Alert archive / Nebraska / Tornado Warnings in 2004

Tornado Warning 8, NWS North Platte, NE

May 21, 2004Brown County, Nebraska

NWS North Platte, NE issued this tornado warning at May 21, 2004, 8:27 PM CDT for Brown County, Nebraska. It was in force for 33 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
May 21, 2004, 8:27 PM CDT (01:27 UTC)
Expired
May 21, 2004, 9:00 PM CDT
In force
33 min
Issued by
NWS North Platte, NE
Area
Counties, with a storm outline in the text

County Brown County, NE

The radar

The North Platte radar (KLNX), 78 km from the middle of the area, began a volume at 01:30 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.

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 1.5 hours before the alert went out and 161 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-pSkew-T log-p diagram, N. Platte/Lee Bi, NE at 00:00Z on 2004-05-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2197 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, N. Platte/Lee Bi, NE at 00:00Z on 2004-05-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 99 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
2197 J/kg
Mixed-layer CIN
-41 J/kg
Mixed-layer LCL
1985 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
99 m²/s²
0-3 km storm-relative helicity
266 m²/s²
Significant tornado parameter
0.0
Supercell composite
19.7

Open this sounding in Storm Lab

The text

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

038 
WFUS53 KLBF 220127
TORLBF
NEC017-220200-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
827 PM CDT FRI MAY 21 2004

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* TORNADO WARNING FOR...
  BROWN COUNTY IN NORTH CENTRAL NEBRASKA

* UNTIL 900 PM CDT

* AT 825 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 12 MILES SOUTH
  OF JOHNSTOWN...OR ABOUT 17 MILES SOUTHWEST OF AINSWORTH...MOVING
  EAST AT 35 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  RURAL CENTRAL BROWN COUNTY AROUND 840 PM CDT
  RURAL EASTERN BROWN COUNTY AROUND 900 PM CDT

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING 
GOLF BALL SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CDT SATURDAY MORNING
FOR NORTH CENTRAL NEBRASKA.

LAT...LON 4271 10018 4222 10015 4223 9968 4264 9969

$$
JWS

The office that day

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

IssuedProductOfficeCountiesLasted
May 21, 7:26 PM CDTSevere Thunderstorm WarningLBFCherry64 min
May 21, 8:19 PM CDTSevere Thunderstorm WarningLBFBrown41 min
May 21, 8:57 PM CDTTornado WarningLBFLoup, Rock48 min
May 21, 9:44 PM CDTTornado WarningLBFGarfield46 min
May 21, 9:57 PM CDTSevere Thunderstorm WarningLBFGarden48 min
May 21, 10:05 PM CDTSevere Thunderstorm WarningLBFGrant40 min
May 21, 10:18 PM CDTTornado WarningLBFWheeler42 min
May 21, 10:46 PM CDTSevere Thunderstorm WarningLBFGarden44 min
May 21, 11:01 PM CDTSevere Thunderstorm WarningLBFWheeler29 min
May 21, 11:02 PM CDTSevere Thunderstorm WarningLBFArthur43 min
May 22, 1:20 AM CDTSevere Thunderstorm WarningLBFHooker55 min
May 22, 2:43 PM CDTSevere Thunderstorm WarningLBFGarden62 min
May 22, 3:14 PM CDTTornado WarningLBFArthur, Grant46 min
May 22, 3:42 PM CDTTornado WarningLBFHooker63 min
May 22, 3:57 PM CDTSevere Thunderstorm WarningLBFKeith, Perkins63 min
May 22, 3:58 PM CDTSevere Thunderstorm WarningLBFHayes62 min
May 22, 4:10 PM CDTSevere Thunderstorm WarningLBFArthur, McPherson65 min
May 22, 4:28 PM CDTSevere Thunderstorm WarningLBFLincoln62 min
May 22, 4:45 PM CDTTornado WarningLBFMcPherson45 min
May 22, 4:48 PM CDTTornado WarningLBFHooker, Thomas42 min
May 22, 5:11 PM CDTTornado WarningLBFLincoln64 min
May 22, 5:26 PM CDTTornado WarningLBFLogan49 min
May 22, 5:43 PM CDTSevere Thunderstorm WarningLBFThomas32 min
May 22, 5:51 PM CDTSevere Thunderstorm WarningLBFBlaine39 min
May 22, 5:55 PM CDTSevere Thunderstorm WarningLBFChase, Hayes65 min
May 22, 5:59 PM CDTSevere Thunderstorm WarningLBFCuster61 min
May 22, 6:16 PM CDTTornado WarningLBFLogan29 min
May 22, 6:18 PM CDTSevere Thunderstorm WarningLBFLincoln57 min
May 22, 6:24 PM CDTTornado WarningLBFCuster51 min
May 22, 6:30 PM CDTSevere Thunderstorm WarningLBFBlaine30 min
May 22, 6:54 PM CDTSevere Thunderstorm WarningLBFFrontier36 min
May 22, 6:56 PM CDTSevere Thunderstorm WarningLBFLoup34 min

Nearby

Tornado Warnings in Nebraska, 2004Every tornado warning in 2004Tornadoes in 2004

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.