Alert archive / Oklahoma / Tornado Warnings in 2011
Tornado Warning 4, NWS Shreveport, LA
NWS Shreveport, LA issued this tornado warning at Mar 8, 2011, 5:40 PM CST for McCurtain County, Oklahoma; Red River County, Texas. It was in force for 50 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
- Mar 8, 2011, 5:40 PM CST (23:40 UTC)
- Expired
- Mar 8, 2011, 6:30 PM CST
- In force
- 50 min
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
Counties McCurtain County, OK, Red River County, TX
The radar
The Western Arkansas radar (KSRX), 168 km from the middle of the area, began a volume at 23:42 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 |
|---|---|---|---|
| Mar 8, 1:34 PM CST | Tornado Watch | SPC | 9 hr |
The nearest sounding before it
Shreveport, LA (KSHV), launched 12:00Z, 11.7 hours before the alert went out and 170 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
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 448 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 608 m²/s²
- 0-3 km storm-relative helicity
- 684 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
The text
As transmitted, in the capitals the NWS used until 2016.
675
WFUS54 KSHV 082340
TORSHV
OKC089-TXC387-090030-
/O.NEW.KSHV.TO.W.0004.110308T2340Z-110309T0030Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
540 PM CST TUE MAR 8 2011
THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A
* TORNADO WARNING FOR...
NORTH CENTRAL RED RIVER COUNTY IN NORTHEAST TEXAS...
SOUTHEASTERN MCCURTAIN COUNTY IN SOUTHEAST OKLAHOMA...
* UNTIL 630 PM CST
* AT 537 PM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS ARE
TRACKING A TORNADO NEAR BRYARLY...OR 16 MILES NORTHEAST OF
CLARKSVILLE...MOVING EAST AT 30 MPH.
* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
HARRIS...GOODLAKE...HAWORTH...TOM...BOKHOMA...MOON AND AMERICA...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW
SPOT AND COVER YOUR HEAD WITH YOUR HANDS.
HEAVY RAINFALL MAY OBSCURE THIS TORNADO. TAKE COVER NOW! IF YOU WAIT
TO SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A SAFE PLACE.
&&
LAT...LON 3392 9453 3369 9449 3367 9448 3375 9499
3385 9498
TIME...MOT...LOC 2340Z 258DEG 44KT 3374 9477
$$
VII1 follow-up statement
229
WWUS54 KSHV 090011
SVSSHV
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
611 PM CST TUE MAR 8 2011
TXC387-090019-
/O.CAN.KSHV.TO.W.0004.000000T0000Z-110309T0030Z/
RED RIVER TX-
611 PM CST TUE MAR 8 2011
...THE TORNADO WARNING FOR RED RIVER COUNTY IS CANCELLED...
LAT...LON 3387 9473 3392 9453 3369 9449 3367 9448
3371 9474
TIME...MOT...LOC 0009Z 258DEG 44KT 3381 9435
$$
OKC089-090030-
/O.CON.KSHV.TO.W.0004.000000T0000Z-110309T0030Z/
MCCURTAIN OK-
611 PM CST TUE MAR 8 2011
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 630 PM CST FOR MCCURTAIN
COUNTY...
AT 607 PM CST...A SEVERE THUNDERSTORM...CAPABLE OF PRODUCING A
TORNADO... WAS REPORTED 10 MILES SOUTHEAST OF IDABEL...AND WAS
MOVING EAST AT 50 MPH.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.
IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.
&&
LAT...LON 3387 9473 3392 9453 3369 9449 3367 9448
3371 9474
TIME...MOT...LOC 0009Z 258DEG 44KT 3381 9435
$$
VIIThe office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 8, 4:33 PM CST | Tornado Warning | SHV | Red River | 57 min |
| Mar 8, 5:25 PM CST | Tornado Warning | SHV | Red River | 30 min |
Nearby
Tornado Warnings in Oklahoma, 2011Tornado Warnings in Texas, 2011Every tornado warning in 2011Tornadoes 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.