Alert archive / Nebraska / Tornado Warnings in 1998

Tornado Warning 25, NWS Cheyenne, WY

July 15, 1998Kimball County, Nebraska

NWS Cheyenne, WY issued this tornado warning at Jul 15, 1998, 6:05 PM MDT for Kimball County, Nebraska. It was in force for 25 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
Jul 15, 1998, 6:05 PM MDT (00:05 UTC)
Expired
Jul 15, 1998, 6:30 PM MDT
In force
25 min
Issued by
NWS Cheyenne, WY
Area
Whole counties

County Kimball County, NE

The radar

The Cheyenne radar (KCYS), 91 km from the middle of the area, began a volume at 00:08 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.

What was reported inside it

TimeReportWhereRemark
Jul 15, 6:20 PM MDTThunderstorm Wind 55Kimball, NE

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 nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.1 hours before the alert went out and 261 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 1998-07-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 901 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 1998-07-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -20 square meters per square second.1939Sfc1 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
901 J/kg
Mixed-layer CIN
-68 J/kg
Mixed-layer LCL
2298 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
-20 m²/s²
0-3 km storm-relative helicity
-12 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.4

Open this sounding in Storm Lab

The text

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

263 
WFUS1 KCYS 160003 RRA
TORCYS
NEC105-160030-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
605 PM MDT WED JUL 15 1998

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* TORNADO WARNING FOR...
  WESTERN KIMBALL COUNTY IN THE NEBRASKA PANHANDLE

* UNTIL 630 PM MDT

* AT 600 PM...SPOTTERS INDICATED A TORNADO JUST NORTH OF I-80 AT MILE
  MARKER 5...MOVING EAST UNDER 10 MPH.  DOPPLER RADAR ALSO SHOWED
  ANOTHER SEVERE THUNDERSTORM 20 MILES NORTHWEST OF KIMBALL...NEAR THE
  BANNER COUNTY LINE.  THIS STORM WAS NEARLY STATIONARY.

* THE TORNADO IS EXPECTED TO BE NEAR...
  BUSHNELL AT 625 PM

IF YOU ARE IN A CAR...GO IN A NEARBY STURDY BUILDING AS A LAST
RESORT LIE FLAT IN A DITCH AND COVER YOUR HEAD.

JBS


&

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 15, 6:57 PM MDTSevere Thunderstorm WarningCYSKimball48 min

Nearby

Tornado Warnings in Nebraska, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.