Alert archive / Kansas / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 64, NWS Kansas City, MO

April 20, 2023Platte County, Missouri; Leavenworth County, Wyandotte County, Kansas

NWS Kansas City, MO issued this severe thunderstorm warning at Apr 20, 2023, 3:43 AM CDT for Platte County, Missouri; Leavenworth County, Wyandotte County, Kansas. It was in force for 32 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 20, 2023, 3:43 AM CDT (08:43 UTC)
Expired: Apr 20, 2023, 4:15 AM CDT
In force: 32 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Leavenworth County, KS, Wyandotte County, KS, Platte County, MO

The radar

The Pleasant Hill radar (KEAX), 70 km from the middle of the area, began a volume at 08:42 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 19, 10:58 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 8.7 hours before the alert went out and 72 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: 1951 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 1353 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 132 m²/s²
0-3 km storm-relative helicity: 309 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 10.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Kansas City, MO wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 20, 12:57 AM CDT, 2 hours 46 minutes earlier.

Area forecast discussion, Apr 20, 12:57 AM CDT, 2 hours 46 minutes before

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Hazardous weather outlook, Apr 19, 12:45 PM CDT, 14 hours 58 minutes before

Hazardous Weather Outlook
National Weather Service Kansas City/Pleasant Hill MO
1245 PM CDT Wed Apr 19 2023

KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040-
043>046-053-054-201745-
Atchison KS-Miami-Linn KS-Doniphan-Leavenworth-Wyandotte-Johnson KS-
Atchison MO-Nodaway-Worth-Gentry-Harrison-Mercer-Putnam-Schuyler-
Holt-Andrew-De Kalb-Daviess-Grundy-Sullivan-Adair-Buchanan-Clinton-
Caldwell-Livingston-Linn MO-Macon-Platte-Clay-Ray-Carroll-Chariton-
Randolph-Jackson-Lafayette-Saline-Howard-Cass-Johnson MO-Pettis-
Cooper-Bates-Henry-
1245 PM CDT Wed Apr 19 2023

This hazardous weather outlook is for northwest...north central and
west central Missouri...as well as extreme eastern Kansas.

.DAY ONE...This Afternoon and Tonight

 Strong to severe storms are possible this evening and overnight
 across northeastern KS and northwestern MO. Large hail, damaging
 winds, and a few tornadoes are possible. Locally heavy rainfall is
 also possible.

 Strong non-thunderstorm wind gusts are expected this evening and
 overnight. Wind gusts to 45 mph are expected.

 More detailed information can be accessed at...
 https://www.weather.gov/eax/hwo

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

 Widespread subfreezing temperatures are expected Sunday morning.

 More detailed information can be accessed at...
 https://www.weather.gov/eax/hwo

In the hours before

Special weather statement, Apr 19, 10:46 PM CDT, 4 hours 57 minutes before

Special Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
1046 PM CDT Wed Apr 19 2023

MOZ014-022-023-200415-
Daviess MO-Livingston MO-Caldwell MO-
1046 PM CDT Wed Apr 19 2023

...A strong thunderstorm will impact portions of southeastern
Daviess, northeastern Caldwell and Livingston Counties through 1115
PM CDT...

At 1045 PM CDT, Doppler radar was tracking a strong thunderstorm near
Breckenridge, or 9 miles east of Hamilton, moving northeast at 45
mph.

HAZARD...Wind gusts up to 50 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Chillicothe, Braymer, Breckenridge, Utica, Chula, Ludlow,
Mooresville, Lock Springs, Dawn, Spring Hill and Avalon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3968 9336 3961 9363 3961 9375 3957 9376
      3956 9381 3979 9396 3996 9359 3997 9350
      3996 9349
TIME...MOT...LOC 0345Z 244DEG 39KT 3969 9383

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

CDB

Special weather statement, Apr 19, 11:52 PM CDT, 3 hours 51 minutes before

Special Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
1152 PM CDT Wed Apr 19 2023

MOZ007-008-016-017-024-025-200530-
Schuyler MO-Putnam MO-Adair MO-Macon MO-Linn MO-Sullivan MO-
1152 PM CDT Wed Apr 19 2023

...Strong thunderstorms will impact portions of Adair, northeastern
Linn, Sullivan, Putnam, western Schuyler and northwestern Macon
Counties through 1230 AM CDT...

At 1151 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 11 miles southwest of Unionville to 10 miles
northwest of Bucklin. Movement was northeast at 55 mph.

