Alert archive / Nebraska / Tornado Warnings in 1997

Tornado Warning 23, NWS Cheyenne, WY

June 25, 1997Cheyenne County, Nebraska

NWS Cheyenne, WY issued this tornado warning at Jun 25, 1997, 2:33 PM MDT for Cheyenne County, Nebraska. It was in force for 27 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 25, 1997, 2:33 PM MDT (20:33 UTC)
Expired: Jun 25, 1997, 3:00 PM MDT
In force: 27 min
Issued by: NWS Cheyenne, WY
Area: Whole counties

County Cheyenne County, NE

The radar

The Cheyenne radar (KCYS), 152 km from the middle of the area, began a volume at 20:33 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 25, 2:40 PM MDT	Hail 0.75	Potter, 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 25, 1:45 PM MDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 8.6 hours before the alert went out and 151 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: 51 J/kg
Mixed-layer CIN: -211 J/kg
Mixed-layer LCL: 1628 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 69 m²/s²
0-3 km storm-relative helicity: 122 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.

183 
WFUS1 KCYS 252034 RRA
TORCYS
NEC033-252100-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
233 PM MDT WED JUN 25 1997

* TORNADO WARNING FOR
  WESTERN CHEYENNE COUNTY IN WESTERN NEBRASKA PANHANDLE

* UNTIL 300 PM MDT

* SOME AFFECTED LOCATIONS INCLUDE
  POTTER THROUGH 240 PM

* AT 230 PM...A SPOTTER NEAR POTTER REPORTED A TORNADO 2 MILES WEST
  OF POTTER. THIS STORM WAS MOVING EAST-SOUTHEAST AT 15 MPH.

IF YOU ARE NEAR POTTER TAKE COVER NOW
 
 
&
JBS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 25, 12:54 PM MDT	Tornado Warning	CYS	Banner, Scotts Bluff	31 min
Jun 25, 1:26 PM MDT	Tornado Warning	CYS	Banner	34 min
Jun 25, 1:47 PM MDT	Severe Thunderstorm Warning	CYS	Kimball	43 min
Jun 25, 1:54 PM MDT	Tornado Warning	CYS	Kimball	36 min
Jun 25, 2:13 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne, Morrill	32 min
Jun 25, 2:29 PM MDT	Severe Thunderstorm Warning	CYS	Kimball	46 min
Jun 25, 2:44 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne	31 min

Nearby

Tornado Warnings in Nebraska, 1997 Every tornado warning in 1997 Tornadoes 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.