Alert archive / Kansas / Mesoscale Discussions in 2020

Mesoscale Discussion 527

May 4, 202044 counties in Kansas; 6 counties in Missouri; 4 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 4, 2020, 5:50 AM CDT for 44 counties in Kansas; 6 counties in Missouri; 4 counties in Nebraska. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued
May 4, 2020, 5:50 AM CDT (10:50 UTC)
Expired
May 4, 2020, 6:45 AM CDT
In force
55 min
Issued by
the Storm Prediction Center
Chance of a watch
80%
All 54 counties

Allen County, KS, Anderson County, KS, Bourbon County, KS, Butler County, KS, Chase County, KS, Cherokee County, KS, Clay County, KS, Cloud County, KS, Coffey County, KS, Crawford County, KS, Dickinson County, KS, Elk County, KS, Ellsworth County, KS, Franklin County, KS, Geary County, KS, Greenwood County, KS, Harvey County, KS, Jewell County, KS, Labette County, KS, Lincoln County, KS, Linn County, KS, Lyon County, KS, Marion County, KS, McPherson County, KS, Miami County, KS, Mitchell County, KS, Morris County, KS, Neosho County, KS, Osage 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, Saline County, KS, Shawnee County, KS, Smith County, KS, Wabaunsee County, KS, Washington County, KS, Wilson County, KS, Woodson County, KS, Barton County, MO, Bates County, MO, Cedar County, MO, Jasper County, MO, Newton County, MO, Vernon County, MO, Franklin County, NE, Harlan County, NE, Nuckolls County, NE, Webster County, NE

The radar

The Topeka radar (KTWX), 60 km from the middle of the area, began a volume at 10:49 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

Topeka, KS (KTOP), launched 00:00Z, 10.8 hours before the alert went out and 106 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 2020-05-04Temperature 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, Topeka, KS at 00:00Z on 2020-05-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -21 square meters per square second.1939587897Sfc1 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
2322 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
-21 m²/s²
0-3 km storm-relative helicity
7 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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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 4, 1:39 AM CDTMesoscale DiscussionSPCCheyenne, Decatur, Graham, Norton, Phillips, Rawlins and 5 more3 hr
May 4, 6:33 AM CDTSevere Thunderstorm WatchSPCAllen, Anderson, Atchison, Barton, Bourbon, Brown and 49 more12 hr
May 4, 9:00 AM CDTMesoscale DiscussionSPCAllen, Anderson, Atchison, Bourbon, Chase, Cherokee and 32 more90 min
May 4, 10:38 AM CDTMesoscale DiscussionSPCAllen, Anderson, Bourbon, Cherokee, Coffey, Crawford and 15 more97 min
May 4, 1:21 PM CDTMesoscale DiscussionSPCCherokee, Crawford, Labette, Montgomery114 min
May 4, 2:32 PM CDTTornado WatchSPCChautauqua, Cherokee, Labette, Montgomery9 hr
May 4, 1:04 PM CDTMesoscale DiscussionSPCBarton, Benton, Camden, Carter, Cedar, Christian and 29 more86 min
May 4, 2:02 PM CDTMesoscale DiscussionSPCButler, Carter, Dunklin, Mississippi, New Madrid, Pemiscot and 4 more118 min
May 4, 2:58 PM CDTSevere Thunderstorm WatchSPCBollinger, Butler, Cape Girardeau, Carter, Dunklin, Iron and 9 more6 hr
May 4, 3:44 PM CDTMesoscale DiscussionSPCButler, Carter, Dunklin, Howell, New Madrid, Oregon and 3 more61 min
May 4, 6:21 PM CDTMesoscale DiscussionSPCDunklin, New Madrid, Pemiscot54 min
May 4, 6:42 PM CDTMesoscale DiscussionSPCBarry, Christian, Dade, Greene, Jasper, Lawrence and 4 more2 hr

Nearby

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