Alert archive / Nebraska / Tornado Warnings in 1986

Tornado Warning 21, NWS Cheyenne, WY

August 1, 1986Sheridan County, Nebraska

NWS Cheyenne, WY issued this tornado warning at Aug 1, 1986, 6:57 AM MDT for Sheridan County, Nebraska. It was in force for 18 min.

The area

The counties it named.

The facts

Issued
Aug 1, 1986, 6:57 AM MDT (12:57 UTC)
Expired
Aug 1, 1986, 7:15 AM MDT
In force
18 min
Issued by
NWS Cheyenne, WY
Area
Whole counties

County Sheridan 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

Rapid City, SD (KRAP), launched 12:00Z, 1.0 hours before the alert went out and 178 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, Rapid City, SD at 12:00Z on 1986-08-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Rapid City, SD at 12:00Z on 1986-08-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -26 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1793 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
-26 m²/s²
0-3 km storm-relative helicity
30 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 KBFF 011257
TORBFF
NEC161-011330-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE SCOTTSBLUFF NE
657 AM MDT FRI AUG 1 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 730 AM MDT FOR PEOPLE IN THE FOLLOWING COUNTY OF

PANHANDLE OF NEBRASKA...WEST CENTRAL SHERIDAN

AT 656AM MDT A TORNADO WAS INDICATED BY RADAR 25 MILES SOUTHEAST OF
CHADRON NEBRASKA MOVING SOUTHEAST AT 30 MILES AN HOUR.

THIS WARNING INCLUDES THE TOWN OF MIRAGE FLATS.

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

IN ADDITION TO THE THREAT OF TORNADOES..LARGE HAIL..DANGEROUS
LIGHTNING AND VERY HEAVY RAIN IS LIKELY WITH THIS STORM.

PFEIFFER

The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 31, 8:38 PM MDTSevere Thunderstorm WarningCYSKimball22 min
Aug 1, 5:51 AM MDTTornado WarningCYSDawes19 min
Aug 1, 6:04 AM MDTTornado WarningCYSDawes31 min
Aug 1, 6:29 AM MDTTornado WarningCYSDawes31 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.