Alert archive / Nebraska / Tornado Warnings in 1987

Tornado Warning 12, NWS North Platte, NE

July 6, 1987Arthur County, Keith County, Nebraska

NWS North Platte, NE issued this tornado warning at Jul 6, 1987, 7:08 PM MDT for Arthur County, Keith County, Nebraska. It was in force for 67 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jul 6, 1987, 7:08 PM MDT (01:08 UTC)
Expired: Jul 6, 1987, 8:15 PM MDT
In force: 67 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.

What was reported inside it

Time	Report	Where	Remark
Jul 6, 7:08 PM MDT	Hail 1.75	Arthur, NE

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 1.1 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: 4064 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 1720 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 175 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 18.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KLBF 070108
TORLBF
NEC005-101-070215-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
808 PM CDT MON JUL 6 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 915 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF

NORTH CENTRAL NEBRASKA...SOUTHERN ARTHUR AND NORTHERN KEITH

RADAR INDICATED A POSSIBLE TORNADO 15 MILES NORTH NORTHWEST OF
LEMOYNE IN KEITH COUNTY MOVING EAST AT ABOUT 5 MPH.

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 BUILDINfG.

REPORTS OF TORNADOS OR TORNADO DAMAGE SHOULD BE GIVEN TO A LAW
ENFORCEMENT AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE.

COFFIN 062358Z

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

Local storm report, Jul 6, 6:56 PM MDT, 12 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE VALENTINE NE
745 PM CDT MON JUL 6 1987

SELS MKC OMA A VTN

TIME
620PM     CDT  PEA AND MARBLE SIZE HAIL AT MERRITT
               RESERVOIR.

635PM     CDT  PEA SIZE HAIL AT WSO VALENTINE.

730PM     CDT  TORNADO DESTROYED A BARN ON THE BRUCE REYMAN RANCH
               LOCATED 9 MILES WEST AND 6 MILES NORTH OF WOOD LAKE.
               Z
RODDA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 7:12 PM MDT	Severe Thunderstorm Warning	LBF	Arthur	48 min
Jul 6, 7:25 PM MDT	Severe Thunderstorm Warning	LBF	Perkins	55 min
Jul 6, 10:15 PM MDT	Severe Thunderstorm Warning	LBF	Cedar, Knox	60 min
Jul 6, 10:47 PM MDT	Severe Thunderstorm Warning	LBF	Stanton, Wayne	43 min
Jul 6, 11:13 PM MDT	Severe Thunderstorm Warning	LBF	Platte	47 min
Jul 6, 11:20 PM MDT	Severe Thunderstorm Warning	LBF	Lincoln	55 min
Jul 6, 11:36 PM MDT	Severe Thunderstorm Warning	LBF	Keith, Lincoln	69 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.