Alert archive / Nebraska / Tornado Warnings in 2020

Tornado Warning 9, NWS North Platte, NE

June 20, 2020Custer County, Lincoln County, Logan County, Nebraska

NWS North Platte, NE issued this tornado warning at Jun 20, 2020, 6:08 PM CDT for Custer County, Lincoln County, Logan County, Nebraska. It was in force for 52 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 20, 2020, 6:08 PM CDT (23:08 UTC)
Expired: Jun 20, 2020, 7:00 PM CDT
In force: 52 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Custer County, NE, Lincoln County, NE, Logan County, NE

The radar

The North Platte radar (KLNX), 73 km from the middle of the area, began a volume at 23:11 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.

What was reported inside it

Time	Report	Where	Remark
Jun 20, 6:40 PM CDT	NON-TSTM WND GST 64	8 Wsw Callaway, NE	TIME OF EVENT ESTIMATED FROM RADAR
Jun 20, 6:45 PM CDT	HAIL 1.75	7 W Callaway, NE

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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 20, 3:53 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 11.1 hours before the alert went out and 39 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: 35 J/kg
Mixed-layer CIN: -193 J/kg
Mixed-layer LCL: 828 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 67 m²/s²
0-3 km storm-relative helicity: 124 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

092 
WFUS53 KLBF 202308
TORLBF
NEC041-111-113-210000-
/O.NEW.KLBF.TO.W.0009.200620T2308Z-200621T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service North Platte NE
608 PM CDT Sat Jun 20 2020

The National Weather Service in North Platte has issued a

* Tornado Warning for...
  Northeastern Lincoln County in southwestern Nebraska...
  Southeastern Logan County in west central Nebraska...
  Southwestern Custer County in central Nebraska...

* Until 700 PM CDT.
    
* At 608 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Arnold, or 12 miles southeast of Stapleton, moving
  southeast at 35 mph.

  HAZARD...Tornado.

  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 Lincoln...southeastern Logan and southwestern Custer
  Counties, including the following locations... Finchville, Logan
  and Milldale.

This includes Highway 92 between mile markers 239 and 253.
 
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 4136 10044 4151 10031 4138 9992 4115 10007
TIME...MOT...LOC 2308Z 302DEG 32KT 4140 10029 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

Keck

3 follow-up statements

628 
WWUS53 KLBF 202328
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
628 PM CDT Sat Jun 20 2020

NEC041-111-113-210000-
/O.CON.KLBF.TO.W.0009.000000T0000Z-200621T0000Z/
Lincoln NE-Logan NE-Custer NE-
628 PM CDT Sat Jun 20 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR
NORTHEASTERN LINCOLN...SOUTHEASTERN LOGAN AND SOUTHWESTERN CUSTER
COUNTIES...
    
At 628 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Arnold, or 16 miles southeast of Stapleton, moving
southeast at 15 mph.

HAZARD...Tornado and ping pong ball 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.

Locations impacted include...
Arnold, Logan, Finchville and Milldale. 

This includes Highway 92 between mile markers 239 and 253.
 
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.

If a tornado or other severe weather is spotted, report it to the
National Weather Service or your local nearest law enforcement agency
who will send your report. This act may save lives of others in the
path of dangerous weather.

&&

LAT...LON 4136 10044 4151 10031 4138 9992 4115 10007
TIME...MOT...LOC 2328Z 304DEG 14KT 4135 10023 

TORNADO...RADAR INDICATED
HAIL...1.50IN

$$

Keck

791 
WWUS53 KLBF 202338
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
638 PM CDT Sat Jun 20 2020

NEC111-113-202347-
/O.CAN.KLBF.TO.W.0009.000000T0000Z-200621T0000Z/
Lincoln NE-Logan NE-
638 PM CDT Sat Jun 20 2020

...THE TORNADO WARNING FOR NORTHEASTERN LINCOLN AND SOUTHEASTERN
LOGAN COUNTIES IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
central Nebraska.

LAT...LON 4123 10022 4139 10011 4134 9994 4115 10007
      4117 10010
TIME...MOT...LOC 2337Z 297DEG 27KT 4128 10008 

$$

NEC041-210000-
/O.CON.KLBF.TO.W.0009.000000T0000Z-200621T0000Z/
Custer NE-
638 PM CDT Sat Jun 20 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR
SOUTHWESTERN CUSTER COUNTY...
    
At 637 PM CDT, a severe thunderstorm capable of producing a tornado
was located 8 miles west of Callaway, or 24 miles west of Broken Bow,
moving southeast at 30 mph.

HAZARD...Tornado and ping pong ball 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.

Locations impacted include...
Finchville and Milldale. 

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.

If a tornado or other severe weather is spotted, report it to the
National Weather Service or your local nearest law enforcement agency
who will send your report. This act may save lives of others in the
path of dangerous weather.

&&

LAT...LON 4123 10022 4139 10011 4134 9994 4115 10007
      4117 10010
TIME...MOT...LOC 2337Z 297DEG 27KT 4128 10008 

TORNADO...RADAR INDICATED
HAIL...1.50IN

$$

Keck

635 
WWUS53 KLBF 202351
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
651 PM CDT Sat Jun 20 2020

NEC041-210000-
/O.EXP.KLBF.TO.W.0009.000000T0000Z-200621T0000Z/
Custer NE-
651 PM CDT Sat Jun 20 2020

...THE TORNADO WARNING FOR SOUTHWESTERN CUSTER COUNTY WILL EXPIRE AT
700 PM CDT...
    
The tornado threat has diminished and the Tornado Warning has been
cancelled. However, large hail and damaging winds remain likely and a
Severe Thunderstorm Warning remains in effect for the area.

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
central Nebraska.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
North Platte.

LAT...LON 4123 10022 4139 10011 4134 9994 4115 10007
      4117 10010
TIME...MOT...LOC 2350Z 302DEG 32KT 4122 9996 

$$

Keck

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 3:52 PM CDT	Special Weather Statement	LBF	Lincoln	38 min
Jun 20, 4:04 PM CDT	Special Weather Statement	LBF	McPherson	41 min
Jun 20, 4:33 PM CDT	Special Weather Statement	LBF	Hayes	42 min
Jun 20, 4:42 PM CDT	Special Weather Statement	LBF	Blaine	48 min
Jun 20, 4:45 PM CDT	Special Weather Statement	LBF	Logan	45 min
Jun 20, 4:48 PM CDT	Severe Thunderstorm Warning	LBF	Blaine, Brown, Cherry, Thomas	42 min
Jun 20, 5:16 PM CDT	Special Weather Statement	LBF	Frontier	44 min
Jun 20, 5:22 PM CDT	Special Weather Statement	LBF	Logan	53 min
Jun 20, 5:26 PM CDT	Severe Thunderstorm Warning	LBF	Blaine, Brown, Cherry, Thomas	49 min
Jun 20, 5:28 PM CDT	Severe Thunderstorm Warning	LBF	Custer, Lincoln, Logan	47 min
Jun 20, 5:50 PM CDT	Severe Thunderstorm Warning	LBF	Frontier, Hayes, Lincoln	22 min
Jun 20, 5:55 PM CDT	Severe Thunderstorm Warning	LBF	Blaine, Custer, Loup	50 min
Jun 20, 6:25 PM CDT	Severe Thunderstorm Warning	LBF	Blaine, Custer, Garfield, Loup	50 min
Jun 20, 6:41 PM CDT	Severe Thunderstorm Warning	LBF	Custer	49 min

Nearby

Tornado Warnings in Nebraska, 2020 Every tornado warning in 2020 Tornadoes in 2020

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.