Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 447, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Aug 13, 2021, 3:43 PM CDT for Lincoln County, Oklahoma County, Pottawatomie County, Oklahoma. It was in force for 47 min. 3 reports 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
- Aug 13, 2021, 3:43 PM CDT (20:43 UTC)
- Expired
- Aug 13, 2021, 4:30 PM CDT
- In force
- 47 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 0.88 in
- Wind
- 60.0 mph
Counties Lincoln County, OK, Oklahoma County, OK, Pottawatomie County, OK
The radar
The Norman radar (KTLX), 27 km from the middle of the area, began a volume at 20:44 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 |
|---|---|---|---|
| Aug 13, 3:45 PM CDT | TSTM WND DMG | Edmond, OK | TREE LIMBS DOWNED. POWER POLE DAMAGED. COVERED PORCH DAMAGED. |
| Aug 13, 3:46 PM CDT | TSTM WND GST 60 | Edmond, OK | |
| Aug 13, 3:55 PM CDT | TSTM WND DMG | 3 Se Edmond, OK | POWERLINES DOWNED I-35 AND MEMORIAL RD. RADAR ESTIMATED TIME. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Fort Worth, TX (KFWD), launched 12:00Z, 8.7 hours before the alert went out and 302 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
- 1472 J/kg
- Mixed-layer CIN
- -104 J/kg
- Mixed-layer LCL
- 1221 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- -71 m²/s²
- 0-3 km storm-relative helicity
- 7 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
248
WUUS54 KOUN 132043
SVROUN
OKC081-109-125-132130-
/O.NEW.KOUN.SV.W.0447.210813T2043Z-210813T2130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
343 PM CDT Fri Aug 13 2021
The National Weather Service in Norman has issued a
* Severe Thunderstorm Warning for...
Southern Lincoln County in central Oklahoma...
Oklahoma County in central Oklahoma...
Northwestern Pottawatomie County in central Oklahoma...
* Until 430 PM CDT.
* At 342 PM CDT, severe thunderstorms were located along a line
extending from 6 miles north of Meeker to 5 miles northeast of
Harrah to near Oklahoma City to 3 miles northeast of The Village,
and are nearly stationary.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Northeastern Oklahoma City, Edmond, Midwest City, Shawnee, Del
City, Chandler, Choctaw, The Village, Harrah, McLoud, Spencer,
Nichols Hills, Jones, Nicoma Park, Prague, Luther, Meeker,
Wellston, Arcadia and Sparks.
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 3547 9668 3540 9704 3543 9739 3561 9765
3573 9767 3572 9681
TIME...MOT...LOC 2042Z 332DEG 2KT 3557 9694 3554 9712 3559 9733 3562
9752
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
032 follow-up statements
727
WWUS54 KOUN 132055
SVSOUN
Severe Weather Statement
National Weather Service Norman OK
355 PM CDT Fri Aug 13 2021
OKC081-109-125-132130-
/O.CON.KOUN.SV.W.0447.000000T0000Z-210813T2130Z/
Lincoln OK-Oklahoma OK-Pottawatomie OK-
355 PM CDT Fri Aug 13 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM CDT
FOR SOUTHERN LINCOLN...OKLAHOMA AND NORTHWESTERN POTTAWATOMIE
COUNTIES...
At 354 PM CDT, severe thunderstorms were located along a line
extending from 6 miles northwest of Meeker to 5 miles northeast of
Harrah to near Oklahoma City to 3 miles northeast of The Village,
moving south at 5 mph.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Public.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Northeastern Oklahoma City, Edmond, Midwest City, Shawnee, Del City,
Chandler, Choctaw, The Village, Harrah, McLoud, Spencer, Nichols
Hills, Jones, Nicoma Park, Prague, Luther, Meeker, Wellston, Arcadia
and Sparks.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3547 9668 3540 9704 3543 9739 3561 9765
3573 9767 3572 9681
TIME...MOT...LOC 2054Z 346DEG 5KT 3557 9694 3554 9712 3555 9732 3562
9752
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
03974
WWUS54 KOUN 132120
SVSOUN
Severe Weather Statement
National Weather Service Norman OK
420 PM CDT Fri Aug 13 2021
OKC081-109-125-132130-
/O.CON.KOUN.SV.W.0447.000000T0000Z-210813T2130Z/
Lincoln OK-Oklahoma OK-Pottawatomie OK-
420 PM CDT Fri Aug 13 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM CDT
FOR SOUTHERN LINCOLN...CENTRAL OKLAHOMA AND NORTHWESTERN POTTAWATOMIE
COUNTIES...
At 419 PM CDT, severe thunderstorms were located along a line
extending from 5 miles northwest of Prague to near Choctaw, moving
southeast at 15 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Public.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Northeastern Oklahoma City, Edmond, Midwest City, Shawnee, Del City,
Chandler, Choctaw, The Village, Harrah, McLoud, Spencer, Nichols
Hills, Jones, Nicoma Park, Prague, Meeker, Arcadia, Sparks, Tinker
Air Force Base and Forest Park.
