Alert archive / Texas / Mesoscale Discussions in 2015

Mesoscale Discussion 832

May 28, 20155 counties in Oklahoma; 74 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 28, 2015, 9:58 PM CDT for 5 counties in Oklahoma; 74 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 28, 2015, 9:58 PM CDT (02:58 UTC)
Expired
May 29, 2015, 12:00 AM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 79 counties

Atoka County, OK, Bryan County, OK, Choctaw County, OK, Johnston County, OK, Marshall County, OK, Atascosa County, TX, Bandera County, TX, Bastrop County, TX, Bee County, TX, Bell County, TX, Bexar County, TX, Blanco County, TX, Bosque County, TX, Burleson County, TX, Burnet County, TX, Caldwell County, TX, Collin County, TX, Comal County, TX, Coryell County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, DeWitt County, TX, Dimmit County, TX, Edwards County, TX, Ellis County, TX, Falls County, TX, Fannin County, TX, Fayette County, TX, Freestone County, TX, Frio County, TX, Gillespie County, TX, Gonzales County, TX, Grayson County, TX, Guadalupe County, TX, Hamilton County, TX, Hays County, TX, Henderson County, TX, Hill County, TX, Hood County, TX, Hopkins County, TX, Hunt County, TX, Johnson County, TX, Karnes County, TX, Kaufman County, TX, Kendall County, TX, Kerr County, TX, Kimble County, TX, Kinney County, TX, La Salle County, TX, Lamar County, TX, Lampasas County, TX, Lee County, TX, Limestone County, TX, Live Oak County, TX, Llano County, TX, Mason County, TX, Maverick County, TX, McLennan County, TX, McMullen County, TX, Medina County, TX, Milam County, TX, Mills County, TX, Navarro County, TX, Rains County, TX, Real County, TX, Robertson County, TX, Rockwall County, TX, San Saba County, TX, Somervell County, TX, Tarrant County, TX, Travis County, TX, Uvalde County, TX, Val Verde County, TX, Van Zandt County, TX, Webb County, TX, Williamson County, TX, Wilson County, TX, Zavala County, TX

The radar

The Ft Hood radar (KGRK), 117 km from the middle of the area, began a volume at 02:59 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

Fort Worth, TX (KFWD), launched 00:00Z, 3.0 hours before the alert went out and 211 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, Fort Worth, TX at 00:00Z on 2015-05-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2936 joules per kilogram.LCLEL10008507005003002001001 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, Fort Worth, TX at 00:00Z on 2015-05-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 68 square meters per square second.193958Sfc1 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
2936 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
1201 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
68 m²/s²
0-3 km storm-relative helicity
124 m²/s²
Significant tornado parameter
1.3
Supercell composite
11.8

Open this sounding in Storm Lab

The text

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

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 29, 12:33 PM CDTMesoscale DiscussionSPCLeFlore, McCurtain87 min
May 29, 2:09 PM CDTTornado WatchSPCAdair, Cherokee, Craig, Delaware, Haskell, Latimer and 7 more5 hr
May 29, 2:27 PM CDTMesoscale DiscussionSPCCimarron93 min
May 29, 3:44 PM CDTSevere Thunderstorm WatchSPCCimarron7 hr
May 29, 4:48 PM CDTMesoscale DiscussionSPCAdair, Choctaw, Latimer, LeFlore, McCurtain, Pushmataha and 1 more87 min
May 28, 7:58 PM CDTSevere Thunderstorm WatchSPCBandera, Blanco, Coleman, Concho, Crockett, Edwards and 16 more5 hr
May 28, 10:19 PM CDTSevere Thunderstorm WatchSPCAtascosa, Bastrop, Bexar, Burnet, Caldwell, Comal and 20 more7 hr
May 29, 1:22 AM CDTMesoscale DiscussionSPCAtascosa, Bee, Brooks, Dimmit, Duval, Hidalgo and 12 more83 min

Nearby

Mesoscale Discussions in Texas, 2015Mesoscale Discussions in Oklahoma, 2015Every mesoscale discussion in 2015

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.