Alert archive / Nebraska / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 31, NWS North Platte, NE

July 6, 1987Cedar County, Knox County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jul 6, 1987, 11:15 PM CDT for Cedar County, Knox County, Nebraska. It was in force for 60 min.

The area

The counties it named.

The facts

Issued
Jul 6, 1987, 11:15 PM CDT (04:15 UTC)
Expired
Jul 7, 1987, 12:15 AM CDT
In force
60 min
Issued by
NWS North Platte, NE
Area
Whole counties

Counties Cedar County, NE, Knox 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

Omaha, NE (KOAX), launched 00:00Z, 4.3 hours before the alert went out and 175 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, Omaha, NE at 00:00Z on 1987-07-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Omaha, NE at 00:00Z on 1987-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 26 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
3581 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
26 m²/s²
0-3 km storm-relative helicity
112 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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, 7:56 PM CDT, 3 hours 19 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

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 6, 8:08 PM CDTTornado WarningLBFArthur, Keith67 min
Jul 6, 8:12 PM CDTSevere Thunderstorm WarningLBFArthur48 min
Jul 6, 8:25 PM CDTSevere Thunderstorm WarningLBFPerkins55 min
Jul 6, 11:47 PM CDTSevere Thunderstorm WarningLBFStanton, Wayne43 min
Jul 7, 12:13 AM CDTSevere Thunderstorm WarningLBFPlatte47 min
Jul 7, 12:20 AM CDTSevere Thunderstorm WarningLBFLincoln55 min
Jul 7, 12:36 AM CDTSevere Thunderstorm WarningLBFKeith, Lincoln69 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; the sounding from the Mesonet's radiosonde archive.