Alert archive / Kansas / Mesoscale Discussions in 2018

Mesoscale Discussion 707

June 11, 201814 counties in Kansas

The Storm Prediction Center issued this mesoscale discussion at Jun 11, 2018, 3:41 PM CDT for 14 counties in Kansas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jun 11, 2018, 3:41 PM CDT (20:41 UTC)
Expired
Jun 11, 2018, 5:45 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
40%

Counties Barton County, KS, Clay County, KS, Cloud County, KS, Dickinson County, KS, Ellsworth County, KS, Lincoln County, KS, McPherson County, KS, Ottawa County, KS, Reno County, KS, Republic County, KS, Rice County, KS, Saline County, KS, Stafford County, KS, Washington County, KS

The radar

The Wichita radar (KICT), 120 km from the middle of the area, began a volume at 20:45 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

Omaha, NE (KOAX), launched 12:00Z, 8.7 hours before the alert went out and 317 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, Omaha, NE at 12:00Z on 2018-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1072 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, Omaha, NE at 12:00Z on 2018-06-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 312 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
1072 J/kg
Mixed-layer CIN
-356 J/kg
Mixed-layer LCL
1255 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
312 m²/s²
0-3 km storm-relative helicity
463 m²/s²
Significant tornado parameter
0.0
Supercell composite
6.2

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
Jun 11, 6:12 PM CDTSevere Thunderstorm WatchSPCAllen, Anderson, Atchison, Brown, Butler, Chase and 39 more8 hr

Nearby

Mesoscale Discussions in Kansas, 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.