Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 310, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Jun 12, 2021, 4:17 AM CDT for 9 counties in Oklahoma; Clay County, Texas. It was in force for 43 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
- Jun 12, 2021, 4:17 AM CDT (09:17 UTC)
- Expired
- Jun 12, 2021, 5:00 AM CDT
- In force
- 43 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Carter County, OK, Cotton County, OK, Garvin County, OK, Jefferson County, OK, Johnston County, OK, Love County, OK, Marshall County, OK, Murray County, OK, Stephens County, OK, Clay County, TX
The radar
The Altus AFB radar (KFDR), 130 km from the middle of the area, began a volume at 09:19 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 |
|---|---|---|---|
| Jun 12, 4:20 AM CDT | TSTM WND GST 66 | 1 N Ringling, OK |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 9.3 hours before the alert went out and 133 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
- 3394 J/kg
- Mixed-layer CIN
- -216 J/kg
- Mixed-layer LCL
- 1175 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 55 m²/s²
- 0-3 km storm-relative helicity
- 225 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted.
527
WUUS54 KOUN 120917
SVROUN
OKC019-033-049-067-069-085-095-099-137-TXC077-121000-
/O.NEW.KOUN.SV.W.0310.210612T0917Z-210612T1000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
417 AM CDT Sat Jun 12 2021
The National Weather Service in Norman has issued a
* Severe Thunderstorm Warning for...
Western Johnston County in southeastern Oklahoma...
Jefferson County in southern Oklahoma...
Southeastern Garvin County in southern Oklahoma...
Love County in southern Oklahoma...
Southern Stephens County in southern Oklahoma...
East central Cotton County in southwestern Oklahoma...
Carter County in southern Oklahoma...
Northern Marshall County in southeastern Oklahoma...
Murray County in southern Oklahoma...
Northeastern Clay County in northern Texas...
* Until 500 AM CDT.
* At 417 AM CDT, severe thunderstorms were located along a line
extending from near Mill Creek to 5 miles southeast of Milo to 6
miles west of Ringling to 5 miles northeast of Byers, moving
southeast at 35 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Ardmore, Sulphur, Madill, Tishomingo, Davis, Waurika, Lone Grove,
Healdton, Wynnewood, Wilson, Comanche, Dickson, Ringling, Temple,
Mannsville, Ryan, Springer, Velma, Ravia and Terral.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3389 9798 3387 9798 3427 9830 3446 9786
3460 9738 3473 9703 3412 9656 3399 9698
3391 9734 3389 9745 3392 9749 3390 9759
3395 9759 3399 9767 3394 9773 3393 9776
3389 9778 3390 9780 3386 9783 3385 9787
TIME...MOT...LOC 0917Z 321DEG 28KT 3437 9685 3429 9726 3421 9769 3412
9812
HAIL...1.00IN
WIND...60MPH
$$
301 follow-up statement
063
WWUS54 KOUN 120929
SVSOUN
Severe Weather Statement
National Weather Service Norman OK
429 AM CDT Sat Jun 12 2021
OKC019-033-049-067-069-085-095-099-137-TXC077-121000-
/O.CON.KOUN.SV.W.0310.000000T0000Z-210612T1000Z/
Johnston OK-Jefferson OK-Garvin OK-Love OK-Stephens OK-Cotton OK-
Carter OK-Marshall OK-Murray OK-Clay TX-
429 AM CDT Sat Jun 12 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 AM CDT
FOR WESTERN JOHNSTON...JEFFERSON...SOUTHEASTERN GARVIN...LOVE...
SOUTHERN STEPHENS...EAST CENTRAL COTTON...CARTER...NORTHERN
MARSHALL...MURRAY AND NORTHEASTERN CLAY COUNTIES...
At 429 AM CDT, severe thunderstorms were located along a line
extending from near Ravia to near Ardmore to 5 miles south of
Ringling to 4 miles west of Ryan, moving southeast at 30 mph.
HAZARD...70 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect considerable
tree damage. Wind damage is also likely to mobile homes,
roofs, and outbuildings.
Locations impacted include...
