Alert archive / Nebraska / Tornado Warnings in 1986

Tornado Warning 9, NWS North Platte, NE

April 17, 1986Lincoln County, Nebraska

NWS North Platte, NE issued this tornado warning at Apr 17, 1986, 6:09 PM CST for Lincoln County, Nebraska. It was in force for 23 min.

The area

The counties it named.

The facts

Issued
Apr 17, 1986, 6:09 PM CST (00:09 UTC)
Expired
Apr 17, 1986, 6:32 PM CST
In force
23 min
Issued by
NWS North Platte, NE
Area
Whole counties

County Lincoln 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, 0.2 hours before the alert went out and 15 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 1986-04-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 35 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 1986-04-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 204 square meters per square second.1939587897Sfc1 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
35 J/kg
Mixed-layer CIN
-139 J/kg
Mixed-layer LCL
1206 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
204 m²/s²
0-3 km storm-relative helicity
411 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLBF 180009
TORLBF
NEC111-180032-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
609 PM CST THU APR 17 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 632 PM CST FOR PEOPLE IN THE FOLLOWING COUNTY OF

SOUTHWEST NEBRASKA...EASTERN LINCOLN

AT 602 PM CST A FUNNEL CLOUD WAS REPORTED BY SPOTTERS 9 MILES EAST
OF NORTH PLATTE NEBRASKA MOVING TO THE NORTHEAST.
PERSONS IN MAXWELL NEBRASKA SHOULD TAKE COVER.

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 AF
REINFORCED BUILDING.

BRITTON 0008Z

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 17, 7:09 PM CSTSevere Thunderstorm WarningLBFLogan, Thomas51 min
Apr 17, 7:09 PM CSTSevere Thunderstorm WarningLBFCuster51 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.