Alert archive / Nebraska / Tornado Warnings in 1986

Tornado Warning 6, NWS North Platte, NE

April 17, 1986Arthur County, Keith County, Nebraska

NWS North Platte, NE issued this tornado warning at Apr 17, 1986, 2:40 PM MST for Arthur County, Keith County, Nebraska. It was in force for 20 min.

The area

The counties it named.

The facts

Issued: Apr 17, 1986, 2:40 PM MST (21:40 UTC)
Expired: Apr 17, 1986, 3:00 PM MST
In force: 20 min
Issued by: NWS North Platte, NE
Area: Whole counties

Counties Arthur County, NE, Keith 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, 9.7 hours before the alert went out and 94 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: NaN m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 223 m²/s²
0-3 km storm-relative helicity: 222 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 KLBF 172140
TORLBF
NEC005-101-172200-

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

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 300 PM MST FOR PEOPLE IN THE FOLLOWING COUNTIES OF

WEST CENTRAL NEBRASKA...SOUTHERN ARTHUR AND NORTHERN KEITH

AT 235 PM MST A TORNADO WAS REPORTED BY THE OGALLALA POLICE DEPT.
NORTHEAST OF OGALLALA NEBRASKA.

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.

BRITTON 2138Z

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 17, 1:01 PM MST	Tornado Warning	LBF	Keith	29 min
Apr 17, 1:51 PM MST	Severe Thunderstorm Warning	LBF	Keith, Lincoln, Perkins	39 min
Apr 17, 2:34 PM MST	Severe Thunderstorm Warning	LBF	Hayes	46 min
Apr 17, 3:07 PM MST	Severe Thunderstorm Warning	LBF	Hayes	13 min
Apr 17, 3:17 PM MST	Severe Thunderstorm Warning	LBF	Frontier, Red Willow	38 min
Apr 17, 3:25 PM MST	Tornado Warning	LBF	Frontier, Lincoln	20 min
Apr 17, 3:56 PM MST	Severe Thunderstorm Warning	LBF	Red Willow	59 min
Apr 17, 4:44 PM MST	Tornado Warning	LBF	Lincoln	16 min
Apr 17, 4:58 PM MST	Severe Thunderstorm Warning	LBF	Custer	57 min

Nearby

Tornado Warnings in Nebraska, 1986 Every tornado warning in 1986 Tornadoes 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.