Alert archive / Missouri / Mesoscale Discussions in 2022

Mesoscale Discussion 593

April 30, 20225 states

The Storm Prediction Center issued this mesoscale discussion at Apr 30, 2022, 1:09 PM CDT for 5 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Apr 30, 2022, 1:09 PM CDT (18:09 UTC)
Expired
Apr 30, 2022, 3:15 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
Concerning
Severe potential...watch likely
Chance of a watch
80%
All 73 counties

Baxter County, AR, Clay County, AR, Cleburne County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Fulton County, AR, Greene County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Lawrence County, AR, Mississippi County, AR, Poinsett County, AR, Randolph County, AR, Sharp County, AR, Stone County, AR, White County, AR, Woodruff County, AR, Alexander County, IL, Clinton County, IL, Franklin County, IL, Jackson County, IL, Jefferson County, IL, Johnson County, IL, Madison County, IL, Monroe County, IL, Perry County, IL, Pulaski County, IL, Randolph County, IL, Saint Clair County, IL, Union County, IL, Washington County, IL, Williamson County, IL, Ballard County, KY, Carlisle County, KY, Fulton County, KY, Hickman County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, City of Saint Louis, MO, Crawford County, MO, Dent County, MO, Dunklin County, MO, Franklin County, MO, Howell County, MO, Iron County, MO, Jefferson County, MO, Madison County, MO, Mississippi County, MO, New Madrid County, MO, Oregon County, MO, Pemiscot County, MO, Perry County, MO, Reynolds County, MO, Ripley County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Scott County, MO, Shannon County, MO, Stoddard County, MO, Washington County, MO, Wayne County, MO, Dyer County, TN, Lake County, TN, Lauderdale County, TN, Obion County, TN, Shelby County, TN, Tipton County, TN

The radar

The Paducah radar (KPAH), 190 km from the middle of the area, began a volume at 18:08 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 6.2 hours before the alert went out and 249 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 12:00Z on 2022-04-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 148 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 12:00Z on 2022-04-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 265 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
148 J/kg
Mixed-layer CIN
-401 J/kg
Mixed-layer LCL
887 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
265 m²/s²
0-3 km storm-relative helicity
342 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 30, 2:19 PM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 16 more2 hr
Apr 30, 3:52 PM CDTSevere Thunderstorm WatchSPCArkansas, Bradley, Calhoun, Clark, Clay, Cleburne and 38 more9 hr
Apr 30, 6:41 PM CDTMesoscale DiscussionSPCArkansas, Bradley, Calhoun, Cleveland, Columbia, Cross and 13 more94 min
Apr 30, 12:32 PM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, Cass, Christian, DeKalb and 33 more118 min
Apr 30, 1:46 PM CDTTornado WatchSPCBoone, Bureau, Carroll, Champaign, Christian, Clark and 49 more8 hr
Apr 30, 2:03 PM CDTTornado WatchSPCAlexander, Bond, Clinton, Fayette, Franklin, Jackson and 11 more8 hr
Apr 30, 2:43 PM CDTMesoscale DiscussionSPCRock Island92 min
Apr 30, 3:20 PM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, DeKalb, DuPage, Ford and 25 more85 min
Apr 30, 3:57 PM CDTMesoscale DiscussionSPCClinton, Madison, Monroe, Perry, Randolph, Saint Clair and 1 more63 min
Apr 30, 5:27 PM CDTMesoscale DiscussionSPCAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 14 more2 hr
Apr 30, 6:02 PM CDTMesoscale DiscussionSPCBoone, Champaign, Christian, Coles, Cook, DeKalb and 28 more118 min
Apr 29, 8:05 PM CDTMesoscale DiscussionSPCAndrew, Buchanan, Caldwell, Carroll, Cass, Clay and 15 more55 min
Apr 29, 8:34 PM CDTSevere Thunderstorm WatchSPCAndrew, Atchison, Bates, Buchanan, Caldwell, Carroll and 19 more4 hr
Apr 29, 8:58 PM CDTMesoscale DiscussionSPCBarton, Vernon2 hr
Apr 29, 10:32 PM CDTSevere Thunderstorm WatchSPCBarry, Barton, Benton, Cedar, Christian, Dade and 12 more5 hr
Apr 29, 11:34 PM CDTMesoscale DiscussionSPCCaldwell, Carroll, Chariton, Daviess, Grundy, Harrison and 9 more86 min
Apr 30, 12:48 AM CDTMesoscale DiscussionSPCBarton, Dade, Jasper, Lawrence, McDonald, Newton87 min

Nearby

Mesoscale Discussions in Missouri, 2022Mesoscale Discussions in Arkansas, 2022Mesoscale Discussions in Illinois, 2022Every mesoscale discussion in 2022

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.