Alert archive / Missouri / Mesoscale Discussions in 2020

Mesoscale Discussion 250

March 28, 20204 states

The Storm Prediction Center issued this mesoscale discussion at Mar 28, 2020, 1:17 PM CDT for 4 states. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued
Mar 28, 2020, 1:17 PM CDT (18:17 UTC)
Expired
Mar 28, 2020, 2:45 PM CDT
In force
88 min
Issued by
the Storm Prediction Center
Chance of a watch
95%
All 89 counties

Clay County, AR, Randolph County, AR, Alexander County, IL, Bond County, IL, Clark County, IL, Clay County, IL, Clinton County, IL, Crawford County, IL, Cumberland County, IL, Edwards County, IL, Effingham County, IL, Fayette County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jackson County, IL, Jasper County, IL, Jefferson County, IL, Jersey County, IL, Johnson County, IL, Lawrence County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Massac County, IL, Monroe County, IL, Montgomery County, IL, Perry County, IL, Pope County, IL, Pulaski County, IL, Randolph County, IL, Richland County, IL, Saint Clair County, IL, Saline County, IL, Shelby County, IL, Union County, IL, Wabash County, IL, Washington County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Ballard County, KY, Carlisle County, KY, Fulton County, KY, Hickman County, KY, Livingston County, KY, McCracken County, KY, Bollinger County, MO, Butler County, MO, Camden County, MO, Cape Girardeau County, MO, Carter County, MO, City of Saint Louis, MO, Cole County, MO, Crawford County, MO, Dent County, MO, Franklin County, MO, Gasconade County, MO, Howell County, MO, Iron County, MO, Jefferson County, MO, Laclede County, MO, Lincoln County, MO, Madison County, MO, Maries County, MO, Miller County, MO, Mississippi County, MO, Montgomery County, MO, New Madrid County, MO, Oregon County, MO, Osage County, MO, Perry County, MO, Phelps County, MO, Pulaski 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, Texas County, MO, Warren County, MO, Washington County, MO, Wayne County, MO, Wright County, MO

The radar

The St Louis radar (KLSX), 108 km from the middle of the area, began a volume at 18:16 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

Lincoln, IL (KILX), launched 12:00Z, 6.3 hours before the alert went out and 271 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, Lincoln, IL at 12:00Z on 2020-03-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 638 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, Lincoln, IL at 12:00Z on 2020-03-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 159 square meters per square second.1939587897117136Sfc1 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
638 J/kg
Mixed-layer CIN
-76 J/kg
Mixed-layer LCL
812 m above ground
0-6 km bulk shear
84 kt
0-1 km storm-relative helicity
159 m²/s²
0-3 km storm-relative helicity
222 m²/s²
Significant tornado parameter
0.6
Supercell composite
2.0

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
Mar 28, 12:14 PM CDTMesoscale DiscussionSPCArkansas, Bradley, Calhoun, Clark, Cleburne, Cleveland and 42 more2 hr
Mar 28, 2:10 PM CDTTornado WatchSPCArkansas, Baxter, Bradley, Calhoun, Clark, Clay and 42 more5 hr
Mar 28, 2:56 PM CDTMesoscale DiscussionSPCArkansas, Bradley, Calhoun, Clay, Cleburne, Cleveland and 34 more94 min
Mar 28, 4:59 PM CDTMesoscale DiscussionSPCCrittenden, Lee, Mississippi, Phillips, St. Francis61 min
Mar 28, 6:34 PM CDTTornado WatchSPCAshley, Chicot, Crittenden, Cross, Lee, Mississippi and 2 more7 hr
Mar 27, 8:02 PM CDTMesoscale DiscussionSPCEdwards, Franklin, Hamilton, Jackson, Jefferson, Lawrence and 10 more88 min
Mar 27, 8:33 PM CDTMesoscale DiscussionSPCCalhoun87 min
Mar 27, 10:16 PM CDTSevere Thunderstorm WatchSPCBond, Calhoun, Christian, Effingham, Fayette, Greene and 9 more6 hr
Mar 27, 11:46 PM CDTMesoscale DiscussionSPCBond, Calhoun, Christian, Fayette, Greene, Jersey and 8 more89 min
Mar 28, 1:34 AM CDTMesoscale DiscussionSPCCarroll, Henry, Jo Daviess, Mercer, Rock Island, Whiteside56 min
Mar 28, 10:18 AM CDTMesoscale DiscussionSPCChampaign, Christian, DeWitt, Douglas, Ford, Iroquois and 8 more2 hr
Mar 28, 1:33 PM CDTMesoscale DiscussionSPCAdams, Hancock, Henderson117 min
Mar 28, 2:45 PM CDTTornado Watch PDSSPCAdams, Brown, Bureau, Calhoun, Cass, Champaign and 44 more6 hr
Mar 28, 3:53 PM CDTTornado WatchSPCAlexander, Bond, Clark, Clay, Clinton, Crawford and 30 more5 hr
Mar 28, 5:21 PM CDTMesoscale DiscussionSPCBrown, Fulton, Hancock, Henderson, Henry, Knox and 7 more84 min
Mar 28, 6:42 PM CDTMesoscale DiscussionSPCCarroll, Jo Daviess, Stephenson93 min
Mar 28, 7:05 AM CDTMesoscale DiscussionSPCBarry, Barton, Bates, Benton, Boone, Camden and 27 more85 min

Nearby

Mesoscale Discussions in Missouri, 2020Mesoscale Discussions in Illinois, 2020Mesoscale Discussions in Kentucky, 2020Every mesoscale discussion in 2020

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.