Alert archive / Texas / Mesoscale Discussions in 2005

Mesoscale Discussion 1017

May 26, 200510 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 26, 2005, 7:45 AM CDT for 10 counties in Texas. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: May 26, 2005, 7:45 AM CDT (12:45 UTC)
Expired: May 26, 2005, 9:15 AM CDT
In force: 90 min
Issued by: the Storm Prediction Center

Counties Crockett County, TX, Edwards County, TX, Kimble County, TX, Kinney County, TX, Real County, TX, Schleicher County, TX, Sutton County, TX, Terrell County, TX, Uvalde County, TX, Val Verde County, TX

The radar

The Laughlin AFB radar (KDFX), 138 km from the middle of the area, began a volume at 12:45 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.

Severe Thunderstorm Watch 336May 26, 8:40 AM CDT

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 0.8 hours before the alert went out and 100 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: 1261 J/kg
Mixed-layer CIN: -169 J/kg
Mixed-layer LCL: 953 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 13 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

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

000 
ACUS11 KWNS 261245
SWOMCD
SPC MCD 261245 
TXZ000-261415-

MESOSCALE DISCUSSION 1017
NWS STORM PREDICTION CENTER NORMAN OK
0745 AM CDT THU MAY 26 2005

AREAS AFFECTED...EDWARDS PLATEAU INTO THE HILL COUNTRY

CONCERNING...SEVERE THUNDERSTORM POTENTIAL 

VALID 261245Z - 261415Z

ONGOING TSTMS WILL LIKELY INTENSIFY THIS MORNING WITH AN INCREASING
THREAT OF DAMAGING WINDS AND LARGE HAIL. A WW MAY BECOME NECESSARY
LATER THIS MORNING.

AS OF 1237Z...REGIONAL RADAR IMAGERY SHOWED A CLUSTER OF STRONG
TSTMS OVER PECOS...TERRELL...UPTON AND CROCKETT COUNTIES MOVING SEWD
AT 20-30 KTS. 12Z DRT SOUNDING INDICATED THAT DOWNSTREAM AIR MASS IS
ALREADY MODERATELY UNSTABLE WITH MUCAPES OF 2000-2500 J/KG. AS
BOUNDARY-LAYER WARMS THIS MORNING...ONGOING STORMS WILL LIKELY
INTENSIFY AS THEY BECOME ROOTED IN THE BOUNDARY-LAYER. THOUGH
VERTICAL SHEAR PROFILES ARE NOT PARTICULARLY STRONG...POTENTIAL FOR
COLD POOL ORGANIZATION AND SUBSEQUENT FORWARD-PROPAGATION SUGGEST AN
INCREASED LIKLIHOOD FOR DAMAGING WINDS...IN ADDITION TO LARGE HAIL.

CONVECTIVE TRENDS ARE BEING MONITORED AND A WW MAY BE REQUIRED IN
THE NEXT 1-3 HOURS.

..MEAD.. 05/26/2005

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

ATTN...WFO...EWX...SJT...MAF...

30890250 31370166 30549953 29359938 28870030 29750151
29930250

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 25, 7:49 PM CDT	Mesoscale Discussion	SPC	Callahan, Coke, Coleman, Concho, Glasscock, Irion and 9 more	86 min
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, 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.