Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 76, NWS Tulsa, OK

May 17, 1986Okmulgee County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 17, 1986, 1:11 AM CDT for Okmulgee County, Oklahoma. It was in force for 64 min. 3 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: May 17, 1986, 1:11 AM CDT (06:11 UTC)
Expired: May 17, 1986, 2:15 AM CDT
In force: 64 min
Issued by: NWS Tulsa, OK
Area: Whole counties

County Okmulgee 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
May 17, 1:30 AM CDT	Thunderstorm Wind 0	Okmulgee, OK
May 17, 1:30 AM CDT	Thunderstorm Wind 0	Okmulgee, OK
May 17, 2:00 AM CDT	Thunderstorm Wind 0	Okmulgee, 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

Ok Cty/Will Rgrs, OK (KOKC), launched 00:00Z, 6.2 hours before the alert went out and 151 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2930 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 856 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 81 m²/s²
0-3 km storm-relative helicity: 102 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 5.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KTUL 170611
SVRTUL
OKC111-170715-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
111 AM CDT SAT MAY 17 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 215 AM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTY OF

NORTHEAST OKLAHOMA...OKMULGEE

AT 1 10 AM  A SEVERE THUNDESTORM WAS 5 MILES WEST OF
OKMULGEE, OKLA.

THE THUNDERSTORM WAS MOVING TO THE EAST NORTHEST AT 25 MPH.

THIS THUNDERSTORM WILL LIKELY PRODUCE WINDS IN EXCESS OF 60
MILES AN HOUR AND HAIL 3/4 INCH OR LARGER IN DIAMETER.

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.

The office that day

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

Issued	Product	Office	Counties	Lasted
May 16, 11:34 PM CDT	Severe Thunderstorm Warning	TSA	Creek	56 min
May 16, 11:52 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	68 min
May 17, 12:09 AM CDT	Tornado Warning	TSA	Okfuskee	31 min
May 17, 12:30 AM CDT	Severe Thunderstorm Warning	TSA	Rogers, Tulsa	60 min
May 17, 2:40 AM CDT	Severe Thunderstorm Warning	TSA	LeFlore, Sequoyah	50 min
May 17, 3:03 AM CDT	Tornado Warning	TSA	LeFlore, Sequoyah	57 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1986 Every 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.