Alert archive / Oklahoma / Tornado Warnings in 1986

Tornado Warning 1, NWS Tulsa, OK

April 7, 1986Craig County, Mayes County, Oklahoma

NWS Tulsa, OK issued this tornado warning at Apr 7, 1986, 5:44 PM CST for Craig County, Mayes County, Oklahoma. It was in force for 61 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: Apr 7, 1986, 5:44 PM CST (23:44 UTC)
Expired: Apr 7, 1986, 6:45 PM CST
In force: 61 min
Issued by: NWS Tulsa, OK
Area: Whole counties

Counties Craig County, OK, Mayes 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
Apr 7, 5:44 PM CST	Tornado F2	Mayes, OK
Apr 7, 6:07 PM CST	Hail 4	Mayes, OK
Apr 7, 6:08 PM CST	Hail 1.75	Craig, 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, 11.7 hours before the alert went out and 133 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: 1249 J/kg
Mixed-layer CIN: -65 J/kg
Mixed-layer LCL: 786 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 142 m²/s²
0-3 km storm-relative helicity: 161 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 3.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KTUL 072344
TORTUL
OKC097-035-041-080045-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE TULSA OK
544 PM CST MON APR 7 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 645 PM CST FOR PEOPLE IN THE FOLLOWING COUNTIES OF

OKLAHOMA...NORTHERN MAYES...SOUTHERN CRAIG AND DELAWARE

AT 540  PM ..A TORNADO WAS  INDICATED BY RADAR 5 MILES
NORTHWEST OF PENSACOLA OKLAHOMA

THE TORNADO WAS MOVING TO THE  EAST SOUTHEAST AT 25
MILES PER HOUR.

THIS IS AN EXTREMELY DANGEROUS SITUATION.  PEOPLE IN THE PATH OF
THIS TORNADO SHOULD MOVE TO A SHELTER BELOW GROUND...IF AVAILABLE.
OTHERWISE...GO TO A SMALL CENTRAL INTERIOR ROOM ON THE LOWEST
FLOOR POSSIBLE.   STAY AWAY FROM WINDOWS AND OUTSIDE WALLS.
ABANDON CARS AND MOBILE HOMES AND SEEK SHELTER IN A REINFORCED
BUILDING OR GET INTO A DITCH OR GROUND DEPRESSION.

KEEP TUNED TO THIS STATION FOR THE LATEST WEATHER BU LLETINS.

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 7, 4:45 PM CST	Severe Thunderstorm Warning	TSA	Nowata, Washington	60 min
Apr 7, 5:13 PM CST	Severe Thunderstorm Warning	TSA	Craig	62 min

Nearby

Tornado Warnings in Oklahoma, 1986 Every tornado warning in 1986 Tornadoes 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.