Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 94, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Apr 23, 2021, 4:42 PM CDT for Canadian County, Grady County, Oklahoma County, Oklahoma. It was in force for 33 min. 6 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
- Apr 23, 2021, 4:42 PM CDT (21:42 UTC)
- Expired
- Apr 23, 2021, 5:15 PM CDT
- In force
- 33 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Canadian County, OK, Grady County, OK, Oklahoma County, OK
The radar
The Norman radar (KTLX), 40 km from the middle of the area, began a volume at 21:46 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 |
|---|---|---|---|
| Apr 23, 4:52 PM CDT | HAIL 0.5 | 4 Se Yukon, OK | MPING |
| Apr 23, 4:52 PM CDT | HAIL 1 | 2 E Yukon, OK | NICKEL TO QUARTER HAIL. |
| Apr 23, 4:53 PM CDT | HAIL 1 | 4 Sse Yukon, OK | MPING. |
| Apr 23, 4:56 PM CDT | HAIL 1 | S Yukon, OK | MPING |
| Apr 23, 5:00 PM CDT | HAIL 0.75 | 10 W Edmond, OK | TWITTER REPORT. |
| Apr 23, 5:07 PM CDT | HAIL 0.25 | 3 S Piedmont, OK | MPING |
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 12:00Z, 9.7 hours before the alert went out and 39 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
- 751 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 284 m²/s²
- 0-3 km storm-relative helicity
- 202 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
394
WUUS54 KOUN 232142
SVROUN
OKC017-051-109-232215-
/O.NEW.KOUN.SV.W.0094.210423T2142Z-210423T2215Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
442 PM CDT Fri Apr 23 2021
The National Weather Service in Norman has issued a
* Severe Thunderstorm Warning for...
Northeastern Grady County in central Oklahoma...
Western Oklahoma County in central Oklahoma...
Eastern Canadian County in central Oklahoma...
* Until 515 PM CDT.
* At 442 PM CDT, a severe thunderstorm was located over southwestern
Oklahoma City, or 4 miles west of Mustang, moving northeast at 45
mph.
HAZARD...Quarter size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
* Locations impacted include...
Western Oklahoma City, western Edmond, El Reno, Yukon, Bethany,
Mustang, Warr Acres, The Village, Tuttle, Piedmont, Nichols Hills,
Union City, Minco, Woodlawn Park and Richland.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3572 9745 3538 9764 3538 9767 3533 9767
3529 9769 3535 9794 3572 9790
TIME...MOT...LOC 2142Z 205DEG 37KT 3538 9781
HAIL...1.00IN
WIND...<50MPH
$$
TL2 follow-up statements
384
WWUS54 KOUN 232157
SVSOUN
Severe Weather Statement
National Weather Service Norman OK
457 PM CDT Fri Apr 23 2021
OKC051-232206-
/O.CAN.KOUN.SV.W.0094.000000T0000Z-210423T2215Z/
Grady OK-
457 PM CDT Fri Apr 23 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN GRADY COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3572 9745 3541 9767 3540 9791 3572 9790
TIME...MOT...LOC 2156Z 198DEG 45KT 3557 9774
$$
OKC017-109-232215-
/O.CON.KOUN.SV.W.0094.000000T0000Z-210423T2215Z/
Oklahoma OK-Canadian OK-
457 PM CDT Fri Apr 23 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR NORTHWESTERN OKLAHOMA AND EASTERN CANADIAN COUNTIES...
At 456 PM CDT, a severe thunderstorm was located over Yukon, moving
north at 50 mph.
HAZARD...Quarter size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
Locations impacted include...
