Alert archive / Nebraska / Tornado Warnings in 1997

Tornado Warning 31, NWS North Platte, NE

August 21, 1997Frontier County, Nebraska

NWS North Platte, NE issued this tornado warning at Aug 21, 1997, 10:00 PM CDT for Frontier County, Nebraska. It was in force for 65 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: Aug 21, 1997, 10:00 PM CDT (03:00 UTC)
Expired: Aug 21, 1997, 11:05 PM CDT
In force: 65 min
Issued by: NWS North Platte, NE
Area: Whole counties

County Frontier County, NE

What was reported inside it

Time	Report	Where	Remark
Aug 21, 10:15 PM CDT	Hail 0.75	Curtis, 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
Aug 21, 7:00 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 3.0 hours before the alert went out and 69 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: 2266 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 1174 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 113 m²/s²
0-3 km storm-relative helicity: 301 m²/s²
Significant tornado parameter: 3.0
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 220259 RRA
TORLBF
NEC063-220405-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1000 PM CDT THU AUG 21 1997

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE NE HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL 1105 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTHWESTERN NEBRASKA

   ...FRONTIER COUNTY
 
AT 959 PM CDT...A POSSIBLE TORNADO WAS INDICATED BY NORTH PLATTE
DOPPLER RADAR 35 MILES SOUTHEAST OF NORTH PLATTE OR 4 MILES
NORTHWEST OF MOOREFIELD MOVING SOUTH AT 25 MPH.

A POSSIBLE TORNADO IS EXPECTED TO BE NEAR...

  MOOREFIELD                   BY 1005 PM CDT
  CURTIS                       BY 1015 PM CDT
  STOCKVILLE                   BY 1025 PM CDT

ADDITIONAL THUNDERSTORM DEVELOPMENT CONTINUES TO THE WEST OF THESE
STORMS. BE ALERT!

DO NOT USE YOUR CAR TO OUTRUN A TORNADO.  CARS ARE EASILY TOSSED
AROUND BY TORNADO WINDS.  IF YOU ARE CAUGHT IN THE PATH OF A
TORNADO...LEAVE THE CAR AND GO TO A STRONG BUILDING.  IF NO
STRUCTURE IS NEARBY...SEEK SHELTER IN A DITCH OR LOW SPOT.

WOOD

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 21, 7:06 PM CDT	Tornado Warning	LBF	Perkins	49 min
Aug 21, 7:24 PM CDT	Tornado Warning	LBF	Chase	46 min
Aug 21, 8:11 PM CDT	Tornado Warning	LBF	Chase	44 min
Aug 21, 8:15 PM CDT	Tornado Warning	LBF	Hayes	65 min
Aug 21, 9:19 PM CDT	Severe Thunderstorm Warning	LBF	Lincoln	61 min
Aug 21, 9:48 PM CDT	Tornado Warning	LBF	Lincoln	32 min
Aug 22, 7:57 AM CDT	Severe Thunderstorm Warning	LBF	Cherry	63 min
Aug 22, 9:26 AM CDT	Severe Thunderstorm Warning	LBF	Cherry	64 min
Aug 22, 10:20 AM CDT	Severe Thunderstorm Warning	LBF	Hooker, Thomas	60 min
Aug 22, 6:20 PM CDT	Tornado Warning	LBF	Thomas	35 min
Aug 22, 6:26 PM CDT	Tornado Warning	LBF	Logan	34 min
Aug 22, 6:31 PM CDT	Severe Thunderstorm Warning	LBF	Keya Paha	64 min
Aug 22, 6:59 PM CDT	Severe Thunderstorm Warning	LBF	Logan	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.