Alert archive / Nebraska / Tornado Warnings in 1986

Tornado Warning 5, NWS North Platte, NE

April 17, 1986Keith County, Nebraska

NWS North Platte, NE issued this tornado warning at Apr 17, 1986, 1:01 PM MST for Keith County, Nebraska. It was in force for 29 min.

The area

The counties it named.

The facts

Issued
Apr 17, 1986, 1:01 PM MST (20:01 UTC)
Expired
Apr 17, 1986, 1:30 PM MST
In force
29 min
Issued by
NWS North Platte, NE
Area
Whole counties

County Keith 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, 8.0 hours before the alert went out and 89 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 1986-04-17Temperature 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, N. Platte/Lee Bi, NE at 12:00Z on 1986-04-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 223 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
NaN m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
223 m²/s²
0-3 km storm-relative helicity
222 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.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 17, 1:51 PM MSTSevere Thunderstorm WarningLBFKeith, Lincoln, Perkins39 min
Apr 17, 2:34 PM MSTSevere Thunderstorm WarningLBFHayes46 min
Apr 17, 2:40 PM MSTTornado WarningLBFArthur, Keith20 min
Apr 17, 3:07 PM MSTSevere Thunderstorm WarningLBFHayes13 min
Apr 17, 3:17 PM MSTSevere Thunderstorm WarningLBFFrontier, Red Willow38 min
Apr 17, 3:25 PM MSTTornado WarningLBFFrontier, Lincoln20 min
Apr 17, 3:56 PM MSTSevere Thunderstorm WarningLBFRed Willow59 min
Apr 17, 4:44 PM MSTTornado WarningLBFLincoln16 min
Apr 17, 4:58 PM MSTSevere Thunderstorm WarningLBFCuster57 min

Nearby

Tornado Warnings in Nebraska, 1986Every tornado warning in 1986Tornadoes 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.