Alert archive / Missouri / Tornado Watches in 2013

Tornado Watch 114

April 17, 20137 counties in Illinois; 8 counties in Kansas; 74 counties in Missouri

The Storm Prediction Center issued this tornado watch at Apr 17, 2013, 11:11 AM CDT for 7 counties in Illinois; 8 counties in Kansas; 74 counties in Missouri. It was in force for 11 hr.

The area

The outline as issued.

The facts

Issued
Apr 17, 2013, 11:11 AM CDT (16:11 UTC)
Expired
Apr 17, 2013, 10:00 PM CDT
In force
11 hr
Issued by
the Storm Prediction Center
Largest hail expected
2.5 in
Strongest gust expected
60 kt
All 89 counties

Adams County, IL, Brown County, IL, Calhoun County, IL, Greene County, IL, Jersey County, IL, Macoupin County, IL, Pike County, IL, Bourbon County, KS, Cherokee County, KS, Crawford County, KS, Johnson County, KS, Leavenworth County, KS, Linn County, KS, Miami County, KS, Wyandotte County, KS, Audrain County, MO, Barry County, MO, Barton County, MO, Bates County, MO, Benton County, MO, Boone County, MO, Buchanan County, MO, Caldwell County, MO, Callaway County, MO, Camden County, MO, Carroll County, MO, Cass County, MO, Cedar County, MO, Chariton County, MO, Christian County, MO, City of Saint Louis, MO, Clay County, MO, Clinton County, MO, Cole County, MO, Cooper County, MO, Crawford County, MO, Dade County, MO, Dallas County, MO, Douglas County, MO, Franklin County, MO, Gasconade County, MO, Greene County, MO, Henry County, MO, Hickory County, MO, Howard County, MO, Jackson County, MO, Jasper County, MO, Jefferson County, MO, Johnson County, MO, Knox County, MO, Laclede County, MO, Lafayette County, MO, Lawrence County, MO, Lewis County, MO, Lincoln County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Maries County, MO, Marion County, MO, McDonald County, MO, Miller County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Morgan County, MO, Newton County, MO, Osage County, MO, Pettis County, MO, Phelps County, MO, Pike County, MO, Platte County, MO, Polk County, MO, Pulaski County, MO, Ralls County, MO, Randolph County, MO, Ray County, MO, Saint Charles County, MO, Saint Louis County, MO, Saline County, MO, Shelby County, MO, St. Clair County, MO, Stone County, MO, Taney County, MO, Vernon County, MO, Warren County, MO, Washington County, MO, Webster County, MO, Wright County, MO

The radar

The Pleasant Hill radar (KEAX), 116 km from the middle of the area, began a volume at 16:12 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
60%
One or more EF2 to EF5 tornadoes
40%
Ten or more severe wind reports
40%
One or more gusts of 65 knots or more
10%
Ten or more severe hail reports
30%
One or more hailstones of 2 inches or more
30%
Six or more combined severe hail and wind reports
80%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 17, 2:23 PM CDTSevere Thunderstorm WarningSGFCedar, St. Clair52 min
Apr 17, 2:32 PM CDTSevere Thunderstorm WarningEAXHenry, Johnson, Pettis28 min
Apr 17, 2:57 PM CDTSevere Thunderstorm WarningSGFBenton, Hickory63 min
Apr 17, 3:22 PM CDTSevere Thunderstorm WarningEAXCarroll, Chariton, Saline23 min
Apr 17, 3:23 PM CDTSevere Thunderstorm WarningLSXAdams22 min
Apr 17, 3:29 PM CDTSevere Thunderstorm WarningEAXPettis31 min
Apr 17, 3:56 PM CDTSevere Thunderstorm WarningEAXCooper, Pettis, Saline34 min
Apr 17, 4:15 PM CDTSevere Thunderstorm WarningSGFBenton, Morgan60 min
Apr 17, 4:47 PM CDTSevere Thunderstorm WarningLSXMoniteau43 min
Apr 17, 4:58 PM CDTSevere Thunderstorm WarningEAXHoward, Randolph32 min
Apr 17, 5:21 PM CDTTornado WarningLSXBoone, Moniteau24 min
Apr 17, 5:23 PM CDTSevere Thunderstorm WarningSGFBenton, Morgan52 min
Apr 17, 5:24 PM CDTTornado WarningLSXAudrain, Monroe36 min
Apr 17, 5:43 PM CDTSevere Thunderstorm WarningLSXBoone, Moniteau47 min
Apr 17, 5:55 PM CDTSevere Thunderstorm WarningEAXCooper, Pettis35 min
Apr 17, 5:55 PM CDTSevere Thunderstorm WarningLSXMarion, Monroe, Ralls, Shelby50 min
Apr 17, 5:55 PM CDTTornado WarningLSXAudrain, Monroe35 min
Apr 17, 5:58 PM CDTSevere Thunderstorm WarningEAXCooper32 min
Apr 17, 6:12 PM CDTSevere Thunderstorm WarningLSXAudrain, Boone, Callaway48 min
Apr 17, 6:15 PM CDTSevere Thunderstorm WarningLSXAudrain, Boone45 min
Apr 17, 6:24 PM CDTSevere Thunderstorm WarningLSXAdams66 min
Apr 17, 6:42 PM CDTTornado WarningLSXAdams48 min
Apr 17, 6:55 PM CDTSevere Thunderstorm WarningLSXAudrain, Boone, Monroe50 min
Apr 17, 7:01 PM CDTTornado WarningLSXAdams29 min
Apr 17, 7:11 PM CDTFlash Flood WarningEAXChariton, Cooper, Howard, Macon, Randolph, Saline8 hr
Apr 17, 7:17 PM CDTSevere Thunderstorm WarningEAXHoward, Randolph28 min
Apr 17, 7:27 PM CDTTornado WarningLSXAdams, Brown, Pike33 min
Apr 17, 7:39 PM CDTSevere Thunderstorm WarningLSXKnox, Lewis, Marion, Shelby51 min
Apr 17, 7:46 PM CDTFlash Flood WarningLSXAdams, Pike8 hr
Apr 17, 8:00 PM CDTTornado WarningLSXAdams, Brown30 min
Apr 17, 9:27 PM CDTSevere Thunderstorm WarningLSXMarion, Monroe, Ralls, Shelby48 min
Apr 17, 9:40 PM CDTFlash Flood WarningLSXKnox6 hr

