Alert archive / Oklahoma / Tornado Warnings in 2011
Tornado Warning 108, NWS Tulsa, OK
NWS Tulsa, OK issued this tornado warning at Sep 18, 2011, 5:42 PM CDT for Adair County, Delaware County, Oklahoma; Benton County, Washington County, Arkansas. It was in force for 48 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
- Sep 18, 2011, 5:42 PM CDT (22:42 UTC)
- Expired
- Sep 18, 2011, 6:30 PM CDT
- In force
- 48 min
- Issued by
- NWS Tulsa, OK
- Area
- Storm-based polygon
Counties Benton County, AR, Washington County, AR, Adair County, OK, Delaware County, OK
The radar
The Western Arkansas radar (KSRX), 104 km from the middle of the area, began a volume at 22:42 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 |
|---|---|---|---|
| Sep 18, 3:30 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Springfield, MO (KSGF), launched 12:00Z, 10.7 hours before the alert went out and 88 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
- 1001 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 228 m²/s²
- 0-3 km storm-relative helicity
- 350 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
343 WFUS54 KTSA 182242 TORTSA ARC007-143-OKC001-041-182330- /O.NEW.KTSA.TO.W.0108.110918T2242Z-110918T2330Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE TULSA OK 542 PM CDT SUN SEP 18 2011 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * TORNADO WARNING FOR... NORTHERN ADAIR COUNTY IN NORTHEAST OKLAHOMA SOUTHEASTERN DELAWARE COUNTY IN NORTHEAST OKLAHOMA SOUTHERN BENTON COUNTY IN NORTHWEST ARKANSAS NORTHWESTERN WASHINGTON COUNTY IN NORTHWEST ARKANSAS * UNTIL 630 PM CDT * AT 537 PM CDT...A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING A TORNADO WAS LOCATED ALONG A LINE EXTENDING FROM 2 MILES NORTH OF SILOAM SPRINGS TO 5 MILES WEST OF WEST SILOAM SPRINGS...MOVING EAST AT 20 MPH. * SOME LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE... SPRINGTOWN...WATTS...HIGHFILL...CAVE SPRINGS...TONTITOWN... SPRINGDALE AND LOWELL. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE NEAR THE PATH OF THIS STORM...TAKE COVER NOW! IF NO UNDERGROUND SHELTER IS AVAILABLE MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR. MOBILE HOMES AND VEHICLES SHOULD BE ABANDONED FOR MORE SUBSTANTIAL SHELTER. AVOID WINDOWS! && LAT...LON 3631 9397 3602 9432 3616 9475 3630 9450 TIME...MOT...LOC 2242Z 286DEG 19KT 3621 9450 3615 9463 $$
2 follow-up statements
748
WWUS54 KTSA 182259
SVSTSA
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
559 PM CDT SUN SEP 18 2011
OKC001-041-182309-
/O.CAN.KTSA.TO.W.0108.000000T0000Z-110918T2330Z/
DELAWARE OK-ADAIR OK-
559 PM CDT SUN SEP 18 2011
...THE TORNADO WARNING FOR NORTHERN ADAIR AND SOUTHEASTERN DELAWARE
COUNTIES IS CANCELLED...
LAT...LON 3602 9432 3611 9454 3613 9456 3630 9450
3631 9398 3632 9396
TIME...MOT...LOC 2259Z 286DEG 19KT 3618 9439 3612 9451
$$
ARC007-143-182330-
/O.CON.KTSA.TO.W.0108.000000T0000Z-110918T2330Z/
BENTON AR-WASHINGTON AR-
559 PM CDT SUN SEP 18 2011
...TORNADO WARNING REMAINS IN EFFECT UNTIL 630 PM CDT FOR
NORTHWESTERN WASHINGTON AND SOUTHERN BENTON COUNTIES...
AT 556 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE SEVERE
THUNDERSTORMS CAPABLE OF PRODUCING A TORNADO. THE CIRCULATIONS
WERE LOCATED NEAR GALLITIN TO LAKE FRANCIS...MOVING EAST AT 20 MPH.
SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
HIGHFILL...ROCKY COMFORT...HEALING SPRINGS...WEDINGTON...HARMON...
CAVE SPRINGS...ELM SPRINGS...SAVOY...TONTITOWN...WHEELER...OAK
GROVE...SPRINGDALE...MONTE NE AND LOWELL.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU ARE NEAR THE PATH OF THIS STORM...TAKE COVER NOW! IF NO
UNDERGROUND SHELTER IS AVAILABLE MOVE TO AN INTERIOR ROOM ON THE
LOWEST FLOOR. MOBILE HOMES AND VEHICLES SHOULD BE ABANDONED FOR MORE
SUBSTANTIAL SHELTER. AVOID WINDOWS!
