Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 13, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Apr 8, 2011, 7:41 PM CDT for 4 counties in Oklahoma. It was in force for 79 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Apr 8, 2011, 7:41 PM CDT (00:41 UTC)
- Expired
- Apr 8, 2011, 9:00 PM CDT
- In force
- 79 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
Counties Dewey County, OK, Major County, OK, Woods County, OK, Woodward County, OK
The radar
The Vance AFB radar (KVNX), 67 km from the middle of the area, began a volume at 00:43 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 8, 5:35 PM CDT | Tornado Watch | SPC | 9 hr |
The nearest sounding before it
Lamont, OK (KLMN), launched 00:00Z, 0.7 hours before the alert went out and 112 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
- 3252 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- -13 m²/s²
- 0-3 km storm-relative helicity
- 80 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
945
WUUS54 KOUN 090041
SVROUN
OKC043-093-151-153-090200-
/O.NEW.KOUN.SV.W.0013.110409T0041Z-110409T0200Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
741 PM CDT FRI APR 8 2011
THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHEASTERN DEWEY COUNTY IN NORTHWEST OKLAHOMA...
WESTERN MAJOR COUNTY IN NORTHWEST OKLAHOMA...
SOUTHEASTERN WOODS COUNTY IN NORTHWEST OKLAHOMA...
SOUTHEASTERN WOODWARD COUNTY IN NORTHWEST OKLAHOMA...
* UNTIL 900 PM CDT
* AT 741 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM NEAR SEILING...MOVING NORTHEAST AT 25 MPH.
HAZARDS IN THE WARNING INCLUDE...
HAIL UP TO THE SIZE OF GOLF BALLS...
WIND GUSTS TO 60 MPH...
* LOCATIONS IN THE WARNING INCLUDE CHESTER...CLEO SPRINGS...
ORIENTA...ORION AND SEILING.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH NO ADVANCE WARNING.
MOVE IMMEDIATELY TO A STORM SHELTER... BASEMENT OR STURDY BUILDING IF
A TORNADO IS SIGHTED.
&&
LAT...LON 3652 9853 3647 9852 3647 9841 3638 9841
3617 9857 3617 9864 3610 9884 3612 9901
3618 9908 3660 9897
TIME...MOT...LOC 0041Z 224DEG 20KT 3618 9893
$$
BURKE3 follow-up statements
019
WWUS54 KOUN 090105
SVSOUN
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
805 PM CDT FRI APR 8 2011
OKC043-090113-
/O.CAN.KOUN.SV.W.0013.000000T0000Z-110409T0200Z/
DEWEY OK-
805 PM CDT FRI APR 8 2011
...THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED FOR NORTHERN
DEWEY COUNTY...
LAT...LON 3652 9853 3647 9852 3647 9841 3638 9841
3617 9857 3618 9876 3622 9894 3628 9905
3660 9897
TIME...MOT...LOC 0103Z 220DEG 18KT 3627 9885
$$
OKC093-151-153-090200-
/O.CON.KOUN.SV.W.0013.000000T0000Z-110409T0200Z/
WOODWARD OK-WOODS OK-MAJOR OK-
805 PM CDT FRI APR 8 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM CDT
FOR WESTERN MAJOR...SOUTHEASTERN WOODS AND EASTERN WOODWARD
COUNTIES...
AT 803 PM CDT...NATIONAL WEATHER SERVICE RADAR DETECTED A SEVERE
THUNDERSTORM 4 MILES NORTHEAST OF CHESTER...MOVING NORTHEAST AT 20
MPH. AT 750 PM...A TRAINED STORM SPOTTER REPORTED GOLF BALL SIZE
HAIL 2 MILES SOUTH OF CHESTER.
HAZARDS IN THE WARNING INCLUDE...
HAIL UP TO THE SIZE OF GOLF BALLS...
WIND GUSTS TO 60 MPH...
* LOCATIONS IN THE WARNING INCLUDE CHESTER...CLEO SPRINGS...
ORIENTA...ORION AND WAYNOKA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH NO ADVANCE WARNING.
MOVE IMMEDIATELY TO A STORM SHELTER... BASEMENT OR STURDY BUILDING IF
A TORNADO IS SIGHTED.