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 3547 9668 3540 9704 3543 9739 3561 9765
3573 9752 3573 9751 3564 9714 3572 9681
TIME...MOT...LOC 2119Z 297DEG 15KT 3555 9675 3547 9728
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
03The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 13, 1:57 AM CDT | Special Weather Statement | OUN | Ellis, Woods, Woodward | 33 min |
| Aug 13, 2:21 PM CDT | Special Weather Statement | OUN | Payne | 24 min |
| Aug 13, 2:41 PM CDT | Special Weather Statement | OUN | Oklahoma | 34 min |
| Aug 13, 3:15 PM CDT | Special Weather Statement | OUN | Oklahoma | 45 min |
| Aug 13, 3:20 PM CDT | Severe Thunderstorm Warning | OUN | Canadian, Oklahoma | 40 min |
| Aug 13, 3:23 PM CDT | Severe Thunderstorm Warning | OUN | Harmon | 52 min |
| Aug 13, 3:25 PM CDT | Special Weather Statement | OUN | Lincoln | 50 min |
| Aug 13, 3:26 PM CDT | Areal Flood Advisory | OUN | Oklahoma | 3 hr |
| Aug 13, 3:40 PM CDT | Flash Flood Warning | OUN | Oklahoma | 3 hr |
| Aug 13, 3:52 PM CDT | Areal Flood Advisory | OUN | Harmon | 3 hr |
| Aug 13, 3:57 PM CDT | Special Weather Statement | OUN | Greer | 33 min |
| Aug 13, 4:28 PM CDT | Areal Flood Advisory | OUN | Lincoln, Oklahoma | 3 hr |
| Aug 13, 4:28 PM CDT | Special Weather Statement | OUN | Marshall | 47 min |
| Aug 13, 4:33 PM CDT | Special Weather Statement | OUN | Cleveland | 57 min |
| Aug 13, 4:35 PM CDT | Special Weather Statement | OUN | Lincoln | 25 min |
| Aug 13, 4:47 PM CDT | Special Weather Statement | OUN | Greer | 28 min |
| Aug 13, 4:52 PM CDT | Areal Flood Advisory | OUN | Greer | 3 hr |
| Aug 13, 4:54 PM CDT | Special Weather Statement | OUN | Canadian | 36 min |
| Aug 13, 5:07 PM CDT | Special Weather Statement | OUN | Canadian | 23 min |
| Aug 13, 5:10 PM CDT | Severe Thunderstorm Warning | OUN | Greer, Kiowa | 50 min |
| Aug 13, 5:11 PM CDT | Special Weather Statement | OUN | Lincoln | 49 min |
| Aug 13, 5:15 PM CDT | Special Weather Statement | OUN | Roger Mills | 30 min |
| Aug 13, 5:19 PM CDT | Special Weather Statement | OUN | Jackson | 41 min |
| Aug 13, 5:31 PM CDT | Special Weather Statement | OUN | Cotton | 29 min |
| Aug 13, 5:55 PM CDT | Areal Flood Advisory | OUN | Canadian | 3 hr |
| Aug 13, 5:56 PM CDT | Special Weather Statement | OUN | Grady | 34 min |
| Aug 13, 6:03 PM CDT | Special Weather Statement | OUN | Tillman | 27 min |
| Aug 13, 6:06 PM CDT | Special Weather Statement | OUN | Greer | 24 min |
| Aug 13, 6:09 PM CDT | Special Weather Statement | OUN | Roger Mills | 36 min |
| Aug 13, 6:14 PM CDT | Special Weather Statement | OUN | Tillman | 31 min |
| Aug 13, 6:25 PM CDT | Special Weather Statement | OUN | Custer | 35 min |
| Aug 13, 6:35 PM CDT | Special Weather Statement | OUN | Beckham | 25 min |
| Aug 13, 6:39 PM CDT | Areal Flood Advisory | OUN | Greer, Kiowa | 3 hr |
| Aug 13, 6:41 PM CDT | Special Weather Statement | OUN | Washita | 34 min |
| Aug 13, 6:43 PM CDT | Special Weather Statement | OUN | Washita | 32 min |
| Aug 13, 6:47 PM CDT | Areal Flood Advisory | OUN | Custer, Dewey | 3 hr |
| Aug 13, 6:49 PM CDT | Special Weather Statement | OUN | Beckham | 26 min |
| Aug 13, 6:53 PM CDT | Severe Thunderstorm Warning | OUN | Beckham | 27 min |
| Aug 13, 6:54 PM CDT | Severe Thunderstorm Warning | OUN | Washita | 51 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 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.