Alert archive / Kentucky / Mesoscale Discussions in 2025

Mesoscale Discussion 402

April 4, 20254 states

The Storm Prediction Center issued this mesoscale discussion at Apr 4, 2025, 9:23 PM CDT for 4 states. It was in force for 67 min.

The area

The outline as issued.

The facts

Issued
Apr 4, 2025, 9:23 PM CDT (02:23 UTC)
Expired
Apr 4, 2025, 10:30 PM CDT
In force
67 min
Issued by
the Storm Prediction Center
Concerning
Severe potential...watch likely
Chance of a watch
95%
All 54 counties

Alexander County, IL, Edwards County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Johnson County, IL, Massac County, IL, Pope County, IL, Pulaski County, IL, Saline County, IL, Union County, IL, Wabash County, IL, White County, IL, Williamson County, IL, Crawford County, IN, Daviess County, IN, Dubois County, IN, Gibson County, IN, Knox County, IN, Martin County, IN, Orange County, IN, Perry County, IN, Pike County, IN, Posey County, IN, Spencer County, IN, Vanderburgh County, IN, Warrick County, IN, Ballard County, KY, Breckinridge County, KY, Caldwell County, KY, Carlisle County, KY, Christian County, KY, Crittenden County, KY, Daviess County, KY, Graves County, KY, Hancock County, KY, Henderson County, KY, Hickman County, KY, Hopkins County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, McLean County, KY, Muhlenberg County, KY, Ohio County, KY, Todd County, KY, Trigg County, KY, Union County, KY, Webster County, KY, Mississippi County, MO, New Madrid County, MO, Scott County, MO

The radar

The Evansville,IN radar (KVWX), 87 km from the middle of the area, began a volume at 02:22 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 00:00Z, 2.4 hours before the alert went out and 302 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 2025-04-05Temperature 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 2025-04-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 832 square meters per square second.1939587897Sfc1 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
599 m above ground
0-6 km bulk shear
88 kt
0-1 km storm-relative helicity
832 m²/s²
0-3 km storm-relative helicity
1207 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 4, 9:41 PM CDTTornado WatchSPCAlexander, Gallatin, Hardin, Johnson, Massac, Pope and 2 more5 hr
Apr 4, 11:35 PM CDTMesoscale DiscussionSPCHardin, Massac115 min
Apr 5, 1:03 PM CDTMesoscale DiscussionSPCAlexander, Hardin, Massac, Pope, Pulaski87 min
Apr 5, 1:43 PM CDTTornado WatchSPCAdair, Allen, Barren, Butler, Calloway, Casey and 17 more7 hr
Apr 5, 2:34 PM CDTMesoscale DiscussionSPCAllen, Calloway, Christian, Logan, Simpson, Todd and 2 more116 min
Apr 5, 5:42 PM CDTMesoscale DiscussionSPCAdair, Bell, Casey, Clay, Clinton, Cumberland and 15 more63 min
Apr 5, 6:13 PM CDTTornado WatchSPCClay, Jackson, Knox, Laurel, McCreary, Owsley and 4 more2 hr
Apr 4, 8:50 PM CDTTornado WatchSPCDunklin, Pemiscot9 hr
Apr 4, 11:16 PM CDTMesoscale DiscussionSPCDunklin119 min

Nearby

Mesoscale Discussions in Kentucky, 2025Mesoscale Discussions in Illinois, 2025Mesoscale Discussions in Indiana, 2025Every mesoscale discussion in 2025

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.