Alert archive / Nebraska / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 99, NWS North Platte, NE

July 31, 1986Lincoln County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jul 31, 1986, 6:36 PM CDT for Lincoln County, Nebraska. It was in force for 54 min.

The area

The counties it named.

The facts

Issued
Jul 31, 1986, 6:36 PM CDT (23:36 UTC)
Expired
Jul 31, 1986, 7:30 PM CDT
In force
54 min
Issued by
NWS North Platte, NE
Area
Whole counties

County Lincoln 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, 11.6 hours before the alert went out and 15 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 12:00Z on 1986-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1284 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 12:00Z on 1986-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 95 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
1284 J/kg
Mixed-layer CIN
-132 J/kg
Mixed-layer LCL
1006 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
95 m²/s²
0-3 km storm-relative helicity
229 m²/s²
Significant tornado parameter
0.3
Supercell composite
4.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLBF 312336
SVRLBF
NEC029-111-135-085-010030-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
536 PM MDT THU JUL 31 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 630 PM MDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

SOUTHWEST NEBRASKA...EASTERN CHASE...SOUTHWEST LINCOLN...EASTERN 
 PERKINS AND HAYES

AT 528 PM MDT 3/4 INCH SIZE HAIL WAS REPORTED BY PERKINS COUNTY
SHERRIF.  SEVEN MILES SOUTH OF GRANT NEBRASKA IN PERKINS COUNTY.

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

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 WINDS 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.

 CARPER 2333Z

               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

Special weather statement, Jul 31, 5:18 PM CDT, 1 hour 18 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
415 PM MDT THU JUL 31 1986

AN INTENSE THUNDERSTORM HAD MOVED INTO SOUTHWEST NEBRASKA THIS
AFTERNOON.

AT 415 PM MDT AN INTENSE THUNDERSTORM HAD MOVED INTO CHASE COUNTY OF
SOUTHWEST NEBRASKA.  THE THUNDERSTORM WAS LOCATED 7 MILES NORTHWEST OF
IMPERIAL NEBRASKA MOVING EAST AT 20 MILES AN HOUR.  THE THUNDERSTORM
WOULD BE ABOUT 60 MILES SOUTHWEST OF NORTH PLATTE NEBRASKA.

AS THIS TVHUNDERSTORM MOVES ACROSS SOUTHWEST NEBRASKA PEOPLE IN THE
VICINITY SHOULD BE ON THE LOOKOUT FOR HAIL..HEAVY RAIN..GUSTY WINDS AND
DANGEROUS LIGHTNING.

MEYER
Special weather statement, Jul 31, 6:19 PM CDT, 17 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
515 PM MDT THU JUL 31 1986

INTENSE THUNDERSTORMS CONTINUED TO SPREAD ACROSS SOUTHWEST NEBRASKA
THIS THURSDAY AFTERNOON.

AT 515 PM MDT INTENSE THUNDERSTORMS WERE OVER PARTS OF CHASE..PERKINS
AND HAYES COUNTIES OF SOUTHWEST NEBRASKA.  ONE OF THE STRONGEST CELLS
WAS 7 MILES NORTH OF IMPERIAL NEBRASKA AND A SECOND VERY STRONG CELL
WAS 10 MILES SOUTHWEST OF DICKENS NEBRASKA IN LINCOLN COUNTY.  ALL THE
THUNDERSTORMS WERE MOVING EAST AT 20 MILES AN HOUR.

AS THESE THUNDERSTORMS MOVE ACROSS SOUTHWEST NEBRASKA PEOPLE IN THE
VICINITY SHOULD BE ON THE LOOKOUT FOR HAIL..HEAVY RAIN..GUSTY WINDS AND
DANGEROUS LIGHTNING.

MEYER

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 30, 8:46 PM CDTSevere Thunderstorm WarningLBFCherry59 min
Jul 30, 9:51 PM CDTSevere Thunderstorm WarningLBFCherry39 min
Jul 31, 8:25 AM CDTSevere Thunderstorm WarningLBFLincoln, Logan35 min
Jul 31, 6:36 PM CDTSevere Thunderstorm WarningLBFChase, Hayes, Perkins54 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; the sounding from the Mesonet's radiosonde archive.