Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 50, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Apr 14, 1986, 12:52 AM CST for LeFlore County, Sequoyah County, Oklahoma. It was in force for 68 min. 4 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
- Apr 14, 1986, 12:52 AM CST (06:52 UTC)
- Expired
- Apr 14, 1986, 2:00 AM CST
- In force
- 68 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 14, 12:55 AM CST | Thunderstorm Wind 0 | Le Flore, OK | |
| Apr 14, 1:00 AM CST | Hail 1.75 | Sequoyah, OK | |
| Apr 14, 1:45 AM CST | Hail 1.75 | Le Flore, OK | |
| Apr 14, 1:45 AM CST | Hail 1.75 | Le Flore, 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
Springfield, MO (KUMN), launched 00:00Z, 6.9 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2255 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 27 m²/s²
- 0-3 km storm-relative helicity
- 353 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFSM 140652 SVRFSM OKC079-135-140800- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE FORT SMITH AR 1252 AM CST MON APR 14 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 200 AM CST FOR PEOPLE IN THE FOLLOWING COUNTIES OF OKLAHOMA...LEFLORE AND SEQUOYAH AT 1245AM A LINE OF SEVERE THUNDERSTORMS WERE INDICATED BY RADAR FROM 5 MILES WEST OF SALLISAW OKLAHOMA EXTENDING SOUTHWEST TO NEAR STIGLER OKLAHOMA MOVING SOUTHEAST AT 40 MPH. THESE THUNDERSTORMS HAVE A HISTORY OF PRODUCING DAMAGING WINDS 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.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 13, 9:39 PM CST | Severe Thunderstorm Warning | TSA | Osage, Pawnee | 66 min |
| Apr 13, 10:24 PM CST | Severe Thunderstorm Warning | TSA | Creek, Tulsa | 66 min |
| Apr 13, 10:24 PM CST | Severe Thunderstorm Warning | TSA | Nowata | 66 min |
| Apr 13, 10:47 PM CST | Severe Thunderstorm Warning | TSA | Craig, Rogers | 58 min |
| Apr 13, 11:35 PM CST | Severe Thunderstorm Warning | TSA | Okmulgee, Wagoner | 55 min |
| Apr 13, 11:56 PM CST | Severe Thunderstorm Warning | TSA | Muskogee | 64 min |
| Apr 14, 12:09 AM CST | Severe Thunderstorm Warning | TSA | Cherokee | 66 min |
| Apr 14, 12:20 AM CST | Severe Thunderstorm Warning | TSA | McIntosh | 55 min |
| Apr 14, 12:28 AM CST | Severe Thunderstorm Warning | TSA | Haskell | 62 min |
| Apr 14, 1:07 AM CST | Severe Thunderstorm Warning | TSA | LeFlore | 68 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.