Alert archive / Kansas / Mesoscale Discussions in 2020

Mesoscale Discussion 1017

June 26, 20204 states

The Storm Prediction Center issued this mesoscale discussion at Jun 26, 2020, 10:41 PM CDT for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jun 26, 2020, 10:41 PM CDT (03:41 UTC)
Expired
Jun 27, 2020, 12:45 AM CDT
In force
2 hr
Issued by
the Storm Prediction Center
Concerning
Severe thunderstorm watch 309
All 71 counties

Appanoose County, IA, Decatur County, IA, Fremont County, IA, Monroe County, IA, Page County, IA, Ringgold County, IA, Taylor County, IA, Wayne County, IA, Atchison County, KS, Brown County, KS, Clay County, KS, Cloud County, KS, Decatur County, KS, Doniphan County, KS, Ellis County, KS, Gove County, KS, Graham County, KS, Hamilton County, KS, Jackson County, KS, Jewell County, KS, Lane County, KS, Lincoln County, KS, Logan County, KS, Marshall County, KS, Mitchell County, KS, Nemaha County, KS, Norton County, KS, Osborne County, KS, Ottawa County, KS, Phillips County, KS, Pottawatomie County, KS, Republic County, KS, Riley County, KS, Rooks County, KS, Russell County, KS, Scott County, KS, Sheridan County, KS, Smith County, KS, Thomas County, KS, Trego County, KS, Washington County, KS, Wichita County, KS, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Mercer County, MO, Nodaway County, MO, Putnam County, MO, Sullivan County, MO, Worth County, MO, Franklin County, NE, Furnas County, NE, Gage County, NE, Harlan County, NE, Jefferson County, NE, Johnson County, NE, Nemaha County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Red Willow County, NE, Richardson County, NE, Saline County, NE, Thayer County, NE, Webster County, NE

The radar

The Grand Island radar (KUEX), 87 km from the middle of the area, began a volume at 03:43 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

Omaha, NE (KOAX), launched 00:00Z, 3.7 hours before the alert went out and 193 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 00:00Z on 2020-06-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1803 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 00:00Z on 2020-06-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 2 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
1803 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
1399 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
2 m²/s²
0-3 km storm-relative helicity
126 m²/s²
Significant tornado parameter
0.4
Supercell composite
6.7

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 26, 7:50 PM CDTSevere Thunderstorm WatchSPCAdams, Appanoose, Clarke, Davis, Decatur, Fremont and 10 more8 hr
Jun 26, 8:13 PM CDTMesoscale DiscussionSPCCheyenne, Greeley, Rawlins, Sherman, Thomas, Wallace2 hr
Jun 27, 1:28 AM CDTMesoscale DiscussionSPCAtchison, Barton, Brown, Clay, Cloud, Dickinson and 50 more2 hr
Jun 27, 3:22 AM CDTMesoscale DiscussionSPCChase, Dickinson, Douglas, Ellsworth, Franklin, Geary and 14 more53 min
Jun 27, 6:01 PM CDTMesoscale DiscussionSPCCheyenne, Decatur, Finney, Ford, Gove, Graham and 21 more119 min

Nearby

Mesoscale Discussions in Kansas, 2020Mesoscale Discussions in Nebraska, 2020Mesoscale Discussions in Missouri, 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.