Alert archive / Missouri / Mesoscale Discussions in 2011

Mesoscale Discussion 862

May 22, 20114 states

The Storm Prediction Center issued this mesoscale discussion at May 22, 2011, 3:48 PM CDT for 4 states. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued
May 22, 2011, 3:48 PM CDT (20:48 UTC)
Expired
May 22, 2011, 5:45 PM CDT
In force
117 min
Issued by
the Storm Prediction Center
All 56 counties

Benton County, AR, Carroll County, AR, Crawford County, AR, Franklin County, AR, Madison County, AR, Washington County, AR, Cherokee County, KS, Crawford County, KS, Barry County, MO, Barton County, MO, Bates County, MO, Benton County, MO, Camden County, MO, Cedar County, MO, Christian County, MO, Cole County, MO, Dade County, MO, Dallas County, MO, Greene County, MO, Henry County, MO, Hickory County, MO, Jasper County, MO, Johnson County, MO, Laclede County, MO, Lawrence County, MO, Maries County, MO, McDonald County, MO, Miller County, MO, Moniteau County, MO, Morgan County, MO, Newton County, MO, Osage County, MO, Pettis County, MO, Polk County, MO, Pulaski County, MO, St. Clair County, MO, Stone County, MO, Taney County, MO, Vernon 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), 86 km from the middle of the area, began a volume at 20:47 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

Springfield, MO (KSGF), launched 12:00Z, 8.8 hours before the alert went out and 34 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 2011-05-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2645 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 2011-05-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 424 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
2645 J/kg
Mixed-layer CIN
-122 J/kg
Mixed-layer LCL
678 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
424 m²/s²
0-3 km storm-relative helicity
422 m²/s²
Significant tornado parameter
0.0
Supercell composite
16.9

Open this sounding in Storm Lab

The text

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

838 
ACUS11 KWNS 222048
SWOMCD
SPC MCD 222048 
MOZ000-ARZ000-OKZ000-KSZ000-222245-

MESOSCALE DISCUSSION 0862
NWS STORM PREDICTION CENTER NORMAN OK
0348 PM CDT SUN MAY 22 2011

AREAS AFFECTED...ERN OK...SERN KS...SWRN MO

CONCERNING...TORNADO WATCH 325...

VALID 222048Z - 222245Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 325 CONTINUES.

VIGOROUS CONVECTION CONTINUE TO INTENSIFY ALONG THE DRYLINE FROM WRN
MO INTO SERN KS. A MODIFIED 19Z SGF SOUNDING USING OBSERVED SURFACE
OBSERVATIONS ALONG THE DRYLINE YIELDS OVER 5000 J/KG MUCAPE WITH A
300 MB LI OF -19C. ALSO DEPICTED IN THIS SOUNDING...AND ON NDS AND
CNW PROFILERS...IS 40-50 KT MID LEVEL FLOW ATOP VEERING LOW LEVEL
FLOW...MORE THAN SUFFICIENT FOR SUPERCELLS. EXISTING STORMS WILL
PERSIST WITH AN EXTREME HAIL THREAT AS WELL AS THE POSSIBILITY OF
CYCLIC TORNADOES.

TO THE S...A SUBSTANTIAL CU FIELD REMAINS OVER NERN OK...AND SWD
ACROSS ERN OK WHERE DEWPOINTS ARE IN EXCESS OF 72 F. HERE...SBCAPE
IS AVERAGING 5500-6000 J/KG. HKL AND PRC PROFILERS ALSO INDICATE
INCREASING MID TO UPPER LEVEL FLOW TO 50-60 KTS ABOVE 9 KM. STRONG
HEATING PERSISTS NEAR THE DRYLINE...ALTHOUGH CONVERGENCE IS WEAK.
TOWERING CU PERSIST ALONG THE DRYLINE. ANY ROBUST STORMS THAT DO
FORM WILL CERTAINLY PRODUCE VERY LARGE HAIL AND HAVE A THREAT OF
TORNADOES.

..JEWELL.. 05/22/2011

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

ATTN...WFO...LSX...LZK...SGF...EAX...TSA...ICT...OUN...

LAT...LON   35239402 35239668 38769406 38759127 35239402

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 21, 8:31 PM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Clark, Cleburne and 45 more89 min
May 22, 5:18 AM CDTMesoscale DiscussionSPCArkansas, Calhoun, Clark, Cleburne, Cleveland, Conway and 32 more57 min
May 22, 7:03 AM CDTSevere Thunderstorm WatchSPCArkansas, Bradley, Calhoun, Clark, Cleveland, Conway and 30 more7 hr
May 22, 11:15 AM CDTMesoscale DiscussionSPCArkansas, Bradley, Calhoun, Clark, Cleveland, Conway and 26 more90 min
May 22, 1:06 PM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Fulton, Marion114 min
May 22, 1:09 PM CDTMesoscale DiscussionSPCArkansas, Crittenden, Cross, Grant, Jefferson, Lee and 7 more66 min
May 22, 1:27 PM CDTTornado WatchSPCBenton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more8 hr
May 22, 3:10 PM CDTMesoscale DiscussionSPCBaxter, Boone, Cleburne, Independence, Izard, Jackson and 9 more65 min
May 22, 3:24 PM CDTTornado WatchSPCBaxter, Boone, Clay, Cleburne, Conway, Craighead and 22 more6 hr
May 22, 5:21 PM CDTMesoscale DiscussionSPCBaxter, Boone, Carroll, Clay, Cleburne, Conway and 22 more54 min
May 22, 6:10 PM CDTMesoscale DiscussionSPCBenton, Carroll, Crawford, Franklin, Madison, Washington65 min
May 21, 7:18 PM CDTMesoscale DiscussionSPCAtchison, Barton, Brown, Clay, Cloud, Dickinson and 30 more57 min
May 22, 10:53 AM CDTMesoscale DiscussionSPCAnderson, Franklin, Johnson, Linn, Miami, Wyandotte2 hr
May 22, 12:51 PM CDTTornado WatchSPCLinn, Miami10 hr
May 21, 8:55 PM CDTMesoscale DiscussionSPCAtchison65 min
May 22, 4:41 AM CDTMesoscale DiscussionSPCAdair, Audrain, Boone, Clark, Knox, Lewis and 9 more2 hr
May 21, 7:08 PM CDTTornado WatchSPCAtoka, Bryan, Carter, Choctaw, Coal, Creek and 14 more3 hr
May 22, 12:42 PM CDTMesoscale DiscussionSPCCarter, Garvin, Jefferson, Johnston, Love, Marshall and 2 more2 hr
May 22, 1:47 PM CDTTornado WatchSPCAtoka, Bryan, Carter, Coal, Garvin, Hughes and 10 more7 hr
May 22, 3:47 PM CDTMesoscale DiscussionSPCCarter, Coal, Hughes, Johnston, Love, McIntosh and 5 more58 min
May 22, 6:34 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Coal, Garvin, Hughes and 10 more56 min

Nearby

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