Alert archive / Missouri / Mesoscale Discussions in 2011

Mesoscale Discussion 892

May 23, 20114 states

The Storm Prediction Center issued this mesoscale discussion at May 23, 2011, 12:12 PM CDT for 4 states. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued
May 23, 2011, 12:12 PM CDT (17:12 UTC)
Expired
May 23, 2011, 1:45 PM CDT
In force
93 min
Issued by
the Storm Prediction Center
All 59 counties

Baxter County, AR, Benton County, AR, Boone County, AR, Carroll County, AR, Clay County, AR, Craighead County, AR, Fulton County, AR, Greene County, AR, Independence County, AR, Izard County, AR, Lawrence County, AR, Madison County, AR, Marion County, AR, Newton County, AR, Randolph County, AR, Searcy County, AR, Sharp County, AR, Stone County, AR, Washington County, AR, Cherokee County, KS, Labette County, KS, Barry County, MO, Camden County, MO, Carter County, MO, Christian County, MO, Dade County, MO, Dallas County, MO, Dent County, MO, Douglas County, MO, Greene County, MO, Howell County, MO, Jasper County, MO, Laclede County, MO, Lawrence County, MO, Maries County, MO, McDonald County, MO, Miller County, MO, Newton County, MO, Oregon County, MO, Ozark County, MO, Phelps County, MO, Polk County, MO, Pulaski County, MO, Reynolds County, MO, Ripley County, MO, Shannon County, MO, Stone County, MO, Taney County, MO, Texas County, MO, Webster County, MO, Wright County, MO, Adair County, OK, Cherokee County, OK, Craig County, OK, Delaware County, OK, Mayes County, OK, Nowata County, OK, Ottawa County, OK, Rogers County, OK

The radar

The Springfield radar (KSGF), 41 km from the middle of the area, began a volume at 17:14 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

Springfield, MO (KSGF), launched 12:00Z, 5.2 hours before the alert went out and 65 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, Springfield, MO at 12:00Z on 2011-05-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1041 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, Springfield, MO at 12:00Z on 2011-05-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 247 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
1041 J/kg
Mixed-layer CIN
-257 J/kg
Mixed-layer LCL
1640 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
247 m²/s²
0-3 km storm-relative helicity
224 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

729 
ACUS11 KWNS 231712
SWOMCD
SPC MCD 231712 
MOZ000-ARZ000-OKZ000-KSZ000-231845-

MESOSCALE DISCUSSION 0892
NWS STORM PREDICTION CENTER NORMAN OK
1212 PM CDT MON MAY 23 2011

AREAS AFFECTED...NE OK...SE KS...NW AR AND SW TO CNTRL MO

CONCERNING...SEVERE THUNDERSTORM WATCH 337...

VALID 231712Z - 231845Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 337
CONTINUES.

THE SEVERE THREAT IN WW 337 IS EXPECTED TO BECOME INCREASINGLY
ISOLATED AND MARGINAL OVER THE NEXT 1 TO 2 HOURS. FOR THIS
REASON...WW 337 WILL BE ALLOWED TO EXPIRE AT 18Z.

AN MCS IS CURRENTLY LOCATED ACROSS WW 337 WITH THE STRONGEST
THUNDERSTORMS IN THE WRN PART OF WW 337 ACROSS FAR NE OK...FAR SW MO
AND FAR NW AR. THIS ACTIVITY IS LOCATED ALONG A GRADIENT OF MODERATE
INSTABILITY AND JUST TO THE NORTHWEST OF A 35 TO 45 KT LOW-LEVEL
JET. AS THE LINE MOVES INTO NW AR...THE MODERATE INSTABILITY ALONG
WITH ABOUT 40 KT OF DEEP LAYER SHEAR EVIDENT ON THE WSR-88D VWP IN
NE OK SHOULD SUPPORT AN ISOLATED WIND DAMAGE AND HAIL THREAT.
HOWEVER...RECENT RADAR TRENDS SUGGEST THE LINE HAS ALREADY MATURED
AND IS OUTFLOW DOMINANT. FOR THIS REASON...THE SEVERE THREAT IS
EXPECTED TO REMAIN ISOLATED AND SHOULD BECOME INCREASINGLY MARGINAL
OVER THE NEXT FEW HOURS.

