Alert archive / Nebraska / Tornado Warnings in 1998

Tornado Warning 15, NWS Cheyenne, WY

June 22, 1998Scotts Bluff County, Sioux County, Nebraska

NWS Cheyenne, WY issued this tornado warning at Jun 22, 1998, 7:29 PM MDT for Scotts Bluff County, Sioux County, Nebraska. It was in force for 36 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: Jun 22, 1998, 7:29 PM MDT (01:29 UTC)
Expired: Jun 22, 1998, 8:05 PM MDT
In force: 36 min
Issued by: NWS Cheyenne, WY
Area: Whole counties

Counties Scotts Bluff County, NE, Sioux County, NE

The radar

The Cheyenne radar (KCYS), 144 km from the middle of the area, began a volume at 01:32 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.

What was reported inside it

Time	Report	Where	Remark
Jun 22, 7:57 PM MDT	Hail 0.75	Morrill, 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 watch it was issued in

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

Issued	Product	Office	Lasted
Jun 22, 2:30 PM MDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Rapid City, SD (KUNR), launched 00:00Z, 1.5 hours before the alert went out and 222 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 610 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 2011 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 77 m²/s²
0-3 km storm-relative helicity: 575 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 18.5

Open this sounding in Storm Lab

The text

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

534 
WFUS1 KCYS 230130 RRA
TORCYS
NEC157-165-230205-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
729 PM MDT MON JUN 22 1998

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWESTERN AND SOUTH CENTRAL SIOUX COUNTY IN THE NEBRASKA
  PANHANDLE
  NORTHWESTERN SCOTTS BLUFF COUNTY IN THE NEBRASKA PANHANDLE

* UNTIL 805 PM MDT

* AT 725 PM... SPOTTERS INDICATED A TORNADO 1 TO 2 MILES NORTH OF
  MITCHELL... MOVING EAST AT 15 MPH.  THIS IS ABOUT 15 MILES NORTHWEST
  OF SCOTTSBLUFF.

* THE TORNADO IS EXPECTED TO BE NEAR...
  THE STORM WILL BE MOVING ALONG THE SIOUX AND SCOTTSBLUFF COUNTY LINE
  OVER OPEN COUNTRY.

GO TO THE BASEMENT OR A SMALL INTERIOR ROOM ON THE LOWEST FLOOR

JAD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 22, 7:08 PM MDT	Tornado Warning	CYS	Scotts Bluff, Sioux	17 min
Jun 22, 8:08 PM MDT	Severe Thunderstorm Warning	CYS	Scotts Bluff, Sioux	32 min
Jun 22, 8:27 PM MDT	Tornado Warning	CYS	Box Butte, Morrill	18 min
Jun 22, 8:40 PM MDT	Severe Thunderstorm Warning	CYS	Scotts Bluff, Sioux	30 min
Jun 23, 4:46 PM MDT	Severe Thunderstorm Warning	CYS	Morrill	49 min
Jun 23, 5:37 PM MDT	Tornado Warning	CYS	Morrill	33 min

Nearby

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