Alert archive / Oklahoma / Mesoscale Discussions in 2013

Mesoscale Discussion 349

March 31, 201329 counties in Oklahoma; Wheeler County, Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 31, 2013, 1:13 AM CDT for 29 counties in Oklahoma; Wheeler County, Texas. It was in force for 62 min.

The area

The outline as issued.

The facts

Issued
Mar 31, 2013, 1:13 AM CDT (06:13 UTC)
Expired
Mar 31, 2013, 2:15 AM CDT
In force
62 min
Issued by
the Storm Prediction Center
Chance of a watch
40%
All 30 counties

Beckham County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Carter County, OK, Cleveland County, OK, Comanche County, OK, Cotton County, OK, Custer County, OK, Garvin County, OK, Grady County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Jefferson County, OK, Johnston County, OK, Kiowa County, OK, Love County, OK, Marshall County, OK, McClain County, OK, Murray County, OK, Oklahoma County, OK, Pontotoc County, OK, Pottawatomie County, OK, Roger Mills County, OK, Seminole County, OK, Stephens County, OK, Tillman County, OK, Washita County, OK, Wheeler County, TX

The radar

The Altus AFB radar (KFDR), 94 km from the middle of the area, began a volume at 06:12 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

Lamont, OK (KLMN), launched 00:00Z, 6.2 hours before the alert went out and 191 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, Lamont, OK at 00:00Z on 2013-03-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 354 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, Lamont, OK at 00:00Z on 2013-03-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 14 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
354 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
2229 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
14 m²/s²
0-3 km storm-relative helicity
120 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

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
Mar 30, 7:37 PM CDTMesoscale DiscussionSPCAdair, Cherokee, Craig, Creek, Delaware, McIntosh and 9 more53 min
Mar 30, 8:14 PM CDTMesoscale DiscussionSPCAtoka, Carter, Cleveland, Coal, Comanche, Cotton and 17 more91 min
Mar 30, 9:06 PM CDTSevere Thunderstorm WatchSPCAdair, Cherokee, Choctaw, Craig, Creek, Delaware and 16 more5 hr
Mar 30, 10:44 PM CDTMesoscale DiscussionSPCAdair, Atoka, Cherokee, Coal, Haskell, Latimer and 6 more91 min
Mar 31, 4:54 AM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Choctaw, Coal, Comanche and 12 more96 min
Mar 31, 5:10 AM CDTSevere Thunderstorm WatchSPCAtoka, Bryan, Carter, Choctaw, Coal, Cotton and 13 more7 hr
Mar 31, 7:36 AM CDTMesoscale DiscussionSPCChoctaw, McCurtain114 min
Mar 31, 9:20 AM CDTSevere Thunderstorm WatchSPCAngelina, Sabine, San Augustine5 hr
Mar 31, 10:33 AM CDTMesoscale DiscussionSPCAnderson, Cherokee, Gregg, Harrison, Nacogdoches, Panola and 2 more57 min
Mar 31, 11:54 AM CDTMesoscale DiscussionSPCAngelina, Jasper, Newton, Sabine, San Augustine, Shelby and 1 more36 min
Mar 31, 12:17 PM CDTSevere Thunderstorm WatchSPCAngelina, Hardin, Houston, Jasper, Newton, Polk and 5 more6 hr
Mar 31, 1:00 PM CDTMesoscale DiscussionSPCAustin, Bandera, Bastrop, Bexar, Blanco, Brazos and 32 more60 min
Mar 31, 1:17 PM CDTSevere Thunderstorm WatchSPCAtascosa, Austin, Bandera, Bastrop, Bell, Bexar and 47 more9 hr
Mar 31, 2:32 PM CDTMesoscale DiscussionSPCAngelina, Hardin, Jasper, Liberty, Nacogdoches, Newton and 8 more58 min
Mar 31, 2:48 PM CDTSevere Thunderstorm WatchSPCBrazoria, Chambers, Colorado, Fort Bend, Galveston, Harris and 4 more5 hr
Mar 31, 5:24 PM CDTMesoscale DiscussionSPCAtascosa, Brazoria, Chambers, DeWitt, Dimmit, Fort Bend and 18 more96 min
Mar 31, 6:20 PM CDTSevere Thunderstorm WatchSPCBee, Duval, Jim Wells, Kleberg, La Salle, Live Oak and 4 more4 hr

Nearby

Mesoscale Discussions in Oklahoma, 2013Mesoscale Discussions in Texas, 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.