Alert archive / Oklahoma / Mesoscale Discussions in 2011

Mesoscale Discussion 333

April 3, 20114 counties in Arkansas; Barry County, McDonald County, Newton County, Missouri; 28 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Apr 3, 2011, 9:51 PM CDT for 4 counties in Arkansas; Barry County, McDonald County, Newton County, Missouri; 28 counties in Oklahoma. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued
Apr 3, 2011, 9:51 PM CDT (02:51 UTC)
Expired
Apr 3, 2011, 11:15 PM CDT
In force
84 min
Issued by
the Storm Prediction Center
All 35 counties

Benton County, AR, Crawford County, AR, Madison County, AR, Washington County, AR, Barry County, MO, McDonald County, MO, Newton County, MO, Adair County, OK, Cherokee County, OK, Craig County, OK, Creek County, OK, Delaware County, OK, Haskell County, OK, Hughes County, OK, Kay County, OK, Latimer County, OK, Lincoln County, OK, Mayes County, OK, McIntosh County, OK, Muskogee County, OK, Noble County, OK, Nowata County, OK, Okfuskee County, OK, Okmulgee County, OK, Osage County, OK, Ottawa County, OK, Pawnee County, OK, Payne County, OK, Pittsburg County, OK, Rogers County, OK, Seminole County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 39 km from the middle of the area, began a volume at 02:53 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

Lamont, OK (KLMN), launched 00:00Z, 2.9 hours before the alert went out and 151 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 2011-04-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3 joules per kilogram.LCLEL10008507005003002001001 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 2011-04-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 square meters per square second.1939587897Sfc1 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
3 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
2265 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
20 m²/s²
0-3 km storm-relative helicity
55 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
Apr 4, 1:29 AM CDTMesoscale DiscussionSPCBenton, Carroll91 min
Apr 4, 3:00 AM CDTMesoscale DiscussionSPCClark, Conway, Dallas, Faulkner, Garland, Grant and 20 more3 hr
Apr 4, 3:44 AM CDTSevere Thunderstorm WatchSPCBradley, Calhoun, Clark, Cleburne, Cleveland, Columbia and 37 more7 hr
Apr 4, 5:48 AM CDTMesoscale DiscussionSPCBaxter, Clark, Clay, Cleburne, Conway, Craighead and 41 more117 min
Apr 4, 7:22 AM CDTTornado WatchSPCArkansas, Bradley, Calhoun, Clark, Clay, Cleburne and 42 more7 hr
Apr 4, 7:44 AM CDTSevere Thunderstorm WatchSPCColumbia, Hempstead, Howard, Lafayette, Little River, Miller and 3 more8 hr
Apr 4, 10:25 AM CDTMesoscale DiscussionSPCAshley, Chicot2 hr
Apr 4, 10:53 AM CDTTornado WatchSPCAshley, Chicot7 hr
Apr 3, 7:26 PM CDTMesoscale DiscussionSPCAdair, Andrew, Buchanan, Caldwell, Carroll, Chariton and 16 more64 min
Apr 3, 7:44 PM CDTMesoscale DiscussionSPCClark, Putnam, Schuyler, Scotland61 min
Apr 3, 8:11 PM CDTSevere Thunderstorm WatchSPCAudrain, Boone, Callaway, Cole, Franklin, Gasconade and 12 more6 hr
Apr 3, 8:15 PM CDTMesoscale DiscussionSPCAdair, Andrew, Barton, Bates, Buchanan, Caldwell and 22 more60 min
Apr 3, 8:33 PM CDTSevere Thunderstorm WatchSPCBarton, Benton, Camden, Cedar, Dade, Hickory and 5 more5 hr
Apr 3, 10:50 PM CDTMesoscale DiscussionSPCChariton, Howard, Knox, Lewis, Macon, Marion and 4 more85 min
Apr 3, 11:02 PM CDTMesoscale DiscussionSPCBarton, Camden, Cedar, Dade, Dallas, Greene and 10 more88 min

Nearby

Mesoscale Discussions in Oklahoma, 2011Mesoscale Discussions in Arkansas, 2011Mesoscale Discussions in Missouri, 2011Every mesoscale discussion in 2011

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.