Alert archive / Texas / Mesoscale Discussions in 2015

Mesoscale Discussion 513

May 5, 201521 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 5, 2015, 7:41 PM CDT for 21 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 5, 2015, 7:41 PM CDT (00:41 UTC)
Expired
May 5, 2015, 9:45 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
40%
All 21 counties

Borden County, TX, Briscoe County, TX, Childress County, TX, Cottle County, TX, Crosby County, TX, Dickens County, TX, Fisher County, TX, Floyd County, TX, Foard County, TX, Garza County, TX, Glasscock County, TX, Hall County, TX, Howard County, TX, Kent County, TX, King County, TX, Knox County, TX, Mitchell County, TX, Motley County, TX, Nolan County, TX, Scurry County, TX, Stonewall County, TX

The radar

The Lubbock radar (KLBB), 81 km from the middle of the area, began a volume at 00:41 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, 0.7 hours before the alert went out and 171 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 2015-05-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 20 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, Midland Regional, TX at 00:00Z on 2015-05-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 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
20 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
2898 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
20 m²/s²
0-3 km storm-relative helicity
119 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 5, 8:07 PM CDTTornado WatchSPCCoke, Cottle, Crosby, Dickens, Fisher, Foard and 14 more4 hr
May 5, 9:56 PM CDTMesoscale DiscussionSPCBorden, Callahan, Coke, Cottle, Crosby, Dickens and 23 more94 min
May 6, 1:03 PM CDTMesoscale DiscussionSPCArcher, Baylor, Childress, Clay, Cottle, Dickens and 17 more117 min
May 6, 1:23 PM CDTTornado WatchSPCArcher, Baylor, Callahan, Clay, Eastland, Foard and 16 more8 hr
May 6, 1:46 PM CDTMesoscale DiscussionSPCBrown, Callahan, Coke, Coleman, Concho, Crockett and 22 more119 min
May 6, 3:00 PM CDTTornado WatchSPCBrown, Coke, Coleman, Concho, Crockett, Fisher and 12 more7 hr
May 6, 3:27 PM CDTMesoscale DiscussionSPCArcher, Baylor, Clay, Foard, Hardeman, Haskell and 8 more2 hr
May 6, 5:25 PM CDTMesoscale DiscussionSPCArcher, Baylor, Clay, Foard, Hardeman, Haskell and 13 more2 hr
May 6, 6:34 PM CDTMesoscale DiscussionSPCArcher, Baylor, Clay, Cooke, Foard, Hardeman and 13 more86 min

Nearby

Mesoscale Discussions in Texas, 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.