Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 41, NWS Tulsa, OK

April 13, 1986Osage County, Pawnee County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 13, 1986, 9:39 PM CST for Osage County, Pawnee County, Oklahoma. It was in force for 66 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 13, 1986, 9:39 PM CST (03:39 UTC)
Expired
Apr 13, 1986, 10:45 PM CST
In force
66 min
Issued by
NWS Tulsa, OK
Area
Whole counties

Counties Osage County, OK, Pawnee 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

TimeReportWhereRemark
Apr 13, 10:19 PM CSTThunderstorm Wind 0Pawnee, OK
Apr 13, 10:28 PM CSTHail 1.75Pawnee, OK
Apr 13, 10:55 PM CSTHail 1.75Osage, OK
Apr 13, 10:55 PM CSTHail 1.75Osage, 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, 3.7 hours before the alert went out and 152 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-pSkew-T log-p diagram, Ok Cty/Will Rgrs, OK at 00:00Z on 1986-04-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1389 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Ok Cty/Will Rgrs, OK at 00:00Z on 1986-04-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 271 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
1389 J/kg
Mixed-layer CIN
-169 J/kg
Mixed-layer LCL
1231 m above ground
0-6 km bulk shear
65 kt
0-1 km storm-relative helicity
271 m²/s²
0-3 km storm-relative helicity
466 m²/s²
Significant tornado parameter
0.5
Supercell composite
3.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KTUL 140339
SVRTUL
OKC113-117-140445-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
939 PM CST SUN APR 13 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 1045 PM CST FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

OKLAHOMA...OSAGE AND PAWNEE

AT 936  PM  A LINE OF SEVERE THUNDESTORMS WAS MOVING ACROSS
KAY AND NOBLE COUNTIES OF OKLAHOMA.

THE THUNDERSTORM WAS MOVING TO THE SOUTHEAST AT 45 MILES
PER HOUR.

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.

IssuedProductOfficeCountiesLasted
Apr 13, 10:24 PM CSTSevere Thunderstorm WarningTSACreek, Tulsa66 min
Apr 13, 10:24 PM CSTSevere Thunderstorm WarningTSANowata66 min
Apr 13, 10:47 PM CSTSevere Thunderstorm WarningTSACraig, Rogers58 min
Apr 13, 11:35 PM CSTSevere Thunderstorm WarningTSAOkmulgee, Wagoner55 min
Apr 13, 11:56 PM CSTSevere Thunderstorm WarningTSAMuskogee64 min
Apr 14, 12:09 AM CSTSevere Thunderstorm WarningTSACherokee66 min
Apr 14, 12:20 AM CSTSevere Thunderstorm WarningTSAMcIntosh55 min
Apr 14, 12:28 AM CSTSevere Thunderstorm WarningTSAHaskell62 min
Apr 14, 12:52 AM CSTSevere Thunderstorm WarningTSALeFlore, Sequoyah68 min
Apr 14, 1:07 AM CSTSevere Thunderstorm WarningTSALeFlore68 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.