Alert archive / Oklahoma / Mesoscale Discussions in 2012

Mesoscale Discussion 287

March 19, 201221 counties in Oklahoma; 4 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 19, 2012, 10:05 AM CDT for 21 counties in Oklahoma; 4 counties in Texas. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued
Mar 19, 2012, 10:05 AM CDT (15:05 UTC)
Expired
Mar 19, 2012, 12:00 PM CDT
In force
115 min
Issued by
the Storm Prediction Center
All 25 counties

Atoka County, OK, Bryan County, OK, Carter County, OK, Cleveland County, OK, Coal County, OK, Garvin County, OK, Hughes County, OK, Jefferson County, OK, Johnston County, OK, Love County, OK, Marshall County, OK, McClain County, OK, McIntosh County, OK, Murray County, OK, Okfuskee County, OK, Okmulgee County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Seminole County, OK, Stephens County, OK, Clay County, TX, Cooke County, TX, Grayson County, TX, Montague County, TX

The radar

The Norman radar (KTLX), 68 km from the middle of the area, began a volume at 15:06 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 nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 3.1 hours before the alert went out and 59 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 2012-03-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 974 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 2012-03-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 334 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
974 J/kg
Mixed-layer CIN
-91 J/kg
Mixed-layer LCL
637 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
334 m²/s²
0-3 km storm-relative helicity
407 m²/s²
Significant tornado parameter
1.2
Supercell composite
4.0

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
Mar 18, 7:37 PM CDTMesoscale DiscussionSPCBeaver, Beckham, Ellis, Greer, Harmon, Jackson and 2 more53 min
Mar 18, 9:10 PM CDTMesoscale DiscussionSPCBeckham, Ellis, Greer, Harmon, Jackson, Roger Mills and 2 more35 min
Mar 18, 11:37 PM CDTMesoscale DiscussionSPCBeaver, Ellis, Harper53 min
Mar 19, 1:37 AM CDTMesoscale DiscussionSPCBeckham, Greer, Harmon, Jackson, Roger Mills83 min
Mar 19, 1:56 AM CDTSevere Thunderstorm WatchSPCAlfalfa, Beckham, Blaine, Caddo, Canadian, Comanche and 19 more4 hr
Mar 19, 3:34 AM CDTMesoscale DiscussionSPCAlfalfa, Blaine, Caddo, Canadian, Cleveland, Comanche and 21 more86 min
Mar 19, 2:15 PM CDTMesoscale DiscussionSPCBryan, Love, Marshall90 min
Mar 19, 3:55 PM CDTMesoscale DiscussionSPCAdair, Atoka, Bryan, Cherokee, Choctaw, Coal and 14 more95 min
Mar 19, 4:20 PM CDTSevere Thunderstorm WatchSPCAdair, Atoka, Bryan, Cherokee, Choctaw, Coal and 11 more5 hr
Mar 19, 6:32 PM CDTMesoscale DiscussionSPCAdair, Atoka, Bryan, Cherokee, Choctaw, Coal and 9 more58 min
Mar 19, 6:53 PM CDTTornado WatchSPCAdair, Cherokee, Choctaw, Delaware, Haskell, Latimer and 6 more5 hr
Mar 18, 10:09 PM CDTMesoscale DiscussionSPCAndrews, Borden, Crane, Crosby, Dawson, Ector and 13 more96 min
Mar 18, 10:50 PM CDTSevere Thunderstorm WatchSPCAndrews, Borden, Briscoe, Castro, Childress, Coke and 39 more11 hr
Mar 18, 11:23 PM CDTTornado WatchSPCBriscoe, Crosby, Floyd, Garza, Hale, Hall and 6 more4 hr
Mar 19, 4:13 AM CDTMesoscale DiscussionSPCCoke, Fisher, Foard, Glasscock, Haskell, Howard and 16 more92 min
Mar 19, 4:39 AM CDTSevere Thunderstorm WatchSPCCallahan, Coke, Coleman, Concho, Crockett, Fisher and 22 more7 hr
Mar 19, 10:46 AM CDTMesoscale DiscussionSPCCallahan, Coke, Irion, Jones, Nolan, Runnels and 4 more89 min
Mar 19, 2:39 PM CDTTornado WatchSPCBandera, Blanco, Bosque, Brown, Burnet, Coleman and 42 more7 hr
Mar 19, 6:05 PM CDTMesoscale DiscussionSPCAtascosa, Bandera, Bastrop, Bexar, Blanco, Bosque and 47 more85 min
Mar 19, 6:21 PM CDTTornado WatchSPCAtascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 26 more7 hr

Nearby

Mesoscale Discussions in Oklahoma, 2012Mesoscale Discussions in Texas, 2012Every mesoscale discussion in 2012

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.