Alert archive / Nebraska / Tornado Warnings in 1997

Tornado Warning 2, NWS North Platte, NE

May 6, 1997Custer County, Nebraska

NWS North Platte, NE issued this tornado warning at May 6, 1997, 10:29 PM CDT for Custer County, Nebraska. It was in force for 36 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 6, 1997, 10:29 PM CDT (03:29 UTC)
Expired
May 6, 1997, 11:05 PM CDT
In force
36 min
Issued by
NWS North Platte, NE
Area
Whole counties

County Custer County, NE

The radar

The North Platte radar (KLNX), 94 km from the middle of the area, began a volume at 03:32 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 3.5 hours before the alert went out and 79 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 1997-05-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 447 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 1997-05-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 64 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
447 J/kg
Mixed-layer CIN
-94 J/kg
Mixed-layer LCL
2513 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
64 m²/s²
0-3 km storm-relative helicity
214 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLBF 070330 RRA
TORLBF
NEC041-070405-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1029 PM CDT TUE MAY 6 1997

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE NE HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL 1105 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN CENTRAL NEBRASKA

   ...EASTERN CUSTER COUNTY
 
AT 1028 PM CDT...A DEVELOPING TORNADO WAS INDICATED BY NORTH PLATTE
DOPPLER RADAR 23 MILES EAST OF BROKEN BOW OR 8 MILES NORTH
NORTHEAST OF MASON CITY MOVING SOUTH SOUTHEAST AT 30 MPH.

THE TORNADO IS EXPECTED TO REMAIN IN RURAL AREAS.
 
IF YOU ARE IN THE PATH OF THIS TORNADO TAKE SHELTER IMMEDIATELY.
THE SAFEST PLACE IN A HOME OR BUSINESS IS AN INTERIOR RO8OM ON THE
LOWEST FLOOR POSSIBLE. AVOID WINDOWS.

The office that day

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

IssuedProductOfficeCountiesLasted
May 6, 7:03 PM CDTSevere Thunderstorm WarningLBFBrown62 min
May 6, 8:04 PM CDTSevere Thunderstorm WarningLBFBlaine, Brown61 min
May 6, 8:13 PM CDTTornado WarningLBFBlaine, Brown52 min
May 6, 9:00 PM CDTSevere Thunderstorm WarningLBFLoup65 min
May 6, 9:43 PM CDTSevere Thunderstorm WarningLBFCuster47 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.