Alert archive / Oklahoma / Tornado Warnings in 2021
Tornado Warning 21, NWS Norman, OK
NWS Norman, OK issued this tornado warning at May 16, 2021, 4:30 PM CDT for Carter County, Jefferson County, Stephens County, Oklahoma. It was in force for 30 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
- May 16, 2021, 4:30 PM CDT (21:30 UTC)
- Expired
- May 16, 2021, 5:00 PM CDT
- In force
- 30 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Carter County, OK, Jefferson County, OK, Stephens County, OK
The radar
The Altus AFB radar (KFDR), 120 km from the middle of the area, began a volume at 21:32 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
Amarillo Airport, TX (KAMA), launched 12:00Z, 9.5 hours before the alert went out and 384 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1470 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- -57 m²/s²
- 0-3 km storm-relative helicity
- -16 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
463
WFUS54 KOUN 162130
TOROUN
OKC019-067-137-162200-
/O.NEW.KOUN.TO.W.0021.210516T2130Z-210516T2200Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Norman OK
430 PM CDT Sun May 16 2021
The National Weather Service in Norman has issued a
* Tornado Warning for...
Northeastern Jefferson County in southern Oklahoma...
Southeastern Stephens County in southern Oklahoma...
West central Carter County in southern Oklahoma...
* Until 500 PM CDT.
* At 430 PM CDT, severe thunderstorms capable of producing a tornado
were located 4 miles south of Loco and 7 miles east of Addington,
moving east at 10 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.
* These tornadic storms will remain over mainly rural areas of
northeastern Jefferson, southeastern Stephens and west central
Carter Counties.
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.
This line of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.
&&
LAT...LON 3431 9744 3415 9769 3420 9793 3429 9787
TIME...MOT...LOC 2130Z 272DEG 11KT 3427 9768 3423 9784
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
112 follow-up statements
867
WWUS54 KOUN 162143
SVSOUN
Severe Weather Statement
National Weather Service Norman OK
443 PM CDT Sun May 16 2021
OKC137-162152-
/O.CAN.KOUN.TO.W.0021.000000T0000Z-210516T2200Z/
Stephens OK-
443 PM CDT Sun May 16 2021
...THE TORNADO WARNING FOR SOUTHEASTERN STEPHENS COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of Stephens
county and no longer pose a threat for tornadoes. Therefore, the
warning has been cancelled.
LAT...LON 3419 9786 3429 9780 3429 9756 3430 9756
3430 9746 3425 9752 3415 9769
TIME...MOT...LOC 2142Z 270DEG 10KT 3427 9766 3423 9780
$$
OKC019-067-162200-
/O.CON.KOUN.TO.W.0021.000000T0000Z-210516T2200Z/
Jefferson OK-Carter OK-
443 PM CDT Sun May 16 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 500 PM CDT FOR
NORTHEASTERN JEFFERSON AND WEST CENTRAL CARTER COUNTIES...
At 442 PM CDT, severe thunderstorms capable of producing tornadoes
were located along a line extending from 4 miles south of Loco to 9
miles east of Addington, moving east at 10 mph.
HAZARD...Tornado and quarter size hail.
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.
These tornadic storms will remain over mainly rural areas of
northeastern Jefferson and west central Carter Counties.
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 3419 9786 3429 9780 3429 9756 3430 9756
3430 9746 3425 9752 3415 9769
TIME...MOT...LOC 2142Z 270DEG 10KT 3427 9766 3423 9780
TORNADO...RADAR INDICATED
HAIL...1.00IN
$$
11733
WWUS54 KOUN 162157
SVSOUN
Severe Weather Statement
National Weather Service Norman OK
457 PM CDT Sun May 16 2021
OKC019-067-162206-
/O.EXP.KOUN.TO.W.0021.000000T0000Z-210516T2200Z/
Jefferson OK-Carter OK-
457 PM CDT Sun May 16 2021
...THE TORNADO WARNING FOR NORTHEASTERN JEFFERSON AND WEST CENTRAL
CARTER COUNTIES WILL EXPIRE AT 500 PM CDT...
The tornado threat has diminished and the Tornado Warning has been
cancelled. However, a Severe Thunderstorm Warning remains in effect
for the area.
LAT...LON 3419 9786 3429 9780 3429 9756 3430 9756
3430 9746 3425 9752 3415 9769
TIME...MOT...LOC 2156Z 272DEG 11KT 3427 9761 3423 9775
$$
11The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 16, 3:36 AM CDT | Flood Watch | OUN | Atoka, Bryan, Caddo, Canadian, Carter, Cleveland and 25 more | 3 days |
| May 16, 12:38 PM CDT | Areal Flood Advisory | OUN | Cleveland, Grady, McClain, Oklahoma | 3 hr |
| May 16, 12:48 PM CDT | Areal Flood Advisory | OUN | Comanche, Grady, Stephens | 4 hr |
| May 16, 12:52 PM CDT | Areal Flood Advisory | OUN | Atoka, Bryan, Carter, Coal, Johnston, Marshall and 2 more | 3 hr |
| May 16, 1:13 PM CDT | Areal Flood Warning | OUN | Cleveland, Oklahoma | 4 hr |
| May 16, 3:19 PM CDT | Areal Flood Advisory | OUN | Lincoln, Logan, Oklahoma | 4 hr |
| May 16, 3:27 PM CDT | Areal Flood Advisory | OUN | Cleveland, Garvin, Grady, McClain, Pontotoc, Pottawatomie and 2 more | 5 hr |
| May 16, 3:39 PM CDT | Special Weather Statement | OUN | Cotton | 36 min |
| May 16, 3:40 PM CDT | Special Weather Statement | OUN | Stephens | 35 min |
| May 16, 3:49 PM CDT | Special Weather Statement | OUN | Tillman | 26 min |
| May 16, 3:59 PM CDT | Special Weather Statement | OUN | Seminole | 31 min |
| May 16, 4:06 PM CDT | Special Weather Statement | OUN | Stephens | 24 min |
| May 16, 4:13 PM CDT | Special Weather Statement | OUN | Carter | 32 min |
| May 16, 4:15 PM CDT | Special Weather Statement | OUN | Jefferson | 15 min |
| May 16, 4:17 PM CDT | Special Weather Statement | OUN | Pontotoc | 28 min |
| May 16, 4:38 PM CDT | Severe Thunderstorm Warning | OUN | Carter, Garvin, Jefferson, Love, Murray, Pontotoc and 1 more | 52 min |
| May 16, 4:45 PM CDT | Special Weather Statement | OUN | Seminole | 30 min |
| May 16, 5:19 PM CDT | Flash Flood Warning | OUN | Jefferson, Stephens | 3 hr |
| May 16, 5:22 PM CDT | Severe Thunderstorm Warning | OUN | Carter, Jefferson, Love | 38 min |
| May 16, 5:25 PM CDT | Areal Flood Advisory | OUN | Carter, Murray, Stephens | 3 hr |
| May 16, 5:57 PM CDT | Severe Thunderstorm Warning | OUN | Carter, Jefferson, Love, Marshall | 78 min |
| May 16, 6:16 PM CDT | Areal Flood Advisory | OUN | Jefferson | 3 hr |
| May 16, 6:42 PM CDT | Flash Flood Warning | OUN | Jefferson | 3 hr |
Nearby
Tornado Warnings in Oklahoma, 2021Every tornado warning in 2021Tornadoes 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.