Falls and 15 more	91 min
May 25, 10:15 PM CDT	Severe Thunderstorm Watch	SPC	Brown, Burnet, Callahan, Coke, Coleman, Comanche and 27 more	7 hr
May 25, 11:40 PM CDT	Severe Thunderstorm Watch	SPC	Andrews, Dawson, Ector, Gaines, Glasscock, Martin and 2 more	5 hr
May 25, 11:46 PM CDT	Mesoscale Discussion	SPC	Andrews, Bosque, Brown, Callahan, Coke, Coleman and 31 more	89 min
May 26, 2:48 AM CDT	Mesoscale Discussion	SPC	Andrews, Dawson, Ector, Gaines, Glasscock, Martin and 1 more	57 min
May 26, 3:17 AM CDT	Mesoscale Discussion	SPC	Brown, Burnet, Callahan, Coke, Coleman, Comanche and 25 more	58 min
May 26, 7:45 AM CDT	Mesoscale Discussion	SPC	Crockett, Edwards, Kimble, Kinney, Real, Schleicher and 4 more	90 min
May 26, 8:40 AM CDT	Severe Thunderstorm Watch	SPC	Atascosa, Bandera, Bexar, Dimmit, Edwards, Frio and 14 more	5 hr
May 26, 11:35 AM CDT	Mesoscale Discussion	SPC	Kinney, Maverick	85 min

Nearby

Mesoscale Discussions in Texas, 2005 Every mesoscale discussion in 2005

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.