Alert archive / Kansas / Mesoscale Discussions in 2018

Mesoscale Discussion 313

May 2, 201821 counties in Kansas; 15 counties in Oklahoma; 14 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 2, 2018, 11:36 AM CDT for 21 counties in Kansas; 15 counties in Oklahoma; 14 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 2, 2018, 11:36 AM CDT (16:36 UTC)
Expired
May 2, 2018, 2:00 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
95%
All 50 counties

Barber County, KS, Chase County, KS, Clark County, KS, Comanche County, KS, Dickinson County, KS, Edwards County, KS, Ellsworth County, KS, Harper County, KS, Harvey County, KS, Kingman County, KS, Kiowa County, KS, Marion County, KS, McPherson County, KS, Morris County, KS, Pratt County, KS, Reno County, KS, Rice County, KS, Saline County, KS, Sedgwick County, KS, Stafford County, KS, Sumner County, KS, Alfalfa County, OK, Beaver County, OK, Beckham County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Jackson County, OK, Major County, OK, Roger Mills County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Armstrong County, TX, Briscoe County, TX, Carson County, TX, Childress County, TX, Collingsworth County, TX, Donley County, TX, Gray County, TX, Hall County, TX, Hemphill County, TX, Hutchinson County, TX, Lipscomb County, TX, Ochiltree County, TX, Roberts County, TX, Wheeler County, TX

The radar

The Vance AFB radar (KVNX), 103 km from the middle of the area, began a volume at 16:40 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

Dodge City, (KDDC), launched 12:00Z, 4.6 hours before the alert went out and 155 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, Dodge City, at 12:00Z on 2018-05-02Temperature 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, Dodge City, at 12:00Z on 2018-05-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 87 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2321 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
87 m²/s²
0-3 km storm-relative helicity
117 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 1, 7:24 PM CDTMesoscale DiscussionSPCBarber, Barton, Brown, Clay, Cloud, Dickinson and 25 more2 hr
May 1, 9:06 PM CDTMesoscale DiscussionSPCAtchison, Barton, Brown, Butler, Chase, Clay and 33 more54 min
May 2, 12:43 PM CDTTornado WatchSPCAnderson, Barber, Barton, Brown, Butler, Chase and 51 more9 hr
May 2, 2:47 PM CDTMesoscale DiscussionSPCEdwards, Kiowa, McPherson, Rice, Stafford118 min
May 2, 5:08 PM CDTMesoscale DiscussionSPCAtchison, Brown, Doniphan, Jackson, Jefferson, Marshall and 1 more97 min
May 2, 5:18 PM CDTMesoscale DiscussionSPCAtchison, Barber, Brown, Butler, Chase, Clay and 28 more87 min
May 2, 5:27 PM CDTTornado WatchSPCAtchison, Doniphan, Johnson, Leavenworth, Linn, Miami and 1 more8 hr
May 2, 12:59 PM CDTTornado WatchSPCAlfalfa, Beaver, Beckham, Blaine, Caddo, Canadian and 32 more9 hr
May 2, 3:24 PM CDTMesoscale DiscussionSPCAlfalfa, Beckham, Blaine, Caddo, Canadian, Comanche and 21 more3 hr
May 2, 6:10 PM CDTMesoscale DiscussionSPCAlfalfa, Blaine, Caddo, Canadian, Cleveland, Comanche and 16 more95 min
May 2, 3:13 PM CDTMesoscale DiscussionSPCCoke, Concho, Crockett, Edwards, Glasscock, Irion and 12 more2 hr
May 2, 4:41 PM CDTSevere Thunderstorm WatchSPCBrown, Callahan, Coke, Coleman, Concho, Crockett and 36 more9 hr

Nearby

Mesoscale Discussions in Kansas, 2018Mesoscale Discussions in Oklahoma, 2018Mesoscale Discussions in Texas, 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.