Alert archive / Nebraska / Tornado Warnings in 2018

Tornado Warning 9, NWS North Platte, NE

June 17, 2018Keith County, Lincoln County, Perkins County, Nebraska

NWS North Platte, NE issued this tornado warning at Jun 17, 2018, 7:00 PM MDT for Keith County, Lincoln County, Perkins County, Nebraska. It was in force for 23 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: Jun 17, 2018, 7:00 PM MDT (01:00 UTC)
Expired: Jun 17, 2018, 7:23 PM MDT
In force: 23 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Keith County, NE, Lincoln County, NE, Perkins County, NE

The radar

The North Platte radar (KLNX), 120 km from the middle of the area, began a volume at 01:04 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
Jun 17, 1:35 PM MDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 1.0 hours before the alert went out and 57 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: 1477 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 1677 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 78 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 3.7

Open this sounding in Storm Lab

The text

As transmitted.

303 
WFUS53 KLBF 180100
TORLBF
NEC101-111-135-180145-
/O.NEW.KLBF.TO.W.0009.180618T0100Z-180618T0145Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service North Platte NE
800 PM CDT SUN JUN 17 2018

The National Weather Service in North Platte has issued a

* Tornado Warning for...
  Northeastern Perkins County in southwestern Nebraska...
  Southeastern Keith County in southwestern Nebraska...
  West central Lincoln County in southwestern Nebraska...

* Until 845 PM CDT/745 PM MDT/.
    
* At 759 PM CDT/659 PM MDT/, a severe thunderstorm capable of
  producing a tornado was located 7 miles southeast of Paxton, or 24
  miles east of Ogallala, moving northeast at 25 mph.

  HAZARD...Tornado and quarter size hail.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This tornadic thunderstorm will remain over mainly rural areas of
  northeastern Perkins...southeastern Keith and west central Lincoln
  Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4097 10131 4103 10135 4106 10132 4114 10119
      4097 10110 4096 10128
TIME...MOT...LOC 0059Z 240DEG 20KT 4103 10128 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

Taylor

2 follow-up statements

130 
WWUS53 KLBF 180111
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
811 PM CDT SUN JUN 17 2018

NEC101-111-135-180145-
/O.CON.KLBF.TO.W.0009.000000T0000Z-180618T0145Z/
Perkins NE-Keith NE-Lincoln NE-
811 PM CDT SUN JUN 17 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 845 PM CDT/745 PM MDT/
FOR NORTHEASTERN PERKINS...SOUTHEASTERN KEITH AND WEST CENTRAL
LINCOLN COUNTIES...
    
At 810 PM CDT/710 PM MDT/, a severe thunderstorm capable of producing
a tornado was located near Sutherland Reservoir State Recreation
Area, or 21 miles west of North Platte, moving northeast at 30 mph.

HAZARD...Tornado and quarter size hail.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This tornadic thunderstorm will remain over mainly rural areas of
northeastern Perkins...southeastern Keith and west central Lincoln
Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4097 10131 4103 10135 4106 10132 4114 10119
      4097 10110 4096 10128
TIME...MOT...LOC 0110Z 240DEG 27KT 4108 10117 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

Roberg

108 
WWUS53 KLBF 180123
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
823 PM CDT SUN JUN 17 2018

NEC101-111-135-180132-
/O.CAN.KLBF.TO.W.0009.000000T0000Z-180618T0145Z/
Perkins NE-Keith NE-Lincoln NE-
823 PM CDT SUN JUN 17 2018

...THE TORNADO WARNING FOR NORTHEASTERN PERKINS...SOUTHEASTERN KEITH
AND WEST CENTRAL LINCOLN COUNTIES IS CANCELLED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.  However gusty winds and heavy rain are still
possible with this thunderstorm.

A Tornado Watch remains in effect until 1000 PM CDT/900 PM MDT/ for
southwestern Nebraska.

Remember, a Severe Thunderstorm Warning still remains in effect for
Lincoln County until 9 PM CDT. 

LAT...LON 4097 10131 4103 10135 4106 10132 4114 10119
      4097 10110 4096 10128
TIME...MOT...LOC 0120Z 240DEG 20KT 4111 10109 

$$

Roberg

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 17, 6:24 PM MDT	Special Weather Statement	LBF	Holt	51 min
Jun 17, 6:52 PM MDT	Severe Thunderstorm Warning	LBF	Keith, Lincoln, Perkins	38 min
Jun 17, 7:21 PM MDT	Severe Thunderstorm Warning	LBF	Lincoln	39 min
Jun 18, 3:35 PM MDT	Special Weather Statement	LBF	Custer	40 min

Nearby

Tornado Warnings in Nebraska, 2018 Every tornado warning in 2018 Tornadoes in 2018

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.