Alert archive / Nebraska / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 69, NWS North Platte, NE

August 5, 1987Boyd County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Aug 5, 1987, 10:44 PM CDT for Boyd County, Nebraska. It was in force for 26 min.

The area

The counties it named.

The facts

Issued
Aug 5, 1987, 10:44 PM CDT (03:44 UTC)
Expired
Aug 5, 1987, 11:10 PM CDT
In force
26 min
Issued by
NWS North Platte, NE
Area
Whole counties

County Boyd 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

Aberdeen, SD (KHON), launched 00:00Z, 3.7 hours before the alert went out and 224 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, Aberdeen, SD at 00:00Z on 1987-08-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1188 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Aberdeen, SD at 00:00Z on 1987-08-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 43 square meters per square second.193958Sfc1 km3 km6 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
1188 J/kg
Mixed-layer CIN
-87 J/kg
Mixed-layer LCL
1877 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
43 m²/s²
0-3 km storm-relative helicity
229 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KOFK 060344
SVROFK
NEC089-015-060440-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORFOLK NE
1044 PM CDT WED AUG 5 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 1140 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

NORTH CENTRAL NEBRASKA...NORTHERN HOLT AND BOYD

AT 1040 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM 40 MILES
NORTHWEST OF O NEILL MOVING TO THE SOUTHEAST AT 30 MPH.  THIS
STORM WAS LOCATED OVER THE WESTERN PART OF BOYD COUNTY AND WAS
MOVING INTO NORTHWEST HOLT COUNTY AND WILL EFFECT THE COMMUNITIES
OF NAPER...BUTTE...SPENCER...LYNCH...STUART...ATKINSON...EMMET
AND O NEILL.

REMEMBER...SEVERE THUNDERSTORMS CAN PRODUCE DEADLY WINDS IN EXCESS
OF 75 MPH...LARGE HAIL...KILLER LIGHTNING...AND TORRENTIAL RAINS
THAT CAN QUICKLY FLOOD A LOW LYING AREA.

 A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR NORTH CENTRAL
 NEBRASKA UNTIL 3 AM kCDT.
 BOWMAN 0344Z

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 5, 10:44 PM CDTSevere Thunderstorm WarningLBFHolt56 min
Aug 6, 1:32 AM CDTSevere Thunderstorm WarningLBFCuming, Stanton, Wayne38 min
Aug 6, 1:32 AM CDTSevere Thunderstorm WarningLBFMadison38 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 1987Every 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.