Alert archive / Nebraska / Tornado Warnings in 1997

Tornado Warning 6, NWS North Platte, NE

June 20, 1997Logan County, Nebraska

NWS North Platte, NE issued this tornado warning at Jun 20, 1997, 9:08 PM CDT for Logan County, Nebraska. It was in force for 32 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
Jun 20, 1997, 9:08 PM CDT (02:08 UTC)
Expired
Jun 20, 1997, 9:40 PM CDT
In force
32 min
Issued by
NWS North Platte, NE
Area
Whole counties

County Logan County, NE

What was reported inside it

TimeReportWhereRemark
Jun 20, 9:12 PM CDTHail 0.88Stapleton, NEA fast developing thunderstorm brought torrential rain, hail and high winds which damaged several thousand acres of crops.

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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 20, 3:30 PM CDTTornado WatchSPC7 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 2.1 hours before the alert went out and 50 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 1997-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3148 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 1997-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 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
3148 J/kg
Mixed-layer CIN
-74 J/kg
Mixed-layer LCL
1727 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
16 m²/s²
0-3 km storm-relative helicity
109 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.7

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
Jun 20, 7:16 PM CDTSevere Thunderstorm WarningLBFArthur, McPherson64 min
Jun 20, 7:25 PM CDTTornado WarningLBFCherry35 min
Jun 20, 8:20 PM CDTSevere Thunderstorm WarningLBFHooker, McPherson, Thomas45 min
Jun 20, 8:38 PM CDTSevere Thunderstorm WarningLBFLincoln62 min
Jun 20, 8:50 PM CDTSevere Thunderstorm WarningLBFLogan65 min
Jun 20, 9:00 PM CDTSevere Thunderstorm WarningLBFBlaine, Thomas65 min
Jun 20, 9:29 PM CDTSevere Thunderstorm WarningLBFCuster61 min
Jun 20, 9:41 PM CDTSevere Thunderstorm WarningLBFLincoln64 min
Jun 20, 10:42 PM CDTSevere Thunderstorm WarningLBFPerkins63 min
Jun 20, 10:53 PM CDTSevere Thunderstorm WarningLBFLincoln62 min
Jun 20, 11:15 PM CDTSevere Thunderstorm WarningLBFHayes65 min
Jun 20, 11:38 PM CDTSevere Thunderstorm WarningLBFFrontier62 min
Jun 21, 10:45 AM CDTSevere Thunderstorm WarningLBFHolt, Rock65 min

Nearby

Tornado Warnings in Nebraska, 1997Every tornado warning in 1997Tornadoes in 1997

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.