Alert archive / Nebraska / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 121, NWS North Platte, NE

September 18, 1986Brown County, Rock County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Sep 18, 1986, 9:01 AM CDT for Brown County, Rock County, Nebraska. It was in force for 59 min.

The area

The counties it named.

The facts

Issued
Sep 18, 1986, 9:01 AM CDT (14:01 UTC)
Expired
Sep 18, 1986, 10:00 AM CDT
In force
59 min
Issued by
NWS North Platte, NE
Area
Whole counties

Counties Brown County, NE, Rock 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, 2.0 hours before the alert went out and 163 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 1986-09-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1232 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 1986-09-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 196 square meters per square second.193958Sfc1 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
1232 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
579 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
196 m²/s²
0-3 km storm-relative helicity
373 m²/s²
Significant tornado parameter
1.6
Supercell composite
7.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KOFK 181401
SVROFK
NEC017-149-181500-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORFOLK NE
901 AM CDT THU SEP 18 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 1000 AM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

NORTH CENTRAL NEBRASKA...NORTHEAST BROWN AND NORTHERN ROCK

AT 858 AM A SEVERE THUNDERSTORM WAS 10 MILES SOUTHEAST OF AINSWORTH
MOVING EAST NORTHEiAST AT 25 MPH.

 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.


 SMITH

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, Sep 18, 7:56 AM CDT, 1 hour 5 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
654 AM CDT THU SEP 18 1986

AT 648 AM CDT AN INTENSE THUNDERSTORM HAS MOVED FROM THE PANHANDLE OF
NEBRASKA ACROSS THE NORTHERN PORTION OF GRANT COUNTY IN NEBRASKA. THE
DEPUTY SHERIFF FROM ASHBY NEBRASKA..WHICH IS 39 MILES EAST ALLIANCE
NEBRASKA REPORTED PEA TO MARBLE SIZE HAIL AND HEAVY RAINFALL. THIS
STORM WAS MOVING NORTHEAST AT 20 MPH.

HORN
Special weather statement, Sep 18, 8:08 AM CDT, 53 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE VALENTINE NE
755 AM CDT THU SEP 18 1986

THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN CHERRY COUNTY OF NORTH-
CENTRAL NEBRASKA REMAINS IN EFFECT UNTIL 830 AM CDT THIS THURSDAY
MORNING.

AT 745 AM CDT...RADAR SHOWED THE SEVERE THUNDERSTORM WAS 35 MILES
SOUTH OF VALENTINE NEBRASKA MOVING EAST AT 25 MPH. THIS STORM IS
STILL CAPABLE OF PRODUCING LARGE HAIL AND DAMAGING WINDS. THE TRACK
OF THIS STORM WILL TAKE IT OUT OF CHERRY COUNTY AND INTO BROWN COUNTY
IN ABOUT 30 MINUTES.

PEOPLE IN SOUTHEASTERN CHERRY AND SOUTHWESTERN BROWN COUNTIES OF THE
NORTHCENTRAL NEBRASKA SHOULD REMAIN ALERT FOR THIS STORM EARLY THIS
THURSDAY MORNING.

RODDA
Special weather statement, Sep 18, 8:40 AM CDT, 21 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE VALENTINE NE
835 AM CDT THU SEP 18 1986

THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN CHERRY COUNTY OF NORTH-
CENTRAL NEBRASKA HAS BEEN REISSUED AND WILL BE IN EFFECT UNTIL 1030
AM CDT THIS THURSDAY MORNING.

AT 815 AM CDT...RADAR SHOWED THE SEVERE THUNDERSTORM WAS 30 MILES
WEST OF MULLEN NEBRASKA MOVING EAST AT 25 MPH. THIS STORM IS CAPABLE
OF PRODUCING LARGE HAIL VERY HEAVY RAINS AND DAMAGING WI7NDS. THE
TRACK OF THIS STORM WILL TAKE IT ALONG THE SOUTHERN PART OF CHERRY
COUNTY...PERSONS IN SOUTHERN CHERRY COUNTY SHOULD REMAIN ALERT FOR
THIS STORM AND GO TO A SAFE PLACE IF THIS STORM IS SPOTTED.

RODDA

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 18, 6:01 AM CDTSevere Thunderstorm WarningLBFCherry59 min
Sep 18, 7:00 AM CDTSevere Thunderstorm WarningLBFCherry60 min
Sep 18, 7:58 AM CDTSevere Thunderstorm WarningLBFBrown62 min
Sep 18, 8:05 AM CDTSevere Thunderstorm WarningLBFCherry25 min
Sep 18, 8:30 AM CDTSevere Thunderstorm WarningLBFCherry2 hr
Sep 18, 2:38 PM CDTSevere Thunderstorm WarningLBFBoone42 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.