Alert archive / Nebraska / Tornado Warnings in 1987

Tornado Warning 14, NWS North Platte, NE

July 11, 1987Brown County, Rock County, Nebraska

NWS North Platte, NE issued this tornado warning at Jul 11, 1987, 1:10 AM CDT for Brown County, Rock County, Nebraska. It was in force for 35 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
Jul 11, 1987, 1:10 AM CDT (06:10 UTC)
Expired
Jul 11, 1987, 1:45 AM CDT
In force
35 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.

What was reported inside it

TimeReportWhereRemark
Jul 11, 1:10 AM CDTThunderstorm Wind 0Rock, 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, 6.2 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 00:00Z on 1987-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3373 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 1987-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 56 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
3373 J/kg
Mixed-layer CIN
-98 J/kg
Mixed-layer LCL
1858 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
56 m²/s²
0-3 km storm-relative helicity
113 m²/s²
Significant tornado parameter
0.1
Supercell composite
6.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KOFK 110610
TOROFK
NEC017-149-110645-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE NORFOLK NE
110 AM CDT SAT JUL 11 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 145 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF

NORTH CENTRAL NEBRASKA...EASTERN BROWN AND ROCK

AT 105 AM CDT A TORNADO WAS REPORTED 20 MILES SOUTH AND 3 WEST
OF AINSWORTH MOVING TO THE EAST AT 30 MILES AN HOUR.

PEOPLE IN THE PATH OF THIS TORNADO SHOULD GO TO A BASEMENT SHELTER
IF POSSIBLE...OTHERWISE GO TO A CENTRAL INTERIOR ROOM ON THE LOWEST
FLOOR.  ABANDON CARS AND MOBILE HOMES FOR A REINFORCED BUILDING.

 A SEVERE THUNDERSTORM WAT1CH REMAINS IN EFFECT FOR MOST OF NORTH
 CENTRAL NEBRASKA UNTIL 5 AM SATURDAY MORNING.
 VAN ALLEN 0609Z

What forecasters said that day

The local office's own words before this tornado 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 10, 7:30 PM CDT, 5 hours 40 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
730 PM CDT FRI JUL 10 1987

THUNDERSTORMS HAD LOST STRENGTH ACROSS PARTS OF SOUTHWEST NEBRASKA
THIS EVENING.

AT 725 PM CDT A STRONG THUNDERSTORM WAS IN SOUTH CENTRAL FRONTIER
COUNTY OF SOUTHWEST NEBRASKA BUT HAD LOST STRENGTH DURING THE PAST
HOUR.  THE THUNDERSTORM IN FRONTIER COUNTY WAS 10 MILES SOUTHEAST OF
CURTIS NEBRASKA OR 15 MILES NORTHEAST OF MCCOOK NEBRASKA MOVING
NORTHEAST AT 15 MILES AN HOUR.

THE STRONG THUNDERSTORM IN NORTHWEST LINCOLN COUNTY HAD DISSAPATED
AND IN ITS PLACE WAS ONLY RAINSHOWERS.

PEOPLE IN CENTRAL FRONTIER COUNTY SHOULD REMAIN ALERT TO DANGEROUS
LIGHTNING...LOCALLY HEAVY RAIN AND BRIEF GUSTY WIND AS THE STRONG
THUNDERSTORM MOVES THROUGH THAT COUNTY DURING THE EVENING HOURS.

MEYER
Special weather statement, Jul 10, 8:11 PM CDT, 4 hours 59 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
810 PM CDT FRI JUL 10 1987

THUNDERSTORMS CONTINUED TO DISSAPATE ACROSS SOUTHWEST NEBRASKA THIS
EVENING.

AT 810 PM CDT ALL THE STRONG THUNDERSTORMS THAT WERE IN FRONTIER AND
KEITH COUNTIES OF SOUTHWEST NEBRASKA HAD DISSAPATED.

THERE IS STILL A CHANCE OF SCATTERED THUNDERSTORMS ACROSS SOUTHWEAST
NEBRASKA TONIGHT BUT THEY ARE NO LONGER EXPECTED TO REACH LIMITS
WHERE THEY PRODUCE LARGE HAIL AND DAMAGING WINDS.

THIS WILL PROBABLY BE THE LAST SPECIAL WEATHER STATEMENT ISSUED BY
THE NORTH PLATTE NATIONAL WEATHER SERVICE UNLESS STORMS WOULD
REDEVELOP OR MOVE INTO SOUTHWEST NEBRASKA ONCE AGAIN.

MEYER

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 10, 7:08 PM CDTSevere Thunderstorm WarningLBFCherry52 min
Jul 10, 8:22 PM CDTSevere Thunderstorm WarningLBFKeya Paha68 min
Jul 10, 10:33 PM CDTSevere Thunderstorm WarningLBFGrant57 min
Jul 10, 11:13 PM CDTSevere Thunderstorm WarningLBFCherry57 min
Jul 10, 11:44 PM CDTSevere Thunderstorm WarningLBFHooker21 min
Jul 10, 11:44 PM CDTSevere Thunderstorm WarningLBFThomas46 min
Jul 11, 1:34 AM CDTSevere Thunderstorm WarningLBFHolt56 min
Jul 11, 2:14 AM CDTSevere Thunderstorm WarningLBFBoyd31 min

Nearby

Tornado Warnings in Nebraska, 1987Every tornado warning in 1987Tornadoes 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.