Alert archive / Oklahoma / Tornado Warnings in 2021

Tornado Warning 46, NWS Norman, OK

October 27, 20214 counties in Oklahoma

NWS Norman, OK issued this tornado warning at Oct 27, 2021, 12:36 AM CDT for 4 counties in Oklahoma. It was in force for 24 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: Oct 27, 2021, 12:36 AM CDT (05:36 UTC)
Expired: Oct 27, 2021, 1:00 AM CDT
In force: 24 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Cleveland County, OK, Lincoln County, OK, Oklahoma County, OK, Pottawatomie County, OK

The radar

The Norman radar (KTLX), 4 km from the middle of the area, began a volume at 05:37 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.

What was reported inside it

Time	Report	Where	Remark
Oct 27, 12:38 AM CDT	TSTM WND DMG	5 Ne Norman, OK	POSSIBLE TORNADO. TREE BRANCHES SNAPPED, SOFFIT DAMAGED, TRAILER BLOWN 20 YARDS. NEAR NE 36TH AVENUE AND FRANKLIN ROAD IN NORMAN.

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
Oct 26, 10:26 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 5.6 hours before the alert went out and 14 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: 791 J/kg
Mixed-layer CIN: -225 J/kg
Mixed-layer LCL: 916 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 277 m²/s²
0-3 km storm-relative helicity: 380 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.5

Open this sounding in Storm Lab

The text

As transmitted.

925 
WFUS54 KOUN 270536
TOROUN
OKC027-081-109-125-270600-
/O.NEW.KOUN.TO.W.0046.211027T0536Z-211027T0600Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Norman OK
1236 AM CDT Wed Oct 27 2021

The National Weather Service in Norman has issued a

* Tornado Warning for...
  Southwestern Lincoln County in central Oklahoma...
  Southeastern Oklahoma County in central Oklahoma...
  Northeastern Cleveland County in central Oklahoma...
  Northwestern Pottawatomie County in central Oklahoma...

* Until 100 AM CDT.
    
* At 1236 AM CDT, a severe thunderstorm capable of producing a
  tornado was located over western Norman, or 6 miles southwest of
  Stanley Draper Lake, moving northeast at 45 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.

* Locations impacted include...
  Southeastern Oklahoma City, Norman, Moore, Choctaw, Harrah, McLoud,
  Stanley Draper Lake, Stella, Newalla and northern Lake Thunderbird.

This includes Interstate 40 between mile markers 165 and 178.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a storm shelter, safe room 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 3519 9742 3529 9747 3553 9707 3531 9705
TIME...MOT...LOC 0536Z 243DEG 41KT 3526 9741 

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

$$

Mahale

2 follow-up statements

652 
WWUS54 KOUN 270545
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
1245 AM CDT Wed Oct 27 2021

OKC027-081-109-125-270600-
/O.CON.KOUN.TO.W.0046.000000T0000Z-211027T0600Z/
Lincoln OK-Oklahoma OK-Cleveland OK-Pottawatomie OK-
1245 AM CDT Wed Oct 27 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 100 AM CDT FOR
SOUTHWESTERN LINCOLN...SOUTHEASTERN OKLAHOMA...NORTHEASTERN CLEVELAND
AND NORTHWESTERN POTTAWATOMIE COUNTIES...
    
At 1244 AM CDT, a severe thunderstorm capable of producing a tornado
was located over southeastern Oklahoma City, or near Stanley Draper
Lake, moving northeast at 40 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.

Locations impacted include...
Southeastern Oklahoma City, eastern Norman, Choctaw, Harrah, McLoud,
Stanley Draper Lake, Stella, Newalla and northern Lake Thunderbird.

