Alert archive / Nebraska / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 72, NWS North Platte, NE

August 15, 1987Garfield County, Holt County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Aug 15, 1987, 5:31 PM CDT for Garfield County, Holt County, Nebraska. It was in force for 44 min.

The area

The counties it named.

The facts

Issued
Aug 15, 1987, 5:31 PM CDT (22:31 UTC)
Expired
Aug 15, 1987, 6:15 PM CDT
In force
44 min
Issued by
NWS North Platte, NE
Area
Whole counties

Counties Garfield County, NE, Holt 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, 10.5 hours before the alert went out and 184 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 1987-08-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 51 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 1987-08-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 117 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
51 J/kg
Mixed-layer CIN
-412 J/kg
Mixed-layer LCL
2636 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
117 m²/s²
0-3 km storm-relative helicity
116 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KOFK 152231
SVROFK
NEC071-089-152315-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORFOLK NE
531 PM CDT SAT AUG 15 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 615 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

NORTH CENTRAL NEBRASKA...NORTHERN GARFIELD AND SOUTHWEST HOLT

AT 525PM CDT RADAR INDICATED A SEVERE THUNDERSTORM 40 MILES
SOUTHWEST OF O NEILL...OR 15 MILES NORTH NORTHWEST OF BURWELL.
THIS STORM WAS MOVING TO THE NORTHEAST AT 15 MILES AN HOUR.
VERY HEAVY RAIN...LARGE HAIL AND STRONG WINDS CAN BE EXPECTED
WITH THIS STORM

THESE STORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO WITH LITTLE
OR NO WARNING...SO BE ON THE LOOKOUT AND BE PREPARED TO MOVE TO A
PLACE OF SAFETY.

 BOWMAN 2231Z

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 15, 6:37 PM CDTSevere Thunderstorm WarningLBFHolt68 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.