Alert archive / Missouri / Mesoscale Discussions in 2011

Mesoscale Discussion 874

May 22, 20115 states

The Storm Prediction Center issued this mesoscale discussion at May 22, 2011, 7:52 PM CDT for 5 states. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued
May 22, 2011, 7:52 PM CDT (00:52 UTC)
Expired
May 22, 2011, 8:45 PM CDT
In force
53 min
Issued by
the Storm Prediction Center
All 107 counties

Baxter County, AR, Benton County, AR, Boone County, AR, Carroll County, AR, Conway County, AR, Crawford County, AR, Franklin County, AR, Fulton County, AR, Izard County, AR, Johnson County, AR, Logan County, AR, Madison County, AR, Marion County, AR, Newton County, AR, Pope County, AR, Searcy County, AR, Stone County, AR, Van Buren County, AR, Washington County, AR, Bond County, IL, Calhoun County, IL, Clinton County, IL, Greene County, IL, Jersey County, IL, Macoupin County, IL, Madison County, IL, Monroe County, IL, Montgomery County, IL, Randolph County, IL, Saint Clair County, IL, Washington County, IL, Cherokee County, KS, Crawford County, KS, Barry County, MO, Barton County, MO, Bates County, MO, Benton County, MO, Callaway County, MO, Camden County, MO, Carter County, MO, Cedar County, MO, Christian County, MO, City of Saint Louis, MO, Cole County, MO, Crawford County, MO, Dade County, MO, Dallas County, MO, Dent County, MO, Douglas County, MO, Franklin County, MO, Gasconade County, MO, Greene County, MO, Henry County, MO, Hickory County, MO, Howell County, MO, Iron County, MO, Jasper County, MO, Jefferson County, MO, Johnson County, MO, Laclede County, MO, Lawrence County, MO, Lincoln County, MO, Madison County, MO, Maries County, MO, McDonald County, MO, Miller County, MO, Moniteau County, MO, Montgomery County, MO, Morgan County, MO, Newton County, MO, Oregon County, MO, Osage County, MO, Ozark County, MO, Pettis County, MO, Phelps County, MO, Polk County, MO, Pulaski County, MO, Reynolds County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Shannon County, MO, St. Clair County, MO, Stone County, MO, Taney County, MO, Texas County, MO, Vernon County, MO, Warren County, MO, Washington County, MO, Webster County, MO, Wright County, MO, Adair County, OK, Cherokee County, OK, Craig County, OK, Delaware County, OK, Haskell County, OK, Mayes County, OK, McIntosh County, OK, Muskogee County, OK, Okfuskee County, OK, Okmulgee County, OK, Ottawa County, OK, Rogers County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK

The radar

The Springfield radar (KSGF), 97 km from the middle of the area, began a volume at 00:55 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 00:00Z, 0.9 hours before the alert went out and 147 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 00:00Z on 2011-05-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3961 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 00:00Z on 2011-05-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 183 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
3961 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
641 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
183 m²/s²
0-3 km storm-relative helicity
180 m²/s²
Significant tornado parameter
3.7
Supercell composite
15.9

Open this sounding in Storm Lab

The text

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

654 
ACUS11 KWNS 230053
SWOMCD
SPC MCD 230052
ILZ000-MOZ000-ARZ000-OKZ000-KSZ000-230145-

MESOSCALE DISCUSSION 0874
NWS STORM PREDICTION CENTER NORMAN OK
0752 PM CDT SUN MAY 22 2011

AREAS AFFECTED...CNTRL/SRN/ERN MO...NRN AR...NERN/E-CNTRL
OK...PORTIONS OF WRN/CNTRL IL

CONCERNING...TORNADO WATCH 325...

VALID 230052Z - 230145Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 325 CONTINUES.

AT 0030Z...REGIONAL RADAR IMAGERY SHOWED SEVERAL QLCS TYPE
STRUCTURES BEGINNING TO EVOLVE ACROSS PORTIONS OF CNTRL/SWRN MO AND
NERN/E-CNTRL OK. ONE QLCS WAS LOCATED OVER NRN PORTIONS OF WW 325
NEAR JEF MOVING E TOWARD STL...WHILE A SECOND WAS LOCATED IN THE
SWRN CORNER OF MO PROPAGATING SWD INTO THE INSTABILITY AXIS AND
ALONG REMNANT OUTFLOW BOUNDARY...AND A THIRD OVER PORTIONS OF
E-CNTRL OK. BETWEEN THE SWRN MO AND E-CNTRL OK QLCS...A DISCRETE
RIGHT MOVING SUPERCELL WAS LOCATED 35 NE OF MKO. WITH EFFECTIVE SRH
VALUES FROM 200-400 M2 S-2 PERSISTING INTO THE NIGHT...EMBEDDED
SUPERCELLS WITHIN THE QUASI-LINEAR ACTIVITY OR ANY REMAINING
DISCRETE STORMS WILL CONTINUE TO POSE A TORNADO THREAT.
OTHERWISE...LARGE HAIL THREAT MAY BE TRANSITIONING TO MORE OF A
DAMAGING WIND THREAT GIVEN RECENT CONVECTIVE MODE EVOLUTION.

A NEW WW WILL LIKELY BE NEEDED DURING THE NEXT HR OVER PORTIONS OF
CNTRL/WRN IL...ERN/SRN MO...NRN AR...AND ERN OK.

..GARNER.. 05/23/2011

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

ATTN...WFO...PAH...ILX...MEG...LSX...LZK...SGF...EAX...TSA...
ICT...OUN...

LAT...LON   38779410 38809223 39579049 39528914 38498910 35199254
            35219406 35209670 38779410

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
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, 12:12 PM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Clay, Craighead and 13 more93 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 22, 8:26 PM CDTTornado WatchSPCBond, Calhoun, Cass, Champaign, Christian, Clay and 35 more8 hr
May 22, 9:35 PM CDTMesoscale DiscussionSPCDeKalb, DuPage, Grundy, Iroquois, Kane, Kankakee and 6 more55 min
May 22, 10:24 PM CDTMesoscale DiscussionSPCClark, Clay, Coles, Crawford, Cumberland, Edgar and 9 more66 min
May 23, 7:25 AM CDTMesoscale DiscussionSPCEdgar, Vermilion65 min
May 23, 10:55 AM CDTSevere Thunderstorm WatchSPCAlexander, Bond, Calhoun, Clinton, Edwards, Fayette and 27 more7 hr
May 23, 12:37 PM CDTMesoscale DiscussionSPCBond, Christian, Clark, Clay, Clinton, Coles and 34 more83 min
May 23, 12:54 PM CDTSevere Thunderstorm WatchSPCChampaign, Christian, Clark, Clay, Coles, Crawford and 13 more5 hr
May 23, 2:52 PM CDTMesoscale DiscussionSPCClark, Clay, Coles, Crawford, Cumberland, Edgar and 8 more53 min
May 23, 4:24 PM CDTMesoscale DiscussionSPCMassac96 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, 8:10 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.