This includes Interstate 40 between mile markers 165 and 178.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a storm shelter, safe room, 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 3522 9733 3532 9742 3553 9707 3531 9705
TIME...MOT...LOC 0544Z 235DEG 37KT 3531 9732 

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

$$

Mahale

633 
WWUS54 KOUN 270556
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
1256 AM CDT Wed Oct 27 2021

OKC027-081-109-125-270606-
/O.EXP.KOUN.TO.W.0046.000000T0000Z-211027T0600Z/
Lincoln OK-Oklahoma OK-Cleveland OK-Pottawatomie OK-
1256 AM CDT Wed Oct 27 2021

...THE TORNADO WARNING FOR SOUTHWESTERN LINCOLN...SOUTHEASTERN
OKLAHOMA...NORTHEASTERN CLEVELAND AND NORTHWESTERN POTTAWATOMIE
COUNTIES WILL EXPIRE AT 100 AM CDT...
    
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.

Remember, a Severe Thunderstorm Warning still remains in effect. 
Brief circulations may still develop along the leading edge of the 
line.

LAT...LON 3522 9733 3532 9742 3553 9707 3531 9705
TIME...MOT...LOC 0556Z 243DEG 41KT 3537 9717 

$$

Mahale

The office that day

Everything else NWS Norman, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 26, 7:01 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Harper, Woods, Woodward	18 min
Oct 26, 7:06 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Roger Mills	39 min
Oct 26, 7:22 PM CDT	Special Weather Statement	OUN	Ellis	38 min
Oct 26, 7:42 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Roger Mills	48 min
Oct 26, 7:55 PM CDT	Tornado Warning	OUN	Beckham, Roger Mills	35 min
Oct 26, 7:57 PM CDT	Special Weather Statement	OUN	Woodward	33 min
Oct 26, 8:05 PM CDT	Severe Thunderstorm Warning	OUN	Dewey, Ellis, Roger Mills, Woodward	40 min
Oct 26, 8:07 PM CDT	Severe Thunderstorm Warning	OUN	Harper, Woods, Woodward	38 min
Oct 26, 8:10 PM CDT	Severe Thunderstorm Warning	OUN	Harper, Woods	16 min
Oct 26, 8:41 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Custer, Dewey, Ellis, Harper, Major, Roger Mills and 2 more	49 min
Oct 26, 9:10 PM CDT	Severe Thunderstorm Warning Destructive damage threat	OUN	Jackson, Tillman	65 min
Oct 26, 9:22 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Harmon, Jackson, Tillman	38 min
Oct 26, 9:31 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Alfalfa, Dewey, Major, Woods, Woodward	44 min
Oct 26, 9:59 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Comanche, Greer, Jackson, Kiowa, Tillman	46 min
Oct 26, 10:11 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Major, Woods	22 min
Oct 26, 10:12 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Tillman	33 min
Oct 26, 10:38 PM CDT	Special Weather Statement	OUN	Woods	37 min
Oct 26, 10:42 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Cotton, Kiowa, Tillman, Washita	63 min
Oct 26, 10:43 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Woods	35 min
Oct 26, 11:08 PM CDT	Special Weather Statement	OUN	Alfalfa	37 min
Oct 26, 11:22 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Caddo, Canadian, Comanche, Garvin, Grady, McClain and 1 more	38 min
Oct 26, 11:36 PM CDT	Special Weather Statement	OUN	Blaine, Kingfisher	24 min
Oct 26, 11:52 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Blaine, Canadian, Cleveland, Garvin, Grady, Kingfisher and 3 more	53 min
Oct 26, 11:53 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Garfield, Grant, Major	52 min
Oct 27, 12:11 AM CDT	Special Weather Statement	OUN	Garfield	34 min
Oct 27, 12:43 AM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Cleveland, Garvin, Lincoln, Logan, McClain, Oklahoma and 4 more	47 min
Oct 27, 1:27 AM CDT	Severe Thunderstorm Warning	OUN	Coal, Garvin, Hughes, Lincoln, McClain, Payne and 3 more	27 min
Oct 27, 2:28 AM CDT	Wind Advisory	OUN	Beckham, Custer, Dewey, Ellis, Greer, Harmon and 7 more	17 hr
Oct 27, 1:38 PM CDT	Wind Advisory	OUN	Alfalfa, Atoka, Beckham, Blaine, Bryan, Caddo and 42 more	31 hr

Nearby

Tornado Warnings in Oklahoma, 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.