Alert archive / Nebraska / Tornado Warnings in 1987

Tornado Warning 2, NWS North Platte, NE

May 19, 1987Platte County, Nebraska

NWS North Platte, NE issued this tornado warning at May 19, 1987, 9:01 PM CDT for Platte County, Nebraska. It was in force for 29 min.

The area

The counties it named.

The facts

Issued
May 19, 1987, 9:01 PM CDT (02:01 UTC)
Expired
May 19, 1987, 9:30 PM CDT
In force
29 min
Issued by
NWS North Platte, NE
Area
Whole counties

County Platte 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

Omaha, NE (KOAX), launched 00:00Z, 2.0 hours before the alert went out and 100 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, Omaha, NE at 00:00Z on 1987-05-20Temperature 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, Omaha, NE at 00:00Z on 1987-05-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 24 square meters per square second.193958Sfc1 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
3590 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
24 m²/s²
0-3 km storm-relative helicity
82 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 200201
TOROFK
NEC141-200230-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE NORFOLK NE
901 PM CDT TUE MAY 19 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 930 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF

NORTHEAST NEBRASKA...NORTHERN PLATTE

AT 850 PM CDT A TORNADO WAS REPORTED BY THE PUBLIC IN THE CORNLEA
AREA IN NORTHERN PLATTE COUNTY OR ABOUT 30 MILES SOUTH OF NORFOLK.
THE TORNADO WAS MOVING TO THE EAST AROUND 20 MPH.

PERSONS IN CORNLEA AND HUMPHREY SHOULD TAKE COVER IMMEDIALTELY.

PEOPLE IN THE PATH OF THIS TORNADO SHOULD GO TO A BASEMENT SHELTER
IF POSSIBLE...OTHERWISE GO TO A CENTRAL INTERIOR5 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 20, 2:58 PM CDTSevere Thunderstorm WarningLBFStanton62 min
May 20, 2:58 PM CDTSevere Thunderstorm WarningLBFWayne32 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.