Alert archive / Missouri / Mesoscale Discussions in 2021

Mesoscale Discussion 1235

July 10, 20214 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Jul 10, 2021, 5:04 AM CDT for 4 counties in Missouri. It was in force for 56 min.

The area

The outline as issued.

The facts

Issued
Jul 10, 2021, 5:04 AM CDT (10:04 UTC)
Expired
Jul 10, 2021, 6:00 AM CDT
In force
56 min
Issued by
the Storm Prediction Center
Concerning
Severe thunderstorm watch 364

Counties Butler County, MO, Carter County, MO, Ripley County, MO, Stoddard County, MO

The radar

The Paducah radar (KPAH), 126 km from the middle of the area, began a volume at 10:08 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

Little Rock, AR (KLZK), launched 00:00Z, 10.1 hours before the alert went out and 227 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, Little Rock, AR at 00:00Z on 2021-07-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1372 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, Little Rock, AR at 00:00Z on 2021-07-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -19 square meters per square second.1939Sfc1 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
1372 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
1621 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
-19 m²/s²
0-3 km storm-relative helicity
7 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

Open this sounding in Storm Lab

The text

As transmitted.

617 
ACUS11 KWNS 101004
SWOMCD
SPC MCD 101004 
MOZ000-ILZ000-101100-

Mesoscale Discussion 1235
NWS Storm Prediction Center Norman OK
0504 AM CDT Sat Jul 10 2021

Areas affected...southeastern Missouri

Concerning...Severe Thunderstorm Watch 364...

Valid 101004Z - 101100Z

The severe weather threat for Severe Thunderstorm Watch 364
continues.

SUMMARY...Severe risk continues to diminish over the southern
Illinois area.

DISCUSSION...A broken band of thunderstorms continues across the
southeastern Missouri vicinity, in/near remaining portions of WW
364.  However, convection has remained sub-severe over the past
hour, and this trend is expected to continue the remainder of the
morning given the rather modest CAPE/shear environment.  As such, WW
expiration scheduled for 10/11Z appears reasonable as threat wanes.

..Goss.. 07/10/2021

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...PAH...MEG...SGF...

LAT...LON   37018927 36609017 36579111 37059119 36959000 37018927

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 9, 7:08 PM CDTSevere Thunderstorm WatchSPCClark, Scotland3 hr
Jul 9, 7:54 PM CDTMesoscale DiscussionSPCAdair, Audrain, Chariton, Clark, Grundy, Knox and 18 more36 min
Jul 9, 8:18 PM CDTTornado WatchSPCAdair, Audrain, Boone, Callaway, Carroll, Chariton and 32 more6 hr
Jul 9, 9:12 PM CDTMesoscale DiscussionSPCAndrew, Atchison, Buchanan, Caldwell, Clay, Clinton and 8 more2 hr
Jul 9, 9:58 PM CDTSevere Thunderstorm WatchSPCAndrew, Atchison, Buchanan, Caldwell, Carroll, Chariton and 22 more7 hr
Jul 9, 10:26 PM CDTMesoscale DiscussionSPCAdair, Audrain, Boone, Callaway, Chariton, Cole and 21 more64 min
Jul 10, 1:01 AM CDTMesoscale DiscussionSPCBollinger, Boone, Callaway, Cape Girardeau, Chariton, Cole and 23 more59 min
Jul 10, 1:21 AM CDTMesoscale DiscussionSPCAndrew, Atchison, Buchanan, Caldwell, Clay, Clinton and 11 more84 min
Jul 10, 1:36 AM CDTSevere Thunderstorm WatchSPCBollinger, Butler, Cape Girardeau, Carter, Perry, Ripley and 3 more4 hr
Jul 10, 2:57 AM CDTMesoscale DiscussionSPCBates, Caldwell, Carroll, Cass, Chariton, Clay and 20 more93 min
Jul 10, 3:09 AM CDTMesoscale DiscussionSPCBollinger, Butler, Cape Girardeau, Carter, Perry, Ripley and 3 more2 hr
Jul 10, 11:37 AM CDTMesoscale DiscussionSPCBarry, Christian, Douglas, Howell, Laclede, McDonald and 9 more83 min
Jul 10, 1:20 PM CDTMesoscale DiscussionSPCAndrew, Atchison, Holt, Nodaway115 min
Jul 10, 1:25 PM CDTMesoscale DiscussionSPCBollinger, Butler, Camden, Cape Girardeau, Carter, Cedar and 34 more2 hr
Jul 10, 2:01 PM CDTSevere Thunderstorm WatchSPCBollinger, Butler, Cape Girardeau, Carter, Crawford, Franklin and 16 more8 hr
Jul 10, 2:17 PM CDTMesoscale DiscussionSPCBarry, Barton, Jasper, McDonald, Newton, Vernon118 min
Jul 10, 2:18 PM CDTSevere Thunderstorm WatchSPCAndrew, Atchison, Buchanan, Clay, Clinton, DeKalb and 6 more7 hr
Jul 10, 3:02 PM CDTSevere Thunderstorm WatchSPCBarry, Barton, Camden, Cedar, Christian, Dade and 26 more8 hr
Jul 10, 3:44 PM CDTMesoscale DiscussionSPCAtchison, Holt91 min
Jul 10, 5:27 PM CDTMesoscale DiscussionSPCAndrew, Buchanan, Caldwell, Carroll, Clay, Clinton and 13 more2 hr

Nearby

Mesoscale Discussions in Missouri, 2021Every mesoscale discussion in 2021

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.