Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 20, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Apr 4, 1986, 12:47 PM CST for LeFlore County, Oklahoma. It was in force for 58 min. 1 report 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 4, 1986, 12:47 PM CST (18:47 UTC)
- Expired
- Apr 4, 1986, 1:45 PM CST
- In force
- 58 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
County LeFlore 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 4, 1:40 PM CST | Hail 1 | 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 12:00Z, 6.8 hours before the alert went out and 237 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
- 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
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFSM 041847 SVRFSM OKC079-041945- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE FORT SMITH AR 1247 PM CST FRI APR 4 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 145 PM CST FOR PEOPLE IN THE FOLLOWING COUNTY OF OKLAHOMA...LEFLORE AT 1240 PM A SEVERE THUNDERSTORM WAS INDICATED BY RADAR 5 MILES EAST OF RED OAK OKLAHOMA MOVING TOWARD THE EAST NORTHEAST AT 35 MILES AN HOUR. DANGEROUS LIGHTNING..LARGE HAIL AND STRONG AND POTENTIALLY DAMAGING WINDS ARE LIKELY WITH THIS STORM. GO TO A SAFE PLACE IMMEDIATELY.
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 3, 10:23 PM CST | Severe Thunderstorm Warning | TSA | Sequoyah | 67 min |
| Apr 3, 10:23 PM CST | Severe Thunderstorm Warning | TSA | LeFlore | 67 min |
| Apr 4, 9:05 AM CST | Severe Thunderstorm Warning | TSA | Cherokee | 55 min |
| Apr 4, 9:13 AM CST | Severe Thunderstorm Warning | TSA | Sequoyah | 62 min |
| Apr 4, 10:24 AM CST | Severe Thunderstorm Warning | TSA | Pittsburg | 66 min |
| Apr 4, 11:31 AM CST | Severe Thunderstorm Warning | TSA | Latimer, Pittsburg | 59 min |
| Apr 4, 12:18 PM CST | Severe Thunderstorm Warning | TSA | Sequoyah | 57 min |
| Apr 4, 12:31 PM CST | Severe Thunderstorm Warning | TSA | Latimer | 59 min |
| Apr 4, 1:33 PM CST | Flash Flood Warning | TSA | Latimer, Pittsburg | 4 hr |
| Apr 4, 2:39 PM CST | Severe Thunderstorm Warning | TSA | Latimer | 66 min |
| Apr 4, 4:57 PM CST | Severe Thunderstorm Warning | TSA | LeFlore | 63 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.