Alert archive / Nebraska / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 231, NWS North Platte, NE

August 26, 2002Keith County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Aug 26, 2002, 8:29 PM MDT for Keith County, Nebraska. It was in force for 61 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 26, 2002, 8:29 PM MDT (02:29 UTC)
Expired: Aug 26, 2002, 9:30 PM MDT
In force: 61 min
Issued by: NWS North Platte, NE
Area: Counties, with a storm outline in the text

County Keith County, NE

The radar

The North Platte radar (KLNX), 134 km from the middle of the area, began a volume at 02:29 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
Aug 26, 5:10 PM MDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 2.5 hours before the alert went out and 105 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: 647 J/kg
Mixed-layer CIN: -283 J/kg
Mixed-layer LCL: 1438 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 293 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.

137 
WUUS53 KLBF 270229
SVRLBF
NEC101-270330-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
828 PM MDT MON AUG 26 2002

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL AND WESTERN KEITH COUNTY IN SOUTHWEST NEBRASKA...

* UNTIL 930 PM MDT...

* AT 824 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THE MOST DANGEROUS PART OF A SEVERE THUNDERSTORM ALONG A LINE
  EXTENDING FROM 10 MILES NORTHWEST OF LEMOYNE TO 4 MILES            
  NORTHWEST OF OGALLALA TO 5 MILES SOUTHEAST OF BRULE...MOVING       
  SOUTHEAST AT 35 MPH.

* SEVERE THUNDERSTORMS WILL BE...

  OVER LEMOYNE AROUND 840 PM MDT...
  6 MILES SOUTHWEST OF KEYSTONE AROUND 900 PM MDT...
  OVER ROSCOE AROUND 905 PM MDT...

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.

THIS THUNDERSTORM IS CAPABLE OF PRODUCING LARGE HAIL AND DAMAGING
WINDS.

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

LAT...LON 4137 10203 4118 10195 4100 10201 4101 10140
          4137 10168

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 26, 6:16 PM MDT	Severe Thunderstorm Warning	LBF	Garden	59 min
Aug 26, 7:16 PM MDT	Severe Thunderstorm Warning	LBF	Garden	59 min
Aug 26, 7:53 PM MDT	Severe Thunderstorm Warning	LBF	Keith	37 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2002 Every severe thunderstorm warning in 2002

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.