Alert archive / Nebraska / Tornado Warnings in 2003

Tornado Warning 71, NWS North Platte, NE

July 21, 2003Cherry County, Grant County, Nebraska

NWS North Platte, NE issued this tornado warning at Jul 21, 2003, 6:16 PM MDT for Cherry County, Grant County, Nebraska. It was in force for 44 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 21, 2003, 6:16 PM MDT (00:16 UTC)
Expired: Jul 21, 2003, 7:00 PM MDT
In force: 44 min
Issued by: NWS North Platte, NE
Area: Counties, with a storm outline in the text

Counties Cherry County, NE, Grant County, NE

The radar

The North Platte radar (KLNX), 92 km from the middle of the area, began a volume at 00:18 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 21, 3:50 PM MDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Rapid City, SD (KUNR), launched 00:00Z, 0.3 hours before the alert went out and 234 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: 27 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 2267 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 187 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.

084 
WFUS53 KLBF 220016
TORLBF
NEC031-075-220100-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
615 PM MDT MON JUL 21 2003

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* TORNADO WARNING FOR...
  GRANT COUNTY IN WEST CENTRAL NEBRASKA
  SOUTHWESTERN CHERRY COUNTY IN NORTH CENTRAL NEBRASKA

* UNTIL 700 PM MDT

* AT 613 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THE MOST DANGEROUS PART OF A SEVERE THUNDERSTORM WITH STRONG
  ROTATION 9 MILES NORTHEAST OF ASHBY...OR ABOUT 40 MILES NORTH OF
  ARTHUR...MOVING SOUTH AT 35 MPH. THIS STORM IS CAPABLE OF PRODUCING
  A TORNADO AT ANY TIME.

* THE DEVELOPING TORNADO WILL BE NEAR...
  6 MILES EAST OF ASHBY AROUND 625 PM MDT
  3 MILES WEST OF HYANNIS AROUND 630 PM MDT

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM MDT MONDAY EVENING FOR
WESTERN NEBRASKA.

THIS WARNING EXTENDS THE TORNADO WARNING FOR SOUTHWEST CHERRY COUNTY.

LAT...LON 4243 10141 4242 10195 4176 10204 4176 10147

$$
POWER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 6:06 PM MDT	Severe Thunderstorm Warning	LBF	Lincoln	54 min
Jul 21, 6:06 PM MDT	Tornado Warning	LBF	Chase	39 min
Jul 21, 6:29 PM MDT	Tornado Warning	LBF	Arthur	31 min
Jul 21, 6:41 PM MDT	Tornado Warning	LBF	Keith	49 min
Jul 21, 6:49 PM MDT	Tornado Warning	LBF	Chase	26 min
Jul 21, 6:51 PM MDT	Severe Thunderstorm Warning	LBF	Lincoln	24 min
Jul 21, 7:00 PM MDT	Tornado Warning	LBF	Arthur	30 min
Jul 21, 7:07 PM MDT	Severe Thunderstorm Warning	LBF	Frontier	38 min
Jul 21, 7:30 PM MDT	Tornado Warning	LBF	Arthur	30 min
Jul 21, 7:36 PM MDT	Tornado Warning	LBF	Keith	24 min
Jul 21, 8:10 PM MDT	Severe Thunderstorm Warning	LBF	Frontier	50 min

Nearby

Tornado Warnings in Nebraska, 2003 Every tornado warning in 2003 Tornadoes in 2003

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.