Alert archive / Kansas / Mesoscale Discussions in 2017

Mesoscale Discussion 857

May 27, 201727 counties in Kansas

The Storm Prediction Center issued this mesoscale discussion at May 27, 2017, 3:35 AM CDT for 27 counties in Kansas. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued
May 27, 2017, 3:35 AM CDT (08:35 UTC)
Expired
May 27, 2017, 5:30 AM CDT
In force
115 min
Issued by
the Storm Prediction Center
All 27 counties

Barton County, KS, Clay County, KS, Cloud County, KS, Dickinson County, KS, Ellis County, KS, Ellsworth County, KS, Geary County, KS, Jackson County, KS, Lincoln County, KS, Lyon County, KS, Marion County, KS, McPherson County, KS, Mitchell County, KS, Morris County, KS, Osage County, KS, Osborne County, KS, Ottawa County, KS, Pottawatomie County, KS, Riley County, KS, Rooks County, KS, Rush County, KS, Russell County, KS, Saline County, KS, Shawnee County, KS, Smith County, KS, Trego County, KS, Wabaunsee County, KS

The radar

The Topeka radar (KTWX), 133 km from the middle of the area, began a volume at 08:39 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

Topeka, KS (KFOE), launched 00:00Z, 8.6 hours before the alert went out and 184 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, Topeka, KS at 00:00Z on 2017-05-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1227 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, Topeka, KS at 00:00Z on 2017-05-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 38 square meters per square second.19395878Sfc1 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
1227 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
1654 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
38 m²/s²
0-3 km storm-relative helicity
110 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.8

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
May 26, 7:38 PM CDTSevere Thunderstorm WatchSPCCheyenne, Decatur, Finney, Gove, Graham, Greeley and 12 more7 hr
May 26, 10:03 PM CDTMesoscale DiscussionSPCCheyenne, Gove, Lane, Logan, Rawlins, Scott and 5 more117 min
May 26, 11:45 PM CDTMesoscale DiscussionSPCCheyenne, Decatur, Ellis, Gove, Graham, Logan and 12 more2 hr
May 27, 12:52 AM CDTSevere Thunderstorm WatchSPCBarton, Ellis, Ellsworth, Jewell, Lincoln, Mitchell and 8 more5 hr
May 27, 1:47 AM CDTMesoscale DiscussionSPCCheyenne, Decatur, Gove, Graham, Greeley, Lane and 10 more88 min
May 27, 9:59 AM CDTMesoscale DiscussionSPCAllen, Anderson, Bourbon, Butler, Chase, Chautauqua and 20 more2 hr
May 27, 12:13 PM CDTTornado WatchSPCBourbon, Cherokee, Crawford, Johnson, Linn, Miami7 hr
May 27, 1:12 PM CDTMesoscale DiscussionSPCBourbon, Cherokee, Crawford, Linn, Miami, Neosho93 min
May 27, 2:45 PM CDTMesoscale DiscussionSPCGrant, Hamilton, Haskell, Kearny, Morton, Seward and 2 more2 hr
May 27, 2:46 PM CDTMesoscale DiscussionSPCAllen, Anderson, Bourbon, Coffey, Greenwood, Neosho and 1 more59 min
May 27, 5:27 PM CDTSevere Thunderstorm WatchSPCGrant, Hamilton, Haskell, Kearny, Morton, Seward and 2 more6 hr

Nearby

Mesoscale Discussions in Kansas, 2017Every mesoscale discussion in 2017

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.