Alert archive / Kansas / Tornado Warnings in 2021

Tornado Warning 12, NWS Topeka, KS

December 15, 2021Nemaha County, Pottawatomie County, Kansas

NWS Topeka, KS issued this tornado warning at Dec 15, 2021, 4:10 PM CST for Nemaha County, Pottawatomie County, Kansas. It was in force for 20 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Dec 15, 2021, 4:10 PM CST (22:10 UTC)
Expired: Dec 15, 2021, 4:30 PM CST
In force: 20 min
Issued by: NWS Topeka, KS
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Nemaha County, KS, Pottawatomie County, KS

The radar

The Topeka radar (KTWX), 67 km from the middle of the area, began a volume at 22:11 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.

What was reported inside it

Time	Report	Where	Remark
Dec 15, 4:20 PM CST	TSTM WND GST 70	4 S Corning, KS

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

Issued	Product	Office	Lasted
Dec 15, 1:23 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Topeka, KS (KTOP), launched 12:00Z, 10.2 hours before the alert went out and 73 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1036 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 466 m²/s²
0-3 km storm-relative helicity: 477 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

663 
WFUS53 KTOP 152210
TORTOP
KSC131-149-152230-
/O.NEW.KTOP.TO.W.0012.211215T2210Z-211215T2230Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Topeka KS
410 PM CST Wed Dec 15 2021

The National Weather Service in Topeka has issued a

* Tornado Warning for...
  Northeastern Pottawatomie County in northeastern Kansas...
  South central Nemaha County in northeastern Kansas...

* Until 430 PM CST.
    
* At 410 PM CST, a severe thunderstorm capable of producing a tornado
  was located near Onaga, moving northeast at 65 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This dangerous storm will be near...
  Corning and Goff around 425 PM CST.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3962 9589 3957 9601 3957 9603 3955 9604
      3946 9624 3951 9630 3973 9600
TIME...MOT...LOC 2210Z 233DEG 61KT 3951 9623 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN

$$

Gargan

2 follow-up statements

512 
WWUS53 KTOP 152217
SVSTOP

Severe Weather Statement
National Weather Service Topeka KS
417 PM CST Wed Dec 15 2021

KSC149-152226-
/O.CAN.KTOP.TO.W.0012.000000T0000Z-211215T2230Z/
Pottawatomie-
417 PM CST Wed Dec 15 2021

...THE TORNADO WARNING FOR NORTHEASTERN POTTAWATOMIE COUNTY IS
CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled. A 
severe thunderstorm warning continues for northeast Pottawatomie 
county.

A Tornado Watch remains in effect until 800 PM CST for northeastern
Kansas.

LAT...LON 3962 9589 3957 9601 3957 9609 3960 9618
      3973 9600
TIME...MOT...LOC 2216Z 231DEG 64KT 3961 9609 

$$

KSC131-152230-
/O.CON.KTOP.TO.W.0012.000000T0000Z-211215T2230Z/
Nemaha-
417 PM CST Wed Dec 15 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 430 PM CST FOR SOUTH
CENTRAL NEMAHA COUNTY...
    
At 416 PM CST, a severe thunderstorm capable of producing a tornado
was located 4 miles southwest of Corning, moving northeast at 75 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This dangerous storm will be near...
  Corning around 420 PM CST.
  Goff around 425 PM CST.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3962 9589 3957 9601 3957 9609 3960 9618
      3973 9600
TIME...MOT...LOC 2216Z 231DEG 64KT 3961 9609 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN

$$

Gargan

553 
WWUS53 KTOP 152224
SVSTOP

Severe Weather Statement
National Weather Service Topeka KS
424 PM CST Wed Dec 15 2021

KSC131-152233-
/O.EXP.KTOP.TO.W.0012.000000T0000Z-211215T2230Z/
Nemaha-
424 PM CST Wed Dec 15 2021

...THE TORNADO WARNING FOR SOUTH CENTRAL NEMAHA COUNTY WILL EXPIRE AT
430 PM CST...
    
