Alert archive / Nebraska / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 29, NWS North Platte, NE

July 6, 1987Arthur County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jul 6, 1987, 7:12 PM MDT for Arthur County, Nebraska. It was in force for 48 min.

The area

The counties it named.

The facts

Issued: Jul 6, 1987, 7:12 PM MDT (01:12 UTC)
Expired: Jul 6, 1987, 8:00 PM MDT
In force: 48 min
Issued by: NWS North Platte, NE
Area: Whole counties

County Arthur 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 00:00Z, 1.2 hours before the alert went out and 104 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 070112
SVRLBF
NEC005-070200-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
812 PM CDT MON JUL 6 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 900 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTY OF

NORTH CENTRAL NEBRASKA...SOUTHERN EASTERN ARTHUR

RADAR INDICATES A SEVERE THUNDERSTORM 3 MILES SOUT OF ARTHUR IN
NORTH CENTRAL NEBRASKA WITH LITTLE MOVEMENT NOTED.

IF THREATENING WEATHER APPROACHES...GET TO A REINFORCED SHELTER AND
PREPARE FOR STRONG DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DANGEROUS LIGHTNING.

REPORTS OF SEVERE WEATHER OR DAMAGE CAN BE GIVEN TO A LAW
ENFORCEMENT kAGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE.

NAME           Z

What forecasters said that day

The local office's own words before this severe thunderstorm 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, 16 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, 7:08 PM MDT	Tornado Warning	LBF	Arthur, Keith	67 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

Severe Thunderstorm Warnings in Nebraska, 1987 Every severe thunderstorm warning 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.