Ardmore, Sulphur, Madill, Tishomingo, Davis, Waurika, Lone Grove,
Healdton, Wynnewood, Wilson, Comanche, Dickson, Ringling, Temple,
Mannsville, Ryan, Springer, Velma, Ravia and Terral.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3389 9798 3387 9798 3427 9830 3446 9786
3460 9738 3473 9703 3412 9656 3399 9698
3391 9734 3389 9745 3392 9749 3390 9759
3395 9759 3399 9767 3394 9773 3393 9776
3389 9778 3390 9780 3386 9783 3385 9787
TIME...MOT...LOC 0929Z 312DEG 28KT 3427 9677 3419 9718 3411 9761 3402
9804
HAIL...1.00IN
WIND...70MPH
$$
30The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 11, 10:17 PM CDT | Special Weather Statement | OUN | Kay | 13 min |
| Jun 11, 10:23 PM CDT | Severe Thunderstorm Warning | OUN | Kay | 52 min |
| Jun 11, 10:35 PM CDT | Severe Thunderstorm Warning | OUN | Grant | 40 min |
| Jun 11, 10:48 PM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Grant | 27 min |
| Jun 11, 10:59 PM CDT | Severe Thunderstorm Warning | OUN | Grant, Kay | 16 min |
| Jun 11, 11:08 PM CDT | Severe Thunderstorm Warning | OUN | Kay, Noble | 52 min |
| Jun 11, 11:14 PM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Garfield, Grant, Kay, Major, Noble and 1 more | 46 min |
| Jun 11, 11:34 PM CDT | Special Weather Statement | OUN | Payne | 26 min |
| Jun 11, 11:58 PM CDT | Severe Thunderstorm Warning | OUN | Lincoln, Logan, Noble, Payne | 47 min |
| Jun 12, 12:01 AM CDT | Special Weather Statement | OUN | Alfalfa, Garfield, Logan | 29 min |
| Jun 12, 12:10 AM CDT | Areal Flood Advisory | OUN | Alfalfa, Garfield, Grant | 3 hr |
| Jun 12, 12:26 AM CDT | Severe Thunderstorm Warning | OUN | Alfalfa | 33 min |
| Jun 12, 12:33 AM CDT | Special Weather Statement | OUN | Kingfisher, Logan | 27 min |
| Jun 12, 12:44 AM CDT | Special Weather Statement | OUN | Lincoln, Oklahoma, Payne | 31 min |
| Jun 12, 1:05 AM CDT | Severe Thunderstorm Warning | OUN | Lincoln | 40 min |
| Jun 12, 1:07 AM CDT | Special Weather Statement | OUN | Canadian, Kingfisher, Logan, Oklahoma | 38 min |
| Jun 12, 1:42 AM CDT | Special Weather Statement | OUN | Blaine, Canadian, Cleveland, Grady, Lincoln, McClain and 3 more | 48 min |
| Jun 12, 2:19 AM CDT | Special Weather Statement | OUN | Caddo, Comanche, Grady | 41 min |
| Jun 12, 2:37 AM CDT | Severe Thunderstorm Warning | OUN | Caddo, Comanche, Grady | 38 min |
| Jun 12, 2:40 AM CDT | Special Weather Statement | OUN | Cleveland, McClain, Pottawatomie, Seminole | 35 min |
| Jun 12, 2:45 AM CDT | Special Weather Statement | OUN | Washita | 30 min |
| Jun 12, 3:00 AM CDT | Severe Thunderstorm Warning | OUN | Caddo, Comanche, Garvin, Grady, McClain, Stephens | 45 min |
| Jun 12, 3:10 AM CDT | Special Weather Statement | OUN | Hughes, Pontotoc, Seminole | 50 min |
| Jun 12, 3:39 AM CDT | Severe Thunderstorm Warning | OUN | Carter, Comanche, Cotton, Garvin, Grady, Jefferson and 3 more | 51 min |
| Jun 12, 3:58 AM CDT | Special Weather Statement | OUN | Coal, Hughes, Johnston, Pontotoc | 32 min |
| Jun 12, 4:49 AM CDT | Severe Thunderstorm Warning | OUN | Bryan, Carter, Jefferson, Johnston, Love, Marshall | 41 min |
| Jun 12, 5:33 AM CDT | Special Weather Statement | OUN | Bryan, Love, Marshall | 27 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2021Severe Thunderstorm Warnings in Texas, 2021Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.