Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 9, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Feb 27, 2011, 11:38 PM CST for LeFlore County, Pushmataha County, Oklahoma. It was in force for 52 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
- Feb 27, 2011, 11:38 PM CST (05:38 UTC)
- Expired
- Feb 28, 2011, 12:30 AM CST
- In force
- 52 min
- Issued by
- NWS Tulsa, OK
- Area
- Storm-based polygon
Counties LeFlore County, OK, Pushmataha County, OK
The radar
The Western Arkansas radar (KSRX), 91 km from the middle of the area, began a volume at 05:41 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 |
|---|---|---|---|
| Feb 27, 10:04 PM CST | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 5.6 hours before the alert went out and 242 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
- 1159 J/kg
- Mixed-layer CIN
- -67 J/kg
- Mixed-layer LCL
- 1479 m above ground
- 0-6 km bulk shear
- 90 kt
- 0-1 km storm-relative helicity
- 290 m²/s²
- 0-3 km storm-relative helicity
- 409 m²/s²
- Significant tornado parameter
- 1.4
- Supercell composite
- 7.5
The text
As transmitted, in the capitals the NWS used until 2016.
349
WUUS54 KTSA 280538
SVRTSA
OKC079-127-280630-
/O.NEW.KTSA.SV.W.0009.110228T0538Z-110228T0630Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1138 PM CST SUN FEB 27 2011
THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHERN LE FLORE COUNTY IN SOUTHEAST OKLAHOMA
NORTHEASTERN PUSHMATAHA COUNTY IN SOUTHEAST OKLAHOMA
* UNTIL 1230 AM CST
* AT 1134 PM CST...A SEVERE THUNDERSTORM WAS LOCATED 20 MILES
SOUTHWEST OF MUSE...MOVING NORTHEAST AT 55 MPH.
STORM HAZARDS INCLUDE...
QUARTER SIZE HAIL...
DAMAGING WIND GUSTS TO 70 MPH...
* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...BIG
CEDAR AND MUSE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A TORNADO WATCH IS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP SUDDENLY FROM SEVERE THUNDERSTORMS. IF YOU ARE NEAR THE PATH
OF THIS STORM...BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS.
TAKE COVER ON THE LOWEST FLOOR IN AN INTERIOR ROOM AND STAY AWAY FROM
WINDOWS.
PEOPLE OUTSIDE SHOULD MOVE TO A SAFE SHELTER...PREFERABLY INSIDE A
STRONG BUILDING. STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.
&&
LAT...LON 3456 9514 3489 9445 3464 9445 3450 9479
3451 9504 3441 9504
TIME...MOT...LOC 0538Z 242DEG 48KT 3453 9499
$$2 follow-up statements
199
WWUS54 KTSA 280556
SVSTSA
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1156 PM CST SUN FEB 27 2011
OKC127-280606-
/O.CAN.KTSA.SV.W.0009.000000T0000Z-110228T0630Z/
PUSHMATAHA OK-
1156 PM CST SUN FEB 27 2011
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN PUSHMATAHA COUNTY
IS CANCELLED...
LAT...LON 3450 9483 3460 9489 3481 9445 3464 9445
3450 9479
TIME...MOT...LOC 0556Z 242DEG 48KT 3456 9474
$$
OKC079-280630-
/O.CON.KTSA.SV.W.0009.000000T0000Z-110228T0630Z/
LE FLORE OK-
1156 PM CST SUN FEB 27 2011
...SEVERE THUNDERSTORM WARNING CONTINUES UNTIL 1230 AM CST FOR
SOUTHEASTERN LE FLORE COUNTY...
AT 1154 PM CST...A SEVERE THUNDERSTORM WAS LOCATED 10 MILES SOUTHWEST
OF BIG CEDAR...MOVING NORTHEAST AT 55 MPH.
STORM HAZARDS INCLUDE...
QUARTER SIZE HAIL...
DAMAGING WIND GUSTS TO 70 MPH...
SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...BIG CEDAR.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A TORNADO WATCH IS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP SUDDENLY FROM SEVERE THUNDERSTORMS. IF YOU ARE NEAR THE PATH
OF THIS STORM...YOU SHOULD BE ALERT FOR RAPIDLY CHANGING WEATHER
CONDITIONS AND BE READY TO ACT QUICKLY.
PEOPLE OUTSIDE SHOULD MOVE TO A SAFE SHELTER...PREFERABLY INSIDE A
STRONG BUILDING. STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.
&&
LAT...LON 3450 9483 3460 9489 3481 9445 3464 9445
3450 9479
TIME...MOT...LOC 0556Z 242DEG 48KT 3456 9474
$$527
WWUS54 KTSA 280625
SVSTSA
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1225 AM CST MON FEB 28 2011
OKC079-280635-
/O.EXP.KTSA.SV.W.0009.000000T0000Z-110228T0630Z/
LE FLORE OK-
1225 AM CST MON FEB 28 2011
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN LE FLORE COUNTY
EXPIRES AT 1230 AM CST...
THE THUNDERSTORM HAS MOVED OUT OF THE WARNED AREA...THEREFORE THE
SEVERE THUNDERSTORM WARNING WILL BE ALLOWED TO EXPIRE.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 4 AM.
LAT...LON 3450 9483 3460 9489 3481 9445 3464 9445
3450 9479
TIME...MOT...LOC 0625Z 242DEG 48KT 3473 9432
$$The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 27, 6:07 PM CST | Tornado Warning | TSA | Osage | 23 min |
| Feb 27, 6:23 PM CST | Tornado Warning | TSA | Osage | 12 min |
| Feb 27, 8:03 PM CST | Special Weather Statement | TSA | Osage | 42 min |
| Feb 27, 9:00 PM CST | Special Weather Statement | TSA | Nowata | 30 min |
| Feb 27, 9:48 PM CST | Special Weather Statement | TSA | Haskell, Latimer, Pittsburg | 27 min |
| Feb 27, 9:54 PM CST | Special Weather Statement | TSA | Muskogee | 36 min |
| Feb 27, 9:56 PM CST | Special Weather Statement | TSA | Adair | 34 min |
| Feb 27, 10:23 PM CST | Special Weather Statement | TSA | Cherokee | 37 min |
| Feb 27, 10:26 PM CST | Special Weather Statement | TSA | Haskell | 34 min |
| Feb 27, 10:35 PM CST | Special Weather Statement | TSA | Pushmataha | 25 min |
| Feb 27, 10:39 PM CST | Severe Thunderstorm Warning | TSA | Adair | 51 min |
| Feb 27, 10:47 PM CST | Severe Thunderstorm Warning | TSA | Adair, Cherokee | 28 min |
| Feb 27, 10:48 PM CST | Severe Thunderstorm Warning | TSA | Haskell, Latimer, LeFlore, Sequoyah | 42 min |
| Feb 27, 10:50 PM CST | Severe Thunderstorm Warning | TSA | Haskell, Muskogee, Sequoyah | 40 min |
| Feb 27, 10:53 PM CST | Severe Thunderstorm Warning | TSA | Choctaw, Pushmataha | 52 min |
| Feb 27, 11:00 PM CST | Severe Thunderstorm Warning | TSA | Adair | 30 min |
| Feb 27, 11:27 PM CST | Severe Thunderstorm Warning | TSA | LeFlore, Sequoyah | 48 min |
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.