Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 85, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Apr 13, 2021, 5:32 PM CDT for Caddo County, Kiowa County, Washita County, Oklahoma. It was in force for 28 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
- Apr 13, 2021, 5:32 PM CDT (22:32 UTC)
- Expired
- Apr 13, 2021, 6:00 PM CDT
- In force
- 28 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Caddo County, OK, Kiowa County, OK, Washita County, OK
The radar
The Altus AFB radar (KFDR), 90 km from the middle of the area, began a volume at 22:33 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 13, 5:57 PM CDT | HAIL 0.88 | 3 Ese Fort Cobb Reservo, 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 12:00Z, 10.5 hours before the alert went out and 108 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
- 2594 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 330 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
655
WUUS54 KOUN 132232
SVROUN
OKC015-075-149-132300-
/O.NEW.KOUN.SV.W.0085.210413T2232Z-210413T2300Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
532 PM CDT Tue Apr 13 2021
The National Weather Service in Norman has issued a
* Severe Thunderstorm Warning for...
Southeastern Washita County in western Oklahoma...
Central Caddo County in southwestern Oklahoma...
Northeastern Kiowa County in southwestern Oklahoma...
* Until 600 PM CDT.
* At 532 PM CDT, a severe thunderstorm was located 4 miles southeast
of Mountain View, moving northeast at 45 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...
Carnegie, Mountain View, Fort Cobb, Gracemont, Fort Cobb Reservoir,
Alfalfa and Albert.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3496 9872 3506 9882 3539 9843 3514 9820
TIME...MOT...LOC 2232Z 235DEG 39KT 3507 9868
HAIL...1.00IN
WIND...60MPH
$$
..speg.2 follow-up statements
568
WWUS54 KOUN 132249
SVSOUN
Severe Weather Statement
National Weather Service Norman OK
549 PM CDT Tue Apr 13 2021
OKC075-149-132258-
/O.CAN.KOUN.SV.W.0085.000000T0000Z-210413T2300Z/
Washita OK-Kiowa OK-
549 PM CDT Tue Apr 13 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WASHITA AND
NORTHEASTERN KIOWA COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved into
Caddo County . Therefore, the warning has been cancelled for Washita
and northeastern Kiowa Counties. However, additional thunderstorms
will affect southern Kiowa County.
LAT...LON 3507 9859 3519 9861 3539 9843 3514 9820
TIME...MOT...LOC 2248Z 235DEG 39KT 3517 9850
$$
OKC015-132300-
/O.CON.KOUN.SV.W.0085.000000T0000Z-210413T2300Z/
Caddo OK-
549 PM CDT Tue Apr 13 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT
FOR CENTRAL CADDO COUNTY...
At 548 PM CDT, a severe thunderstorm was located near Fort Cobb
Reservoir, moving northeast at 45 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...
Carnegie, Fort Cobb, Gracemont, Fort Cobb Reservoir and Albert.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3507 9859 3519 9861 3539 9843 3514 9820
TIME...MOT...LOC 2248Z 235DEG 39KT 3517 9850
HAIL...1.00IN
WIND...60MPH
$$
..speg.844
WWUS54 KOUN 132257
SVSOUN
Severe Weather Statement
National Weather Service Norman OK
557 PM CDT Tue Apr 13 2021
OKC015-132307-
/O.EXP.KOUN.SV.W.0085.000000T0000Z-210413T2300Z/
Caddo OK-
557 PM CDT Tue Apr 13 2021
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL CADDO COUNTY WILL
EXPIRE AT 600 PM CDT...
The storm which prompted the warning has weakened below severe
limits, therefore the warning will be allowed to expire. However
small hail and gusty winds are still possible with this thunderstorm.
LAT...LON 3507 9859 3519 9861 3539 9843 3514 9820
TIME...MOT...LOC 2257Z 235DEG 39KT 3523 9840
$$
..speg.The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 13, 4:08 AM CDT | Special Weather Statement | OUN | Atoka | 37 min |
| Apr 13, 3:57 PM CDT | Special Weather Statement | OUN | Jackson | 33 min |
| Apr 13, 5:40 PM CDT | Special Weather Statement | OUN | Comanche | 35 min |
| Apr 13, 5:41 PM CDT | Special Weather Statement | OUN | Tillman | 34 min |
| Apr 13, 6:08 PM CDT | Special Weather Statement | OUN | Jackson | 37 min |
| Apr 13, 6:17 PM CDT | Special Weather Statement | OUN | Grady | 28 min |
| Apr 13, 6:36 PM CDT | Special Weather Statement | OUN | Tillman | 24 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.