Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 482, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Sep 7, 2021, 7:51 PM CDT for 5 counties in Oklahoma. It was in force for 39 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
- Sep 7, 2021, 7:51 PM CDT (00:51 UTC)
- Expired
- Sep 7, 2021, 8:30 PM CDT
- In force
- 39 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Hail
- 1.75 in
- Wind
- 70.0 mph
Counties Blaine County, OK, Canadian County, OK, Custer County, OK, Dewey County, OK, Kingfisher County, OK
The radar
The Vance AFB radar (KVNX), 105 km from the middle of the area, began a volume at 00:52 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 |
|---|---|---|---|
| Sep 7, 7:55 PM CDT | HAIL 1 | 4 Nw Oakwood, 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, 0.9 hours before the alert went out and 125 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
- 2037 J/kg
- Mixed-layer CIN
- -90 J/kg
- Mixed-layer LCL
- 1991 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- 159 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 7.0
The text
As transmitted.
010
WUUS54 KOUN 080051
SVROUN
OKC011-017-039-043-073-080130-
/O.NEW.KOUN.SV.W.0482.210908T0051Z-210908T0130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
751 PM CDT Tue Sep 7 2021
The National Weather Service in Norman has issued a
* Severe Thunderstorm Warning for...
Kingfisher County in central Oklahoma...
Northeastern Custer County in western Oklahoma...
Blaine County in northwestern Oklahoma...
Southeastern Dewey County in northwestern Oklahoma...
Northwestern Canadian County in central Oklahoma...
* Until 830 PM CDT.
* At 751 PM CDT, severe thunderstorms were located along a line
extending from 10 miles west of Hennessey to near Hitchcock to 3
miles north of Oakwood to 5 miles south of Taloga, moving south at
20 mph.
HAZARD...Golf ball size hail and 70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect
considerable tree damage. Wind damage is also likely to
mobile homes, roofs, and outbuildings.
* Locations impacted include...
Watonga, Kingfisher, Taloga, Okeene, Thomas, Canton, Dover, Custer
City, Hitchcock, Greenfield, Loyal, Oakwood, Putnam, Eagle City,
Fay, southeastern Canton Lake, Hucmac, Southard, Omega and Lacey.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3605 9907 3617 9795 3582 9778 3566 9821
3563 9856 3565 9914
TIME...MOT...LOC 0051Z 345DEG 19KT 3612 9808 3600 9839 3598 9869 3596
9894
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
301 follow-up statement
180
WWUS54 KOUN 080115
SVSOUN
Severe Weather Statement
National Weather Service Norman OK
815 PM CDT Tue Sep 7 2021
OKC011-017-039-043-073-080130-
/O.CON.KOUN.SV.W.0482.000000T0000Z-210908T0130Z/
Kingfisher OK-Custer OK-Blaine OK-Dewey OK-Canadian OK-
815 PM CDT Tue Sep 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT
FOR KINGFISHER...NORTHEASTERN CUSTER...BLAINE...SOUTHEASTERN DEWEY
AND NORTHWESTERN CANADIAN COUNTIES...
At 814 PM CDT, severe thunderstorms were located along a line
extending from 4 miles northeast of Loyal to 4 miles northeast of
Watonga to near Fay to 5 miles northwest of Thomas, moving south at
25 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Watonga, Kingfisher, Taloga, Okeene, Thomas, Canton, Dover, Custer
City, Hitchcock, Greenfield, Loyal, Oakwood, Putnam, Eagle City, Fay,
southeastern Canton Lake, Hucmac, Southard, Omega and Lacey.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3605 9907 3617 9795 3582 9778 3566 9821
3563 9856 3565 9914
TIME...MOT...LOC 0114Z 343DEG 21KT 3600 9804 3588 9835 3583 9863 3581
9881
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
30The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 7:15 PM CDT | Special Weather Statement | OUN | Roger Mills | 30 min |
| Sep 7, 7:21 PM CDT | Severe Thunderstorm Warning | OUN | Blaine, Dewey, Kingfisher, Major | 39 min |
| Sep 7, 7:43 PM CDT | Special Weather Statement | OUN | Noble | 32 min |
| Sep 7, 8:02 PM CDT | Severe Thunderstorm Warning | OUN | Logan, Noble, Payne | 25 min |
| Sep 7, 8:21 PM CDT | Special Weather Statement | OUN | Custer | 24 min |
| Sep 7, 8:27 PM CDT | Severe Thunderstorm Warning | OUN | Blaine, Custer, Dewey | 33 min |
| Sep 7, 8:46 PM CDT | Special Weather Statement | OUN | Custer | 29 min |
| Sep 7, 9:11 PM CDT | Special Weather Statement | OUN | Beckham | 34 min |
| Sep 7, 9:19 PM CDT | Severe Thunderstorm Warning | OUN | Beckham, Greer | 41 min |
| Sep 7, 9:23 PM CDT | Special Weather Statement | OUN | Washita | 37 min |
| Sep 7, 9:40 PM CDT | Special Weather Statement | OUN | Kay | 35 min |
| Sep 8, 12:40 AM CDT | Special Weather Statement | OUN | Cotton | 35 min |
| Sep 8, 4:55 AM CDT | Special Weather Statement | OUN | Bryan | 35 min |
| Sep 8, 5:31 AM CDT | Special Weather Statement | OUN | Bryan | 29 min |
| Sep 8, 6:10 AM CDT | Special Weather Statement | OUN | Bryan | 35 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.