Alert archive / Missouri / Tornado Watches in 2024

Tornado Watch 147

April 27, 202416 counties in Iowa; 4 counties in Kansas; 23 counties in Missouri

The Storm Prediction Center issued this tornado watch at Apr 27, 2024, 1:40 PM CDT for 16 counties in Iowa; 4 counties in Kansas; 23 counties in Missouri. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued: Apr 27, 2024, 1:40 PM CDT (18:40 UTC)
Expired: Apr 27, 2024, 9:00 PM CDT
In force: 7 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 65 kt

All 43 counties

Adams County, IA, Appanoose County, IA, Clarke County, IA, Davis County, IA, Decatur County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Monroe County, IA, Ringgold County, IA, Taylor County, IA, Union County, IA, Wapello County, IA, Warren County, IA, Wayne County, IA, Atchison County, KS, Doniphan County, KS, Leavenworth County, KS, Wyandotte County, KS, Adair County, MO, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Caldwell 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, Linn County, MO, Livingston County, MO, Mercer County, MO, Nodaway County, MO, Platte County, MO, Putnam County, MO, Ray County, MO, Schuyler County, MO, Sullivan County, MO, Worth County, MO

The radar

The Pleasant Hill radar (KEAX), 160 km from the middle of the area, began a volume at 18:42 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: 70%
One or more gusts of 65 knots or more: 30%
Ten or more severe hail reports: 70%
One or more hailstones of 2 inches or more: 60%
Six or more combined severe hail and wind reports: 95%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Apr 27, 2:06 PM CDT	Tornado Warning	EAX	Doniphan	39 min
Apr 27, 2:19 PM CDT	Severe Thunderstorm Warning	EAX	Atchison, Nodaway	41 min
Apr 27, 2:24 PM CDT	Severe Thunderstorm Warning	EAX	Atchison, Holt, Nodaway	23 min
Apr 27, 2:37 PM CDT	Tornado Warning	EAX	Andrew, Holt, Nodaway	38 min
Apr 27, 2:40 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Ringgold, Union	50 min
Apr 27, 2:45 PM CDT	Tornado Warning	EAX	Nodaway	30 min
Apr 27, 3:05 PM CDT	Severe Thunderstorm Warning	EAX	Atchison, Holt, Nodaway	25 min
Apr 27, 3:11 PM CDT	Tornado Warning	EAX	Gentry, Nodaway, Worth	49 min
Apr 27, 3:26 PM CDT	Severe Thunderstorm Warning	EAX	Andrew, Holt, Nodaway	20 min
Apr 27, 3:44 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Mahaska, Marion, Poweshiek	46 min
Apr 27, 3:57 PM CDT	Severe Thunderstorm Warning	EAX	Gentry, Nodaway, Worth	35 min
Apr 27, 4:00 PM CDT	Severe Thunderstorm Warning	EAX	Doniphan	25 min
Apr 27, 4:12 PM CDT	Tornado Warning	EAX	Gentry, Harrison	21 min
Apr 27, 4:13 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Lucas, Madison, Warren	20 min
Apr 27, 4:23 PM CDT	Severe Thunderstorm Warning	EAX	Daviess, DeKalb, Gentry, Harrison	37 min
Apr 27, 4:24 PM CDT	Severe Thunderstorm Warning	DMX	Mahaska, Poweshiek	51 min
Apr 27, 4:28 PM CDT	Tornado Warning Tornado observed	EAX	Gentry, Harrison, Mercer, Worth	47 min
Apr 27, 4:56 PM CDT	Severe Thunderstorm Warning	EAX	Daviess, Grundy, Harrison, Mercer, Putnam, Sullivan	49 min
Apr 27, 5:07 PM CDT	Tornado Warning	EAX	Grundy, Mercer, Putnam, Sullivan	23 min
Apr 27, 5:27 PM CDT	Tornado Warning	EAX	Mercer, Putnam, Sullivan	33 min
Apr 27, 5:36 PM CDT	Severe Thunderstorm Warning	EAX	Grundy, Linn, Mercer, Putnam, Sullivan	39 min
Apr 27, 5:36 PM CDT	Tornado Warning	EAX	Grundy, Mercer, Sullivan	24 min
Apr 27, 5:53 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Davis, Lucas, Mahaska, Marion, Monroe and 2 more	52 min
Apr 27, 5:55 PM CDT	Severe Thunderstorm Warning	EAX	Daviess, Grundy, Livingston	35 min
Apr 27, 6:03 PM CDT	Severe Thunderstorm Warning	EAX	Carroll, Chariton, Linn, Livingston	42 min
Apr 27, 6:09 PM CDT	Severe Thunderstorm Warning	EAX	Adair, Putnam, Sullivan	51 min
Apr 27, 6:20 PM CDT	Tornado Warning	EAX	Linn	25 min
Apr 27, 6:26 PM CDT	Severe Thunderstorm Warning	DMX	Davis, Mahaska, Poweshiek, Wapello	49 min
Apr 27, 6:27 PM CDT	Severe Thunderstorm Warning	EAX	Daviess, Grundy, Linn, Livingston, Mercer, Sullivan	48 min
Apr 27, 6:40 PM CDT	Flash Flood Warning	EAX	Adair, Grundy, Mercer, Putnam, Schuyler, Sullivan	6 hr
Apr 27, 6:41 PM CDT	Severe Thunderstorm Warning	EAX	Adair, Carroll, Chariton, Linn, Macon, Sullivan	49 min
Apr 27, 6:44 PM CDT	Severe Thunderstorm Warning	EAX	Johnson, Wyandotte	31 min
Apr 27, 7:16 PM CDT	Severe Thunderstorm Warning	DMX	Davis, Wapello	29 min
Apr 27, 7:30 PM CDT	Flash Flood Warning	EAX	Adair, Carroll, Chariton, Linn, Livingston, Macon and 1 more	6 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