Northwestern Oklahoma City, northwestern Edmond, El Reno, Yukon,
Bethany, Warr Acres, The Village, Piedmont, Woodlawn Park and
Richland.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3572 9745 3541 9767 3540 9791 3572 9790
TIME...MOT...LOC 2156Z 198DEG 45KT 3557 9774
HAIL...1.00IN
WIND...<50MPH
$$
TL688 WWUS54 KOUN 232207 SVSOUN Severe Weather Statement National Weather Service Norman OK 507 PM CDT Fri Apr 23 2021 OKC017-109-232215- /O.CON.KOUN.SV.W.0094.000000T0000Z-210423T2215Z/ Oklahoma OK-Canadian OK- 507 PM CDT Fri Apr 23 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT FOR NORTHWESTERN OKLAHOMA AND NORTHEASTERN CANADIAN COUNTIES... At 507 PM CDT, a severe thunderstorm was located over northwestern Oklahoma City, or 4 miles southeast of Piedmont, moving northeast at 35 mph. HAZARD...Quarter size hail. SOURCE...Trained weather spotters. IMPACT...Damage to vehicles is expected. Locations impacted include... Northwestern Oklahoma City, northwestern Edmond, Yukon, Bethany, Warr Acres, Piedmont, Woodlawn Park and Richland. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 3572 9745 3549 9767 3551 9787 3572 9790 TIME...MOT...LOC 2207Z 205DEG 33KT 3561 9771 HAIL...1.00IN WIND...<50MPH $$ TL
The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 23, 1:21 PM CDT | Special Weather Statement | OUN | Cotton | 24 min |
| Apr 23, 1:23 PM CDT | Special Weather Statement | OUN | Comanche | 37 min |
| Apr 23, 1:45 PM CDT | Special Weather Statement | OUN | Stephens | 30 min |
| Apr 23, 1:49 PM CDT | Special Weather Statement | OUN | Grady | 26 min |
| Apr 23, 2:18 PM CDT | Special Weather Statement | OUN | McClain | 27 min |
| Apr 23, 2:44 PM CDT | Special Weather Statement | OUN | Jefferson | 31 min |
| Apr 23, 2:46 PM CDT | Special Weather Statement | OUN | McClain | 29 min |
| Apr 23, 3:05 PM CDT | Severe Thunderstorm Warning | OUN | Carter, Garvin, Jefferson, Murray, Stephens | 40 min |
| Apr 23, 3:21 PM CDT | Special Weather Statement | OUN | Love | 24 min |
| Apr 23, 3:47 PM CDT | Special Weather Statement | OUN | Garvin, McClain | 28 min |
| Apr 23, 3:47 PM CDT | Special Weather Statement | OUN | Blaine | 28 min |
| Apr 23, 3:50 PM CDT | Special Weather Statement | OUN | Marshall | 25 min |
| Apr 23, 4:18 PM CDT | Special Weather Statement | OUN | Love | 27 min |
| Apr 23, 4:30 PM CDT | Severe Thunderstorm Warning | OUN | Carter, Johnston, Love, Marshall | 45 min |
| Apr 23, 4:32 PM CDT | Special Weather Statement | OUN | Kingfisher | 28 min |
| Apr 23, 4:33 PM CDT | Special Weather Statement | OUN | Oklahoma | 27 min |
| Apr 23, 5:03 PM CDT | Special Weather Statement | OUN | Noble | 27 min |
| Apr 23, 5:14 PM CDT | Special Weather Statement | OUN | Logan | 31 min |
| Apr 23, 5:59 PM CDT | Special Weather Statement | OUN | Garfield | 31 min |
| Apr 23, 6:13 PM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Garfield, Grant | 47 min |
| Apr 23, 6:18 PM CDT | Special Weather Statement | OUN | Garfield | 27 min |
| Apr 23, 6:30 PM CDT | Severe Thunderstorm Warning | OUN | Comanche, Cotton, Kiowa, Tillman | 45 min |
| Apr 23, 6:32 PM CDT | Special Weather Statement | OUN | Harmon | 28 min |
| Apr 23, 6:58 PM CDT | Special Weather Statement | OUN | Grant | 32 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.