Alert archive / Illinois / Mesoscale Discussions in 2020

Mesoscale Discussion 240

March 27, 202016 counties in Illinois; 6 counties in Indiana; 5 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Mar 27, 2020, 8:02 PM CDT for 16 counties in Illinois; 6 counties in Indiana; 5 counties in Missouri. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued
Mar 27, 2020, 8:02 PM CDT (01:02 UTC)
Expired
Mar 27, 2020, 9:30 PM CDT
In force
88 min
Issued by
the Storm Prediction Center
All 27 counties

Edwards County, IL, Franklin County, IL, Hamilton County, IL, Jackson County, IL, Jefferson County, IL, Lawrence County, IL, Perry County, IL, Randolph County, IL, Richland County, IL, Saline County, IL, Union County, IL, Wabash County, IL, Washington County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Gibson County, IN, Knox County, IN, Pike County, IN, Posey County, IN, Vanderburgh County, IN, Warrick County, IN, Bollinger County, MO, Cape Girardeau County, MO, Madison County, MO, Perry County, MO, Sainte Genevieve County, MO

The radar

The Paducah radar (KPAH), 94 km from the middle of the area, began a volume at 01:03 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

Lincoln, IL (KILX), launched 00:00Z, 1.0 hours before the alert went out and 257 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 00:00Z on 2020-03-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 00:00Z on 2020-03-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 371 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
626 m above ground
0-6 km bulk shear
85 kt
0-1 km storm-relative helicity
371 m²/s²
0-3 km storm-relative helicity
383 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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 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, 1:17 PM CDTMesoscale DiscussionSPCAlexander, Bond, Clark, Clay, Clinton, Crawford and 34 more88 min
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, 4:59 PM CDTMesoscale DiscussionSPCGallatin, Hamilton, Hardin, Johnson, Massac, Pope and 2 more61 min
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, 12:42 PM CDTSevere Thunderstorm WatchSPCAdams, Bartholomew, Blackford, Boone, Brown, Carroll and 51 more6 hr
Mar 28, 3:03 PM CDTMesoscale DiscussionSPCBlackford, Boone, Clinton, Delaware, Fayette, Grant and 14 more87 min
Mar 28, 6:34 PM CDTTornado WatchSPCGibson, Pike, Posey, Spencer, Vanderburgh, Warrick7 hr
Mar 28, 6:44 PM CDTMesoscale DiscussionSPCBartholomew, Boone, Brown, Clay, Dearborn, Decatur and 24 more61 min
Mar 28, 7:05 AM CDTMesoscale DiscussionSPCBarry, Barton, Bates, Benton, Boone, Camden and 27 more85 min
Mar 28, 2:10 PM CDTTornado WatchSPCDunklin, Pemiscot5 hr
Mar 28, 2:56 PM CDTMesoscale DiscussionSPCDunklin, Pemiscot94 min

Nearby

Mesoscale Discussions in Illinois, 2020Mesoscale Discussions in Indiana, 2020Mesoscale Discussions in Missouri, 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.