Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 33, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Apr 7, 1986, 11:19 PM CST for Delaware County, Oklahoma. It was in force for 56 min. 2 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 7, 1986, 11:19 PM CST (05:19 UTC)
- Expired
- Apr 8, 1986, 12:15 AM CST
- In force
- 56 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
County Delaware 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 7, 11:41 PM CST | Hail 1.75 | Delaware, OK | |
| Apr 7, 11:41 PM CST | Hail 1.75 | Delaware, 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, 5.3 hours before the alert went out and 105 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
- 1744 J/kg
- Mixed-layer CIN
- -19 J/kg
- Mixed-layer LCL
- 1228 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 128 m²/s²
- 0-3 km storm-relative helicity
- 229 m²/s²
- Significant tornado parameter
- 1.7
- Supercell composite
- 10.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KTUL 080519 SVRTUL OKC041-080615- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 1119 PM CST MON APR 7 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1215 AM CST FOR PEOPLE IN THE FOLLOWING COUNTY OF OKLAHOMA...DELAWARE AT 1115 PM A LINE OF SEVERE THUNDERSTORMS WERE LOCATED FROM NEAR AFTON TO NEAR FAIRLAND OKLAHOMA. THE THUNDERSTORM WAS MOVING TO THE SOUTHEAST AT 40 MILES PER HOUR. IF YOU ARE IN OR NEAR THE WARNING AREA GET TO A REINFORCED SHELTER AND PREPARE FOR STRONG DAMAGING WIND...LARGE HAIL...VERY HEAVY RAINFALL AND LIGHTNING. PEOPLE IN MOBILE HOMES SHOULD SEEK SHELTER IN A NEARBY REINFORCED BUILDING OR GET INTO A DITCH OR OTHER GROUND DEPRESSION. KEEP TUNED TO THIS STATION FOR THE LATEST WEATHER BULLETINS.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Local storm report, Apr 7, 7:58 PM CST, 3 hours 21 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
800 PM CST MON APR 7 1986
TIME EVENT
455 PM CST 3/4 INCHE HAIL 5 MILES EAST OF NOWATA,OK.( OHP )
544 PM CST TORNADO 3 MILES NORTH OF ADAIR OK. (HAM WEA. OBS.)
555 PM CST TORNADO JUST NE OF ADAIR OK. (OHP)
TREES DOWN AND A CAR OVERTURNED JUST NORTHWEST OF
ADAIR, OK. ( HAM WEA. OBS. )
607 PM CST SOLFBALL SIZE HAIL AT PENSACOLA, OK (HAM WEA. OBS.)
608 PM CST GOLFBALL SIZE HAIL OUTSIDE OF VINITA, OK (OHP)
617 PM CST TREES DOWN AND FLOODING AT LANGLEY, OK (HAM WEA. OBS. )
704 PM CST 1 INCHE HAIL NEAR COLCORD, OK (WSO, FSM)
720 PM CST 3/4 INCHES HAIL NEAR WEST SILOAM SPRINGS, OK (WSO,FSM)The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 7, 6:43 PM CST | Severe Thunderstorm Warning | TSA | Adair, Delaware | 62 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.