Alert archive / Oklahoma / Tornado Warnings in 2011

Tornado Warning 1, NWS Tulsa, OK

February 27, 2011Osage County, Oklahoma

NWS Tulsa, OK issued this tornado warning at Feb 27, 2011, 6:07 PM CST for Osage County, Oklahoma. It was in force for 23 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, 6:07 PM CST (00:07 UTC)
Expired
Feb 27, 2011, 6:30 PM CST
In force
23 min
Issued by
NWS Tulsa, OK
Area
Storm-based polygon

County Osage County, OK

The radar

The Wichita radar (KICT), 106 km from the middle of the area, began a volume at 00:10 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.

IssuedProductOfficeLasted
Feb 27, 2:46 PM CSTTornado WatchSPC8 hr

The nearest sounding before it

Lamont, OK (KLMN), launched 00:00Z, 0.1 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.

Skew-T log-pSkew-T log-p diagram, Lamont, OK at 00:00Z on 2011-02-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 914 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lamont, OK at 00:00Z on 2011-02-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 190 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
914 J/kg
Mixed-layer CIN
-58 J/kg
Mixed-layer LCL
1738 m above ground
0-6 km bulk shear
83 kt
0-1 km storm-relative helicity
190 m²/s²
0-3 km storm-relative helicity
255 m²/s²
Significant tornado parameter
0.3
Supercell composite
3.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

562 
WFUS54 KTSA 280007
TORTSA
OKC113-280030-
/O.NEW.KTSA.TO.W.0001.110228T0007Z-110228T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TULSA OK
607 PM CST SUN FEB 27 2011

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN OSAGE COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 630 PM CST

* AT 604 PM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A   
TORNADO WAS LOCATED 12 MILES WEST OF GRAINOLA...MOVING EAST-NORTEAST
AT 45 MPH.

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  GRAINOLA.

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 3700 9650 3700 9638 3698 9637 3690 9675
      3691 9676 3696 9676 3699 9675 3700 9674
      3700 9651
TIME...MOT...LOC 0007Z 255DEG 32KT 3695 9684

$$
3 follow-up statements
391 
WWUS54 KTSA 280015
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
615 PM CST SUN FEB 27 2011

OKC113-280030-
/O.CON.KTSA.TO.W.0001.000000T0000Z-110228T0030Z/
OSAGE OK-
615 PM CST SUN FEB 27 2011

...TORNADO WARNING CONTINUES UNTIL 630 PM CST FOR NORTHERN OSAGE
COUNTY...

AT 610 PM CST...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING A TORNADO LOCATED 9 MILES WEST OF 
GRAINOLA...MOVING EAST-NORTHEST AT 40 MPH.

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...GRAINOLA.

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 3700 9650 3700 9638 3698 9637 3690 9675
      3691 9676 3696 9676 3699 9675 3700 9674
      3700 9651
TIME...MOT...LOC 0015Z 255DEG 32KT 3697 9675

$$
505 
WWUS54 KTSA 280019
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
619 PM CST SUN FEB 27 2011

OKC113-280030-
/O.CON.KTSA.TO.W.0001.000000T0000Z-110228T0030Z/
OSAGE OK-
619 PM CST SUN FEB 27 2011

...TORNADO WARNING CONTINUES UNTIL 630 PM CST FOR NORTHERN OSAGE
COUNTY...

AT 615 PM CST...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING A TORNADO LOCATED 6 MILES 
NORTHWEST OF GRAINOLA...MOVING EAST-NORTHEAST AT 45 MPH.

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...GRAINOLA.

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 3700 9650 3700 9638 3698 9637 3690 9675
      3691 9676 3696 9676 3699 9675 3700 9674
      3700 9651
TIME...MOT...LOC 0019Z 255DEG 32KT 3698 9671

$$
244 
WWUS54 KTSA 280021
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
621 PM CST SUN FEB 27 2011

OKC113-280030-
/O.CON.KTSA.TO.W.0001.000000T0000Z-110228T0030Z/
OSAGE OK-
621 PM CST SUN FEB 27 2011

...TORNADO WARNING CONTINUES UNTIL 630 PM CST FOR NORTHERN OSAGE
COUNTY...

AT 619 PM CST...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING A TORNADO LOCATED NEAR 
GRAINOLA...MOVING EAST-NORTHEAST AT 45 MPH.

MEDIA CHASERS REPORT A WELL DEVELOPED FUNNEL CLOUD AT THIS TIME.

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...GRAINOLA.

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 3700 9650 3700 9638 3698 9637 3690 9675
      3691 9676 3696 9676 3699 9675 3700 9674
      3700 9651
TIME...MOT...LOC 0021Z 255DEG 32KT 3698 9669

$$

The office that day

Everything else NWS Tulsa, OK issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 27, 6:23 PM CSTTornado WarningTSAOsage12 min
Feb 27, 8:03 PM CSTSpecial Weather StatementTSAOsage42 min
Feb 27, 9:00 PM CSTSpecial Weather StatementTSANowata30 min
Feb 27, 9:48 PM CSTSpecial Weather StatementTSAHaskell, Latimer, Pittsburg27 min
Feb 27, 9:54 PM CSTSpecial Weather StatementTSAMuskogee36 min
Feb 27, 9:56 PM CSTSpecial Weather StatementTSAAdair34 min
Feb 27, 10:23 PM CSTSpecial Weather StatementTSACherokee37 min
Feb 27, 10:26 PM CSTSpecial Weather StatementTSAHaskell34 min
Feb 27, 10:35 PM CSTSpecial Weather StatementTSAPushmataha25 min
Feb 27, 10:39 PM CSTSevere Thunderstorm WarningTSAAdair51 min
Feb 27, 10:47 PM CSTSevere Thunderstorm WarningTSAAdair, Cherokee28 min
Feb 27, 10:48 PM CSTSevere Thunderstorm WarningTSAHaskell, Latimer, LeFlore, Sequoyah42 min
Feb 27, 10:50 PM CSTSevere Thunderstorm WarningTSAHaskell, Muskogee, Sequoyah40 min
Feb 27, 10:53 PM CSTSevere Thunderstorm WarningTSAChoctaw, Pushmataha52 min
Feb 27, 11:00 PM CSTSevere Thunderstorm WarningTSAAdair30 min
Feb 27, 11:27 PM CSTSevere Thunderstorm WarningTSALeFlore, Sequoyah48 min
Feb 27, 11:38 PM CSTSevere Thunderstorm WarningTSALeFlore, Pushmataha52 min

Nearby

Tornado Warnings in Oklahoma, 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.