Alert archive / Kansas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 69, NWS Topeka, KS

June 24, 2021Brown County, Nemaha County, Kansas

NWS Topeka, KS issued this severe thunderstorm warning at Jun 24, 2021, 6:36 PM CDT for Brown County, Nemaha County, Kansas. It was in force for 24 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 24, 2021, 6:36 PM CDT (23:36 UTC)
Expired: Jun 24, 2021, 7:00 PM CDT
In force: 24 min
Issued by: NWS Topeka, KS
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Brown County, KS, Nemaha County, KS

The radar

The Topeka radar (KTWX), 112 km from the middle of the area, began a volume at 23:37 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
Jun 24, 3:44 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Topeka, KS (KTOP), launched 12:00Z, 11.6 hours before the alert went out and 108 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: 2072 J/kg
Mixed-layer CIN: -283 J/kg
Mixed-layer LCL: 688 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 342 m²/s²
0-3 km storm-relative helicity: 386 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

671 
WUUS53 KTOP 242336
SVRTOP
KSC013-131-250000-
/O.NEW.KTOP.SV.W.0069.210624T2336Z-210625T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Topeka KS
636 PM CDT Thu Jun 24 2021

The National Weather Service in Topeka has issued a

* Severe Thunderstorm Warning for...
  Northeastern Nemaha County in northeastern Kansas...
  Northwestern Brown County in northeastern Kansas...

* Until 700 PM CDT.

* At 635 PM CDT, a severe thunderstorm was located over Bern, moving
  east at 25 mph.

  HAZARD...Ping pong ball size hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees.

* Locations impacted include...
  Sabetha and Bern. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1000 PM CDT for northeastern
Kansas.

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3994 9564 3990 9609 4000 9615 4000 9562
TIME...MOT...LOC 2335Z 264DEG 23KT 3998 9595 

HAIL...1.50IN
WIND...60MPH
 
$$

Reese

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 24, 4:43 AM CDT	Special Weather Statement	TOP	Brown	32 min
Jun 24, 5:48 AM CDT	Severe Thunderstorm Warning	TOP	Jackson, Jefferson, Shawnee	27 min
Jun 24, 6:42 AM CDT	Severe Thunderstorm Warning	TOP	Douglas, Franklin	18 min
Jun 24, 1:46 PM CDT	Flash Flood Watch	TOP	Anderson, Brown, Coffey, Douglas, Franklin, Jackson and 9 more	58 hr
Jun 24, 5:34 PM CDT	Severe Thunderstorm Warning	TOP	Marshall	26 min
Jun 24, 5:45 PM CDT	Tornado Warning	TOP	Marshall	30 min
Jun 24, 6:01 PM CDT	Severe Thunderstorm Warning	TOP	Marshall, Nemaha	44 min
Jun 24, 6:07 PM CDT	Tornado Warning	TOP	Marshall	23 min
Jun 24, 6:16 PM CDT	Tornado Warning	TOP	Marshall, Nemaha	29 min
Jun 24, 6:26 PM CDT	Tornado Warning	TOP	Marshall, Nemaha	34 min
Jun 24, 6:46 PM CDT	Severe Thunderstorm Warning	TOP	Pottawatomie, Riley	29 min
Jun 24, 6:58 PM CDT	Areal Flood Advisory	TOP	Brown, Nemaha	61 min

Nearby

Severe Thunderstorm Warnings in Kansas, 2021 Every severe thunderstorm warning in 2021

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.