Alert archive / Kansas / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 69, 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, 5:11 AM CDT for Platte County, Missouri; Leavenworth County, Wyandotte County, Kansas. It was in force for 25 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, 5:11 AM CDT (10:11 UTC)
Expired: Apr 20, 2023, 5:36 AM CDT
In force: 25 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Hail: 0.75 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 10:13 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, 10.2 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, 3:55 AM CDT, 1 hour 16 minutes earlier.

Area forecast discussion, Apr 20, 3:55 AM CDT, 1 hour 16 minutes before

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Hazardous weather outlook, Apr 20, 5:00 AM CDT, 11 minutes before

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In the hours before

Local storm report, Apr 20, 3:40 AM CDT, 1 hour 31 minutes before

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Local storm report, Apr 20, 3:43 AM CDT, 1 hour 28 minutes before

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Special weather statement, Apr 20, 4:07 AM CDT, 1 hour 4 minutes before

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Special weather statement, Apr 20, 4:12 AM CDT, 59 minutes before

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Special weather statement, Apr 20, 4:18 AM CDT, 53 minutes before

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Local storm report, Apr 20, 4:23 AM CDT, 48 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, 3:43 AM CDT	Severe Thunderstorm Warning	EAX	Platte	32 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, 5:43 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.