Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 9, NWS Tulsa, OK

March 20, 1986LeFlore County, Sequoyah County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Mar 20, 1986, 8:06 PM CST for LeFlore County, Sequoyah County, Oklahoma. It was in force for 69 min.

The area

The counties it named.

The facts

Issued
Mar 20, 1986, 8:06 PM CST (02:06 UTC)
Expired
Mar 20, 1986, 9:15 PM CST
In force
69 min
Issued by
NWS Tulsa, OK
Area
Whole counties

Counties LeFlore County, OK, 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 00:00Z, 2.1 hours before the alert went out and 207 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 00:00Z on 1986-03-21Temperature 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 00:00Z on 1986-03-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 12 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
1625 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
12 m²/s²
0-3 km storm-relative helicity
50 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 210206
SVRFSM
OKC079-135-210315-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE FORT SMITH AR
806 PM CST THU MAR 20 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 915 PM CST FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

OKLAHOMA...LEFLORE AND SEQUOYAH

AT 0045AM  FT SMITH RADAR INDICATED A LINE OF SEVERE
THUNDERSTORMS FROM JUST WEST OF SALLISAW OKLAHOMA TO NEAR
WILBURTON OKLAHOMA MOVING TOWARD THE NORTHEAST AT 50 MPH.

A TORNADO WATCH IS IN EFFECT FOR EASTERN OKLAHOMA AND WESTERN
ARKANSAS UNTIL 5 AM THIS MONDAY MORNING.

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1986Every severe thunderstorm warning in 1986

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.