Alert archive / Missouri / Mesoscale Discussions in 2018

Mesoscale Discussion 739

June 14, 2018Alexander County, Pulaski County, Union County, Illinois; Ballard County, Fulton County, Kentucky; 10 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Jun 14, 2018, 8:38 PM CDT for Alexander County, Pulaski County, Union County, Illinois; Ballard County, Fulton County, Kentucky; 10 counties in Missouri. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued
Jun 14, 2018, 8:38 PM CDT (01:38 UTC)
Expired
Jun 14, 2018, 10:15 PM CDT
In force
97 min
Issued by
the Storm Prediction Center
Chance of a watch
5%

Counties Alexander County, IL, Pulaski County, IL, Union County, IL, Ballard County, KY, Fulton County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Madison County, MO, Mississippi County, MO, New Madrid County, MO, Perry County, MO, Scott County, MO, Stoddard County, MO, Wayne County, MO

The radar

The Paducah radar (KPAH), 93 km from the middle of the area, began a volume at 01:38 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

Springfield, MO (KSGF), launched 00:00Z, 1.6 hours before the alert went out and 354 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, Springfield, MO at 00:00Z on 2018-06-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2449 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, Springfield, MO at 00:00Z on 2018-06-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 1 square meters per square second.1939Sfc1 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
2449 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
1704 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
1 m²/s²
0-3 km storm-relative helicity
35 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 Missouri, 2018Mesoscale Discussions in Illinois, 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.