Alert archive / Nebraska / Tornado Warnings in 2004

Tornado Warning 80, NWS Omaha, NE

July 15, 2004Antelope County, Knox County, Nebraska

NWS Omaha, NE issued this tornado warning at Jul 15, 2004, 7:06 PM CDT for Antelope County, Knox County, Nebraska. It was in force for 39 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: Jul 15, 2004, 7:06 PM CDT (00:06 UTC)
Expired: Jul 15, 2004, 7:45 PM CDT
In force: 39 min
Issued by: NWS Omaha, NE
Area: Counties, with a storm outline in the text

Counties Antelope County, NE, Knox County, NE

The radar

The Sioux Falls radar (KFSD), 174 km from the middle of the area, began a volume at 00:06 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 15, 3:00 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 0.1 hours before the alert went out and 187 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: 2128 J/kg
Mixed-layer CIN: -136 J/kg
Mixed-layer LCL: 983 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 106 m²/s²
0-3 km storm-relative helicity: 206 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 10.6

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KOAX 160006 CCA
TOROAX
NEC003-107-160045-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING...CORRECTION TO TEXT LINE WITH SPOTTER REPORT
NATIONAL WEATHER SERVICE OMAHA NE
700 PM CDT THU JUL 15 2004

THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A

* TORNADO WARNING FOR...
  ANTELOPE COUNTY IN NORTHEAST NEBRASKA
  SOUTHERN KNOX COUNTY IN NORTHEAST NEBRASKA

* UNTIL 745 PM CDT

* AT 656 PM CDT...RADAR INDICATED A TORNADIC STORM AND TRAINED STORM
  SPOTTERS CONFIRM A TORNADO 11 MILES NORTH OF ORCHARD...OR ABOUT 23
  MILES EAST OF ONEILL...MOVING SOUTH AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  ORCHARD
  ROYAL
  CLEARWATER

A SPOTTER REPORTED A TORNADO 8 MILES NORTH OF ORCHARD AT 654 PM CDT.

IF YOU ARE IN THE PATH OF A TORNADO...GO TO A BASEMENT. IF A BASEMENT
IS NOT AVAILABLE...TAKE COVER IN AN INTERIOR ROOM ON THE LOWEST LEVEL
OF YOUR HOME OR BUSINESS. AVOID WINDOWS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT THURSDAY EVENING
FOR EASTERN NEBRASKA.

LAT...LON 4255 9801 4254 9830 4216 9826 4215 9796

$$

SMITH/DDN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 7:03 PM CDT	Tornado Warning	OAX	Antelope, Knox	42 min
Jul 15, 7:04 PM CDT	Tornado Warning	OAX	Antelope, Knox	41 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.