Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 18, NWS Tulsa, OK

April 4, 1986Sequoyah County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 4, 1986, 12:18 PM CST for Sequoyah County, Oklahoma. It was in force for 57 min.

The area

The counties it named.

The facts

Issued
Apr 4, 1986, 12:18 PM CST (18:18 UTC)
Expired
Apr 4, 1986, 1:15 PM CST
In force
57 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, 6.3 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 1986-04-04Temperature 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 1986-04-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 144 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
1334 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
144 m²/s²
0-3 km storm-relative helicity
138 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 041818
SVRFSM
OKC135-041915-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE FORT SMITH AR
1218 PM CST FRI APR 4 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 115 PM CST FOR PEOPLE IN THE FOLLOWING 
COUNTY OF

OKLAHOMA...SEQUOYAH

AT 1217PM A SEVERE THUNDERSTORM WAS INDICATED BY RADAR 5 MILES
WEST OF SALLISAW OKLAHOMA MOVING TOWARD THE NORTHEAST AT 35
MPH.

LARGE HAIL AND STRONG SURFACE WINDS MAY OCCUR WITH THIS STORM. IF
YOU OBSERVE ANY LARGE HAIL OR STRONG WINDS PLEASE RELAY YOUR
REPORT TO THE NEAREST LAW ENFORCEMENT AGENCY.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 3, 10:23 PM CSTSevere Thunderstorm WarningTSASequoyah67 min
Apr 3, 10:23 PM CSTSevere Thunderstorm WarningTSALeFlore67 min
Apr 4, 9:05 AM CSTSevere Thunderstorm WarningTSACherokee55 min
Apr 4, 9:13 AM CSTSevere Thunderstorm WarningTSASequoyah62 min
Apr 4, 10:24 AM CSTSevere Thunderstorm WarningTSAPittsburg66 min
Apr 4, 11:31 AM CSTSevere Thunderstorm WarningTSALatimer, Pittsburg59 min
Apr 4, 12:31 PM CSTSevere Thunderstorm WarningTSALatimer59 min
Apr 4, 12:47 PM CSTSevere Thunderstorm WarningTSALeFlore58 min
Apr 4, 1:33 PM CSTFlash Flood WarningTSALatimer, Pittsburg4 hr
Apr 4, 2:39 PM CSTSevere Thunderstorm WarningTSALatimer66 min
Apr 4, 4:57 PM CSTSevere Thunderstorm WarningTSALeFlore63 min

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.