Alert archive / Texas / Mesoscale Discussions in 2015

Mesoscale Discussion 547

May 8, 201524 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 8, 2015, 2:48 PM CDT for 24 counties in Texas. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued
May 8, 2015, 2:48 PM CDT (19:48 UTC)
Expired
May 8, 2015, 4:15 PM CDT
In force
87 min
Issued by
the Storm Prediction Center
All 24 counties

Bailey County, TX, Borden County, TX, Cottle County, TX, Crosby County, TX, Dawson County, TX, Dickens County, TX, Fisher County, TX, Floyd County, TX, Foard County, TX, Garza County, TX, Hale County, TX, Haskell County, TX, Hockley County, TX, Jones County, TX, Kent County, TX, King County, TX, Knox County, TX, Lamb County, TX, Lubbock County, TX, Lynn County, TX, Motley County, TX, Scurry County, TX, Stonewall County, TX, Terry County, TX

The radar

The Lubbock radar (KLBB), 52 km from the middle of the area, began a volume at 19:51 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

Amarillo Airport, TX (KAMA), launched 12:00Z, 7.8 hours before the alert went out and 187 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, Amarillo Airport, TX at 12:00Z on 2015-05-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 107 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, Amarillo Airport, TX at 12:00Z on 2015-05-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -22 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
107 J/kg
Mixed-layer CIN
-347 J/kg
Mixed-layer LCL
1168 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
-22 m²/s²
0-3 km storm-relative helicity
-20 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.8

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 7, 8:49 PM CDTMesoscale DiscussionSPCBosque, Collin, Comanche, Dallas, Delta, Denton and 19 more86 min
May 7, 11:05 PM CDTMesoscale DiscussionSPCBosque, Collin, Comanche, Dallas, Delta, Ellis and 17 more85 min
May 8, 8:57 AM CDTMesoscale DiscussionSPCBailey, Briscoe, Castro, Childress, Cottle, Crosby and 18 more93 min
May 8, 9:31 AM CDTTornado WatchSPCAndrews, Armstrong, Bailey, Borden, Briscoe, Callahan and 40 more7 hr
May 8, 12:22 PM CDTMesoscale DiscussionSPCArcher, Baylor, Childress, Clay, Foard, Hardeman and 5 more83 min
May 8, 12:51 PM CDTTornado WatchSPCArcher, Baylor, Childress, Clay, Collingsworth, Cooke and 14 more8 hr
May 8, 2:12 PM CDTMesoscale DiscussionSPCArcher, Baylor, Childress, Clay, Cooke, Foard and 8 more93 min
May 8, 3:26 PM CDTMesoscale DiscussionSPCCoke, Crockett, Edwards, Glasscock, Irion, Kinney and 8 more94 min
May 8, 3:45 PM CDTMesoscale DiscussionSPCArcher, Baylor, Clay, Foard, Hardeman, Knox and 3 more90 min
May 8, 3:50 PM CDTTornado WatchSPCAndrews, Borden, Callahan, Coke, Crane, Crockett and 27 more8 hr
May 8, 5:15 PM CDTMesoscale DiscussionSPCBell, Brazos, Burleson, Falls, Freestone, Grimes and 8 more90 min
May 8, 6:13 PM CDTMesoscale DiscussionSPCBaylor, Borden, Callahan, Coke, Concho, Crane and 31 more2 hr
May 8, 6:50 PM CDTMesoscale DiscussionSPCArcher, Clay, Collin, Cooke, Dallas, Delta and 15 more85 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.