Alert archive / Nebraska / Tornado Warnings in 1986

Tornado Warning 31, NWS North Platte, NE

August 6, 1986Custer County, Logan County, Nebraska

NWS North Platte, NE issued this tornado warning at Aug 6, 1986, 8:24 PM CDT for Custer County, Logan County, Nebraska. It was in force for 56 min.

The area

The counties it named.

The facts

Issued
Aug 6, 1986, 8:24 PM CDT (01:24 UTC)
Expired
Aug 6, 1986, 9:20 PM CDT
In force
56 min
Issued by
NWS North Platte, NE
Area
Whole counties

Counties Custer County, NE, Logan County, NE

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 1.4 hours before the alert went out and 57 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, N. Platte/Lee Bi, NE at 00:00Z on 1986-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2131 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, N. Platte/Lee Bi, NE at 00:00Z on 1986-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 54 square meters per square second.193958Sfc1 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
2131 J/kg
Mixed-layer CIN
-88 J/kg
Mixed-layer LCL
2158 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
54 m²/s²
0-3 km storm-relative helicity
241 m²/s²
Significant tornado parameter
0.0
Supercell composite
12.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLBF 070124
TORLBF
NEC041-113-070220-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
824 PM CDT WED AUG 6 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 920 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF

WEST CENTRAL NEBRASKA...CUSTER AND LOGAN

AT 820 PM CDT RADAR INDICATED A POSSIBLE TORNADO 10 MILES SOUTH OF
HALSEY NEBRASKA MOVING SOUTH AT 25 MPH.  THIS WOULD INCLUDE THE
TOWNS OF STAPLETON..ANSELMO..ARNOLD..BROKEN BOW AND CALLAWAY.

IF YOU ARE NEAR THE PATH OF THIS TORNADO...YOU SHOULD GO TO A
BASEMENT SHELTER IF AVAILABLE.  OTHERWISE GO TO A CENTRAL ROOM ON
THE LOWEST FLOOR POSSIBLE.  ABANDON CARS AND MOBILE HOMES FOR A
REINFORCED BUILDING.

REPORTS OF TORNADOS OR TORNADO DAMAGE SHOULD BE GIVEN TO A LAW
ENFORCEMENT AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE.

MEYER 0124Z

The office that day

Everything else NWS North Platte, NE issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 6, 7:53 PM CDTTornado WarningLBFThomas57 min
Aug 6, 9:22 PM CDTTornado WarningLBFCuster, Lincoln, Logan58 min
Aug 6, 10:14 PM CDTSevere Thunderstorm WarningLBFBoyd, Holt, Keya Paha56 min
Aug 6, 10:25 PM CDTTornado WarningLBFCuster35 min
Aug 6, 10:50 PM CDTSevere Thunderstorm WarningLBFHolt55 min
Aug 7, 12:25 AM CDTSevere Thunderstorm WarningLBFBoone20 min

Nearby

Tornado Warnings in Nebraska, 1986Every tornado warning in 1986Tornadoes 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; the sounding from the Mesonet's radiosonde archive.