Alert archive / Oklahoma / Tornado Warnings in 1992

Tornado Warning 21, NWS Norman, OK

May 11, 1992Atoka County, Oklahoma

NWS Norman, OK issued this tornado warning at May 11, 1992, 4:19 PM CDT for Atoka County, Oklahoma. It was in force for 36 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
May 11, 1992, 4:19 PM CDT (21:19 UTC)
Expired
May 11, 1992, 4:55 PM CDT
In force
36 min
Issued by
NWS Norman, OK
Area
Whole counties

County Atoka County, OK

The radar

The Norman radar (KTLX), 155 km from the middle of the area, began a volume at 21:18 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.

What was reported inside it

TimeReportWhereRemark
May 11, 4:20 PM CDTTornado F0Atoka, OK
May 11, 5:00 PM CDTHail 1.5Atoka, OK

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 9.3 hours before the alert went out and 156 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, Norman, OK at 12:00Z on 1992-05-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 12:00Z on 1992-05-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -129 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
736 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
-129 m²/s²
0-3 km storm-relative helicity
-53 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KOKC 112120
TOROKC
OKC005-112155-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
419 PM CDT MON MAY 11 1992
 
THE NATIONAL WEATHER SERVICE IN OKLAHOMA CITY HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  455 PM CDT
FOR THE FOLLOWING OKLAHOMA LOCATIONS...
 
IN SOUTHEAST OKLAHOMA
 
   ...NORTHERN ATOKA COUNTY
 
AT 418 PM CDT RADAR INDICATED A TORNADO 7 MILES WEST-SOUTHWEST OF
WARDVILLE MOVING TOWARD THE EAST-NORTHEAST AT 20 MPH. PERSONS IN
WARDVILLE AND CHOCKIE ARE NEAR THE PROJECTED PATH OF THIS TORNADO AND
SHOULD TAKE COVER NOW.
 
THIS IS A DANGEROUS STORM SITUATION.  ACT QUICKLY.  IF YOU ARE
IN THE PATH OF THIS TORNADO MOVE TO A SHELTER BELOW GROUND IF
AVAILABLE.  OTHERWISE...GO TO A SMALL INTERIOR ROOM ON THE LOWEST
FLOOR POSSIBLE.  AVOID WINDOWS.  ABANDON CARS AND MOBILE HOMES
FOR A REINFORCED BUILDING OR GET INTO A DITCH OR CULVERT.

The office that day

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

IssuedProductOfficeCountiesLasted
May 10, 7:12 PM CDTSevere Thunderstorm WarningOUNKay, Noble63 min
May 10, 7:56 PM CDTSevere Thunderstorm WarningOUNCanadian, Grady49 min
May 10, 8:36 PM CDTSevere Thunderstorm WarningOUNOklahoma54 min
May 10, 8:42 PM CDTSevere Thunderstorm WarningOUNGarfield48 min
May 10, 9:24 PM CDTSevere Thunderstorm WarningOUNLogan, Oklahoma66 min
May 10, 9:30 PM CDTSevere Thunderstorm WarningOUNKay, Noble60 min
May 10, 10:18 PM CDTSevere Thunderstorm WarningOUNPottawatomie57 min
May 11, 1:15 PM CDTSevere Thunderstorm WarningOUNMcClain, Pontotoc, Pottawatomie, Seminole45 min
May 11, 1:22 PM CDTSevere Thunderstorm WarningOUNMurray53 min
May 11, 1:29 PM CDTTornado WarningOUNGarvin, Pontotoc31 min
May 11, 1:39 PM CDTSevere Thunderstorm WarningOUNJefferson51 min
May 11, 1:45 PM CDTSevere Thunderstorm WarningOUNLogan, Payne60 min
May 11, 1:45 PM CDTSevere Thunderstorm WarningOUNJefferson60 min
May 11, 1:55 PM CDTTornado WarningOUNPontotoc50 min
May 11, 2:15 PM CDTSevere Thunderstorm WarningOUNHughes60 min
May 11, 2:21 PM CDTSevere Thunderstorm WarningOUNLove69 min
May 11, 2:37 PM CDTSevere Thunderstorm WarningOUNJohnston, Murray68 min
May 11, 2:45 PM CDTTornado WarningOUNCoal, Pontotoc45 min
May 11, 3:15 PM CDTSevere Thunderstorm WarningOUNHughes45 min
May 11, 3:26 PM CDTSevere Thunderstorm WarningOUNLove, Marshall64 min
May 11, 3:45 PM CDTTornado WarningOUNCoal45 min
May 11, 4:27 PM CDTTornado WarningOUNBryan48 min
May 11, 4:30 PM CDTSevere Thunderstorm WarningOUNCoal60 min
May 11, 4:37 PM CDTSevere Thunderstorm WarningOUNGrant, Kay68 min
May 11, 4:50 PM CDTSevere Thunderstorm WarningOUNAtoka55 min
May 11, 4:58 PM CDTTornado WarningOUNKay47 min
May 11, 5:03 PM CDTTornado WarningOUNBryan42 min
May 11, 5:06 PM CDTSevere Thunderstorm WarningOUNMarshall54 min
May 11, 5:21 PM CDTSevere Thunderstorm WarningOUNPushmataha69 min
May 11, 5:44 PM CDTSevere Thunderstorm WarningOUNChoctaw61 min
May 11, 5:45 PM CDTSevere Thunderstorm WarningOUNKay30 min
May 11, 5:58 PM CDTSevere Thunderstorm WarningOUNBryan47 min
May 11, 6:28 PM CDTSevere Thunderstorm WarningOUNPushmataha47 min

Nearby

Tornado Warnings in Oklahoma, 1992Every tornado warning in 1992Tornadoes in 1992

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.