Alert archive / Nebraska / Tornado Warnings in 1986

Tornado Warning 35, NWS North Platte, NE

August 31, 1986Brown County, Keya Paha County, Nebraska

NWS North Platte, NE issued this tornado warning at Aug 31, 1986, 4:13 PM CDT for Brown County, Keya Paha County, Nebraska. It was in force for 27 min.

The area

The counties it named.

The facts

Issued
Aug 31, 1986, 4:13 PM CDT (21:13 UTC)
Expired
Aug 31, 1986, 4:40 PM CDT
In force
27 min
Issued by
NWS North Platte, NE
Area
Whole counties

Counties Brown County, NE, Keya Paha 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 12:00Z, 9.2 hours before the alert went out and 181 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 12:00Z on 1986-08-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 877 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 12:00Z on 1986-08-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 5 square meters per square second.1939Sfc1 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
877 J/kg
Mixed-layer CIN
-92 J/kg
Mixed-layer LCL
633 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
5 m²/s²
0-3 km storm-relative helicity
76 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KOFK 312113
TOROFK
NEC017-103-312140-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE NORFOLK NE
413 PM CDT SUN AUG 31 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 440 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF

NORTH CENTRAL NEBRASKA...NORTHERN BROWN AND WESTERN KEYA PAHA

AT 4PM A FUNNEL CLOUD WAS SPOTTED 5 MILES NORTHWEST OF AINSWORTH
MOVING TO THE NORTHEAST AT 10 TO 15 MILES AN HOUR.

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

 THIS IS AN% EXTREMELY DANGEROUS SITUATION...PEOPLE IN THE PATH OF
STORM SHOULD TAKE COVER IMMEDIATELY IN A BASEMENT SHELTER OR IN THE
CENTRAL PART OF THEIR HOMES.  ABANDON CARS AND MOBILE HOMES FOR A
REINFORCED SHELTER.

 VAN ALLEN

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 31, 4:44 PM CDTTornado WarningLBFBrown, Keya Paha26 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.