Alert archive / Nebraska / Tornado Warnings in 2004

Tornado Warning 9, NWS Cheyenne, WY

August 15, 2004Box Butte County, Nebraska

NWS Cheyenne, WY issued this tornado warning at Aug 15, 2004, 5:24 PM MDT for Box Butte County, Nebraska. It was in force for 36 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: Aug 15, 2004, 5:24 PM MDT (23:24 UTC)
Expired: Aug 15, 2004, 6:00 PM MDT
In force: 36 min
Issued by: NWS Cheyenne, WY
Area: Counties, with a storm outline in the text

County Box Butte County, NE

The radar

The North Platte radar (KLNX), 189 km from the middle of the area, began a volume at 23:24 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

Rapid City, SD (KUNR), launched 12:00Z, 11.4 hours before the alert went out and 200 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: 4 J/kg
Mixed-layer CIN: -203 J/kg
Mixed-layer LCL: 2064 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 50 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.

000 
WFUS55 KCYS 152324
TORCYS
NEC013-160000-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
523 PM MDT SUN AUG 15 2004

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN BOX BUTTE COUNTY IN THE PANHANDLE OF NEBRASKA
  THIS INCLUDES THE CITY OF ALLIANCE

* UNTIL 600 PM MDT

* AT 518 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR WILD HORSE
  BUTTE...OR ABOUT 15 MILES NORTH OF ALLIANCE...MOVING SOUTH AT 15
  MPH.

* THIS STORM IS EXPECTED TO BE NEAR...
  WILD HORSE BUTTE BY 535 PM MDT
  ALLIANCE AND BRONCO LAKE BY 600 PM MDT

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.

THIS WARNING REPLACES THE SEVERE THUNDERSTORM WARNING THAT WAS IN 
EFFECT UNTIL 600 PM MDT FOR EASTERN BOX BUTTE COUNTY. 

LAT...LON 4241 10278 4240 10289 4206 10298 4206 10274

$$

RE

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 15, 5:13 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte	47 min

Nearby

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