..BROYLES.. 05/23/2011

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...PAH...MEG...LSX...LZK...SGF...TSA...ICT...

LAT...LON   35749081 35599320 35749458 36109557 36439591 36919582
            37229546 37309466 37379430 37469379 37999308 38319288
            38499251 38369197 38009150 37329084 36389036 35949037
            35749081

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 22, 7:52 PM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Conway, Crawford and 13 more53 min
May 22, 8:47 PM CDTTornado WatchSPCBaxter, Benton, Boone, Carroll, Clay, Cleburne and 34 more7 hr
May 22, 11:46 PM CDTMesoscale DiscussionSPCClay, Cleburne, Conway, Craighead, Crawford, Cross and 23 more89 min
May 23, 5:07 AM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Crawford, Fulton and 10 more113 min
May 23, 7:38 AM CDTMesoscale DiscussionSPCBenton, Carroll97 min
May 23, 9:14 AM CDTMesoscale DiscussionSPCClark, Cleburne, Conway, Crawford, Dallas, Faulkner and 26 more91 min
May 23, 9:57 AM CDTMesoscale DiscussionSPCLafayette, Little River, Miller33 min
May 23, 10:34 AM CDTMesoscale DiscussionSPCBenton, Carroll, Fulton86 min
May 23, 12:10 PM CDTMesoscale DiscussionSPCLafayette, Miller65 min
May 23, 1:16 PM CDTMesoscale DiscussionSPCBaxter, Clay, Craighead, Fulton, Greene, Independence and 5 more89 min
May 23, 1:34 PM CDTSevere Thunderstorm WatchSPCClay, Cleburne, Conway, Craighead, Crittenden, Cross and 20 more6 hr
May 23, 3:58 PM CDTMesoscale DiscussionSPCClay, Cleburne, Conway, Craighead, Crittenden, Cross and 20 more92 min
May 23, 5:07 PM CDTMesoscale DiscussionSPCBenton, Crawford, Washington23 min
May 23, 5:24 PM CDTTornado WatchSPCCrawford, Franklin, Sebastian, Washington4 hr
May 23, 6:18 PM CDTMesoscale DiscussionSPCCleburne, Craighead, Crittenden, Cross, Faulkner, Independence and 11 more87 min
May 23, 5:41 AM CDTMesoscale DiscussionSPCAllen, Anderson, Bourbon, Chautauqua, Cherokee, Crawford and 7 more94 min
May 23, 6:08 AM CDTSevere Thunderstorm WatchSPCAllen, Anderson, Bourbon, Chautauqua, Cherokee, Coffey and 11 more7 hr
May 23, 4:38 PM CDTMesoscale DiscussionSPCButler, Chase, Cowley, Elk, Greenwood, Harper and 6 more97 min
May 22, 8:26 PM CDTTornado WatchSPCBarry, Bollinger, Butler, Cape Girardeau, Carter, Crawford and 33 more8 hr
May 22, 10:24 PM CDTMesoscale DiscussionSPCBollinger, Butler, Cape Girardeau, Madison, Perry, Sainte Genevieve and 2 more66 min
May 23, 10:55 AM CDTSevere Thunderstorm WatchSPCAudrain, Bollinger, Boone, Butler, Callaway, Cape Girardeau and 28 more7 hr
May 23, 12:37 PM CDTMesoscale DiscussionSPCCity of Saint Louis83 min
May 22, 8:10 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Choctaw, Coal, Garvin and 11 more65 min
May 23, 2:08 PM CDTMesoscale DiscussionSPCAlfalfa, Beckham, Blaine, Caddo, Canadian, Comanche and 15 more97 min
May 23, 2:30 PM CDTTornado WatchSPCAlfalfa, Beckham, Blaine, Caddo, Canadian, Cleveland and 26 more8 hr
May 23, 6:51 PM CDTMesoscale DiscussionSPCBlaine, Caddo, Canadian, Cleveland, Comanche, Cotton and 12 more84 min

Nearby

Mesoscale Discussions in Missouri, 2011Mesoscale Discussions in Arkansas, 2011Mesoscale Discussions in Oklahoma, 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.