Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 2, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Feb 27, 2011, 10:47 PM CST for Adair County, Cherokee County, Oklahoma. It was in force for 28 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, 10:47 PM CST (04:47 UTC)
- Expired
- Feb 27, 2011, 11:15 PM CST
- In force
- 28 min
- Issued by
- NWS Tulsa, OK
- Area
- Storm-based polygon
Counties Adair County, OK, Cherokee County, OK
The radar
The Western Arkansas radar (KSRX), 61 km from the middle of the area, began a volume at 04:50 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
Springfield, MO (KSGF), launched 00:00Z, 4.8 hours before the alert went out and 145 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
- 626 J/kg
- Mixed-layer CIN
- -80 J/kg
- Mixed-layer LCL
- 1011 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 369 m²/s²
- 0-3 km storm-relative helicity
- 472 m²/s²
- Significant tornado parameter
- 1.5
- Supercell composite
- 7.4
The text
As transmitted, in the capitals the NWS used until 2016.
100 WUUS54 KTSA 280447 SVRTSA OKC001-021-280515- /O.NEW.KTSA.SV.W.0002.110228T0447Z-110228T0515Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 1047 PM CST SUN FEB 27 2011 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN CHEROKEE COUNTY IN EAST CENTRAL OKLAHOMA SOUTHERN ADAIR COUNTY IN NORTHEAST OKLAHOMA * UNTIL 1115 PM CST * AT 1044 PM CST...A SEVERE THUNDERSTORM WAS LOCATED 5 MILES NORTHWEST OF BUNCH...MOVING NORTHEAST AT 60 MPH. STORM HAZARDS INCLUDE... QUARTER SIZE HAIL... WIND GUSTS TO 60 MPH... * SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...BARON... BUNCH...MARIETTA AND STILWELL. 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. && LAT...LON 3574 9449 3564 9481 3581 9491 3600 9453 TIME...MOT...LOC 0447Z 244DEG 50KT 3577 9475 $$
2 follow-up statements
203 WWUS54 KTSA 280458 SVSTSA SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TULSA OK 1058 PM CST SUN FEB 27 2011 OKC021-280508- /O.CAN.KTSA.SV.W.0002.000000T0000Z-110228T0515Z/ CHEROKEE OK- 1058 PM CST SUN FEB 27 2011 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CHEROKEE COUNTY IS CANCELLED... LAT...LON 3564 9480 3580 9480 3600 9453 3574 9449 TIME...MOT...LOC 0458Z 244DEG 50KT 3584 9458 $$ OKC001-280515- /O.CON.KTSA.SV.W.0002.000000T0000Z-110228T0515Z/ ADAIR OK- 1058 PM CST SUN FEB 27 2011 ...SEVERE THUNDERSTORM WARNING CONTINUES UNTIL 1115 PM CST FOR SOUTHERN ADAIR COUNTY... AT 1057 PM CST...A SEVERE THUNDERSTORM WAS LOCATED NEAR STILWELL... MOVING NORTHEAST AT 55 MPH. STORM HAZARDS INCLUDE... QUARTER SIZE HAIL... WIND GUSTS TO 60 MPH... THE WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE INDICATED COUNTY. 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. && LAT...LON 3564 9480 3580 9480 3600 9453 3574 9449 TIME...MOT...LOC 0458Z 244DEG 50KT 3584 9458 $$
411 WWUS54 KTSA 280511 SVSTSA SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TULSA OK 1111 PM CST SUN FEB 27 2011 OKC001-280521- /O.EXP.KTSA.SV.W.0002.000000T0000Z-110228T0515Z/ ADAIR OK- 1111 PM CST SUN FEB 27 2011 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN ADAIR COUNTY EXPIRES AT 1115 PM CST... THE THUNDERSTORM HAS WEAKENED BELOW SEVERE LIMITS...THEREFORE THE SEVERE THUNDERSTORM WARNING WILL BE ALLOWED TO EXPIRE. GUSTY WINDS...SMALL HAIL AND HEAVY RAIN WILL STILL BE POSSIBLE WITH THIS STORM AS IT TRACKS ACROSS THE SOUTHEAST PORTION OF THE COUNTY. A TORNADO WATCH REMAINS IN EFFECT UNTIL 4AM. LAT...LON 3564 9480 3580 9480 3600 9453 3574 9449 TIME...MOT...LOC 0511Z 244DEG 50KT 3592 9438 $$
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, 10:48 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 |
| Feb 27, 11:38 PM CST | Severe Thunderstorm Warning | TSA | LeFlore, Pushmataha | 52 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.