The tornado threat has diminished and the Tornado Warning has been 
cancelled. However, damaging winds remain likely and a Severe 
Thunderstorm Warning remains in effect for the area.

A Tornado Watch remains in effect until 800 PM CST for northeastern
Kansas.

Remember, a Severe Thunderstorm Warning still remains in effect for
portions of Nemaha county.

LAT...LON 3962 9589 3957 9601 3957 9609 3960 9618
      3973 9600
TIME...MOT...LOC 2223Z 233DEG 61KT 3967 9599 

$$

Gargan

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 15, 1:57 PM CST	Severe Thunderstorm Warning Destructive damage threat	TOP	Cloud, Ottawa, Republic	48 min
Dec 15, 2:42 PM CST	Severe Thunderstorm Warning Destructive damage threat	TOP	Clay, Cloud, Dickinson, Marshall, Ottawa, Republic and 2 more	48 min
Dec 15, 3:00 PM CST	Severe Thunderstorm Warning Destructive damage threat	TOP	Dickinson, Geary, Morris	45 min
Dec 15, 3:01 PM CST	Blowing Dust Advisory	TOP	Clay, Cloud, Dickinson, Ottawa, Republic, Washington	3 hr
Dec 15, 3:19 PM CST	Severe Thunderstorm Warning Destructive damage threat	TOP	Clay, Dickinson, Geary, Jackson, Marshall, Nemaha and 4 more	41 min
Dec 15, 3:29 PM CST	Tornado Warning	TOP	Dickinson, Geary, Riley	13 min
Dec 15, 3:33 PM CST	Tornado Warning	TOP	Pottawatomie, Riley	15 min
Dec 15, 3:39 PM CST	Severe Thunderstorm Warning Destructive damage threat	TOP	Geary, Morris, Wabaunsee	51 min
Dec 15, 3:54 PM CST	Severe Thunderstorm Warning Destructive damage threat	TOP	Brown, Geary, Jackson, Marshall, Nemaha, Pottawatomie and 3 more	51 min
Dec 15, 3:57 PM CST	Tornado Warning	TOP	Jackson, Pottawatomie	10 min
Dec 15, 4:20 PM CST	Severe Thunderstorm Warning Destructive damage threat	TOP	Lyon, Morris, Osage, Shawnee, Wabaunsee	40 min
Dec 15, 4:33 PM CST	Severe Thunderstorm Warning Destructive damage threat	TOP	Brown, Jackson, Jefferson, Shawnee	27 min
Dec 15, 4:35 PM CST	Severe Thunderstorm Warning Destructive damage threat	TOP	Coffey, Lyon, Osage	40 min
Dec 15, 4:53 PM CST	Severe Thunderstorm Warning Destructive damage threat	TOP	Douglas, Franklin, Jefferson, Lyon, Osage, Shawnee and 1 more	37 min
Dec 15, 4:54 PM CST	Severe Thunderstorm Warning Destructive damage threat	TOP	Brown, Douglas, Jackson, Jefferson, Shawnee	51 min
Dec 15, 5:09 PM CST	Severe Thunderstorm Warning Considerable damage threat	TOP	Franklin, Osage	36 min
Dec 15, 5:15 PM CST	Severe Thunderstorm Warning Destructive damage threat	TOP	Anderson, Coffey, Franklin, Lyon, Osage	45 min
Dec 15, 5:24 PM CST	Severe Thunderstorm Warning Destructive damage threat	TOP	Douglas, Franklin, Jefferson, Osage, Shawnee	36 min
Dec 15, 5:42 PM CST	Severe Thunderstorm Warning Considerable damage threat	TOP	Franklin, Osage	33 min
Dec 15, 5:54 PM CST	Severe Thunderstorm Warning Considerable damage threat	TOP	Anderson, Coffey, Franklin, Osage	36 min
Dec 15, 5:57 PM CST	Severe Thunderstorm Warning	TOP	Douglas, Franklin	18 min

Nearby

Tornado Warnings in Kansas, 2021 Every tornado warning in 2021 Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.