Alert archive / Oklahoma / Tornado Warnings in 1990

Tornado Warning 4, NWS Tulsa, OK

May 3, 1990Sequoyah County, Oklahoma

NWS Tulsa, OK issued this tornado warning at May 3, 1990, 5:30 PM CDT for Sequoyah County, Oklahoma. It was in force for 22 min.

The area

The counties it named.

The facts

Issued
May 3, 1990, 5:30 PM CDT (22:30 UTC)
Expired
May 3, 1990, 5:52 PM CDT
In force
22 min
Issued by
NWS Tulsa, OK
Area
Whole counties

County Sequoyah 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

Springfield, MO (KUMN), launched 12:00Z, 10.5 hours before the alert went out and 178 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, Springfield, MO at 12:00Z on 1990-05-03Temperature 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, Springfield, MO at 12:00Z on 1990-05-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 397 square meters per square second.1939587897Sfc1 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
707 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
397 m²/s²
0-3 km storm-relative helicity
341 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 KFSM 032231
TORFSM
OKC135-032330-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE FORT SMITH AR
530 PM CDT THU MAY 3 1990
 
THE NATIONAL WEATHER SERVICE IN FORT SMITH HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  630 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHEAST OKLAHOMA
 
   ...NORTHERN SEQUOYAH COUNTY
 
RADAR AND SPOTTERS INDICATED A POSSIBLE TORNADO 5 MILES NORTHEAST OF
VIAN OKLAHOMA AT 530 PM. THE STORM IS MOVING NORTHEAST AT 30 MPH.
 
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 CLOSET ON THE LOWEST FLOO3R.  USE BLANKETS...PILLOWS...
OR CUSHIONS TO COVER YOUR BODY.  AVOID WINDOWS.

The office that day

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

IssuedProductOfficeCountiesLasted
May 2, 7:23 PM CDTFlash Flood WarningTSACreek, Okfuskee, Okmulgee5 hr
May 2, 7:58 PM CDTFlash Flood WarningTSALeFlore4 hr
May 2, 11:19 PM CDTFlash Flood WarningTSASequoyah4 hr
May 2, 11:50 PM CDTSevere Thunderstorm WarningTSALeFlore55 min
May 3, 12:17 AM CDTFlash Flood WarningTSALeFlore3 hr
May 3, 3:12 AM CDTFlash Flood WarningTSALeFlore, Sequoyah4 hr

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.