Alert archive / Nebraska / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 35, NWS North Platte, NE

July 6, 1987Keith County, Lincoln County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jul 6, 1987, 11:36 PM MDT for Keith County, Lincoln County, Nebraska. It was in force for 69 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 6, 1987, 11:36 PM MDT (05:36 UTC)
Expired
Jul 7, 1987, 12:45 AM MDT
In force
69 min
Issued by
NWS North Platte, NE
Area
Whole counties

Counties Keith County, NE, Lincoln 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 6, 11:37 PM MDTHail 0.75Keith, 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, 5.6 hours before the alert went out and 51 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 1987-07-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4064 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 1987-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 square meters per square second.1939Sfc1 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
4064 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
1720 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
175 m²/s²
Significant tornado parameter
0.8
Supercell composite
18.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLBF 070536
SVRLBF
NEC101-111-070645-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1236 AM CDT TUE JUL 7 1987

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

SOUTHWEST NEBRASKA...EASTERN KEITH AND WESTERN LINCOLN

RADAR INDICATES A SEVERE THUNDERSTORM 2 MILES SOUTHEAST OF PAXTON
MOVING NORTHEAST AT 15 MPH.

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 0535Z

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

Local storm report, Jul 6, 6:56 PM MDT, 4 hours 40 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE VALENTINE NE
745 PM CDT MON JUL 6 1987

SELS MKC OMA A VTN

TIME
620PM     CDT  PEA AND MARBLE SIZE HAIL AT MERRITT
               RESERVOIR.

635PM     CDT  PEA SIZE HAIL AT WSO VALENTINE.

730PM     CDT  TORNADO DESTROYED A BARN ON THE BRUCE REYMAN RANCH
               LOCATED 9 MILES WEST AND 6 MILES NORTH OF WOOD LAKE.
               Z
RODDA
Special weather statement, Jul 6, 10:55 PM MDT, 41 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1050 PM CDT MON JUL 6 1987

...SEVERE THUNDERSTORM WATCH FOR CUSTER COUNTY UNTIL 4 AM CDT
   TUESDAY MORNING...

INTENSE THUNDERSTORMS WERE CONTINUING TO DEVELOP OVER LINCOLN COUNTY OF
SOUTHWEST NEBRASKA MAINLY IN THE NORTH PLATTE AREA.  THE MOST INTENSE
THUNDERSTORM WAS LOCATED ABOUT 5 MILES NORTH OF NORTH PLATTE WITH PEA
SIZE HAIL...HEAVY RAIN AND WINDS OF 15 TO 20 MILES AN HOUR.

OTHER STRONG THUNDERSTORMS WERE SCATTERED ACROSS SOUTHWEST NEBRASKA AND
NEW THUNDERSTORMS WERE CONTINUING TO DEVELOP ACROSS PORTIONS OF KEITH COUNTY
IN THE OGALLALA AREA.

THESE THUNDERSTORMS WERE MOVING TO THE NORTHEAST AT 20 MILES AN HOUR.
MONSON

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 6, 7:08 PM MDTTornado WarningLBFArthur, Keith67 min
Jul 6, 7:12 PM MDTSevere Thunderstorm WarningLBFArthur48 min
Jul 6, 7:25 PM MDTSevere Thunderstorm WarningLBFPerkins55 min
Jul 6, 10:15 PM MDTSevere Thunderstorm WarningLBFCedar, Knox60 min
Jul 6, 10:47 PM MDTSevere Thunderstorm WarningLBFStanton, Wayne43 min
Jul 6, 11:13 PM MDTSevere Thunderstorm WarningLBFPlatte47 min
Jul 6, 11:20 PM MDTSevere Thunderstorm WarningLBFLincoln55 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.