Alert archive / Kansas / Mesoscale Discussions in 2012

Mesoscale Discussion 380

March 29, 201212 counties in Kansas; 8 counties in Oklahoma; Hemphill County, Lipscomb County, Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 29, 2012, 4:50 PM CDT for 12 counties in Kansas; 8 counties in Oklahoma; Hemphill County, Lipscomb County, Texas. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued
Mar 29, 2012, 4:50 PM CDT (21:50 UTC)
Expired
Mar 29, 2012, 5:45 PM CDT
In force
55 min
Issued by
the Storm Prediction Center
All 22 counties

Barber County, KS, Comanche County, KS, Dickinson County, KS, Harper County, KS, Harvey County, KS, Kingman County, KS, Marion County, KS, McPherson County, KS, Pratt County, KS, Reno County, KS, Saline County, KS, Sedgwick County, KS, Alfalfa County, OK, Dewey County, OK, Ellis County, OK, Harper County, OK, Major County, OK, Roger Mills County, OK, Woods County, OK, Woodward County, OK, Hemphill County, TX, Lipscomb County, TX

The radar

The Vance AFB radar (KVNX), 73 km from the middle of the area, began a volume at 21:49 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 12:00Z, 9.8 hours before the alert went out and 121 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 12:00Z on 2012-03-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 619 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 12:00Z on 2012-03-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -92 square meters per square second.193958Sfc1 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
619 J/kg
Mixed-layer CIN
-355 J/kg
Mixed-layer LCL
1103 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
-92 m²/s²
0-3 km storm-relative helicity
-52 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
Mar 28, 7:53 PM CDTMesoscale DiscussionSPCAllen, Anderson, Atchison, Bourbon, Brown, Clay and 24 more2 hr
Mar 28, 8:17 PM CDTSevere Thunderstorm WatchSPCAllen, Greenwood, Woodson4 hr
Mar 28, 11:21 PM CDTMesoscale DiscussionSPCAtchison, Brown, Doniphan, Nemaha84 min
Mar 29, 4:54 PM CDTMesoscale DiscussionSPCAtchison, Brown, Doniphan, Jackson, Marshall, Nemaha and 2 more36 min
Mar 29, 5:10 PM CDTTornado WatchSPCAtchison, Brown, Doniphan, Jackson, Jefferson, Marshall and 3 more6 hr
Mar 29, 5:30 PM CDTSevere Thunderstorm WatchSPCBarber, Butler, Chase, Coffey, Cowley, Douglas and 13 more8 hr
Mar 29, 6:58 PM CDTMesoscale DiscussionSPCAtchison, Brown, Doniphan, Jackson, Jefferson, Marshall and 4 more62 min
Mar 29, 5:27 PM CDTMesoscale DiscussionSPCAransas, Kenedy, Kleberg, Nueces, Refugio, San Patricio and 1 more63 min
Mar 29, 5:57 PM CDTMesoscale DiscussionSPCCoke, Crockett, Irion, Nolan, Reagan, Schleicher and 2 more63 min

Nearby

Mesoscale Discussions in Kansas, 2012Mesoscale 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.