Alert archive / Oklahoma / Tornado Warnings in 1990

Tornado Warning 39, NWS Norman, OK

May 31, 1990Greer County, Oklahoma

NWS Norman, OK issued this tornado warning at May 31, 1990, 8:41 PM CDT for Greer County, Oklahoma. It was in force for 49 min.

The area

The counties it named.

The facts

Issued
May 31, 1990, 8:41 PM CDT (01:41 UTC)
Expired
May 31, 1990, 9:30 PM CDT
In force
49 min
Issued by
NWS Norman, OK
Area
Whole counties

County Greer County, OK

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 1.7 hours before the alert went out and 197 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, Amarillo Airport, TX at 00:00Z on 1990-06-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 49 joules per kilogram.LCLEL10008507005003002001001 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, Amarillo Airport, TX at 00:00Z on 1990-06-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 9 square meters per square second.193958Sfc1 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
49 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
3540 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
9 m²/s²
0-3 km storm-relative helicity
54 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 010142
TOROKC
OKC055-010230-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
841 PM CDT THU MAY 31 1990
 
THE NATIONAL WEATHER SERVICE IN OKLAHOMA CITY HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  930 PM CDT
FOR THE FOLLOWING OKLAHOMA LOCATIONS...
 
IN SOUTHWEST OKLAHOMA
 
   ...NORTHERN GREER COUNTY
 
AT 841 PM RADAR INDICATED A POSSIBLE TORNADO 8 MILES SOUTHWEST OF
BRINKMAN MOVING NORTHEAST AT 20 MPH. IF LIVE IN BRINKMAN TAKE COVER
NOW.
 
IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS A
BASEMENT.  GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE.
IF NO BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR ROOM
SUCH AS A CLOS[ET ON THE LOWEST FLOOR.  USE BLANKETS...PILLOWS...
OR CUSHIONS TO COVER YOUR BODY.  AVOID WINDOWS.

The office that day

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

IssuedProductOfficeCountiesLasted
May 31, 8:23 PM CDTSevere Thunderstorm WarningOUNBeckham, Greer67 min
May 31, 8:59 PM CDTSevere Thunderstorm WarningOUNHarmon61 min
May 31, 9:10 PM CDTFlash Flood WarningOUNBeckham, Greer, Harmon3 hr
May 31, 9:21 PM CDTTornado WarningOUNHarmon54 min
May 31, 9:26 PM CDTSevere Thunderstorm WarningOUNGreer64 min
May 31, 9:57 PM CDTSevere Thunderstorm WarningOUNJackson63 min
May 31, 10:47 PM CDTFlash Flood WarningOUNGreer, Jackson2 hr
May 31, 11:27 PM CDTSevere Thunderstorm WarningOUNTillman63 min
Jun 1, 8:55 AM CDTSevere Thunderstorm WarningOUNGreer, Jackson, Kiowa65 min

Nearby

Tornado Warnings in Oklahoma, 1990Every tornado warning in 1990Tornadoes in 1990

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.