Discussions around it

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

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 4.2 hours before the alert went out and 183 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, Springfield, MO at 12:00Z on 2013-04-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1448 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, Springfield, MO at 12:00Z on 2013-04-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 266 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
1448 J/kg
Mixed-layer CIN
-197 J/kg
Mixed-layer LCL
700 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
266 m²/s²
0-3 km storm-relative helicity
257 m²/s²
Significant tornado parameter
0.0
Supercell composite
7.2

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 16, 8:02 PM CDTMesoscale DiscussionSPCEdwards, Gallatin, Hamilton, Hardin, Saline, Wabash and 1 more88 min
Apr 16, 8:44 PM CDTMesoscale DiscussionSPCBond, Calhoun, Champaign, Christian, Clark, Clay and 35 more2 hr
Apr 17, 8:49 AM CDTMesoscale DiscussionSPCAdams, Brown, Bureau, Cass, DeWitt, Ford and 32 more56 min
Apr 17, 9:14 AM CDTSevere Thunderstorm WatchSPCBoone, Bureau, Carroll, Cook, DeKalb, DuPage and 30 more10 hr
Apr 17, 9:30 AM CDTMesoscale DiscussionSPCHardin2 hr
Apr 17, 12:39 PM CDTSevere Thunderstorm WatchSPCHardin, Pope5 hr
Apr 17, 1:33 PM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, Cook, DeKalb, DuPage and 30 more57 min
Apr 17, 3:04 PM CDTMesoscale DiscussionSPCCass, Champaign, Christian, Clark, Coles, Cumberland and 26 more56 min
Apr 17, 3:33 PM CDTTornado WatchSPCCass, Champaign, Christian, Coles, DeWitt, Douglas and 24 more8 hr
Apr 17, 3:38 PM CDTMesoscale DiscussionSPCAdams, Brown, Calhoun, Greene, Jersey, Macoupin and 1 more97 min
Apr 17, 3:53 PM CDTMesoscale DiscussionSPCHardin, Pope67 min
Apr 17, 6:02 PM CDTMesoscale DiscussionSPCCalhoun, Greene, Jersey, Pike88 min
Apr 17, 6:46 PM CDTMesoscale DiscussionSPCCass, Champaign, Christian, Coles, DeWitt, Douglas and 18 more89 min
Apr 17, 12:41 AM CDTMesoscale DiscussionSPCBarber, Butler, Chase, Clark, Comanche, Dickinson and 17 more94 min
Apr 17, 9:50 AM CDTMesoscale DiscussionSPCAllen, Anderson, Bourbon, Chautauqua, Cherokee, Coffey and 17 more55 min
Apr 17, 1:09 PM CDTMesoscale DiscussionSPCBarber, Butler, Chautauqua, Cowley, Elk, Greenwood and 8 more96 min
Apr 17, 1:50 PM CDTTornado WatchSPCAllen, Anderson, Chautauqua, Coffey, Cowley, Douglas and 12 more8 hr
Apr 17, 4:19 PM CDTMesoscale DiscussionSPCScotland26 min
Apr 17, 1:21 PM CDTTornado WatchSPCBlaine, Caddo, Canadian, Carter, Cherokee, Cleveland and 45 more10 hr
Apr 17, 5:23 PM CDTMesoscale DiscussionSPCCaddo, Canadian, Carter, Cherokee, Cleveland, Coal and 37 more97 min
Apr 17, 6:30 PM CDTMesoscale DiscussionSPCCleveland, Comanche, Grady, McClain90 min

Nearby

Tornado Watches in Missouri, 2013Tornado Watches in Kansas, 2013Tornado Watches in Illinois, 2013Every tornado watch in 2013

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.