Alert archive / Nebraska / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 39, NWS North Platte, NE

June 21, 1986Keith County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jun 21, 1986, 6:25 PM MDT for Keith County, Nebraska. It was in force for 65 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
Jun 21, 1986, 6:25 PM MDT (00:25 UTC)
Expired
Jun 21, 1986, 7:30 PM MDT
In force
65 min
Issued by
NWS North Platte, NE
Area
Whole counties

County 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

TimeReportWhereRemark
Jun 21, 7:05 PM MDTThunderstorm Wind 0Keith, 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, 0.4 hours before the alert went out and 89 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 00:00Z on 1986-06-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2243 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, N. Platte/Lee Bi, NE at 00:00Z on 1986-06-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 square meters per square second.19395878Sfc1 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
2243 J/kg
Mixed-layer CIN
-91 J/kg
Mixed-layer LCL
2007 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
120 m²/s²
Significant tornado parameter
0.0
Supercell composite
8.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLBF 220025
SVRLBF
NEC005-101-075-220130-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
625 PM MDT SAT JUN 21 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 730 PM MDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

WEST CENTRAL NEBRASKA...ARTHUR...KEITH AND GRANT

AT 615 PM MDT 65 MILE AN HOUR WINDS WERE REPORTED AT LEMOYNE
NEBRASKA IN KEITH COUNTY WHICH IS 55 MILES WEST OF NORTH PLATTE
NEBRASKA.

IF THREATENING WEATHER APPROACHES...GET TO A REINFORCED SHELTER AND
PREPARE FOR STRONG DAMAGING WIND..LARGE HAIL..VERY HEAVY RAIN AND
DANGEROUS LIGHTNING.  REMEMBER...THESE STORMS CAN AND OCCASIONALLY
DO PRODUCE A TORNADO WITH LITTLE OR NO ADVANCE WARNING..SO BE ON THE
LOOKOUT!!

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

SEVERE THUNDERSTORMS PRODUCE DAMAGING W&INDS IN EXCESS OF 60 MPH..
LARGE HAIL GREATER THAN 3/4 INCH IN DIAMETER..DEADLY LIGHTNING
AND VERY HEAVY RAIN THAT CAN FLOOD A LOW LYING AREA QUICKLY.

MEYER 0024Z

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

Special weather statement, Jun 21, 5:59 PM MDT, 26 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
755 PM CDT SAT JUN 21 1986

THUNDERSTROMS HAD DEVELOPED ACROSS SOUTHWEST AND WEST CENTRAL NEBRASKA
THIS EVENING.

A VERY STRONG THUNDERSTORM WAS 5 MILES NORTH OF ARTHUR NEBRASKA IN
ARTHUR COUNTY OF WEST CENTRAL NEBRASKA WHICH IS ABOUT 55 MILES
NORTHWEST OF NORTH PLATTE NEBRASKA.  THE THUNDERSTORMS WERE MOVING EAST
AT 30 MILES AN HOUR.

PERSONS IN THE VICINITY OF THESE THUNDERSTORMS CAN EXPECT SOME HAIL..
HEAVY RAIN..GUSTY WIND AND FREQUENT LIGHTNING.

MEYER
Special weather statement, Jun 21, 6:03 PM MDT, 22 minutes before
SPECIAL WEATHER STATEMENT...CORRECTION FOR THE TIME...
NATIONAL WEATHER SERVICE NORTH PLATTE NE
755 PM CDT SAT JUN 21 1986

THUNDERSTROMS HAD DEVELOPED ACROSS SOUTHWEST AND WEST CENTRAL NEBRASKA
THIS EVENING.

AT 755 PM CDT A VERY STRONG THUNDERSTORM WAS 5 MILES NORTH OF ARTHUR
NEBRASKA IN ARTHUR COUNTY OF WEST CENTRAL NEBRASKA WHICH IS ABOUT 55
MILES NORTHWEST OF NORTH PLATTE NEBRASKA.  THE THUNDERSTORMS WERE
MOVING EAST AT 30 MILES AN HOUR.

PERSONS IN THE VICINITY OF THESE THUNDERSTORMS CAN EXPECT SOME HAIL..
HEAVY RAIN..GUSTY WIND AND FREQUENT LIGHTNING.

MEYER

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 21, 6:25 PM MDTSevere Thunderstorm WarningLBFArthur, Grant65 min
Jun 21, 7:17 PM MDTSevere Thunderstorm WarningLBFLincoln, McPherson73 min
Jun 21, 7:17 PM MDTSevere Thunderstorm WarningLBFHooker73 min
Jun 21, 7:31 PM MDTSevere Thunderstorm WarningLBFKeith29 min
Jun 21, 7:46 PM MDTSevere Thunderstorm WarningLBFThomas44 min
Jun 21, 7:56 PM MDTSevere Thunderstorm WarningLBFLincoln54 min
Jun 21, 8:23 PM MDTSevere Thunderstorm WarningLBFCuster57 min
Jun 21, 8:26 PM MDTSevere Thunderstorm WarningLBFBlaine, Brown, Loup, Rock39 min
Jun 21, 8:26 PM MDTTornado WarningLBFCuster24 min
Jun 21, 9:36 PM MDTSevere Thunderstorm WarningLBFWheeler24 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 1986Every severe thunderstorm warning in 1986

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.