Alert archive / Nebraska / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 73, NWS Cheyenne, WY

July 8, 1997Dawes County, Sioux County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 8, 1997, 4:14 PM MDT for Dawes County, Sioux County, Nebraska. It was in force for 61 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 8, 1997, 4:14 PM MDT (22:14 UTC)
Expired
Jul 8, 1997, 5:15 PM MDT
In force
61 min
Issued by
NWS Cheyenne, WY
Area
Whole counties

Counties Dawes County, NE, Sioux County, NE

The radar

The Rapid City radar (KUDX), 176 km from the middle of the area, began a volume at 22:17 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 12:00Z, 10.2 hours before the alert went out and 169 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 12:00Z on 1997-07-08Temperature 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, Rapid City, SD at 12:00Z on 1997-07-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -49 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
1798 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
-49 m²/s²
0-3 km storm-relative helicity
67 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

412 
WUUS1 KCYS 082216 RRA
SVRCYS
NEC045-165-082315-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
414 PM MDT TUE JUL 8 1997

* SEVERE THUNDERSTORM WARNING FOR
  NORTHEASTERN SIOUX COUNTY IN NORTHWESTERN NEBRASKA PANHANDLE
  WESTERN DAWES COUNTY IN NORTHWESTERN NEBRASKA PANHANDLE

* UNTIL 515 PM MDT

* SOME LOCATIONS AFFECTED
  TOADSTOOL PARK                       BY 415 PM MDT

* AT 411 PM MDT...A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER
  RADAR 30 MILES WEST OF CHADRON OR 1 MILE SOUTHWEST OF TOADSTOOL
  PARK MOVING EAST AT 0 MPH.
 
 
IF YOU ARE DRIVING IN THIS AREA...YOU SHOULD BE PREPARED TO PULL OFF
THE ROAD FOR SHELTER AS THE THUNDERSTORMS APPROACH.

PAL

Nearby

Severe Thunderstorm Warnings in Nebraska, 1997Every severe thunderstorm warning 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.