HAZARD...Wind gusts up to 50 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Kirksville, Milan, Unionville, La Plata, Green City, Queen City,
Novinger, Greentop, Greencastle, Gibbs, Millard, Pollock,
Worthington, Elmer, Livonia, South Gifford, Kirksville Regional, New
Boston, Winigan and Lemons.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4010 9236 3979 9299 4038 9325 4058 9309
      4059 9263
TIME...MOT...LOC 0451Z 217DEG 46KT 4037 9317 3992 9297

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

CDB

Local storm report, Apr 20, 12:02 AM CDT, 3 hours 41 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1202 AM CDT THU APR 20 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1038 PM     HAIL             TONGANOXIE              39.11N 95.09W
04/19/2023  E1.00 INCH       LEAVENWORTH        KS   PUBLIC

&&

SM

Special weather statement, Apr 20, 12:19 AM CDT, 3 hours 24 minutes before

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Local storm report, Apr 20, 3:40 AM CDT, 3 minutes before

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Local storm report, Apr 20, 3:43 AM CDT, 0 minutes before

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The office that day

Everything else NWS Kansas City, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 19, 7:48 PM CDT	Severe Thunderstorm Warning	EAX	Atchison, Holt	42 min
Apr 19, 8:25 PM CDT	Severe Thunderstorm Warning	EAX	Atchison, Holt, Nodaway	35 min
Apr 19, 8:53 PM CDT	Severe Thunderstorm Warning	EAX	Andrew, Atchison, Holt, Nodaway	24 min
Apr 19, 8:55 PM CDT	Special Weather Statement	EAX	Andrew	35 min
Apr 19, 9:33 PM CDT	Special Weather Statement	EAX	Clay, Platte	27 min
Apr 19, 10:02 PM CDT	Special Weather Statement	EAX	Clay, Clinton, Platte	43 min
Apr 19, 10:15 PM CDT	Special Weather Statement	EAX	Caldwell	30 min
Apr 19, 10:46 PM CDT	Special Weather Statement	EAX	Livingston	29 min
Apr 19, 10:56 PM CDT	Severe Thunderstorm Warning	EAX	Platte	20 min
Apr 19, 11:52 PM CDT	Special Weather Statement	EAX	Adair, Putnam, Sullivan	38 min
Apr 20, 12:07 AM CDT	Severe Thunderstorm Warning	EAX	Andrew, Holt	23 min
Apr 20, 12:19 AM CDT	Special Weather Statement	EAX	Schuyler	26 min
Apr 20, 4:07 AM CDT	Special Weather Statement	EAX	Clinton, Platte	38 min
Apr 20, 4:12 AM CDT	Special Weather Statement	EAX	Holt	33 min
Apr 20, 4:18 AM CDT	Special Weather Statement	EAX	Holt	27 min
Apr 20, 4:19 AM CDT	Severe Thunderstorm Warning	EAX	Cass, Jackson	29 min
Apr 20, 4:25 AM CDT	Severe Thunderstorm Warning	EAX	Andrew, Buchanan, Holt	35 min
Apr 20, 4:57 AM CDT	Severe Thunderstorm Warning	EAX	Andrew, Buchanan, Clinton, DeKalb, Gentry, Nodaway and 1 more	48 min
Apr 20, 5:11 AM CDT	Severe Thunderstorm Warning	EAX	Platte	25 min
Apr 20, 5:43 AM CDT	Special Weather Statement	EAX	Caldwell, Clay, Clinton	47 min
Apr 20, 6:23 AM CDT	Special Weather Statement	EAX	Carroll, Cass, Jackson, Lafayette, Ray	37 min
Apr 20, 6:37 AM CDT	Special Weather Statement	EAX	Randolph	23 min
Apr 20, 7:01 AM CDT	Areal Flood Advisory	EAX	Cass, Clay, Jackson, Platte	64 min
Apr 19, 8:16 PM CDT	Special Weather Statement	EAX	Atchison	29 min
Apr 19, 8:49 PM CDT	Special Weather Statement	EAX	Leavenworth, Wyandotte	41 min
Apr 19, 10:24 PM CDT	Severe Thunderstorm Warning	EAX	Leavenworth, Wyandotte	36 min
Apr 20, 3:04 AM CDT	Severe Thunderstorm Warning	EAX	Johnson, Miami	26 min
Apr 20, 3:19 AM CDT	Severe Thunderstorm Warning	EAX	Johnson, Leavenworth, Wyandotte	26 min
Apr 20, 3:48 AM CDT	Severe Thunderstorm Warning	EAX	Johnson, Miami	42 min

Nearby

Severe Thunderstorm Warnings in Kansas, 2023 Severe Thunderstorm Warnings in Missouri, 2023 Every severe thunderstorm warning in 2023

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.