Alert archive / Nebraska / Tornado Warnings in 1998

Tornado Warning 13, NWS Cheyenne, WY

June 13, 1998Sioux County, Nebraska; Goshen County, Wyoming

NWS Cheyenne, WY issued this tornado warning at Jun 13, 1998, 3:00 PM MDT for Sioux County, Nebraska; Goshen County, Wyoming. It was in force for 35 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
Jun 13, 1998, 3:00 PM MDT (21:00 UTC)
Expired
Jun 13, 1998, 3:35 PM MDT
In force
35 min
Issued by
NWS Cheyenne, WY
Area
Whole counties

Counties Sioux County, NE, Goshen County, WY

The watch it was issued in

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

IssuedProductOfficeLasted
Jun 13, 2:30 PM MDTTornado WatchSPC7 hr

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 9.0 hours before the alert went out and 220 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 1998-06-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 117 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 12:00Z on 1998-06-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 84 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
117 J/kg
Mixed-layer CIN
-221 J/kg
Mixed-layer LCL
2129 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
84 m²/s²
0-3 km storm-relative helicity
115 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.

335 
WFUS1 KCYS 132059 RRA
TORCYS
NEC165-WYC015-132135-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
300 PM MDT SAT JUN 13 1998

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN GOSHEN COUNTY IN SOUTHEASTERN WYOMING
  WESTERN SIOUX COUNTY IN THE NEBRASKA PANHANDLE

* UNTIL 335 PM MDT

* AT 257 PM MDT... SPOTTERS INDICATED A TORNADO 35 MILES NORTH OF
  TORRINGTON...OR 8 MILES SOUTH OF VAN TASSEL... MOVING EAST AT 15
  MPH.


* THE TORNADO IS EXPECTED TO REMAIN OVER OPEN COUNTRY

A TORNADO IS ON THE GROUND GO TO THE BASEMENT IF A BASEMENT IS NOT
AVAILABLE...GO TO A SMALL INTERIOR ROOM ON THE LOWEST FLOOR

WCJIN-WYSE

ROBINSON


&

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 13, 2:00 PM MDTSevere Thunderstorm WarningCYSScotts Bluff50 min
Jun 13, 2:37 PM MDTSevere Thunderstorm WarningCYSCheyenne48 min
Jun 13, 3:17 PM MDTSevere Thunderstorm WarningCYSBox Butte48 min
Jun 13, 1:17 PM MDTTornado WarningCYSLaramie33 min
Jun 13, 2:00 PM MDTSevere Thunderstorm WarningCYSGoshen45 min
Jun 13, 3:32 PM MDTSevere Thunderstorm WarningCYSPlatte48 min

Nearby

Tornado Warnings in Nebraska, 1998Tornado Warnings in Wyoming, 1998Every tornado warning in 1998Tornadoes in 1998

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.