Alert archive / Nebraska / Tornado Warnings in 1987

Tornado Warning 3, NWS North Platte, NE

May 29, 1987Keya Paha County, Nebraska

NWS North Platte, NE issued this tornado warning at May 29, 1987, 2:32 PM CDT for Keya Paha County, Nebraska. It was in force for 28 min.

The area

The counties it named.

The facts

Issued
May 29, 1987, 2:32 PM CDT (19:32 UTC)
Expired
May 29, 1987, 3:00 PM CDT
In force
28 min
Issued by
NWS North Platte, NE
Area
Whole counties

County 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, 7.5 hours before the alert went out and 208 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 1987-05-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 11 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 1987-05-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 square meters per square second.1939587897117Sfc1 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
11 J/kg
Mixed-layer CIN
-185 J/kg
Mixed-layer LCL
1315 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
28 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 291932
TOROFK
NEC103-292000-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE NORFOLK NE
232 PM CDT FRI MAY 29 1987

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

NORTH CENTRAL NEBRASKA...WESTERN KEYA PAHA

AT 225PM CDT TWO TORNADOES WERE REPORTED IN WESTERN KEYA PAHA COUNTY
BY THE PUBLIC ABOUT 9 MILES WEST NORTHWEST OF NORDEN OR ABOUT 15
MILES EAST OF VALENTINE NEBRASKA.  THE TORNADOES WERE MOVING TO THE
EAST AT ABOUT 20 MPH.  PERSONS IN NORDEN AND SPRINGVIEW SHOULD TAKE
COVER IMMEDIATELY.

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

 DIRCKSEN

The office that day

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

IssuedProductOfficeCountiesLasted
May 29, 2:39 PM CDTSevere Thunderstorm WarningLBFCherry51 min
May 29, 3:30 PM CDTSevere Thunderstorm WarningLBFCherry45 min

Nearby

Tornado Warnings in Nebraska, 1987Every tornado warning in 1987Tornadoes in 1987

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.