&&
LAT...LON 3602 9432 3611 9454 3613 9456 3630 9450
3631 9398 3632 9396
TIME...MOT...LOC 2259Z 286DEG 19KT 3618 9439 3612 9451
$$041
WWUS54 KTSA 182330
SVSTSA
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
630 PM CDT SUN SEP 18 2011
ARC007-143-182340-
/O.EXP.KTSA.TO.W.0108.000000T0000Z-110918T2330Z/
BENTON AR-WASHINGTON AR-
630 PM CDT SUN SEP 18 2011
...THE TORNADO WARNING FOR NORTHWESTERN WASHINGTON AND SOUTHERN
BENTON COUNTIES EXPIRES AT 630 PM CDT...
THE THUNDERSTORM HAS WEAKENED BELOW SEVERE LIMITS...THEREFORE THE
TORNADO WARNING WILL BE ALLOWED TO EXPIRE.
GUSTY WINDS...SMALL HAIL AND VERY HEAVY RAIN WILL STILL BE POSSIBLE
WITH THIS STORM.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM.
LAT...LON 3602 9432 3611 9454 3613 9456 3630 9450
3631 9398 3632 9396
TIME...MOT...LOC 2330Z 286DEG 19KT 3613 9419 3607 9431
$$The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 17, 7:19 PM CDT | Severe Thunderstorm Warning | TSA | Osage, Pawnee | 56 min |
| Sep 17, 8:12 PM CDT | Severe Thunderstorm Warning | TSA | Creek, Osage, Pawnee, Tulsa, Washington | 63 min |
| Sep 17, 8:28 PM CDT | Tornado Warning | TSA | Osage | 32 min |
| Sep 17, 9:13 PM CDT | Special Weather Statement | TSA | Rogers, Tulsa, Wagoner | 47 min |
| Sep 17, 9:38 PM CDT | Special Weather Statement | TSA | Okmulgee | 52 min |
| Sep 17, 9:59 PM CDT | Special Weather Statement | TSA | Muskogee, Okmulgee, Rogers, Wagoner | 61 min |
| Sep 17, 10:13 PM CDT | Severe Thunderstorm Warning | TSA | Muskogee, Okmulgee, Tulsa | 21 min |
| Sep 17, 10:52 PM CDT | Special Weather Statement | TSA | Pawnee | 53 min |
| Sep 17, 11:11 PM CDT | Special Weather Statement | TSA | Haskell, McIntosh, Muskogee, Okmulgee, Wagoner | 34 min |
| Sep 18, 12:34 AM CDT | Special Weather Statement | TSA | Haskell, Latimer | 41 min |
| Sep 18, 3:40 PM CDT | Special Weather Statement | TSA | Tulsa | 35 min |
| Sep 18, 4:03 PM CDT | Special Weather Statement | TSA | Delaware | 27 min |
| Sep 18, 4:06 PM CDT | Special Weather Statement | TSA | Haskell | 24 min |
| Sep 18, 4:08 PM CDT | Severe Thunderstorm Warning | TSA | Delaware | 67 min |
| Sep 18, 4:24 PM CDT | Severe Thunderstorm Warning | TSA | Haskell, Latimer, LeFlore, Muskogee, Sequoyah | 66 min |
| Sep 18, 4:28 PM CDT | Severe Thunderstorm Warning | TSA | Cherokee, Muskogee, Okmulgee, Wagoner | 62 min |
| Sep 18, 5:08 PM CDT | Special Weather Statement | TSA | Pushmataha | 52 min |
| Sep 18, 5:25 PM CDT | Severe Thunderstorm Warning | TSA | Cherokee, Muskogee, Sequoyah, Wagoner | 65 min |
| Sep 18, 5:28 PM CDT | Severe Thunderstorm Warning | TSA | LeFlore, Sequoyah | 62 min |
| Sep 18, 5:33 PM CDT | Severe Thunderstorm Warning | TSA | Latimer, Pittsburg, Pushmataha | 57 min |
| Sep 18, 6:37 PM CDT | Special Weather Statement | TSA | Latimer, Pushmataha | 53 min |
| Sep 18, 6:56 PM CDT | Special Weather Statement | TSA | Haskell | 49 min |
| Sep 18, 6:59 PM CDT | Areal Flood Advisory | TSA | Haskell, Latimer, LeFlore, Pittsburg, Pushmataha, Sequoyah | 2 hr |
| Sep 18, 5:14 PM CDT | Special Weather Statement | TSA | Benton | 46 min |
| Sep 18, 6:11 PM CDT | Special Weather Statement | TSA | Sebastian | 49 min |
Nearby
Tornado Warnings in Oklahoma, 2011Tornado Warnings in Arkansas, 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.