Alert archive / Nebraska / Tornado Warnings in 1997

Tornado Warning 21, NWS North Platte, NE

June 30, 1997Rock County, Nebraska

NWS North Platte, NE issued this tornado warning at Jun 30, 1997, 8:46 PM CDT for Rock County, Nebraska. It was in force for 64 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 30, 1997, 8:46 PM CDT (01:46 UTC)
Expired: Jun 30, 1997, 9:50 PM CDT
In force: 64 min
Issued by: NWS North Platte, NE
Area: Whole counties

County Rock County, NE

The radar

The North Platte radar (KLNX), 106 km from the middle of the area, began a volume at 01:49 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 30, 9:00 PM CDT	Hail 1.75	Rose, 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 30, 5:00 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 1.8 hours before the alert went out and 172 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: 2999 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 1596 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 75 m²/s²
0-3 km storm-relative helicity: 217 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 15.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLBF 010146 RRA
TORLBF
NEC149-010250-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
846 PM CDT MON JUN 30 1997

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE NE HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL 950 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN NORTH CENTRAL NEBRASKA

   ...SOUTHERN ROCK COUNTY
 
AT 843 PM CDT...A POSSIBLE TORNADO WAS INDICATED BY NORTH PLATTE
DOPPLER RADAR 26 MILES SOUTH SOUTHEAST OF AINSWORTH OR 7 MILES WEST
OF ROSE MOVING SOUTHEAST AT 15 MPH.

THE TORNADO IS EXPECTED TO REMAIN IN RURAL AREAS...JUST NORTHWEST OF
ROSE THROUGH 9 PM CDT.
 
IF YOU ARE IN THE PATH OF THIS TORNADO TAKE SHELTER IMMEDIATELY.
THE SAFEST PLACE IN A HOME OR BUSINESS IS AN INTERIOR ROOM ON THE
LOWEST FLOOR POSSIBLE. AVOID WINDOWS.

DAUGHERTY

The office that day

Everything else NWS North Platte, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 30, 7:17 PM CDT	Tornado Warning	LBF	Brown	33 min
Jun 30, 7:23 PM CDT	Tornado Warning	LBF	Cherry	32 min
Jun 30, 7:52 PM CDT	Tornado Warning	LBF	Brown	33 min
Jun 30, 7:56 PM CDT	Severe Thunderstorm Warning	LBF	Cherry	64 min
Jun 30, 8:00 PM CDT	Severe Thunderstorm Warning	LBF	Rock	65 min
Jun 30, 8:18 PM CDT	Flash Flood Warning	LBF	Brown	3 hr
Jun 30, 8:26 PM CDT	Tornado Warning	LBF	Brown	34 min
Jun 30, 8:37 PM CDT	Severe Thunderstorm Warning	LBF	Brown	48 min
Jun 30, 9:03 PM CDT	Severe Thunderstorm Warning	LBF	Blaine, Brown	62 min
Jun 30, 9:15 PM CDT	Severe Thunderstorm Warning	LBF	Loup	65 min
Jun 30, 9:31 PM CDT	Severe Thunderstorm Warning	LBF	Custer	64 min
Jun 30, 9:54 PM CDT	Tornado Warning	LBF	Loup	31 min
Jun 30, 10:25 PM CDT	Tornado Warning	LBF	Loup	30 min
Jun 30, 10:34 PM CDT	Severe Thunderstorm Warning	LBF	Custer	46 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.