Alert archive / Nebraska / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 239, NWS North Platte, NE

July 21, 2003Frontier County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jul 21, 2003, 9:10 PM CDT for Frontier County, Nebraska. It was in force for 50 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, 9:10 PM CDT (02:10 UTC)
Expired: Jul 21, 2003, 10:00 PM CDT
In force: 50 min
Issued by: NWS North Platte, NE
Area: Counties, with a storm outline in the text

County Frontier County, NE

The radar

The Grand Island radar (KUEX), 147 km from the middle of the area, began a volume at 02:14 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, 4:50 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 2.2 hours before the alert went out and 270 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: 108 J/kg
Mixed-layer CIN: -119 J/kg
Mixed-layer LCL: 3151 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 47 m²/s²
0-3 km storm-relative helicity: 33 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KLBF 220210
SVRLBF
NEC063-220300-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
910 PM CDT MON JUL 21 2003

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN FRONTIER COUNTY IN SOUTHWEST NEBRASKA

* UNTIL 1000 PM CDT

* AT 908 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THE MOST DANGEROUS PART OF A SEVERE THUNDERSTORM 4 MILES WEST OF
  EUSTIS...OR ABOUT 14 MILES NORTHWEST OF ELWOOD...MOVING SOUTHEAST
  AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  FARM AND RANGELANDS OF EAST CENTRAL FRONTIER COUNTY
  FARM AND RANGELANDS OF EXTREME EAST CENTRAL FRONTIER COUNTY

IF YOU ARE IN THE PATH OF THIS STORM...SEEK SHELTER IN A SMALL
INTERIOR ROOM AWAY FROM WINDOWS. A BASEMENT OFFERS THE BEST
PROTECTION.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT MONDAY EVENING
FOR WESTERN NEBRASKA.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY FOR RELAY
TO THE NATIONAL WEATHER SERVICE.

LAT...LON 4068 10032 4035 10029 4035 10011 4045 10010
          4047 10000 4068 10000

$$

BUTTLER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 7:06 PM CDT	Severe Thunderstorm Warning	LBF	Lincoln	54 min
Jul 21, 7:06 PM CDT	Tornado Warning	LBF	Chase	39 min
Jul 21, 7:16 PM CDT	Tornado Warning	LBF	Cherry, Grant	44 min
Jul 21, 7:29 PM CDT	Tornado Warning	LBF	Arthur	31 min
Jul 21, 7:41 PM CDT	Tornado Warning	LBF	Keith	49 min
Jul 21, 7:49 PM CDT	Tornado Warning	LBF	Chase	26 min
Jul 21, 7:51 PM CDT	Severe Thunderstorm Warning	LBF	Lincoln	24 min
Jul 21, 8:00 PM CDT	Tornado Warning	LBF	Arthur	30 min
Jul 21, 8:07 PM CDT	Severe Thunderstorm Warning	LBF	Frontier	38 min
Jul 21, 8:30 PM CDT	Tornado Warning	LBF	Arthur	30 min
Jul 21, 8:36 PM CDT	Tornado Warning	LBF	Keith	24 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2003 Every severe thunderstorm warning 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.