Alert archive / Missouri / Severe Thunderstorm Watches in 2019

Severe Thunderstorm Watch 421

June 21, 201916 counties in Kansas; 30 counties in Missouri; Pawnee County, Richardson County, Nebraska

The Storm Prediction Center issued this severe thunderstorm watch at Jun 21, 2019, 7:01 PM CDT for 16 counties in Kansas; 30 counties in Missouri; Pawnee County, Richardson County, Nebraska. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Jun 21, 2019, 7:01 PM CDT (00:01 UTC)
Expired
Jun 22, 2019, 1:59 AM CDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt
All 48 counties

Atchison County, KS, Brown County, KS, Doniphan County, KS, Douglas County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Johnson County, KS, Leavenworth County, KS, Marshall County, KS, Nemaha County, KS, Pottawatomie County, KS, Riley County, KS, Shawnee County, KS, Wabaunsee County, KS, Wyandotte County, KS, Adair County, MO, Andrew County, MO, Buchanan County, MO, Caldwell County, MO, Carroll County, MO, Chariton County, MO, Clay County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Howard County, MO, Jackson County, MO, Lafayette County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Mercer County, MO, Nodaway County, MO, Platte County, MO, Putnam County, MO, Randolph County, MO, Ray County, MO, Saline County, MO, Schuyler County, MO, Sullivan County, MO, Worth County, MO, Pawnee County, NE, Richardson County, NE

The radar

The Pleasant Hill radar (KEAX), 118 km from the middle of the area, began a volume at 00:03 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.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
20%
One or more EF2 to EF5 tornadoes
10%
Ten or more severe wind reports
50%
One or more gusts of 65 knots or more
20%
Ten or more severe hail reports
40%
One or more hailstones of 2 inches or more
30%
Six or more combined severe hail and wind reports
90%

Warnings issued inside it

6 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jun 21, 7:22 PM CDTSevere Thunderstorm WarningTOPMarshall, Nemaha38 min
Jun 21, 7:53 PM CDTFlash Flood WarningTOPMarshall, Nemaha4 hr
Jun 21, 8:22 PM CDTSevere Thunderstorm WarningTOPMarshall, Nemaha38 min
Jun 21, 8:27 PM CDTTornado WarningTOPMarshall, Nemaha33 min
Jun 21, 8:55 PM CDTSevere Thunderstorm WarningTOPJackson, Marshall, Nemaha, Pottawatomie39 min
Jun 21, 9:16 PM CDTSevere Thunderstorm WarningTOPJackson, Nemaha, Pottawatomie44 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 0.0 hours before the alert went out and 88 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 2019-06-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3112 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 2019-06-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 424 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
3112 J/kg
Mixed-layer CIN
-255 J/kg
Mixed-layer LCL
832 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
424 m²/s²
0-3 km storm-relative helicity
623 m²/s²
Significant tornado parameter
0.0
Supercell composite
41.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 21, 7:47 PM CDTMesoscale DiscussionSPCBarton, Clay, Cloud, Dickinson, Ellis, Ellsworth and 12 more118 min
Jun 21, 9:40 PM CDTMesoscale DiscussionSPCGreeley, Logan, Sherman, Wallace, Wichita95 min
Jun 21, 11:05 PM CDTSevere Thunderstorm WatchSPCAnderson, Barton, Butler, Chase, Clay, Cloud and 48 more8 hr
Jun 21, 11:33 PM CDTMesoscale DiscussionSPCWyandotte87 min
Jun 22, 2:51 AM CDTMesoscale DiscussionSPCBarton, Butler, Chase, Clay, Cloud, Coffey and 34 more84 min
Jun 22, 4:32 AM CDTMesoscale DiscussionSPCAllen, Anderson, Barton, Bourbon, Butler, Chase and 40 more88 min
Jun 22, 1:58 PM CDTMesoscale DiscussionSPCAllen, Anderson, Atchison, Barber, Barton, Bourbon and 48 more2 hr
Jun 22, 2:42 PM CDTSevere Thunderstorm WatchSPCAnderson, Atchison, Barber, Barton, Brown, Butler and 46 more7 hr
Jun 22, 6:44 PM CDTSevere Thunderstorm WatchSPCGreeley, Hamilton, Kearny, Logan, Morton, Sherman and 4 more5 hr
Jun 22, 1:55 PM CDTMesoscale DiscussionSPCButler, Dunklin, Mississippi, New Madrid, Pemiscot, Stoddard95 min
Jun 21, 8:40 PM CDTMesoscale DiscussionSPCBoone, Colfax, Madison, Platte, Stanton2 hr
Jun 22, 5:18 AM CDTMesoscale DiscussionSPCAdams, Cass, Clay, Fillmore, Franklin, Gage and 15 more87 min
Jun 22, 5:38 PM CDTSevere Thunderstorm WatchSPCCass, Fillmore, Gage, Jefferson, Johnson, Lancaster and 6 more4 hr

Nearby

Severe Thunderstorm Watches in Missouri, 2019Severe Thunderstorm Watches in Kansas, 2019Severe Thunderstorm Watches in Nebraska, 2019Every severe thunderstorm watch in 2019

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.