Topeka, KS (KTOP), launched 12:00Z, 6.7 hours before the alert went out and 179 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1585 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 634 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 175 m²/s²
0-3 km storm-relative helicity: 179 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 6.9

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 26, 7:27 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Appanoose, Audubon, Boone, Calhoun and 16 more	93 min
Apr 27, 3:40 PM CDT	Mesoscale Discussion	SPC	Appanoose, Benton, Cedar, Clarke, Clinton, Davis and 28 more	95 min
Apr 27, 5:17 PM CDT	Mesoscale Discussion	SPC	Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 17 more	58 min
Apr 27, 5:58 PM CDT	Tornado Watch	SPC	Benton, Cedar, Clinton, Delaware, Des Moines, Dubuque and 14 more	6 hr
Apr 27, 10:57 AM CDT	Mesoscale Discussion	SPC	Chautauqua, Cowley, Elk, Montgomery, Sumner, Wilson	93 min
Apr 27, 11:33 AM CDT	Mesoscale Discussion	SPC	Atchison, Barton, Brown, Clay, Dickinson, Doniphan and 16 more	117 min
Apr 27, 11:51 AM CDT	Tornado Watch	SPC	Anderson, Barber, Barton, Brown, Butler, Chase and 43 more	8 hr
Apr 27, 1:15 PM CDT	Mesoscale Discussion	SPC	Ellis, Finney, Gove, Graham, Greeley, Hamilton and 13 more	3 hr
Apr 27, 1:54 PM CDT	Mesoscale Discussion	SPC	Allen, Bourbon, Chautauqua, Cherokee, Cowley, Crawford and 7 more	96 min
Apr 27, 2:54 PM CDT	Severe Thunderstorm Watch	SPC	Ellis, Finney, Gove, Graham, Greeley, Hamilton and 17 more	6 hr
Apr 27, 4:31 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Bourbon, Cherokee, Crawford, Johnson and 6 more	59 min
Apr 27, 4:57 PM CDT	Tornado Watch	SPC	Allen, Bourbon, Chautauqua, Cherokee, Crawford, Elk and 10 more	8 hr

Nearby

Tornado Watches in Missouri, 2024 Tornado Watches in Iowa, 2024 Tornado Watches in Kansas, 2024 Every tornado watch in 2024

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.