Alert archive / Kansas / Tornado Watches in 2021

Tornado Watch 536

October 26, 202130 counties in Kansas; 12 counties in Oklahoma

The Storm Prediction Center issued this tornado watch at Oct 26, 2021, 6:17 PM CDT for 30 counties in Kansas; 12 counties in Oklahoma. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Oct 26, 2021, 6:17 PM CDT (23:17 UTC)
Expired
Oct 27, 2021, 1:00 AM CDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
2.5 in
Strongest gust expected
65 kt
All 42 counties

Barber County, KS, Barton County, KS, Clark County, KS, Comanche County, KS, Edwards County, KS, Ellis County, KS, Ellsworth County, KS, Ford County, KS, Graham County, KS, Harper County, KS, Hodgeman County, KS, Jewell County, KS, Kingman County, KS, Kiowa County, KS, Lincoln County, KS, Mitchell County, KS, Ness County, KS, Norton County, KS, Osborne County, KS, Pawnee County, KS, Phillips County, KS, Pratt County, KS, Reno County, KS, Rice County, KS, Rooks County, KS, Rush County, KS, Russell County, KS, Smith County, KS, Stafford County, KS, Trego County, KS, Alfalfa County, OK, Beckham County, OK, Blaine County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Harper County, OK, Major County, OK, Roger Mills County, OK, Washita County, OK, Woods County, OK, Woodward County, OK

The radar

The Dodge City radar (KDDC), 107 km from the middle of the area, began a volume at 23:17 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 SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
40%
One or more EF2 to EF5 tornadoes
20%
Ten or more severe wind reports
70%
One or more gusts of 65 knots or more
30%
Ten or more severe hail reports
70%
One or more hailstones of 2 inches or more
60%
Six or more combined severe hail and wind reports
95%

Warnings issued inside it

28 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Oct 26, 6:21 PM CDTSevere Thunderstorm WarningOUNBeckham, Roger Mills24 min
Oct 26, 6:43 PM CDTSevere Thunderstorm WarningOUNEllis, Roger Mills, Woodward27 min
Oct 26, 6:59 PM CDTSevere Thunderstorm WarningOUNBeckham, Greer13 min
Oct 26, 7:01 PM CDTSevere Thunderstorm WarningOUNEllis, Harper, Woods, Woodward18 min
Oct 26, 7:06 PM CDTSevere Thunderstorm WarningOUNBeckham, Roger Mills39 min
Oct 26, 7:26 PM CDTSevere Thunderstorm WarningDDCFinney, Gray, Hodgeman, Lane, Ness35 min
Oct 26, 7:37 PM CDTSevere Thunderstorm WarningDDCLane, Ness, Trego53 min
Oct 26, 7:42 PM CDTSevere Thunderstorm WarningOUNBeckham, Roger Mills48 min
Oct 26, 7:55 PM CDTSevere Thunderstorm WarningGLDGove, Graham, Sheridan35 min
Oct 26, 7:55 PM CDTTornado WarningOUNBeckham, Roger Mills35 min
Oct 26, 7:57 PM CDTSevere Thunderstorm WarningDDCFord, Hodgeman48 min
Oct 26, 7:59 PM CDTSevere Thunderstorm WarningDDCHodgeman, Ness22 min
Oct 26, 8:05 PM CDTSevere Thunderstorm WarningOUNDewey, Ellis, Roger Mills, Woodward40 min
Oct 26, 8:07 PM CDTSevere Thunderstorm WarningOUNHarper, Woods, Woodward38 min
Oct 26, 8:10 PM CDTSevere Thunderstorm WarningOUNHarper, Woods16 min
Oct 26, 8:41 PM CDTSevere Thunderstorm Warning Considerable damage threatOUNCuster, Dewey, Ellis, Harper, Major, Roger Mills and 2 more49 min
Oct 26, 8:46 PM CDTSevere Thunderstorm Warning Considerable damage threatGLDGraham, Norton59 min
Oct 26, 8:48 PM CDTSevere Thunderstorm WarningDDCTrego36 min
Oct 26, 8:53 PM CDTSevere Thunderstorm Warning Considerable damage threatGIDPhillips, Rooks52 min
Oct 26, 9:09 PM CDTSevere Thunderstorm WarningDDCEdwards, Ford, Hodgeman, Pawnee36 min
Oct 26, 9:30 PM CDTSevere Thunderstorm WarningGIDPhillips, Smith45 min
Oct 26, 9:31 PM CDTSevere Thunderstorm Warning Considerable damage threatOUNAlfalfa, Dewey, Major, Woods, Woodward44 min
Oct 26, 10:11 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Major, Woods22 min
Oct 26, 10:14 PM CDTSevere Thunderstorm WarningICTKingman, Reno46 min
Oct 26, 10:42 PM CDTSevere Thunderstorm WarningOUNCaddo, Comanche, Cotton, Kiowa, Tillman, Washita63 min
Oct 26, 10:43 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Woods35 min
Oct 26, 11:52 PM CDTSevere Thunderstorm Warning Considerable damage threatOUNBlaine, Canadian, Cleveland, Garvin, Grady, Kingfisher and 3 more53 min
Oct 26, 11:53 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Garfield, Grant, Major52 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Dodge City, (KDDC), launched 12:00Z, 11.3 hours before the alert went out and 101 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-pSkew-T log-p diagram, Dodge City, at 12:00Z on 2021-10-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Dodge City, at 12:00Z on 2021-10-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 499 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1730 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
499 m²/s²
0-3 km storm-relative helicity
484 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

617 
WWUS20 KWNS 262314
SEL6  
SPC WW 262314
KSZ000-OKZ000-270600-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 536
NWS Storm Prediction Center Norman OK
615 PM CDT Tue Oct 26 2021

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Central Kansas
  Northwest Oklahoma

* Effective this Tuesday night and Wednesday morning from 615 PM
  until 100 AM CDT.

* Primary threats include...
  A couple tornadoes possible
  Scattered large hail and isolated very large hail events to 2.5
    inches in diameter likely
  Scattered damaging winds likely with isolated significant gusts
    to 75 mph possible

SUMMARY...Thunderstorms will slowly intensify this evening along a
dryline over west-central Kansas and western Oklahoma.  The
strongest cells will pose a risk of damaging wind gusts, large hail,
and a few tornadoes.

The tornado watch area is approximately along and 60 statute miles
east and west of a line from 55 miles northeast of Hill City KS to
15 miles east southeast of Clinton OK. For a complete depiction of
the watch see the associated watch outline update (WOUS64 KWNS
WOU6).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and severe thunderstorms in and close to the watch
area. Persons in these areas should be on the lookout for
threatening weather conditions and listen for later statements
and possible warnings.

&&

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 2.5 inches. Extreme turbulence and surface wind
gusts to 65 knots. A few cumulonimbi with maximum tops to 500. Mean
storm motion vector 23035.

...Hart

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 26, 4:51 PM CDTMesoscale DiscussionSPCBarber, Barton, Clark, Comanche, Decatur, Edwards and 24 more84 min
Oct 26, 5:40 PM CDTMesoscale DiscussionSPCGreer, Harmon, Jackson, Kiowa, Tillman65 min

Nearby

Tornado Watches in Kansas, 2021Tornado Watches in Oklahoma, 2021Every tornado watch 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.