Alert archive / Texas / Mesoscale Discussions in 2013

Mesoscale Discussion 650

May 15, 2013Bryan County, Choctaw County, Oklahoma; 51 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 15, 2013, 9:02 PM CDT for Bryan County, Choctaw County, Oklahoma; 51 counties in Texas. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued
May 15, 2013, 9:02 PM CDT (02:02 UTC)
Expired
May 15, 2013, 10:30 PM CDT
In force
88 min
Issued by
the Storm Prediction Center
All 53 counties

Bryan County, OK, Choctaw County, OK, Anderson County, TX, Bell County, TX, Bosque County, TX, Brazos County, TX, Brown County, TX, Burleson County, TX, Clay County, TX, Collin County, TX, Comanche County, TX, Cooke County, TX, Coryell County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, Eastland County, TX, Ellis County, TX, Erath County, TX, Falls County, TX, Fannin County, TX, Franklin County, TX, Freestone County, TX, Grayson County, TX, Hamilton County, TX, Henderson County, TX, Hill County, TX, Hood County, TX, Hopkins County, TX, Hunt County, TX, Jack County, TX, Johnson County, TX, Kaufman County, TX, Lamar County, TX, Lampasas County, TX, Leon County, TX, Limestone County, TX, Madison County, TX, McLennan County, TX, Milam County, TX, Mills County, TX, Navarro County, TX, Palo Pinto County, TX, Parker County, TX, Rains County, TX, Red River County, TX, Robertson County, TX, Rockwall County, TX, Somervell County, TX, Tarrant County, TX, Van Zandt County, TX, Wise County, TX, Wood County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 34 km from the middle of the area, began a volume at 02:02 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, 2.0 hours before the alert went out and 28 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 2013-05-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1604 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, Fort Worth, TX at 00:00Z on 2013-05-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 244 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
1604 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
843 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
244 m²/s²
0-3 km storm-relative helicity
436 m²/s²
Significant tornado parameter
3.0
Supercell composite
20.6

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 15, 7:18 PM CDTMesoscale DiscussionSPCCoal, Comanche, Cotton, Garvin, Hughes, Jackson and 5 more57 min
May 16, 3:48 PM CDTMesoscale DiscussionSPCCimarron, Texas87 min
May 15, 7:40 PM CDTMesoscale DiscussionSPCBosque, Brown, Collin, Comanche, Cooke, Coryell and 13 more65 min
May 15, 11:28 PM CDTSevere Thunderstorm WatchSPCAnderson, Bastrop, Blanco, Brazos, Burleson, Burnet and 23 more5 hr
May 15, 11:39 PM CDTMesoscale DiscussionSPCBell, Bosque, Coryell, Dallas, Ellis, Hamilton and 11 more96 min
May 16, 1:26 AM CDTMesoscale DiscussionSPCAnderson, Angelina, Bell, Brazos, Burleson, Burnet and 21 more94 min
May 16, 3:21 AM CDTMesoscale DiscussionSPCBrazos, Burleson, Grimes, Lee, Madison, Milam and 1 more24 min
May 16, 12:07 PM CDTMesoscale DiscussionSPCHarrison, Marion83 min

Nearby

Mesoscale Discussions in Texas, 2013Mesoscale Discussions in Oklahoma, 2013Every mesoscale discussion in 2013

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.