Alert archive / Kansas / Mesoscale Discussions in 2018

Mesoscale Discussion 463

May 19, 201823 counties in Kansas; 9 counties in Missouri; Pawnee County, Richardson County, Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 19, 2018, 1:42 PM CDT for 23 counties in Kansas; 9 counties in Missouri; Pawnee County, Richardson County, Nebraska. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
May 19, 2018, 1:42 PM CDT (18:42 UTC)
Expired
May 19, 2018, 4:15 PM CDT
In force
3 hr
Issued by
the Storm Prediction Center
Chance of a watch
80%
All 34 counties

Atchison County, KS, Brown County, KS, Clay County, KS, Cloud County, KS, Dickinson County, KS, Doniphan County, KS, Douglas County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Leavenworth County, KS, Marion County, KS, Marshall County, KS, Morris County, KS, Nemaha County, KS, Ottawa County, KS, Pottawatomie County, KS, Riley County, KS, Saline County, KS, Shawnee County, KS, Wabaunsee County, KS, Washington County, KS, Wyandotte County, KS, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Clay County, MO, Clinton County, MO, DeKalb County, MO, Holt County, MO, Nodaway County, MO, Platte County, MO, Pawnee County, NE, Richardson County, NE

The radar

The Topeka radar (KTWX), 53 km from the middle of the area, began a volume at 18:48 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 (KFOE), launched 12:00Z, 6.7 hours before the alert went out and 75 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 12:00Z on 2018-05-19Temperature 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 12:00Z on 2018-05-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 140 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1694 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
140 m²/s²
0-3 km storm-relative helicity
274 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 18, 8:39 PM CDTSevere Thunderstorm WatchSPCBarton, Butler, Cowley, Ellsworth, Harper, Harvey and 16 more5 hr
May 18, 9:08 PM CDTMesoscale DiscussionSPCBarber, Cheyenne, Clark, Comanche, Decatur, Edwards and 33 more67 min
May 18, 11:14 PM CDTMesoscale DiscussionSPCBarber, Barton, Butler, Cheyenne, Clark, Comanche and 50 more46 min
May 19, 7:50 AM CDTMesoscale DiscussionSPCAllen, Anderson, Bourbon, Chautauqua, Cherokee, Coffey and 10 more115 min
May 19, 12:39 PM CDTMesoscale DiscussionSPCChautauqua, Cowley, Elk, Harper, Montgomery, Sumner and 1 more3 hr
May 19, 2:30 PM CDTSevere Thunderstorm WatchSPCAllen, Bourbon, Butler, Chase, Chautauqua, Cherokee and 15 more11 hr
May 19, 4:21 PM CDTSevere Thunderstorm WatchSPCAnderson, Atchison, Coffey, Douglas, Franklin, Geary and 12 more3 hr
May 19, 6:11 PM CDTMesoscale DiscussionSPCAllen, Bourbon, Chautauqua, Cherokee, Crawford, Labette and 3 more2 hr
May 19, 11:56 AM CDTMesoscale DiscussionSPCButler, Carter, Dent, Douglas, Howell, Laclede and 12 more2 hr
May 19, 1:36 PM CDTSevere Thunderstorm WatchSPCButler, Carter, Dent, Douglas, Dunklin, Howell and 12 more6 hr
May 19, 3:35 PM CDTMesoscale DiscussionSPCButler, Carter, Dunklin, Mississippi, New Madrid, Oregon and 5 more85 min
May 19, 6:14 PM CDTMesoscale DiscussionSPCDunklin, Mississippi, New Madrid, Pemiscot, Scott61 min

Nearby

Mesoscale Discussions in Kansas, 2018Mesoscale Discussions in Missouri, 2018Mesoscale Discussions in Nebraska, 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.