Alert archive / Nebraska / Tornado Warnings in 1987

Tornado Warning 1, NWS North Platte, NE

May 17, 1987Keith County, Lincoln County, Nebraska

NWS North Platte, NE issued this tornado warning at May 17, 1987, 3:33 PM MDT for Keith County, Lincoln County, Nebraska. It was in force for 42 min.

The area

The counties it named.

The facts

Issued
May 17, 1987, 3:33 PM MDT (21:33 UTC)
Expired
May 17, 1987, 4:15 PM MDT
In force
42 min
Issued by
NWS North Platte, NE
Area
Whole counties

Counties Keith County, NE, Lincoln 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, 9.6 hours before the alert went out and 51 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 1987-05-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 43 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°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 1987-05-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -17 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
43 J/kg
Mixed-layer CIN
-240 J/kg
Mixed-layer LCL
1635 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
-17 m²/s²
0-3 km storm-relative helicity
10 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 172133
TORLBF
NEC101-111-172215-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
433 PM CDT SUN MAY 17 1987
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING
EFFECTIVE UNTIL  515 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN SOUTHWEST NEBRASKA
          ...EASTERN KEITH...WESTERN LINCOLN
 
AT 430 PM CDT A TORNADO WAS REPORTED BY THE PUBLIC 5 MILES NORTHWEST
OF HERSHEY MOVING TO THE EAST AT 15 MILES AN HOUR.  THIS WARNING
INCLUDES THE COMMUNITIES OF HERSHEY, PAXTON AND SUTHERLAND.
 
 
IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS A
BASEMENT.  GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE.
IF NO BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR ROOM
SUCH AS A CLOSET ON THE LOWEST FLOOR.  USE BLANKETS...PILLOWS...
OR CUSHIONS TO COVER YOUR BODY.  AVOID WINDOWS.
 
THIS IS A DANGEROUS STORM SITUATION.  ACT QUICKLY.  IF YOU ARE
IN THE PATH OF THIS TORNADO MOVE TO A SHELTER BELOW GROUND IF
AVAILABLE.  OTHERWISE...GO TO A SMALL INTERIOR ROOM ON THE LOWEST
FLOOR POSSIBLE.  AVOID WINDOWS.  ABANDON CARS AND MOBILE HOMES
FOR A REINFORCED BUILDING OR GET INTO A DITCH OR CULVERT.
 
IF YOU LIVE IN A HOME OR APARTMENT...SEEK SHELTER IN THE
INNERMOST PORTION OF THE BUILDING ON THE LOWEST FLOOR.  GET TO
A BASEMENT IF ONE IS AVAILABLE.  AVOID WINDOWS AND PROTECT YOUR
BODY FROM FLYING DEBRIS WITH CUSHIONS...BLANKETS...OR PILLOWS.

What forecasters said that day

The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, May 17, 2:17 PM MDT, 1 hour 16 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
315 PM CDT SUN MAY 17 1987

THUNDERSTORMS HAD DEVELOPED ACROSS NORTH CENTRAL NEBRASKA THIS
AFTERNOON.

AT 300 PM CDT STRONG THUNDERSTORMS HAD DEVELOPED IN NORTHEAST MCHPERSON
COUNTY AND EXTENDED IN A LINE TO THE EAST ALONG NORTH LOGAN COUNTY.
THE STRONGEST THUNDERSTORM WAS 10 MILES NORTHEAST OF TRYON NEBRASKA
OR ABOUT 30 MILES NORTH OF NORTH PLATTE NEBRASKA.  ALL THE
THUNDERSTORMS WERE MOVING TO THE NORTHEAST AT 10 TO 15 MPH.  BRIEF
HEAVY RAINS AND GUSTY WINDS CAN BE EXPECTED IN THE VICINITY OF THE
THUNDERSTORMS.

A SLOW MOVING COLD FRONT WAS LOCATED ACROSS NORTH CENTRAL AND SOUTHWEST
NEBRASKA THIS AFTERNOON.  THUNDERSTORM9S ARE EXPECTED TO CONTINUE TO
DEVELOP IN THE VICINITY OF THIS FRONT AS IT MOVES SLOWLY TO THE
SOUTHEAST THE REMAINDER OF THIS AFTERNOON AND THIS EVENING.
MEYER
Special weather statement, May 17, 2:48 PM MDT, 45 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
245 PM MDT SUN MAY 17 1987

THUNDERSTORMS CONTINUE TO DEVELOP ACROSS NORTH CENTRAL AND SOUTHWEST
NEBRASKA THIS AFTERNOON.

AT 240 PM MDT INTENSE THUNDERSTORMS HAD MOVED INTO EXTREME SOUTHWEST
NEBRASKA IN THE COUNTIES OF CHASE AND DUNDY.  THE STRONGEST
THUNDERSTORM WAS 13 MILES WEST OF IMPERIAL NEBRASKA OR ABOUT 40 MILES
SOUTHWEST OF OGALLALA NEBRASKA MOVING NORTHEAST AT 15 MPH.

PERSONS IN THE VICINITY OF THESE THUNDERSTORMS CAN EXPECT HAIL...HEAVY
RAINS...DANGEROUS LIGHTNING...AND GUSTY WINDS.

THUNDERSTORMS ARE EXPECTED TO CONTINUE ACROSS PORTIONS OF NORTH CENTRAL
AND SOUTHWEST NEBRASKA FOR THE REMAINDER OF THIS AFTERNOOYN AND THIS
EVENING.

MEYER

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.