Alert archive / Indiana / Mesoscale Discussions in 2020

Mesoscale Discussion 248

March 28, 202014 counties in Illinois; 18 counties in Indiana

The Storm Prediction Center issued this mesoscale discussion at Mar 28, 2020, 10:18 AM CDT for 14 counties in Illinois; 18 counties in Indiana. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Mar 28, 2020, 10:18 AM CDT (15:18 UTC)
Expired
Mar 28, 2020, 12:45 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
40%
All 32 counties

Champaign County, IL, Christian County, IL, DeWitt County, IL, Douglas County, IL, Ford County, IL, Iroquois County, IL, Logan County, IL, Macon County, IL, Mason County, IL, McLean County, IL, Menard County, IL, Piatt County, IL, Sangamon County, IL, Vermilion County, IL, Benton County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clinton County, IN, Fountain County, IN, Grant County, IN, Hamilton County, IN, Howard County, IN, Madison County, IN, Miami County, IN, Montgomery County, IN, Tippecanoe County, IN, Tipton County, IN, Vermillion County, IN, Wabash County, IN, Warren County, IN, White County, IN

The radar

The Lincoln radar (KILX), 102 km from the middle of the area, began a volume at 15:21 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, 3.3 hours before the alert went out and 41 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 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, 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

Nearby

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