Alert archive / Missouri / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 138, NWS Kansas City, MO

June 28, 20204 counties in Missouri; Atchison County, Doniphan County, Kansas

NWS Kansas City, MO issued this severe thunderstorm warning at Jun 28, 2020, 4:57 AM CDT for 4 counties in Missouri; Atchison County, Doniphan County, Kansas. It was in force for 48 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: Jun 28, 2020, 4:57 AM CDT (09:57 UTC)
Expired: Jun 28, 2020, 5:45 AM CDT
In force: 48 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Atchison County, KS, Doniphan County, KS, Andrew County, MO, Buchanan County, MO, Holt County, MO, Platte County, MO

The radar

The Pleasant Hill radar (KEAX), 122 km from the middle of the area, began a volume at 10:00 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 nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 10.0 hours before the alert went out and 99 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: 1397 J/kg
Mixed-layer CIN: -122 J/kg
Mixed-layer LCL: 1030 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 107 m²/s²
0-3 km storm-relative helicity: 206 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 5.0

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 Jun 27, 6:05 PM CDT, 10 hours 52 minutes earlier.

Area forecast discussion, Jun 27, 6:05 PM CDT, 10 hours 52 minutes before

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Hazardous weather outlook, Jun 27, 5:08 AM CDT, 23 hours 49 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
Jun 28, 3:46 AM CDT	Special Weather Statement	EAX	Atchison	44 min
Jun 28, 3:57 AM CDT	Severe Thunderstorm Warning	EAX	Atchison	33 min
Jun 28, 4:23 AM CDT	Special Weather Statement	EAX	Atchison, Holt, Nodaway	52 min
Jun 28, 5:12 AM CDT	Special Weather Statement	EAX	Gentry, Nodaway, Worth	48 min
Jun 28, 5:43 AM CDT	Special Weather Statement	EAX	Andrew, Buchanan, Caldwell, Clinton, Daviess, DeKalb	47 min
Jun 28, 5:45 AM CDT	Special Weather Statement	EAX	Gentry, Harrison, Mercer, Worth	45 min
Jun 28, 6:22 AM CDT	Special Weather Statement	EAX	Caldwell, Clinton, Daviess, Grundy, Livingston, Mercer and 2 more	38 min
Jun 28, 7:03 AM CDT	Special Weather Statement	EAX	Sullivan	27 min
Jun 28, 7:29 AM CDT	Special Weather Statement	EAX	Macon	31 min
Jun 28, 7:39 AM CDT	Special Weather Statement	EAX	Schuyler	21 min
Jun 28, 4:40 AM CDT	Special Weather Statement	EAX	Doniphan	50 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2020 Severe Thunderstorm Warnings in Kansas, 2020 Every severe thunderstorm warning in 2020

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.