Alert archive / Illinois / Mesoscale Discussions in 2018

Mesoscale Discussion 381

May 10, 20188 counties in Illinois; 8 counties in Indiana; 7 counties in Kentucky

The Storm Prediction Center issued this mesoscale discussion at May 10, 2018, 6:36 PM CDT for 8 counties in Illinois; 8 counties in Indiana; 7 counties in Kentucky. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued
May 10, 2018, 6:36 PM CDT (23:36 UTC)
Expired
May 10, 2018, 8:00 PM CDT
In force
84 min
Issued by
the Storm Prediction Center
Chance of a watch
5%
All 23 counties

Clay County, IL, Edwards County, IL, Jefferson County, IL, Marion County, IL, Richland County, IL, Wabash County, IL, Wayne County, IL, White County, IL, Dubois County, IN, Gibson County, IN, Perry County, IN, Pike County, IN, Posey County, IN, Spencer County, IN, Vanderburgh County, IN, Warrick County, IN, Breckinridge County, KY, Daviess County, KY, Grayson County, KY, Hancock County, KY, Henderson County, KY, Meade County, KY, Ohio County, KY

The radar

The Evansville,IN radar (KVWX), 7 km from the middle of the area, began a volume at 23:39 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 12:00Z, 11.6 hours before the alert went out and 216 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 2018-05-10Temperature 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 12:00Z on 2018-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 56 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1846 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
56 m²/s²
0-3 km storm-relative helicity
144 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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Nearby

Mesoscale Discussions in Illinois, 2018Mesoscale Discussions in Indiana, 2018Mesoscale Discussions in Kentucky, 2018Every mesoscale discussion in 2018

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.