Alert archive / Missouri / Mesoscale Discussions in 2011

Mesoscale Discussion 957

May 25, 201150 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at May 25, 2011, 1:28 PM CDT for 50 counties in Missouri. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued
May 25, 2011, 1:28 PM CDT (18:28 UTC)
Expired
May 25, 2011, 3:00 PM CDT
In force
92 min
Issued by
the Storm Prediction Center
All 50 counties

Adair County, MO, Audrain County, MO, Boone County, MO, Caldwell County, MO, Callaway County, MO, Camden County, MO, Carroll County, MO, Chariton County, MO, Clinton County, MO, Cole County, MO, Cooper County, MO, Crawford County, MO, Dallas County, MO, Daviess County, MO, DeKalb County, MO, Dent County, MO, Douglas County, MO, Franklin County, MO, Gasconade County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Howard County, MO, Knox County, MO, Laclede County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Maries County, MO, Marion County, MO, Mercer County, MO, Miller County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Morgan County, MO, Osage County, MO, Pettis County, MO, Phelps County, MO, Pulaski County, MO, Ralls County, MO, Randolph County, MO, Ray County, MO, Saline County, MO, Shelby County, MO, Sullivan County, MO, Texas County, MO, Warren County, MO, Webster County, MO, Wright County, MO

The radar

The Pleasant Hill radar (KEAX), 132 km from the middle of the area, began a volume at 18:31 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, 6.5 hours before the alert went out and 241 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 2011-05-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2063 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 2011-05-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 500 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
2063 J/kg
Mixed-layer CIN
-54 J/kg
Mixed-layer LCL
564 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
500 m²/s²
0-3 km storm-relative helicity
405 m²/s²
Significant tornado parameter
0.0
Supercell composite
13.7

Open this sounding in Storm Lab

The text

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

552 
ACUS11 KWNS 251829
SWOMCD
SPC MCD 251828
MOZ000-IAZ000-252000-

MESOSCALE DISCUSSION 0957
NWS STORM PREDICTION CENTER NORMAN OK
0128 PM CDT WED MAY 25 2011

AREAS AFFECTED...NRN MO

CONCERNING...TORNADO WATCH 369...

VALID 251828Z - 252000Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 369 CONTINUES.

A SEVERE THREAT WILL CONTINUE ACROSS WW 369 WITH TORNADOES AND LARGE
HAIL LIKELY WITH THE STRONGER CELLS. THE TORNADO THREAT SHOULD
EXPAND NNEWD ACROSS THE VALID PART OF TORNADO WATCH 369. A LOCAL
EXTENSION HAS BEEN COORDINATED WITH LOCAL WFO.

A LINE OF SUPERCELLS IS ONGOING FROM JUST EAST OF KANSAS CITY  NEAR
A 996 MB SFC LOW EXTENDING SSEWD ACROSS CNTRL MO ALONG THE WRN EDGE
OF STRONG INSTABILITY. THIS LINE SHOULD CONTINUE EWD ACROSS CNTRL
MO. THE MORE INTENSE SUPERCELLS WILL CONTAIN A THREAT FOR
TORNADOES...WIND DAMAGE AND LARGE HAIL. A THREAT FOR STRONG
TORNADOES WILL EXIST WITH THE MORE INTENSE SUPERCELLS. A SEVERE
THREAT SHOULD ALSO EXIST SWWD INTO SW MO WHERE MID-LEVEL FLOW IS
QUITE STRONG BENEATH THE NRN EDGE OF AN EJECTION MID-LEVEL JET.

