Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 586, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Dec 17, 2021, 4:41 PM CST for Carter County, Jefferson County, Oklahoma. It was in force for 49 min. 2 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
- Dec 17, 2021, 4:41 PM CST (22:41 UTC)
- Expired
- Dec 17, 2021, 5:30 PM CST
- In force
- 49 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Carter County, OK, Jefferson County, OK
The radar
The Altus AFB radar (KFDR), 130 km from the middle of the area, began a volume at 22:44 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 |
|---|---|---|---|
| Dec 17, 4:45 PM CST | TSTM WND DMG | 10 W Ringling, OK | AT LEAST 6 POWER POLES DOWN ALONG US 70. TIME ESTIMATED FROM RADAR. |
| Dec 17, 5:05 PM CST | TSTM WND GST 60 | 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
Fort Worth, TX (KFWD), launched 12:00Z, 10.7 hours before the alert went out and 149 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
- 808 J/kg
- Mixed-layer CIN
- -56 J/kg
- Mixed-layer LCL
- 575 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 300 m²/s²
- 0-3 km storm-relative helicity
- 300 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.3
The text
As transmitted.
886
WUUS54 KOUN 172241
SVROUN
OKC019-067-172330-
/O.NEW.KOUN.SV.W.0586.211217T2241Z-211217T2330Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
441 PM CST Fri Dec 17 2021
The National Weather Service in Norman has issued a
* Severe Thunderstorm Warning for...
Northeastern Jefferson County in southern Oklahoma...
Southwestern Carter County in southern Oklahoma...
* Until 530 PM CST.
* At 441 PM CST, a severe thunderstorm was located 8 miles northwest
of Grady, moving east at 30 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...
Lone Grove, Healdton, Wilson, Ringling, Milo and Cornish.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3418 9786 3438 9728 3411 9719 3407 9756
3406 9756 3403 9782
TIME...MOT...LOC 2241Z 252DEG 28KT 3412 9775
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Zwink1 follow-up statement
292
WWUS54 KOUN 172309
SVSOUN
Severe Weather Statement
National Weather Service Norman OK
509 PM CST Fri Dec 17 2021
OKC019-067-172330-
/O.CON.KOUN.SV.W.0586.000000T0000Z-211217T2330Z/
Jefferson OK-Carter OK-
509 PM CST Fri Dec 17 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM CST
FOR NORTHEASTERN JEFFERSON AND SOUTHWESTERN CARTER COUNTIES...
At 509 PM CST, a severe thunderstorm was located near Healdton,
moving east at 30 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Lone Grove, Healdton, Wilson, Ringling, Milo and Cornish.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3421 9722 3413 9759 3415 9764 3425 9766
3438 9728
TIME...MOT...LOC 2309Z 252DEG 28KT 3419 9750
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
ZwinkThe office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 17, 7:42 AM CST | Special Weather Statement | OUN | Garvin | 33 min |
| Dec 17, 2:47 PM CST | Special Weather Statement | OUN | Garvin | 28 min |
| Dec 17, 3:06 PM CST | Special Weather Statement | OUN | Seminole | 24 min |
| Dec 17, 3:16 PM CST | Special Weather Statement | OUN | Pontotoc | 29 min |
| Dec 17, 3:18 PM CST | Severe Thunderstorm Warning | OUN | Cotton, Jefferson | 42 min |
| Dec 17, 3:28 PM CST | Severe Thunderstorm Warning | OUN | Hughes, Pontotoc, Seminole | 47 min |
| Dec 17, 3:58 PM CST | Severe Thunderstorm Warning | OUN | Jefferson, Stephens | 47 min |
| Dec 17, 4:10 PM CST | Severe Thunderstorm Warning | OUN | Hughes, Pontotoc, Seminole | 50 min |
| Dec 17, 4:22 PM CST | Severe Thunderstorm Warning | OUN | Jefferson, Stephens | 23 min |
| Dec 17, 4:31 PM CST | Special Weather Statement | OUN | Murray | 29 min |
| Dec 17, 5:02 PM CST | Special Weather Statement | OUN | Hughes | 28 min |
| Dec 17, 5:04 PM CST | Special Weather Statement | OUN | Murray | 26 min |
| Dec 17, 5:14 PM CST | Severe Thunderstorm Warning | OUN | Garvin, Murray, Pontotoc | 46 min |
| Dec 17, 5:22 PM CST | Special Weather Statement | OUN | McClain | 23 min |
| Dec 17, 5:27 PM CST | Severe Thunderstorm Warning | OUN | Carter, Murray | 48 min |
| Dec 17, 5:34 PM CST | Severe Thunderstorm Warning | OUN | Cleveland, Garvin, McClain | 41 min |
| Dec 17, 5:37 PM CST | Special Weather Statement | OUN | Jefferson | 23 min |
| Dec 17, 5:42 PM CST | Special Weather Statement | OUN | Hughes | 33 min |
| Dec 17, 5:57 PM CST | Severe Thunderstorm Warning | OUN | Coal, Hughes, Pontotoc, Seminole | 48 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.