Alert archive / Nebraska / Tornado Warnings in 1997

Tornado Warning 26, NWS Cheyenne, WY

July 10, 1997Box Butte County, Nebraska

NWS Cheyenne, WY issued this tornado warning at Jul 10, 1997, 7:31 PM MDT for Box Butte County, Nebraska. It was in force for 29 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
Jul 10, 1997, 7:31 PM MDT (01:31 UTC)
Expired
Jul 10, 1997, 8:00 PM MDT
In force
29 min
Issued by
NWS Cheyenne, WY
Area
Whole counties

County Box Butte County, NE

The radar

The Cheyenne radar (KCYS), 186 km from the middle of the area, began a volume at 01:31 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

Rapid City, SD (KUNR), launched 00:00Z, 1.5 hours before the alert went out and 206 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, Rapid City, SD at 00:00Z on 1997-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 111 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, Rapid City, SD at 00:00Z on 1997-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -32 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
111 J/kg
Mixed-layer CIN
-132 J/kg
Mixed-layer LCL
3645 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
-32 m²/s²
0-3 km storm-relative helicity
70 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 KCYS 110131 RRA
TORCYS
NEC013-110200-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
731 PM MDT THU JUL 10 1997

* TORNADO WARNING FOR
  SOUTHEASTERN BOX BUTTE COUNTY IN NORTHWESTERN NEBRASKA PANHANDLE

* UNTIL 800 PM MDT

* THIS STORM IS EXPECTED TO REMAIN IN RURAL AREAS.

* AT 727 PM MDT...A DEVELOPING TORNADO WAS REPORTED BY THE PUBLIC 3
  MILES EAST OF ALLIANCE MOVING EAST AT 25 MPH.
 
SEVERAL FUNNEL CLOUDS WERE REPORTED FROM THE PUBLIC ONE AND ONE HALF
MILE EAST OF ALLIANCE NEBRASKA IN SOUTHEAST BOX BUTTE COUNTY.
 
NEVER TRY TO OUTRUN A TORNADO IN YOUR VEHICLE!  STOP...GET OUT...AND
SEEK SHELTER IN A BASEMENT OR LIE FLAT IN A DITCH AND COVER YOUR HEAD.

PAL
(
&

The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 10, 7:21 PM MDTSevere Thunderstorm WarningCYSMorrill64 min
Jul 10, 8:23 PM MDTSevere Thunderstorm WarningCYSMorrill32 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.