FURTHER TO THE NORTH ACROSS NRN MO...MODERATE INSTABILITY IS NOW IN
PLACE WITH MESOANALYSIS SHOWING MLCAPE VALUES IN THE 1000 TO 1500
J/KG RANGE. THIS PART OF THE WARM SECTOR IS BENEATH THE NERN EDGE OF
UPPER-LEVEL LOW WHERE TEMPS ALOFT ARE QUITE COLD. 500 MB TEMPS OF
-15C TO -16C ALONG WITH 30 TO 40 KT OF DEEP LAYER SHEAR SHOULD BE
FAVORABLE FOR SUPERCELLS WITH LARGE HAIL. IN ADDITION...SFC WINDS
ARE BACKED TO THE EAST ACROSS NRN MO SUGGESTING DIRECTIONAL SHEAR
WILL BE FAVORABLE FOR TORNADOES AS WELL.

..BROYLES.. 05/25/2011

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

ATTN...WFO...LSX...SGF...DMX...EAX...

LAT...LON   40229204 40589376 40359453 39819472 39289440 38999356
            38549318 37349331 36889261 36889213 37309135 38219104
            39309116 39569131 40229204

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 24, 7:07 PM CDTMesoscale DiscussionSPCAndrew, Barton, Bates, Buchanan, Cass, Cedar and 14 more53 min
May 24, 7:26 PM CDTTornado WatchSPCAdair, Barry, Barton, Bates, Benton, Buchanan and 48 more7 hr
May 24, 7:42 PM CDTMesoscale DiscussionSPCMcDonald63 min
May 24, 11:24 PM CDTMesoscale DiscussionSPCBenton, Camden, Christian, Cooper, Dallas, Douglas and 15 more96 min
May 25, 12:48 AM CDTMesoscale DiscussionSPCAudrain, Bollinger, Boone, Butler, Callaway, Cape Girardeau and 46 more57 min
May 25, 1:22 AM CDTTornado WatchSPCAudrain, Boone, Callaway, Camden, Christian, Clark and 43 more7 hr
May 25, 4:58 AM CDTMesoscale DiscussionSPCCrawford, Dent, Franklin, Iron, Jefferson, Reynolds and 7 more92 min
May 25, 5:46 AM CDTTornado WatchSPCPerry7 hr
May 25, 7:31 AM CDTMesoscale DiscussionSPCBollinger, Butler, Cape Girardeau, Dunklin, Mississippi, New Madrid and 4 more59 min
May 25, 9:54 AM CDTMesoscale DiscussionSPCBenton, Butler, Camden, Carter, Christian, Dallas and 24 more96 min
May 25, 10:18 AM CDTMesoscale DiscussionSPCCarter, Dent, Howell, Iron, Jefferson, Madison and 6 more57 min
May 25, 10:37 AM CDTTornado WatchSPCAudrain, Barry, Bates, Benton, Boone, Caldwell and 58 more7 hr
May 25, 11:02 AM CDTMesoscale DiscussionSPCBollinger, Butler, Cape Girardeau, Carter, Crawford, Dent and 17 more28 min
May 25, 11:09 AM CDTTornado Watch PDSSPCBollinger, Butler, Cape Girardeau, Carter, Franklin, Iron and 19 more10 hr
May 25, 11:52 AM CDTMesoscale DiscussionSPCDunklin, Pemiscot83 min
May 25, 12:28 PM CDTTornado Watch PDSSPCDunklin, Pemiscot8 hr
May 25, 2:31 PM CDTTornado WatchSPCClark, Scotland7 hr
May 25, 2:32 PM CDTMesoscale DiscussionSPCAudrain, Lincoln, Marion, Monroe, Montgomery, Pike and 2 more58 min
May 25, 2:56 PM CDTMesoscale DiscussionSPCDunklin, Pemiscot94 min
May 25, 3:10 PM CDTMesoscale DiscussionSPCBollinger, Butler, Cape Girardeau, Carter, Madison, Mississippi and 9 more95 min
May 25, 5:56 PM CDTMesoscale DiscussionSPCDunklin, Pemiscot64 min
May 25, 6:25 PM CDTMesoscale DiscussionSPCBollinger, Butler, Cape Girardeau, Mississippi, Perry, Scott and 2 more2 hr

Nearby

Mesoscale 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.