Alert archive / Kansas / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 283, NWS Topeka, KS

August 21, 2019Anderson County, Kansas

NWS Topeka, KS issued this severe thunderstorm warning at Aug 21, 2019, 7:43 PM CDT for Anderson County, Kansas. It was in force for 47 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: Aug 21, 2019, 7:43 PM CDT (00:43 UTC)
Expired: Aug 21, 2019, 8:30 PM CDT
In force: 47 min
Issued by: NWS Topeka, KS
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Anderson County, KS

The radar

The Pleasant Hill radar (KEAX), 111 km from the middle of the area, began a volume at 00:42 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 nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 0.7 hours before the alert went out and 92 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: 551 J/kg
Mixed-layer CIN: -75 J/kg
Mixed-layer LCL: 990 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 160 m²/s²
0-3 km storm-relative helicity: 258 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 5.3

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 Topeka, KS wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 21, 2:45 PM CDT, 4 hours 58 minutes earlier.

Area forecast discussion, Aug 21, 2:45 PM CDT, 4 hours 58 minutes before

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Hazardous weather outlook, Aug 21, 2:55 PM CDT, 4 hours 48 minutes before

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The office that day

Everything else NWS Topeka, KS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 21, 7:20 PM CDT	Special Weather Statement	TOP	Franklin	25 min
Aug 21, 8:15 PM CDT	Special Weather Statement	TOP	Coffey	30 min
Aug 21, 11:38 PM CDT	Special Weather Statement	TOP	Franklin	52 min
Aug 22, 12:03 AM CDT	Special Weather Statement	TOP	Anderson	42 min
Aug 22, 12:45 AM CDT	Special Weather Statement	TOP	Anderson	45 min
Aug 22, 1:01 AM CDT	Areal Flood Advisory	TOP	Anderson, Franklin	3 hr
Aug 22, 4:00 AM CDT	River Flood Warning	TOP	Anderson	53 hr

Nearby

Severe Thunderstorm Warnings in Kansas, 2019 Every severe thunderstorm warning in 2019

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.