&&
LAT...LON 3652 9853 3647 9852 3647 9841 3638 9841
3617 9857 3618 9876 3622 9894 3628 9905
3660 9897
TIME...MOT...LOC 0103Z 220DEG 18KT 3627 9885
$$
BURKE324
WWUS54 KOUN 090115
SVSOUN
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
815 PM CDT FRI APR 8 2011
OKC153-090125-
/O.CAN.KOUN.SV.W.0013.000000T0000Z-110409T0200Z/
WOODWARD OK-
815 PM CDT FRI APR 8 2011
...THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED FOR EASTERN
WOODWARD COUNTY...
LAT...LON 3652 9853 3647 9852 3647 9841 3638 9841
3621 9860 3620 9876 3625 9888 3634 9888
3656 9883
TIME...MOT...LOC 0115Z 220DEG 18KT 3632 9880
$$
OKC093-151-090200-
/O.CON.KOUN.SV.W.0013.000000T0000Z-110409T0200Z/
WOODS OK-MAJOR OK-
815 PM CDT FRI APR 8 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM CDT
FOR WESTERN MAJOR AND SOUTHEASTERN WOODS COUNTIES...
AT 815 PM CDT...NATIONAL WEATHER SERVICE RADAR DETECTED A SEVERE
THUNDERSTORM 6 MILES NORTH OF ORION...MOVING NORTHEAST AT 20 MPH.
HAZARDS IN THE WARNING INCLUDE...
HAIL UP TO THE SIZE OF QUARTERS...
WIND GUSTS TO 60 MPH...
* LOCATIONS IN THE WARNING INCLUDE CLEO SPRINGS...ORIENTA AND ORION.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH NO ADVANCE WARNING.
MOVE IMMEDIATELY TO A STORM SHELTER... BASEMENT OR STURDY BUILDING IF
A TORNADO IS SIGHTED.
&&
LAT...LON 3652 9853 3647 9852 3647 9841 3638 9841
3621 9860 3620 9876 3625 9888 3634 9888
3656 9883
TIME...MOT...LOC 0115Z 220DEG 18KT 3632 9880
$$
BURKE004
WWUS54 KOUN 090151
SVSOUN
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
851 PM CDT FRI APR 8 2011
OKC093-151-090201-
/O.EXP.KOUN.SV.W.0013.000000T0000Z-110409T0200Z/
WOODS OK-MAJOR OK-
851 PM CDT FRI APR 8 2011
...THE SEVERE THUNDERSTORM WARNING FOR WESTERN MAJOR AND SOUTHEASTERN
WOODS COUNTIES WILL EXPIRE AT 900 PM CDT...
THE STORM HAS WEAKENED... BUT SMALL HAIL AND GUSTY WINDS MAY STILL
OCCUR.
LAT...LON 3652 9853 3647 9852 3647 9841 3638 9841
3621 9860 3620 9876 3625 9888 3634 9888
3656 9883
TIME...MOT...LOC 0151Z 220DEG 18KT 3646 9866
$$The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 8, 7:12 PM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Garfield, Grant, Major | 78 min |
| Apr 8, 7:32 PM CDT | Special Weather Statement | OUN | Major | 28 min |
| Apr 8, 7:56 PM CDT | Severe Thunderstorm Warning | OUN | Grant, Kay | 34 min |
| Apr 8, 8:33 PM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Grant | 57 min |
| Apr 8, 9:09 PM CDT | Tornado Warning | OUN | Grant | 36 min |
| Apr 8, 9:42 PM CDT | Severe Thunderstorm Warning | OUN | Grant, Kay | 48 min |
| Apr 8, 10:25 PM CDT | Severe Thunderstorm Warning | OUN | Kay | 65 min |
| Apr 8, 11:14 PM CDT | Tornado Warning | OUN | Kay | 46 min |
| Apr 8, 11:31 PM CDT | Severe Thunderstorm Warning | OUN | Kay | 26 min |
| Apr 9, 5:24 AM CDT | Red Flag Warning | OUN | Beckham, Custer, Dewey, Ellis, Greer, Harmon and 8 more | 15 hr |
| Apr 9, 3:03 PM CDT | Wind Advisory | OUN | Alfalfa, Beckham, Blaine, Caddo, Canadian, Cleveland and 27 more | 29 hr |
| Apr 9, 3:18 PM CDT | Red Flag Warning | OUN | Alfalfa, Beckham, Blaine, Caddo, Canadian, Carter and 36 more | 30 hr |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2011Every severe thunderstorm warning in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.