Alert archive / Nebraska / Tornado Warnings in 1997

Tornado Warning 37, NWS North Platte, NE

August 28, 1997Perkins County, Nebraska

NWS North Platte, NE issued this tornado warning at Aug 28, 1997, 5:09 PM MDT for Perkins County, Nebraska. It was in force for 66 min. 2 reports 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: Aug 28, 1997, 5:09 PM MDT (23:09 UTC)
Expired: Aug 28, 1997, 6:15 PM MDT
In force: 66 min
Issued by: NWS North Platte, NE
Area: Whole counties

County Perkins County, NE

The radar

The North Platte radar (KLNX), 152 km from the middle of the area, began a volume at 23:11 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
Aug 28, 5:30 PM MDT	Hail 0.88	Madrid, NE
Aug 28, 6:05 PM MDT	Hail 1.75	Elsie, 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 12:00Z, 11.2 hours before the alert went out and 93 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: 1148 J/kg
Mixed-layer CIN: -231 J/kg
Mixed-layer LCL: 1252 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: -69 m²/s²
0-3 km storm-relative helicity: 90 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLBF 282309 RRA
TORLBF
NEC135-290015-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
609 PM CDT (509 PM MDT) THU AUG 28 1997

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE NE HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL 615 PM MDT (715 PM CDT)
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTHWESTERN NEBRASKA

   ...NORTHERN PERKINS COUNTY
 
AT 508 PM MDT...A POSSIBLE TORNADO WAS INDICATED BY NORTH PLATTE
DOPPLER RADAR 9 MILES SOUTH OF OGALLALA MOVING EAST SOUTHEAST AT 5
MPH.

THE TORNADO IS EXPECTED TO REMAIN IN RURAL AREAS NORTH OF GRANT AND
MADRID.
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING.  AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR
LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

COGIL

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 28, 3:55 PM MDT	Tornado Warning	LBF	Deuel, Garden, Keith	50 min
Aug 28, 4:44 PM MDT	Severe Thunderstorm Warning	LBF	Keith	66 min
Aug 28, 4:58 PM MDT	Tornado Warning	LBF	Keith	47 min
Aug 28, 5:44 PM MDT	Tornado Warning	LBF	Perkins	61 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.