Alert archive / Nebraska / Tornado Warnings in 1987

Tornado Warning 11, NWS Hastings, NE

July 3, 1987Greeley County, Valley County, Nebraska

NWS Hastings, NE issued this tornado warning at Jul 3, 1987, 5:40 PM CDT for Greeley County, Valley County, Nebraska. It was in force for 20 min.

The area

The counties it named.

The facts

Issued: Jul 3, 1987, 5:40 PM CDT (22:40 UTC)
Expired: Jul 3, 1987, 6:00 PM CDT
In force: 20 min
Issued by: NWS Hastings, NE
Area: Whole counties

Counties Greeley County, NE, Valley 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, 10.7 hours before the alert went out and 162 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: 8 J/kg
Mixed-layer CIN: -234 J/kg
Mixed-layer LCL: 1565 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 11 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 KGRI 032240
TORGRI
NEC077-175-032300-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE GRAND ISLAND NE
540 PM CDT FRI JUL 3 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 600 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF

CENTRAL NEBRASKA...WESTERN GREELEY AND VALLEY

AT 535 PM CDT RADAR INDICATED A TORNADO 5 MILES SOUTHWEST OF
NORTH LOUP NEB.  MOVING TO THE NORTHEAST AT 25 MPH.

IF YOU ARE IN THE PATH OF THIS TORNADO TAKE SHELTER IN A BASEMENT
IF AVAILABLE.  OTHERWISE GO TO A SMALL INTERIOR ROOM ON THE LOWEST
FLOOR.  ABANDON CARS AND MOBILE HOMES FOR A REINFORCED BUILDING.

PEOPLE IN THE PATH OF THIS TORNADO SHOULD TAKE COVER IMMEDIATELY
TO SAVE YOUR LIVES.

IF YOU ARE CAUGHT IN THE OPEN... TRY TO HIDE IN A DEPRESSION SUCH AS
A DITCH OR CULVERT.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 3, 6:19 PM CDT	Severe Thunderstorm Warning	GID	Greeley, Valley	56 min

Nearby

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