Alert archive / Oklahoma / Mesoscale Discussions in 2015

Mesoscale Discussion 701

May 19, 201519 counties in Oklahoma; 12 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 19, 2015, 5:31 PM CDT for 19 counties in Oklahoma; 12 counties in Texas. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued
May 19, 2015, 5:31 PM CDT (22:31 UTC)
Expired
May 19, 2015, 7:00 PM CDT
In force
89 min
Issued by
the Storm Prediction Center
All 31 counties

Caddo County, OK, Carter County, OK, Cleveland County, OK, Comanche County, OK, Cotton County, OK, Garvin County, OK, Grady County, OK, Jackson County, OK, Jefferson County, OK, Kiowa County, OK, Love County, OK, Marshall County, OK, McClain County, OK, Murray County, OK, Pontotoc County, OK, Pottawatomie County, OK, Seminole County, OK, Stephens County, OK, Tillman County, OK, Archer County, TX, Baylor County, TX, Clay County, TX, Cooke County, TX, Foard County, TX, Hardeman County, TX, Jack County, TX, Montague County, TX, Throckmorton County, TX, Wichita County, TX, Wilbarger County, TX, Young County, TX

The radar

The Altus AFB radar (KFDR), 63 km from the middle of the area, began a volume at 22:35 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

Norman, OK (KOUN), launched 12:00Z, 10.5 hours before the alert went out and 156 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, Norman, OK at 12:00Z on 2015-05-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 35 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, Norman, OK at 12:00Z on 2015-05-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 121 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
35 J/kg
Mixed-layer CIN
-161 J/kg
Mixed-layer LCL
634 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
121 m²/s²
0-3 km storm-relative helicity
203 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

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 19, 1:02 PM CDTMesoscale DiscussionSPCComanche, Cotton, Jackson, Jefferson, Stephens, Tillman118 min
May 19, 1:32 PM CDTTornado WatchSPCAtoka, Bryan, Caddo, Carter, Cleveland, Coal and 20 more7 hr
May 19, 3:51 PM CDTMesoscale DiscussionSPCCarter, Comanche, Cotton, Garvin, Grady, Jackson and 9 more114 min
May 18, 8:00 PM CDTMesoscale DiscussionSPCBell, Blanco, Burnet, Concho, Coryell, Crockett and 12 more2 hr
May 18, 9:01 PM CDTMesoscale DiscussionSPCAndrews, Cochran, Crane, Crockett, Ector, Gaines and 12 more89 min
May 19, 12:53 AM CDTMesoscale DiscussionSPCBailey, Cochran, Parmer97 min
May 19, 2:15 AM CDTMesoscale DiscussionSPCCrockett, Irion, Reagan, Schleicher, Sutton, Tom Green90 min
May 19, 5:13 AM CDTMesoscale DiscussionSPCArmstrong, Bailey, Briscoe, Carson, Castro, Cochran and 16 more92 min
May 19, 2:30 PM CDTMesoscale DiscussionSPCBell, Bosque, Brown, Callahan, Coleman, Collin and 34 more60 min
May 19, 3:33 PM CDTMesoscale DiscussionSPCArmstrong, Borden, Briscoe, Carson, Castro, Childress and 27 more117 min
May 19, 5:56 PM CDTTornado WatchSPCComanche, Cooke, Denton, Eastland, Erath, Hood and 7 more6 hr

Nearby

Mesoscale Discussions in Oklahoma, 2015Mesoscale 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.